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tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 1 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 description the pt4316 is a very low power consumption singl e chip ook/ask superheterodyne receiver for the 315mhz and 434mhz frequency bands and which offers a hi gh level of integration and requires few external components. the pt4316 cons ists of a low-noise amplifier (lna), mixer, saw-based local oscillator, on-chip sallen-key low- pass filter, intermediate frequency (i f) limiting amplifier stage with received-signal-strength indicator (rssi), and analog baseband data recovery circuitry (data filter, peak detector, and data slicer). the pt4316 also implements a discrete o ne-step automatic gain control (agc) that reduces the lna gain by 20db w hen the rf input signal is greater than -60dbm. the pt4316 is available in a 16-pi n sop or ssop package. both vers ions are specified over the extended temperature range (-40 to +85 ). features ? low current consumption (4.2ma at vdd = 3.0v) ? 2.4v to 3.6v supply voltage operation range ? optimized for 315mhz or 434mhz ism band ? saw-based oscillator with low frequency drift ? high dynamic range with on-chip agc ? power down mode with very low supply current (<1 a) ? low external parts count ? available in 16 pins, sop or ssop package applications ? keyless entry systems ? remote control systems ? garage door openers ? alarm systems ? security systems ? wireless sensors
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 2 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 block diagram lna mixer rssi data filter data slicer if low-pass filter saw oscillator buffer 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 ce agc cagc rfin vsslna lnaout limin dffb dsp vdd vss dsn data pdout opp oscin oscout peak detector limiter with rssi bias
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 3 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 pin configuration
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 4 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 pin description pin name i/o description pin no. ce i chip enable 1 cagc o agc capacitor 2 rfin i rf input 3 vsslna g ground for lna 4 lnaout o lnaout 5 limin i limiting amplifier de-coupling input 6 dffb i data filter feedback point 7 dsp i positive input of data slicer (data filter output) 8 vdd p power supply 9 opp i non-inverting op-amp input 10 pdout o peak detector output 11 dsn i negative input of data slicer 12 data o data output 13 vss g ground 14 oscin i oscillator input 15 oscout o oscillator output 16
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 5 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 function description the pt4316 cmos superheterodyne receiv er provides the functionality of a complete receive chain from an antenna input to digital data output. d epending upon signal power and component selection, data rates as high as 50 kb/s may be achieved. low noise amplifier (lna) the lna is an on-chip cascode amplifier with a power gain of 16db and a noise figure of 3db. the gain is determined by external matching networks sit uated ahead of the lna and between the lna output and the mixer input. an example of the input matching network and t he input impedance of pt4316 for 315/434mhz bands are shown in the following figure. the component va lues given in the table following the application circuit are nominal values only. for a particular pcb layout, the user may be required to make component adjustments in order to achieve highest sensitivity. c3 c4 c2 3 rfin frequency (mhz) lna input impedance (pin 3) normalized to 50 ? 315 4.18 ? j251.63 433.92 3.60 ? j180.20 the lna output of pt4316 internally connects to the mixer stage so that its output impedance cannot be measured directly. the lna out put requires a dc supply through a choke inductor. for obtaining better lna gain, a capacitor is recommended to be added in parallel with this inductor to implement a resonant tank at the des ired frequency as shown in the following figure. note that the lna might self-oscillate and degrade the receiver s ensitivity, particularly if a large inductor value is chosen. an alternate matching method is to replac e the parallel capacitor with a 330 to 1k ? resistor, which would reduce the resonant tank q (quality fa ctor) and avoid the self-oscillation. c5 c8 5 lnaout r1 l2 vdd
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 6 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 the lna incorporates gain control circuitry. w hen the rssi voltage exceeds a threshold reference value corresponding to an rf input level of approxim ately -60dbm, the agc s witches on the lna gain reduction resistor. the loading resistor reduces the lna gain by 20db, ther eby reducing the rssi output by approximately 280mv. t he threshold reference voltage wh ich is compared with the rssi voltage to determine the gain state of the lna is also reduced. the lna resumes high-gain mode when the rssi voltage drops below this lower threshold voltage corresponding to approximately - 66dbm rf input. the agc has a hysteresis of around 6db and the time constant of the agc response is determined by the value of the capacitor connected to pin 2 (cagc). the capacitor value should be chosen with consideration of the data rate. mixer the doubly-balanced mixer down-converts the input frequency (rf) in the range of 250mhz to 500mhz to the intermediate frequen cy (if) at 1.2mhz with a volt age gain of approximately 20db by utilizing either high- or low-side inje ction of the local oscillator signal. in the case that the rf input to the mixer is single-ended, the unused mixer input must be tied to ground via a capacitor. the mixer is followed by a low pass filter with a corner frequency of 5mhz in order to suppress rf signals at the if output. both the desired signal band and image signal band are c onverted to the if band. if the environment, especially the image channel, is noisy, it is reco mmended that an external saw filter be added to remove the unwanted signals. the channel selectivity i ndicates the ability of the noise rejection. the measurement of channel selectivity of pt4316 without the external saw filt er is shown in the figure as the following. sensitivity and selectivity @434 mhz band -110 -100 -90 -80 -70 -60 -50 430.92 432.42 433.92 435.42 436.92 438.42 439.92 rf input frequency (mhz) rf input power (dbm) selectivity sensitivity
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 7 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 if low-pass filter the built-in if filter is composed of three sallen-key low-pass filter stages and it has a -3db bandwidth of 3.1mhz. one stage sallen-key f ilter and frequency response of thr ee cascaded filters as following figure. saw oscillator the saw oscillator is configured as a colpitts osc illator but consists of 3 cascaded amplifiers instead of a single amplifier. although the ci rcuit configuration is quite similar to the conventional colpitts oscillator, this configuration is capable of generating a much higher value of negative resistance. the one-port saw resonator is connected betw een pin 15 (oscin) and pin 16 (oscout). the capacitor connected from pin 15 (oscin) to ground is used for adjusting the oscillation frequency. in general, this capacitor is unnecessary if the frequen cy drift can be ignored. t he figures at below, an equivalent circuit of a saw resonator and its co mponent valuesare, are shown for reference. *optional *c11 saw resonator 16 oscin oscout 15 c1 l1 c0 r1 saw resonator equivalent circuit part number center frequency(mhz) r1 ( ? ) l1 ( h) c1 (pf) c0 (pf) mfsra316.2 316.2 19 119.06 0.00213 2.4 mfsra435.2 435.2 20 86.47 0.00155 2.0
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 8 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 for down-converting the rf signal to the if frequen cy, a suitable saw oscilla tion frequency must be chosen. for the pt4316, the -3db bandwidth of the if chain is located from 250khz to 3.1mhz and its optimum value is around 1.2mhz. the following equation may be utilized to calculate an appropriate saw oscillator frequency. saw oscillator (freq.) = tx (freq.) +/ ? (250khz ~ 3.1mhz) in addition to a saw resonator, the resonant circui t may also be achieved by an ?l-c tank?. the recommended circuit for an ?l-c tank? is as the following figure. 16 oscin oscout 15 c14 c15 limiter/rssi the limiter is an ac coupled multi- stage amplifier with a cumulative ga in of approxim ately 70db that has a band-pass characteristic centered around 2mhz. the - 3db bandwidth of the limiter is around 5mhz (from 250khz to 5.2mhz). t he limiter circuit also produces an rssi voltage that is directly proportional to the input signal level with a slope of approximately 14mv/db. th is signal is used to demodulate ask-modulated receive signals in the subsequent baseband circuitry. frequency (mhz) c14 (pf) c15 (pf) trimmer l3 (h) 315 100 10 2.5 t 433.92 100 5.6 1.5 t
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 9 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 auto gain control (agc) the agc circuitry monitors the rssi voltage leve l. as described above, when the rssi voltage reaches a first value corresponding to an rf input level of approximately -6 0dbm, the agc reduces the lna gain by 20db, ther eby reducing the rssi output by appr oximately 280mv. when the rssi voltage drops below a level corresponding to an rf i nput of approximately -66db m, the agc sets the lna back to high-gain mode. the change of rssi voltage versus rf input power is shown as the following figure. when the rssi level increases and then exceeds 1.68 v (rf input power rising), the agc s witches the lna from high-gain mode to low-gain mode. as rssi level decreases back to 1.25v (rf input power falling), the agc switches the lna from low- gain mode back to high-gain mode. rssi curve w/wo agc function 1.00 1.15 1.30 1.45 1.60 1.75 1.90 -120 -100 -80 -60 -40 -20 rf input power (dbm) rssi voltage (v) rf power from low to high rf power from high to low rssi curve without agc rssi vs. rf input power
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 10 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 data filter the data filter is also implement ed as a 2nd-order low-pass sallen-key filter as shown in the following figure. the pole locations are set by the combi nation of two on-chip resistors and two external capacitors. adjusting the value of the external capacitors changes t he corner frequency to optimize for different data rates. the corner frequency should be set to approximatel y 1.5 times the highest expected data rate from the transmitter. ideal sallen-key filter is as the following figure. c6 c7 r r v in v out utilizing the on-board volt age follower and the two 100k ? on-chip resistors, a 2 nd -order sallen-key low pass data filter can be constructed by adding 2 exte rnal capacitors between pins 7 (dffb) and 8 (dsp) and to pin 10 (opp) as depicted in the application circuit (see p.18). the following table shows the recommended values of the capacitors for the different data rate. data rate c6 (pf) c7 (pf) < 2kb/s 1000 270 2kb/s ? 10kb/s 470 150 10kb/s ? 20kb/s 150 56 20kb/s ? 40kb/s 56 15 > 40kb/s (see note) 15 4.7 note: the maximum data rate of pt4316 is 50kb/s
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 11 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 peak detector the peak detector generates a dc voltage which is propor tional to the peak value of the received data signal. an external r-c network is necessary. the peak detector input is connected to the rssi output of the limiter and the output is connected to pin 8 (dsp). this out put can be used as an indicator for the received signal strength for use in wake-up circuits and as a reference for the data slicer in ask mode. the time constant is calculated with the dr iving current of the data filter op-amp, 100 a. circuit for using peak detector for faster start-up as the following figure. data output data slicer r4 data filter c12 12 11 r5 data slicer the data slicer consists chiefly of a fast comparator, which allows for a maximum receive data rate of up to 50kb/s. the maximum achievable data rate al so depends upon the if filter bandwidth. both data slicer inputs are accessible off-chip to allow for ea sy adjustment of the slici ng threshold. the output delivers a digital data signal (cmos level) for subs equent circuits. the self-adjusting threshold on pin 12(dsn) is generated by an r- c network or peak detector depending upon the baseband coding scheme. the suggested data slicer confi guration uses an internal 100k ? resistor connected between dsn and dsp with a capacitor from dsn to ground as shown in the following fi gure. the cut-off frequency of the r-c integrator must be set lower than the lowest frequency appearing in the data signal to minimize distortion in the output signal. circuit for generat ing data slicer threshold as following figure. data output data slicer data filter c12 12 11
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 12 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 demodulation by the different circuit combination, the pt 4316 can achieve two demodul ation modes, which are called ?peak mode? and ?average mode.? peak mode by adjusting the ratio of r4/r9, the threshold voltage can be set at the peak detector output for comparison (see the figure of circu it for using peak detector for faster start-up at p.11). the demodulated data would go into a quasi-mute state as the rf input signal becom es very small, which means when there is no rf signal re ceived or the rf signal is too sm all, the data output will remain mostly at a logic ?high? level. if the environment is very noisy, the r4 value may be enlarged to achieve better immunity against noise but at the cost of less sensitivity. average mode when the ?average mode? has been set (s ee the figure of circuit for gener ating data slicer threshold at p.11), the data output will exhibit a toggling behaviour similar to random noise. in this mode, better sensitivity may be achieved, but noise i mmunity is worse than in ?peak mode.? power-down control the chip enable (ce) pin controls the power on/off behaviour of the pt4316. connecting ce to ?high? sets the pt4316 to the normal oper ation mode; connecting ce to ?low? sets the pt4316 to standby mode. the chip consumpti on current will be lower than 1 a in standby mode. once enabled, the pt4316 requires <10ms to recover received data. timing plot of pt4316 chip enable as following figure. pt4316 ce osc data o/p
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 13 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 antenna design for a /4 dipole antenna and operating frequency, f (in mhz), the requi red antenna length, l (in cm), may be calculated by using the formula f l 7132 = . for example, if the frequency is 315mhz, then the length of a /4 antenna is 22.6cm. if the calculated antenna length is too long for the applic ation, then it may be reduced to /8, /16, etc. without degrading the input return loss. howe ver, the rf input matching circuit may need to be re-optimized. note that in general, the shorter the antenna, the worse the receiver sensitivity and the shorter the detection distance. usually, when designing a /4 dipole antenna, it is better to use a single conductive wire (diameter about 0.8 mm to 1.6 mm) rather than a multiple core wire. if the antenna is printed on the pcb, ensure there is neither any component nor ground plane underneath the antenna on the backside of pcb. for an fr4 pcb ( r = 4.7) and a strip-width of 30mil, the length of the antenna, l (in cm), is calculated by r f c l = 4 where ?c? is the speed of light (3 x 1010 cm/s) when the pt4316 is operated in a noisy environment, it is recommended that an external saw filter be added between the input matching network and antenna.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 14 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 pcb layout consideration proper pcb layout is extr emely critical in achieving good rf per formance. at the very least, using a two-layer pcb is strongly recommended, so that one layer may incorporate a continuous ground plane. a large number of via holes should connect the ground plane areas between the top and bottom layers. note that if the pcb design in corporates a printed loop antenna, there should be no ground plane beneath the antenna. within the pt4316, the power supply rails of t he lna and others blocks s hould be separated for improving the isolation and minimizing the noise coupli ng effects. careful consideration must also be paid to the supply power and ground at the board level. the larger gr ound area plane should be placed as close as possible to the vss and vsslna pins. to reduce supply bus noise coupling, sensitive blocks such as the lna or mixer should be biased th ru separated power supply traces, incorporating series-r, shunt-c filtering as the following figure. if the power source is capable of supplying a stable voltage, c? may be ignored. in some applications, the dc source may be supplied from a simple ac-dc transformer. in such cases, the dc voltage level could be unstable and may adversely affect ask/ook re ceiver sensitivity. a solution may be to increase c to an appropriately large value while continuing to make the power source as stable as possible. finally, in an rf system, it is extrem ely important to keep the lna or rf signal traces away from large voltage swing signals and digital data signal traces to avoid unnecessary interference.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 15 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 absolute maximum ratings (v ss = 0 v) parameter symbol rating unit supply voltage range v dd v ss - 0.3 to v ss + 6.0 v soldering temperature t sld 225 soldering time t stg 10 s operating temperature range topr -40 to 85 storage temperature range tstg -55 to 150 recommended operating conditions (v ss = 0 v) value parameter symbol min. typ. max. unit supply voltage range v dd 2.4 3.0 3.6 v operating temperature t a -40 27 85
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 16 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 electrical characteristics (v dd = 3.0v, v ss = 0v, ce = ?high?, temp= +27 , f rf = 433.92mhz) value parameter symbol condition min. typ. max. unit general characteristics frequency range f rf 250 500 mhz maximum receiver input level p rf, max -20 -10 dbm ask (see note 2), peak power level -103 -100 sensitivity (see note 1) s in ook, peak power level -97 -94 dbm data rate (see note 3) d rate 1 50 kb/s power supply supply voltage v dd 2.4 3.0 3.6 v consumption dc current i dd ce = ?high? 4.2 4.6 ma standby dc current i stand-by ce = ?low? 1.0 a lna power gain g lna matched to 50 ? 16 18 db noise figure nf lna matched to 50 ? 3 3.6 db input third-order intermodulation intercept point iip3 lna matched to 50 ? -12 dbm auto gain control (agc) agc attack and decay ratio (see note 4) ra agc t attack /t decay 0.1 - agc leakage current i leak,agc at +85 100 na lna gain from low to high 1.25 agc threshold voltage v thresh lna gain from high to low 1.68 v lna gain from low to high -66 agc threshold referred to the rf input power (see note 5) p in,thresh lna gain from high to low -60 dbm down-conversion mixer conversion voltage gain g mix 16 20 db noise figure (ssb) nf mix 19 20 db input third-order intermodulation intercept point iip3 mix -16 dbm if filter bandwidth bw iff 3.1 mhz saw oscillator start-up time t osc,start 200 s if limiting amplifier if frequency f if 1.2 mhz
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 17 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 value parameter symbol condition min. typ. max. unit bandwidth bw lim 5 mhz rssi dynamic range dr rssi 70 db rssi curve slope sl rssi 14 10.8 mv/db p rf < -120dbm 1.0 rssi level v rssi p rf > -30dbm 1.8 v data filter bandwidth bw df 1 50 khz maximum load capacitance c load,ds 20 pf notes: 1. ber = 1e-3, data rate = 2kb/s. 2. use am 99% with square wave modulation (i f limited by capabilities of signal generator). 3. data rate selection affects choice of com ponent values for data filter, peak detector and slicer. 4. agc attack and decay currents are around 15 a and 1.5 a. 5. agc threshold depends on the gain setting and matching of lna.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 18 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 application circuit c9 c2 c3 l1 c6 l2 c5 c7 r1 c10 c1 c12 r2 r4 r5 s1 dat a vdd vdd enable antenna r6 c11 c4 c8 r3 cagc 2 rfin 3 vsslna 4 lnaout 5 limb 6 op p 10 dffb 7 dsp 8 pdout 11 dsn 12 vdd 9 ce 1 dat a 13 vss 14 oscout 16 os cin 15 pt4316 value for 315mhz value for 434mhz component peak mode average mode peak mode average mode unit s1 (see note 1) 313.2 ? 314.5 315.5 ? 316.8 432.1 ? 432.4 434.4 ? 435.7 mhz r1, r2 33 33 33 33 ? r3 10k 10k 10k 10k ? r4 12k ? 12k ? ? r5 1m ? 1m ? ? r6 1k 1k 1k 1k ? l1 56n 56n 33n 33n h l2 82n 82n 68n 68n h c1, c5, c10, c12 100n 100n 100n 100n f c2 10p 10p 10p 10p f c3 1.8p 1.8p 1.8p 1.8p f *c4 0.56p 0.56p 0.56p 0.56p f c6 470p 470p 470p 470p f c7 150p 150p 150p 150p f *c8 1.5p 1.5p ? ? f c9 100p 100p 100p 100p *c11 ? ? ? ? f notes: 1. s1 is the saw resonator, and 700khz frequency difference is acceptabl e for 2db sensitivity variation. 2. the data filter and slicer are optimized for 1k ~ 5kbps data rate in this application circuit. 3. * (c4, c8 and c11) means the optional component.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 19 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 test board layout
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 20 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 order information valid part number package type top code PT4316-S (l) 16 pins, sop, 150mil PT4316-S pt4316-x (l) 16 pins, ssop, 150mil pt4316-x notes: 1. (l) means lead free. 2. the lead free mark is placed in-front of the date code.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 21 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 package information 16 pins, sop, 150mil
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 22 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 23 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 symbol min. typ. max. a 1.35 - 1.75 a1 0.10 - 0.25 a2 1.25 - 1.65 b 0.31 - 0.51 b1 0.28 - 0.48 c 0.17 - 0.25 c1 0.17 - 0.23 d 9.90 bsc. e 6.00 bsc. e1 3.90 bsc. e 1.27 bsc. l 0.40 - 1.27 l1 1.04 ref. l2 0.25 bsc. r 0.07 - - r1 0.07 - h 0.25 - 0.50 0 - 8 1 5 - 15 2 0 - - notes: 1. dimensioning and toleranc ing per ansi y 14.5m-1994 2. controlling dimension: millimeters. 3. dimension d does not include mold flash protrusions or gate burrs. mold flash, protrusions or gate burrs shall not exceed 0.15 mm (0.006 in ) per end. dimension e1 does not include interlead flash or protrusion. interlead flash or protrusion shall not exceed 0.25mm per side. d and e1 dimensions are determined at datum h. 4. the package top may be smaller than t he package bottom. dimensions d and e1 are determined at the outermost extremes of the plastic body exclusive of mold flash, tie bar burrs, gate burrs and interlead flash, but including any mismatch between the top and bottom of the plastic body. 5. datums a & b to be determined at datum h. 6. n is the number of terminal positions. (n=16) 7. the dimensions apply to the flat section of the lead between 0.10 to 0.25mm from the lead tip. 8. dimension ?b? does not include dambar protru sion. allowable dambar protrusion shall be 0.10mm total in excess of the ?b? dimension at maximum material conditi on. the dambar cannot be located on the lower radius of the foot. 9. this chamfer feature is optional. if it is not present, then a pin 1 identif ier must be located within the index area indicated. 10. refer to jedec ms-012, variation ac. jedec is the registered trademark of je dec solid state technology association.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 24 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 16 pins, ssop, 150mil
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 25 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 26 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 symbol min. nom. max. a 0.053 - 0.069 a1 0.004 - 0.010 a2 0.049 - 0.065 b 0.008 - 0.012 b1 0.008 0.010 0.011 c 0.006 - 0.010 c1 0.006 0.008 0.009 d 0.193 bsc e 0.236 bsc e1 0.154 bsc e 0.025 bsc l 0.016 - 0.050 l1 0.041 ref l2 0.010 bsc r 0.003 - - r1 0.003 - - 0 - 8 1 5 - 15 2 0 - - aaa 0.004 bbb 0.008 ccc 0.004 ddd 0.007 eee 0.004
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw pt4316 v1.6 - 27 - august, 2007 low power 315/433 mhz ook/ask superheterodyne receiver with saw-based oscillator pt4316 notes: 1. dimensioning and toleranci ng per ansi y14.5m-1982. 2. dimensions in inches (angles in degrees) 3. dimension d does not include mold fl ash, protrusions or gate burrs. mold flash, protrusions or gate burrs shall not exceed 0.006? per end. dim ension e1 does not include interlead flash or protrusions. interlead flash or protrusions shall not exceed ?0.006? per side. d1 and e1 dimensions are determined at dutum h. 4. the package top may be smaller than the package bottom. dimensions d and e1 are determined at the outermost extremes of the plastic body ex clusive of mold flash, tie bar burrs, gate burrs and interlead flash, but including any mismat ch between the top and bottom of the plastic. 5. datums a and b to be determined at datum h. 6. n is the maximum number of terminal position. (n=16) 7. the dimensions apply to the flat section of t he lead between 0.004 to 0.010 in ches from the lead tip. 8. dimension b does not in clude dambar protrusion. allowable dambar protrusion shall be 0.004? total in excess of b dimension at maximum materi al condition. the dambar can not be located on the lower radius of the foot. 9. refer to jedec mo-137 variation ab. jedec is the registered trademark of je dec solid state technology association

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