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tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 1 - april, 2006 remote control decoder ic PT2294 description PT2294 is a remote control decoder paired with pt2264 utilizing cmos technology. it has 12 bits of tri-state address pins providing a maximum of 531,441 (or 3 12 ) address codes; thereby drastically reducing any code collision and unauthorized code sc anning possibilities. PT2294 is available in several options to suit every application needs: variable number of data output pins, latch or momentary output type. when paired with pt2264, this encoder/decoder (p t2264 / PT2294) pair can operate at very wide temperature range (-40 ~ +85 ). see also pt2264 product specification features. thus, this very important feature enables your en coder/decoder to operate under the wo rst environmental condition. features ? cmos technology ? low power consumption ? very high noise immunity ? up to 12 tri-state code address pins ? up to 4 data pins ? operating voltage: vcc=2.2 ~ 7v ? single resistor oscillator ? latch or momentary output type applications ? remote control fan ? home security/automation system ? remote control toys ? remote control for industrial use ? remote control for door bell
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 2 - april, 2006 remote control decoder ic PT2294 block diagram tri-state address data detect a0 a1 a2 a3 a4 a5 a6 a7 a8/d3 a9/d2 a10/d1 a11/d0 system timing control logic computer logic osc output logic data detect sync detect osc1 osc2 vt din
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 3 - april, 2006 remote control decoder ic PT2294 pin configuration a0 a1 a2 a3 a4 a5 a6 a7 vcc vt osc1 osc2 din a11/d0 a10/d1 a9/d2 vss a8/d3 1 3 2 4 5 6 7 8 9 18 16 17 15 14 13 12 11 10 p2294 t
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 4 - april, 2006 remote control decoder ic PT2294 pin description pin name i/o description pin no. a0 ~ a7 i code address pin nos. 0 ~ 7. these eight tri-state pins are detected by PT2294 to determine the encoded waveform bit 0 ~ bit 9. each pin can be set to ?0?, ?1?, or ?f? (floating). 1 ~ 8 a8/d3 ~ a11/d0 i/o code address pin nos. 8 ~ 11/data pin nos. 0 ~ 3. these four pins are used as hi gher address input bits or data output pins depending on the versi on (type) of PT2294 used. when used as address inputs, thes e pins are tri-state input pins and each pin can be set to ?0?, ?1?, or ?f? (floating). when used as output pins, these pi ns are driven to vcc if (1) the address decoded from the waveform that was received matches the address setting at the address input pins, and (2) the corresponding data bits received is a ?1? bit. otherwise, they are driven to vss. 10 ~ 13 din i data input pin. the encoded waveform received is serially fed to PT2294 at this pin. 14 osc1 i oscillator pin no.1 16 osc2 o oscillator pin no. 2 a resistor connected between these two pins determines the fundamental frequency of PT2294. 15 vt o valid transmission. active high signal. vt in high state signifies that PT2294 receives valid transmission waveform. 17 vcc - positive power supply 18 vss - negative power supply 9
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 5 - april, 2006 remote control decoder ic PT2294 function description PT2294 decodes the waveform received and fed into t he din pin. the waveform is decoded into code word that contains the address, data and sync bi ts. the decoded address bits are compared with the address set at the address input pi ns. if both addresses match for 2 consecutive code words, PT2294 drives -- (1) the data output pin(s) whose corres ponding data bit(s) is then decoded to be a ?1? bit, and (2) the vt output -- to high voltage (high state). code bits a code bit is the basic component of the encoded wa veform, and can be classified as either an ad (address/data) bit or a sync (synchronous) bit. address/data (ad) bit waveform an ad bit can be designated as bit ?0?, ?1? or ?f?, if it is in low, high or floati ng state respectively. one bit waveform consists of 2 pulse cycles. each pulse cycle has 16 oscillating time periods. for further details, please refer to the diagram below: 1 bit = 32 4 12 4 osc bit 0 bit 1 bit f floating where: =oscillating clock period bit ?f? is only available for address bits synchronous (sync.) bit waveform the synchronous bit waveform is 4 bits long with 1/ 8 bit width pulse. please refer to the diagram below: 1/8 bit w idth=4 4 bit width=128 note: 1 bit = 32
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 6 - april, 2006 remote control decoder ic PT2294 code word a group of code bits is called a c ode word. a code word consists of 12 ad bits followed by one sync bit. the 12 ad bits are interpreted as either address or data bits depending on the PT2294 version used. please refer to the diagrams below: PT2294: a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a11 sync PT2294?m4/l4: a0 a1 a2 a3 a4 a5 a6 a7 d3 d2 d1 d0 sync one complete code word single resistor oscillator the built-in oscillator circuitry of PT2294 allows a precision oscillator to be constructed with only an external resistor. for the PT2294 to decode correctly the waveform that was received, the oscillator frequency of PT2294 must be 1/16 ~ 4 (or 2 to 30) time s that of the transmitting pt2264. it is a good practice to center the PT2294 oscillator frequency in this window to gain best window margin at both sides. the typical oscillator with various resist or values are shown below for pt2264 and PT2294. 100 10 1 khz 3 6 9 12 15 v o l t a g e r = 510 k r = 1 m r = 2 m r = 3.3 m r = 4.7 m pt2264 encoder osc frequency
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 7 - april, 2006 remote control decoder ic PT2294 PT2294 decoder osc frequency 0 20 40 60 80 100 120 140 160 180 2 4 6 8 10 12 voltage (v) frequency (khz) rosc =510k ? rosc=620k ? rosc=1.0m ? rosc=1.2m ? rosc=2.2 m ? suggested oscillator resistor values are shown below. pt2264 PT2294 1.2m ? 120k ? 1.5m ? 160k ? 3.3m ? 390k ? vaild transmission when PT2294 receives a transmission code word, it initially checks whether this is a valid transmission. for a transmission to be valid, (1) it must be a co mplete code word, and (2) the address bits must match the address setting at the address pins. a fter two consecutive valid transmissions, PT2294 (1) drives the data pins according to the data bits rece ived, and (2) raises vt to high voltage (high state). the timings are shown in the following diagram. 1st word 2nd word sync bit sync bit din data pins (momentary) vt 2tc note: tc=width of 1 code word
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 8 - april, 2006 remote control decoder ic PT2294 latch or momentary data output type PT2294 uses either the latch or the momentar y data output type depending on the PT2294 version used. the latch type (PT2294-lx) activates the dat a out during transmission and this data is sustained in the memory until another data is inputted or entered. a momentar y type (PT2294-mx), on the other hand, activates the data out only during transmission. in the momentary type, the data does not remain in the memory after the transmission is comp leted. please refer to the diagram below: data words (x) data words (y) 2tc 2tc 2tc 2tc data output x data output y data output x data output y din data pins (momentary) data pins (latch) vt note: tc=width of 1 code word
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 9 - april, 2006 remote control decoder ic PT2294 operation flowchart decoder wothout data output pin 1. when power is turned on, pt 2294 activates the stand-by mode. 2. it then searches for signals. if there is no signal received, it remains in the stand-by mode; otherwise, the address bits received are co mpared with the address conf iguration of the pins. 3. the vt goes high signifying the validation of tr ansmission only when there are two (2) continuous frames that contain matched address bits; ot herwise, vt will not be activated and the stand-by mode remains active. 4. then, the address bits are again checked. two continuous mismatches of the address bits would disable the vt and make the stand-by mode acti ve; otherwise, the address bits are continuously checked. address bits match? address bits match? address still match? address still match? signal in? power on stand-by mode activate vt disable vt yes yes yes no yes yes no no no
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 10 - april, 2006 remote control decoder ic PT2294 decoder with data output pins 1. when power is turned on, PT2294 activates the stand-by mode. 2. it then searches for signals. if there is no signal received, it remains in the stand-by mode; otherwise, the address bits are compar ed with the address confi guration of the pins. whenever the address bits in a frame match wit h that of the address co nfiguration of the pin, the data bits are stored into the memory. w hen the result is a match, it then undergoes another matching (address bits in the frame vs. addre ss configuration of the pin) and storing (data bits stored in the memory) process. when this ic finds two (2) continuous and i dentical data having the same address bits, the data output(s) is activated and the vt is enabled. the vt is disabled when there are 2 continuous mismatched addresses. for the momentary type, the data output is reset; while for the latch type, the data output is sustained.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 11 - april, 2006 remote control decoder ic PT2294 address bits match? match previous data? address still match? address still match? signal in? power on stand-by mode data bits output & activate vt disable vt & reset output data (for momentary type) yes yes yes no yes yes no no store data bits address bits match? match previous data? yes yes store data bits no momentary type? disable vt & sustain output data (for latch type) no no no yes no
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 12 - april, 2006 remote control decoder ic PT2294 absolute maximum ratings parameter symbol conditions ratings unit operating temperature topr -40 ~ +85 storage temperature tstg -65 ~ +150 dc electrical characteristics parameter symbol conditions min. typ. max. unit supply voltage vcc 2.2 5 7 v standby current isb vcc=5v, din=?l? osc stops a0 ~ a11 open 0.1 1 a d0, d1, d2, d3 output driving current ioh vcc=5v voh=3.5v 3 5 ma d0, d1, d2, d3 output sinking current iol vcc=5v vol=1.5v -2 -4 ma din high level input voltage vih vcc 0.7vcc vcc v din low level input voltage vil vcc 0 0.3vcc v vt output driving current ioh vcc=5v voh=3.5v 3 6 ma
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 13 - april, 2006 remote control decoder ic PT2294 application circuit no data rf application pin1~8, pin 10~13 address datas must be paired with pt2264. a0 a1 a2 a3 a4 a5 a6 a7 vcc vt osc1 osc2 din a11/d0 a10/d1 a9/d2 vss a8/d3 1 3 2 4 5 6 7 8 9 18 16 17 15 14 13 12 11 10 p 2294 t rf receiver v cc rosc 560k led 1 notes: 1. suggested oscillator resistor val ues (rosc), please refer to page 7. 2. the led is indicated when PT2294 receives valid transmission waveform.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 14 - april, 2006 remote control decoder ic PT2294 2 data rf application pin1~8, pin 10, 11 address datas must be paired with pt2264. a0 a1 a2 a3 a4 a5 a6 a7 vcc vt osc1 osc2 din a11/d0 a10/d1 a9/d2 vss a8/d3 1 3 2 4 5 6 7 8 9 18 16 17 15 14 13 12 11 10 p 2294m4/l4 t rf receiver v cc rosc 560 x 4 led 1 led 2 led 3 led 4 led 5 560 notes: 1. suggested oscillator resistor val ues (rosc), please refer to page 7. 2. the led1~5 are indicated when PT2294 receives valid transmission waveform.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 15 - april, 2006 remote control decoder ic PT2294 order information valid part number package top code PT2294 18 pins, dip, 300mil PT2294 PT2294l4 18 pins, dip, 300mil PT2294l4 PT2294m4 18 pins, dip, 300mil PT2294m4 PT2294-s 18 pins, sop, 300mil PT2294-s PT2294l4-s 18 pins, sop, 300mil PT2294l4-s PT2294m4-s 18 pins, sop, 300mil PT2294m4-s PT2294 (l) 18 pins, dip, 300mil PT2294 PT2294l4 (l) 18 pins, dip, 300mil PT2294l4 PT2294m4 (l) 18 pins, dip, 300mil PT2294m4 PT2294-s (l) 18 pins, sop, 300mil PT2294-s PT2294l4-s (l) 18 pins, sop, 300mil PT2294l4-s PT2294m4-s (l) 18 pins, sop, 300mil PT2294m4-s notes: 1. (l), (c) or (s) = lead free. 2. the lead free mark is put in front of the date code.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 16 - april, 2006 remote control decoder ic PT2294 package information 18 pins, dip, 300mil
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 17 - april, 2006 remote control decoder ic PT2294 symbol min. nom. max. a - - 0.210 a1 0.150 - - a2 0.115 0.130 0.195 b 0.014 0.018 0.022 b1 0.014 0.018 0.020 b2 0.045 0.060 0.070 b3 0.030 0.039 0.045 c 0.008 0.010 0.014 d 0.880 0.900 0.920 d1 0.005 - - e 0.300 0.310 0.325 e1 0.240 0.250 0.280 e 0.100 basic ea 0.300 basic eb - - 0.430 ec 0.000 - 0.600 l 0.115 0.130 0.150 notes: 1. all dimensioning are in inches. 2. dimensioning and toleranci ng per ansi y14.5m-1982. 3. dimension?a?,?a1?and ?l? ar e measured with package seated in jedec seating plane gauge gs-3. 4. ?d?, ?d1? and ?e1? dimensions do not include mold flash or protrusions. mold flash or protrusions shall not exceed 0.010 inch. 5. ?e? and ?ea? measured with the leads constrained to be perpendicular to datum-c- . 6. ?eb? and ?ec? are measured at the lead tips with the leads unconstrained. 7. ?n? is the number of terminal position (n=18). 8. pointed or rounded lead tips ar e preferred to ease insertion. 9. ?b2? and ?b3? maximum dimensions are not in clude dambar protrusions. damber protrusions shall not exceed 0.010 inch (0.25mm) 10. distance between leads including damber protrusions to be 0.005 inch minimum. 11. datum plane -h- coincident with the bottom of lead, where lead exits body. 12. refer to jedec ms-001, variation ac jedec is the trademark of jedec solid state technology association.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 18 - april, 2006 remote control decoder ic PT2294 18pins sop, 300mil symbol min. nom. max. a 2.35 - 2.65 a1 0.10 - 0.30 b 0.33 - 0.51 c 0.23 - 0.32 d 11.35 - 11.75 e 7.40 - 7.60 e 1.27 basic h 10.00 - 10.65 h 0.25 - 0.75 l 0.40 - 1.27 0 - 8
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2294 v1.2 - 19 - april, 2006 remote control decoder ic PT2294 notes: 1. dimensioning and toleranc ing per ansi y14.5-1982. 2. dimension ?d? does not include mold flash, protrusions or gate burrs. mo ld flash. protrusion or gate burrs shall not exceed 0.15mm (0.006 in) per side. 3. dimension ?e? does not include interlead flash or prot rusions. interlead flash or protrusions shall not exceed 0.25mm (0.010 in) per side. 4. the chamfer on the body is optional. it is not pres ent, a visual index feature must be located within the crosshatched area. 5. ?l? is the length of the terminal for soldering to substrate. 6. ?n? is the number of terminal positions. (n=18) 7. the lead width ?b? as measured 0.36mm (0.014 in ) or greater above the seating plane, shall not exceed a maximum value of 0.61mm (0.24 in) 8. controlling dimension: millimeter. 9. refer to jedec ms-013 variation ab. jedec is the trademark of jedec solid state technology association.

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