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d a t a sh eet product speci?cation supersedes data of september 1993 file under integrated circuits, ic16 1997 apr 16 integrated circuits pcf1179c 4-digit duplex lcd car clock
1997 apr 16 2 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c features internal voltage regulator is electrically programmable for various lcd voltages time calibration is electrically programmable (no trimming capacitor required) lcd voltage adjusts with temperature for good contrast 4.19 mhz oscillator 12-hour or 24-hour mode operating ambient temperature: - 40 to +85 c 28-lead plastic smd (so28) 4 hz set mode. general description the pcf1179c is a single chip, 4.19 mhz cmos car clock circuit providing hours, minutes and seconds functions. it is designed to drive a 4-digit duplex liquid crystal display (lcd). two external single-pole, single-throw switches will accomplish all time setting functions. time calibration and voltage regulator are electrically programmable via an on-chip eeprom. the circuit is battery-operated via an internal voltage regulator and an external resistor. ordering information notes 1. see fig.1 and chapter package outline for pin layout and package details. 2. see chapter chip dimensions and bonding pad locations for pad layout and package details. type number package name description version pcf1179ct so28 plastic small outline package; 28 leads; body width 7.5 mm (1) sot136-1 pcf1179cu - uncased chip in tray (2) - pcf1179cu/10 - chip-on-?lm frame carrier (ffc) (2) -
1997 apr 16 3 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c pinning symbol pin description s1 1 hour adjustment input data 2 eeprom data input osc in 3 oscillator input osc out 4 oscillator output v ss 5 negative supply voltage mode 6 12/24-hour mode select input v pp 7 programming voltage input ts 8 test speed-up mode input enable 9 enable input (for s1 and s2) v dd 10 positive supply voltage flash 11 colon option input sel 12 eeprom select input s2 13 minute adjustment input b4/c4 14 segment driver g4/d4 15 segment driver f4/e4 16 segment driver b3/c3 17 segment driver g3/ad3 18 segment driver f3/e3 19 segment driver a4/col 20 segment driver b2/c2 21 segment driver g2/d2 22 segment driver f2/e2 23 segment driver b1/c1 24 segment driver a2/adeg1 25 segment driver am/pm 26 segment driver bp2 27 backplane 2 bp1 28 backplane 1 fig.1 pin configuration, pcf1179ct, (so28). 1 2 3 4 5 6 7 8 9 10 11 12 13 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 pcf1179ct s1 data osc out ss mode pp ts enable dd flash sel s2 b4/c4 v v v osc in g4/d4 f4/e4 b3/c3 g3/ad3 f3/e3 a4/col b2/c2 g2/d2 f2/e2 b1/c1 a2/adeg1 am/pm bp2 bp1 msb231
1997 apr 16 4 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c functional description and testing outputs the circuit outputs 1 : 2 multiplexed data (duplex) to the lcd. generation of bp1 and bp2 (three-level backplane signals) and the output signals are shown in fig.4. the average voltages across the segments are: 1. v on(rms) = 0.79 v dd 2. v off(rms) = 0.35 v dd . fig.2 segment designation of lcd. mlb251 a2 g2 d2 f2 e2 b2 c2 col a3 g3 d3 f3 e3 b3 c3 a4 g4 d4 f4 e4 b4 c4 am pm a1 g1 d1 e1 b1 c1 fig.3 typical displays. a. 12-hour mode. b. 24-hour mode. pm time msa993 (a) msa994 time (b) fig.4 backplane and output signals. msb226 v dd v dd /2 0 bp1 v dd v dd /2 0 bp2 v dd 0 segment 1 segment 2 on on v dd 0 off on v dd 0 on off v dd 0 off off 15.625 ms
1997 apr 16 5 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c lcd voltage (see fig.5) the adjustable voltage regulator controls the supply voltage (see section lcd voltage programming) in relation to temperature for good contrast, for example when v dd = 4.5 v at +25 c, then: v dd = 3 to 4 v at +85 c. v dd = 5 to 6 v at - 40 c. fig.5 regulated voltage as a function of temperature (typical). (1) programmed to 4.0 v at 25 c (value within the specified operating range). (2) programmed to 4.5 v at 25 c (value within the specified operating range). (3) programmed to 5.0 v at 25 c (value within the specified operating range). 40 0 40 120 - 8 - 6 - 2 0 - 4 msa995 80 t ( c) o v ss (v) (2) (1) (3)
1997 apr 16 6 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c 12/24-hour mode operation in 12-hour or 24-hour mode is selected by connecting mode to v dd or v ss respectively. if mode is left open-circuit and a reset occurs, the mode will change from 12-hour to 24-hour mode or vice versa. power-on after connecting the supply, the start-up mode is: mode connected to v dd : 12-hour mode, 1:00 am. mode connected to v ss : 24-hour mode, 0:00. mode left open-circuit: 24-hour mode, 0:00 or 1:00. colon if flash is connected to v dd the colon pulses at 1 hz. if flash is connected to v ss the colon is static. time setting switch inputs s1 and s2 have a pull-up resistor to facilitate the use of single-pole, single-throw contacts. a debounce circuit is incorporated to protect against contact bounce and parasitic voltages. set enable inputs s1 and s2 are enabled by connecting enable to v dd or disabled by connecting to v ss . set hours when s1 is connected to v ss the hours displayed advances by one and after one second continues with four advances per second until s1 is released (auto-increment). an overflow in the hour counter must not have an influence on the minute counter. set minutes when s2 is connected to v ss the time displayed in minutes advances by one and after one second continues with four advances per second until s2 is released (auto-increment). in addition to minute correction, the seconds counter is reset to zero. an overflow in the minute counter must not have an influence on the hour counter. segment test/reset when s1 and s2 are connected to v ss , all lcd segments are switched on. releasing switches s1 and s2 resets the display. no reset occurs when data is connected to v ss (overlapping s1 and s2). test mode when ts is connected to v dd , the device is in normal operating mode. when connecting ts to v ss all counters (seconds, minutes and hours) are stopped, allowing quick testing of the display via s1 and s2 (debounce and auto-increment times are 64 times faster). ts has a pull-up resistor but for reasons of safety it should be connected to v dd . eeprom v pp has a pull-up resistor but for reasons of safety it should be connected to v dd . lcd voltage programming to enable lcd voltage programming, sel is set to open-circuit and a level of v dd - 5 v is applied to v pp (see fig.6). the first pulse (t e ) applied to the data input clears the eeprom to give the lowest voltage output. further pulses (t l ) will increment the output voltage by steps of typically 150 mv (t amb =25 c). for programming, measure v dd - v ss and apply a store pulse (t w ) when the required value is reached. if the maximum number of steps (n = 31) is reached and an additional pulse is applied the voltage will return to the lowest value. time calibration to compensate for the tolerance in the quartz crystal frequency which has been positively offset (nominal deviation +60 10 - 6 by capacitors at the oscillator input and output, a number (n) of 262144 hz pulses are inhibited every second of operation.
1997 apr 16 7 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c the number (n) is stored in a non-volatile memory which is achieved by the following steps (see fig.6): 1. set sel to v ss and a level of v dd - 5 v to v pp 2. the quartz-frequency deviation d f/f is measured and (n) is calculated (see table 1) 3. a first pulse t e is applied to the data input clears the eeprom to give the highest backplane frequency 4. the calculated pulses (n) are entered in (t h , t l ). if the maximum backplane period is reached and an additional pulse is applied the period will return to the lowest value. 5. the backplane period is controlled and when correct fixed by applying the store pulse t w 6. release sel and v pp . table 1 time calibration ( d t = 7.63 m s; sel at v ss ) oscillator-frequency deviation d f/f ( 10 - 6 ) number of pulses (n) backplane period (ms) 0 0 15.625 +3.8 1 15.633 +7.6 2 15.641 +11.4 3 15.648 ... ... ... +117.8 31 15.861
1997 apr 16 8 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c fig.6 programming diagram. msb232 pcf1179c sel v dd osc out osc in v ss 12 v r 6.8 k w c 47 m f ext v ss data v pp pulse generators 0 v t , t = 4 to 6 ms w e t = 1 m s h t = 1 to 1.5 m s l t e t h t l t h t l v dd t h t w n clears cells incrementing counters store pulse 5 v v dd data v pp v dd 5 v v dd 50 m s 50 m s 50 m s 50 m s
1997 apr 16 9 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c limiting values in accordance with the absolute maximum rating system (iec 134). note 1. connecting the supply voltage with reverse polarity, will not harm the circuit, provided the current is limited to 10 ma by an external resistor. handling inputs and outputs are protected against electrostatic discharges in normal handling. however, to be totally safe, it is advisable to take handling precautions appropriate to handling mos devices. advice can be found in data handbook ic16, general, handling mos devices . symbol parameter conditions min. max. unit v dd supply voltage with respect to v ss - 8v i dd supply current v ss = 0 v; note 1 - 3ma v i voltage range all pins except v pp and data - 0.3 v dd + 0.3 v pins v pp and data - 3v dd + 0.3 v t amb operating ambient temperature - 40 +85 c t stg storage temperature - 55 +125 c
1997 apr 16 10 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c characteristics v dd =3to6v; v ss =0v; t amb = - 40 to +85 c; crystal: f = 4.194304 mhz; r s =50 w ; c l = 12 pf; maximum frequency tolerance = 30 10 - 6 ; unless otherwise speci?ed. note 1. a suitable resistor (r) must be selected (example): a) v dd = 5 v; r max. (12 v - 5 v)/700 m a = 10 k w . b) v dd = 5 v; r typ. (12 v - 5 v)/900 m a = 7.8 k w (more reserve). c) i dd must not exceed 3 ma. symbol parameter conditions min. typ. max. unit supply v dd supply voltage voltage regulator programmed to 4.5 v at t amb =25 c 3 - 6v d v dd supply voltage variation s1 or s2 closed -- 50 mv tc supply voltage variation due to temperature -- 0.35 - %/k v dd = 4.5 v -- 16 - mv/k i dd supply current note 1 700 950 -m a c ext capacitance external capacitor 47 --m f oscillator t osc start time -- 200 ms d f/f frequency deviation nominal n = 0 0 60 10 - 6 110 10 - 6 d f/f frequency stability d v dd = 100 mv -- 1 10 - 6 r fb feedback resistance 300 1000 3000 k w c i input capacitance - 16 - pf c o output capacitance - 27 - pf inputs r o pull-up resistance s1, s2, ts, sel and data 45 90 180 k w r o pull-up/pull-down resistance mode 100 300 1000 k w i il leakage current enable, flash -- 2 m a t d debounce time s1 and s2 only 30 65 100 ms v pp programming voltage i o2 output current v pp =v dd - 5v 70 - 700 m a during programming - 500 -m a backplane (high and low levels) r bp output resistance 100 m a -- 3k w segment r seg output resistance 100 m a -- 5k w lcd v offset(dc) dc offset voltage 200 k w /1 nf -- 50 mv
1997 apr 16 11 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c chip dimensions and bonding pad locations fig.7 bonding pad locations, pcf1179cu; 28 terminals. chip area: 5.61 mm 2 . bonding pad dimensions: 110 m m 110 m m. chip thickness: 381 25 m m. msb233 0 0 v ss mode v pp ts enable v dd 1.92 mm flash x sel s2 b4/c4 g4/d4 f4/e4 b3/c3 g3/ad3 pcf1179cu osc out osc in data s1 bp1 bp2 am/pm a2/adeg1 2.92 mm b1/c1 y f2/e2 g2/d2 b2/c2 a4/col f3/e3
1997 apr 16 12 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c table 2 bonding pad locations (dimensions in m m) all x/y coordinates are referenced to the bottom left pad (v ss ), see fig.7. pad x y pad x y s1 - 138 881 g4/d4 1438 1588 data - 138 639 f4/e4 1438 1808 osc in - 138 408 b3/c3 1438 2028 osc out - 138 188 g3/ad3 1438 2248 v ss 0 0 f3/e3 1400 2476 mode 383 0 a4/col 1000 2476 v pp 583 0 b2/c2 800 2476 ts 846 0 g2/d2 600 2476 enable 1046 0 f2/e2 400 2476 v dd 1352 0 b1/c1 0 2476 flash 1438 188 a2/adeg1 - 138 2248 sel 1438 408 am/pm - 138 2028 s2 1438 628 bp2 - 138 1808 b4/c4 1438 848 bp1 - 138 1588 chip corner (max. value) - 355 - 175
1997 apr 16 13 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c application information fig.8 typical application diagram. (1) to be mounted close to the ic. a ndbook, full pagewidth msb234 osc in osc out 3 4 oscillator am/pm counter hours counter minutes counter seconds counter adjustable divider eeprom control logic voltage regulator 7 v pp 11 flash 8ts 9 enable s1 s2 1 data sel 12 2 13 6 5 v ss mode decoder decoder bp1 28 26 14 segment drivers to lcd pcf1179c 12 v 6.8 k w i dd (1) 100 nf v dd c ext 47 m f bp2 27 10
1997 apr 16 14 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c package outline unit a max. a 1 a 2 a 3 b p cd (1) e (1) (1) eh e ll p q z y w v q references outline version european projection issue date iec jedec eiaj mm inches 2.65 0.30 0.10 2.45 2.25 0.49 0.36 0.32 0.23 18.1 17.7 7.6 7.4 1.27 10.65 10.00 1.1 1.0 0.9 0.4 8 0 o o 0.25 0.1 dimensions (inch dimensions are derived from the original mm dimensions) note 1. plastic or metal protrusions of 0.15 mm maximum per side are not included. 1.1 0.4 sot136-1 91-08-13 95-01-24 x 14 28 w m q a a 1 a 2 b p d h e l p q detail x e z c l v m a e 15 1 (a ) 3 a y 0.25 075e06 ms-013ae pin 1 index 0.10 0.012 0.004 0.096 0.089 0.019 0.014 0.013 0.009 0.71 0.69 0.30 0.29 0.050 1.4 0.055 0.42 0.39 0.043 0.039 0.035 0.016 0.01 0.25 0.01 0.004 0.043 0.016 0.01 0 5 10 mm scale so28: plastic small outline package; 28 leads; body width 7.5 mm sot136-1
1997 apr 16 15 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c soldering introduction there is no soldering method that is ideal for all ic packages. wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. however, wave soldering is not always suitable for surface mounted ics, or for printed-circuits with high population densities. in these situations reflow soldering is often used. this text gives a very brief insight to a complex technology. a more in-depth account of soldering ics can be found in our ic package databook (order code 9398 652 90011). re?ow soldering reflow soldering techniques are suitable for all so packages. reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. several techniques exist for reflowing; for example, thermal conduction by heated belt. dwell times vary between 50 and 300 seconds depending on heating method. typical reflow temperatures range from 215 to 250 c. preheating is necessary to dry the paste and evaporate the binding agent. preheating duration: 45 minutes at 45 c. wave soldering wave soldering techniques can be used for all so packages if the following conditions are observed: a double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used. the longitudinal axis of the package footprint must be parallel to the solder flow. the package footprint must incorporate solder thieves at the downstream end. during placement and before soldering, the package must be fixed with a droplet of adhesive. the adhesive can be applied by screen printing, pin transfer or syringe dispensing. the package can be soldered after the adhesive is cured. maximum permissible solder temperature is 260 c, and maximum duration of package immersion in solder is 10 seconds, if cooled to less than 150 c within 6 seconds. typical dwell time is 4 seconds at 250 c. a mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. repairing soldered joints fix the component by first soldering two diagonally- opposite end leads. use only a low voltage soldering iron (less than 24 v) applied to the flat part of the lead. contact time must be limited to 10 seconds at up to 300 c. when using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 c.
1997 apr 16 16 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c definitions life support applications these products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify philips for any damages resulting from such improper use or sale. data sheet status objective speci?cation this data sheet contains target or goal speci?cations for product development. preliminary speci?cation this data sheet contains preliminary data; supplementary data may be published later. product speci?cation this data sheet contains ?nal product speci?cations. limiting values limiting values given are in accordance with the absolute maximum rating system (iec 134). stress above one or more of the limiting values may cause permanent damage to the device. these are stress ratings only and operation of the device at these or at any other conditions above those given in the characteristics sections of the speci?cation is not implied. exposure to limiting values for extended periods may affect device reliability. application information where application information is given, it is advisory and does not form part of the speci?cation.
1997 apr 16 17 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c notes
1997 apr 16 18 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c notes
1997 apr 16 19 philips semiconductors product speci?cation 4-digit duplex lcd car clock pcf1179c notes
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