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INTEGRATED CIRCUITS
DATA SHEET
PCA16xx series 32 kHz watch circuits with EEPROM
Product specification Supersedes data of 1997 Apr 21 File under Integrated Circuits, IC16 1997 Dec 12
Philips Semiconductors
Product specification
32 kHz watch circuits with EEPROM
FEATURES * 32 kHz oscillator, amplitude regulated with excellent frequency stability * High immunity of the oscillator to leakage currents * Time calibration electrically programmable and reprogrammable (via EEPROM) * A quartz crystal is the only external component required * Very low current consumption; typically 170 nA * Detector for silver-oxide or lithium battery voltage levels * Indication for battery end-of-life ORDERING INFORMATION TYPE NUMBER PCA1601U/10 PCA1602T PCA1603U/7 PCA1604U PCA1604U/10 PCA1605U/7 PCA1606U/10 PCA1607U PCA1608U PCA1611U PCA1621U/7 PCA1621U/10 PCA1622U PCA1623U/7 PCA1624U PCA1625U/7 PCA1626U PCA1627U/7 PCA1628U PCA1629U/7 Note PACKAGE(1) NAME - PMFP8 - - - - - - - - - - - - - - - - - - chip on foil plastic micro flat package; 8 leads (straight) chip with bumps on tape chip in tray chip on foil chip with bumps on tape chip on foil chip in tray chip in tray chip in tray chip with bumps on tape chip on foil chip in tray chip with bumps on tape chip in tray chip with bumps on tape chip in tray chip with bumps on tape chip in tray chip with bumps on tape DESCRIPTION
PCA16xx series
* Stop function for accurate timing * Power-on reset for fast testing * Various test modes for testing the mechanical parts of the watch and the IC. GENERAL DESCRIPTION The PCA16xx series devices are CMOS integrated circuits specially suited for battery-operated, quartz-crystal-controlled wrist-watches, with bipolar stepping motors.
VERSION - SOT144-1 - - - - - - - - - - - - - - - - - -
1. Figure 1 and Chapter "Package outline" show details of standard package, available for specified devices and for large orders only. Chapter "Chip dimensions and bonding pad locations" shows exact pad locations for other delivery formats.
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Philips Semiconductors
Product specification
32 kHz watch circuits with EEPROM
PINNING SYMBOL VSS TEST OSC IN OSC OUT VDD M1 M2 RESET PIN 1 2 3 4 5 6 7 8 DESCRIPTION ground (0 V) test output oscillator input oscillator output positive supply voltage motor 1 output motor 2 output reset input Customer testing
OSC IN OSC OUT 3 4 VSS TEST 1 2
PCA16xx series
8 7
RESET M2 M1 V DD
PCA16xxT
6 5
MSA973
Fig.1 Pin configuration, PCA16xxT, (PMFP8).
FUNCTIONAL DESCRIPTION AND TESTING Motor pulse The motor pulse width (tP) and the cycle times (tT) are given in Chapter "Available types". Voltage level detector The supply voltage is compared with the internal voltage reference VLIT and VEOL every minute. The first voltage level detection is carried out 30 ms after a RESET. Lithium mode If a lithium voltage is detected (VDD VLIT), the circuit will operate in the lithium mode. The motor pulse will be produced with a 75% duty factor. Silver-oxide mode If the voltage level detected is between VLIT and VEOL, the circuit will operate in silver-oxide mode. Battery end-of-life(1) If the battery end-of-life is detected (VDD VEOL), the motor pulse will be produced without chopping. To indicate this condition, bursts of 4 pulses are produced every 4 s. Power-on reset For correct operation of the Power-on reset the rise time of VDD from 0 V to 2.1 V should be less than 0.1 ms. All resettable flip-flops are reset. Additionally the polarity of the first motor pulse is positive: VM1 - VM2 0 V.
An output frequency of 32 Hz is provided at RESET (pin 8) to be used for exact frequency measurement. Every minute a jitter occurs as a result of time calibration, which occurs 90 to 150 ms after disconnecting the RESET from VDD. Connecting the RESET to VDD stops the motor pulses leaving them in a HIGH impedance 3-state condition and a 32 Hz signal without jitter is produced at the TEST pin. A debounce circuit protects accidental stoppages due to mechanical shock to the watch (tDEB = 14.7 to 123.2 ms). Connecting RESET to VSS activates Tests 1 and 2 and disables the time calibration. Test 1, VDD > VEOL. Normal function takes place except the voltage detection cycle (tV) is 125 ms and the cycle time tT1 is 31.25 ms. At pin TEST a minute signal is available at 8192 times its normal frequency. Test 2(2), VDD < VEOL. The voltage detection cycle (tV) is 31.25 ms and the motor pulse period (tT2) = 31.25 ms. Test and reset mode are terminated by disconnecting the RESET pin. Test 3, VDD > 5.1 V. Motor pulses with a time period of tT3 = 31.25 ms and n x 122 s are produced to check the contents of the EEPROM. At pin TEST the motor pulse period signal (tT) is available at 1024 times its normal frequency. The circuit returns to normal operation when VDD < 2.5 V between two motor pulses.
(2) Only applicable for types with the battery end-of-life detector.
(1) Only available for types with a 1 s motor pulse.
1997 Dec 12
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Philips Semiconductors
Product specification
32 kHz watch circuits with EEPROM
Time calibration Taking a normal quartz crystal with frequency 32768kHz, frequency deviation (f/f) of 15 x 10-6 and CL = 8.2 pF; the oscillator frequency is offset (by using non-symmetrical internal oscillator input and output capacitances of 10 pF and 15 pF) such that the frequency deviation is positive-only. This positive deviation can then be compensated for to maintain time-keeping accuracy. Once the positive frequency deviation is measured, a corresponding number `n' (see Table 1) is programmed into the device's EEPROM. This causes n pulses of frequency 8192 Hz to be inhibited every minute of operation, which achieves the required calibration. The programming circuit is shown in Fig.2. The required number n is programmed into EEPROM by varying VDD according to the steps shown in Fig.3, which are explained below: 1. The positive quartz frequency deviation (f/f) is measured, and the corresponding values of n are found according to Table 1. 2. VDD is increased to 5.1 V allowing the contents of the EEPROM to be checked from the motor pulse period tT3 at nominal frequency. Table 1 Quartz crystal frequency deviation, n and tT3 NUMBER OF PULSES (n) 0 1 2 . . . 63
PCA16xx series
3. VDD is decreased to 2.5 V during a motor pulse to initialize a storing sequence. 4. The first VDD pulse to 5.1 V erases the contents of EEPROM. 5. When the EEPROM is erased a logic 1 is at the TEST pin. 6. VDD is increased to 5.1 V to read the data by pulsing VDD n times to 4.5 V. After the n edge, VDD is decreased to 2.5 V. 7. VDD is increased to 5.1 V to store n bits in the EEPROM. 8. VDD is decreased to 2.5 V to terminate the storing sequence and to return to operating mode. 9. VDD is increased to 5.1 V to check writing from the motor pulse period tT3. 10. VDD is decreased to the operation voltage between two motor pulses to return to operating mode. (Decreasing VDD during the motor pulse would restart the programming mode). The time calibration can be reprogrammed up to 100 times.
FREQUENCY DEVIATION f/f (x 10-6) 0(1) +2.03 +4.06 . . . +127.89 Notes
SIGNAL GENERATOR
tT3 (ms)
V SS
31.250(2) 31.372 31.494 . . . 38.936
32 kHz OSC OUT OSC IN TEST
1
8
RESET
2
7
M2
M
PCA16xx SERIES
3 6
M1
4
5
VDD
MSA975
1. Increments of 2.03 x 10-6/step. 2. Increments of 122 s/step.
Fig.2 Circuit for programming the time calibration.
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1997 Dec 12
ERASURE DATA INPUT STORING CHECKING V DDP 1 2 3 n t T3
Philips Semiconductors
CONTENT CHECKING
I DD
5.1 4.5 t edge = 1 s 0.1 ms min. 3 4 5 6 7 8 9 10
32 kHz watch circuits with EEPROM
9
10
VDD (V)
5
t E = 5 ms t S = 5 ms (1) (1) (1)
2.5
1
2
1.5
0 (VSS)
MSA948
(1)
(1) Rise and fall time should be greater than 400 s/V for immediately correct checking.
PCA16xx series
Product specification
Fig.3 VDD for programming.
Philips Semiconductors
Product specification
32 kHz watch circuits with EEPROM
PCA16xx series
AVAILABLE TYPES Refer to Fig.4 and to Chapters "Ordering information" and "Functional description and testing". SPECIFICATIONS SHORT TYPE NUMBER 1601 1602 1603 1604 1605 1606 1607 1608 1611 1621 1622 1623 1624 1625 1626 1627 1628 1629 Note 1. U = Chip in trays; U/7 = chip with bumps on tape; U/10 = chip on foil. T = SOT144-1. DELIVERY FORMAT(1) U/10 T U/7 U/10 U/7 U/10 U U U U/7 U U U U/7 U U/7 U U/7 PERIOD tT (s) 1 1 20 5 5 10 5 5 1 20 1 20 12 5 20 20 20 5 PULSE WIDTH tP (ms) 7.8 7.8 7.8 7.8 4.8 6.8 5.8 7.8 6.8 4.8 4.8 4.8 3.9 5.8 5.8 5.8 5.8 6.8 DRIVE (%) 100 75 100 75 75 100 100 75 100 75 75 100 100 75 75 56 75 100 100 75 75 75 EEPROM yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes BATTERY EOL DETECTION no no no no no no no no no no yes no no no no no no no 1.5 V and 2.1 V Lithium 1.5 V and 2.1 V Lithium 1.5 V and 2.1 V Lithium 1.5 V and 2.1 V Lithium REMARKS
V M1 - M2
tT 2t T
MSA977
tP
Fig.4 Motor output waveform (normal operation).
1997 Dec 12
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Philips Semiconductors
Product specification
32 kHz watch circuits with EEPROM
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC134). SYMBOL VDD VI Tamb Tstg Note PARAMETER supply voltage all input voltages output short-circuit duration operating ambient temperature storage temperature -10 -30 CONDITIONS VSS = 0 V; note 1
PCA16xx series
MIN. -1.8 VSS
MAX. +6 VDD indefinite +60 +100 V V
UNIT
C C
1. Connecting the battery with reversed polarity does not destroy the circuit, but in this condition a large current flows, which will rapidly discharge the battery. 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". CHARACTERISTICS VDD = 1.55 V; VSS = 0 V; fosc = 32.768 kHz; Tamb = 25 C; crystal: RS = 20 k; C1 = 2 to 3 fF; CL = 8 to 10 pF; C0 = 1 to 3 pF; unless otherwise specified. Immunity against parasitic impedance = 20 M from one pin to an adjacent pin. SYMBOL Supply VDD VDD VDDP VDDP IDD1 IDD2 IDD3 IDD4 IDD5 supply voltage supply voltage variation supply voltage pulse supply voltage pulse variation supply current supply current supply current supply current supply current Tamb = -10 to +60 C transient; VDD = 1.2 to 2.5 V programming programming between motor pulses between motor pulses; VDD = 2.1 V stop mode; pin 8 connected to VDD stop mode; pin 8 connected to VDD; VDD = 2.1 V VDD = 2.1 V; Tamb = -10 to +60 C 1.2 - 5.0 0.55 - - - - - 1.5 - 5.1 0.6 170 190 180 220 - 2.5 0.25 5.2 0.65 260 300 280 360 600 V V V V nA nA nA nA nA PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
1997 Dec 12
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Philips Semiconductors
Product specification
32 kHz watch circuits with EEPROM
PCA16xx series
SYMBOL Motor output Vsat Rsc tT tP Oscillator VOSC ST gm tosc f/f Ci Co VLIT VEOL VVLD TCVLD tV Reset input fo Vo tedge Iim Ii(av) Test mode
PARAMETER saturation voltage (P + N) short-circuit resistance (P + N) cycle time pulse width
CONDITIONS RL = 2 k; Tamb = -10 to +60 C Itransistor < 1 mA
MIN. - -
TYP.
MAX.
UNIT
150 200
200 300 note 1 note 2
mV
starting voltage transconductance start-up time frequency stability input capacitance output capacitance VDD = 100 mV Vi(p-p) 50 mV
1.2 6 - - 8 12
- 15 1
- - -
V S s
0.05 x 0.3 x 10-6 10-6 10 15 12 18 pF pF
Voltage level detector threshold voltage threshold voltage hysteresis of threshold temperature coefficient voltage detection cycle lithium mode battery end-of-life 1.65 1.27 - - - - R = 1 M; C = 10 pF R = 1 M; C = 10 pF note 3 1.4 - - - 1.80 1.38 10 -1 60 1.95 1.46 - - - - - - - - V V mV mV/K s
output frequency output voltage swing edge time peak input current average input current
32 - 1 320 10
Hz V s nA nA
cycle time for motor pulses in: tT1 tT2 tT3 tDEB tEOL tE1 tE2 Notes 1. Cycle time can be changed to one of the following values: 1, 5, 10, 12 or 20 s (see Chapter "Available types"). 2. Pulse width can be varied from 2 ms to 15.7 ms in steps of 1 ms (see Chapter "Available types"). 3. Duty factor is 1 : 32 and RESET = VDD or VSS. 1997 Dec 12 8 test 1 test 2 test 3 debounce time RESET = VDD - - 14.7 - see "Available types" - - 125 31.25 - - - 123.2 - - - ms ms ms
see Chapter "Available types"
Battery end-of-life end-of-life sequence motor pulse width time between pulses 4 tP 31.25 s ms ms
Philips Semiconductors
Product specification
32 kHz watch circuits with EEPROM
CHIP DIMENSIONS AND BONDING PAD LOCATIONS
PCA16xx series
y OSC OUT OSC IN TEST
V SS
1.44 mm
PCA16xxU SERIES
0 0 VDD M1 2.02 mm
MSA976
x M2 RESET
Chip area: 2.91 mm2. Bonding pad dimensions: 110 m x 110 m. Chip thickness: 200 25 m, with bumps: 270 25 m.
Fig.5 Bonding pad locations, PCA16xxU series, 8 terminals. Table 2 Bonding pad locations (dimensions in m) All x/y coordinates are referenced to the centre of pad (VDD), see Fig.5. PAD VSS TEST OSC IN OSC OUT VDD M1 M2 RESET chip corner (max. value) x 1290 940 481 -102 0 578 930 1290 -497.5 y 1100 1100 1100 1100 0 0 0 0 -170
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Philips Semiconductors
Product specification
32 kHz watch circuits with EEPROM
APPLICATION INFORMATION
PCA16xx series
1.55 V
V SS
1
8
RESET
TEST
(1)
2
7
M2
M
OSC IN
PCA16xx SERIES
3 6
M1
OSC OUT
4
5
VDD
MSA974
(1) Quartz crystal case should be connected to VDD. Stray capacitance and leakage resistance from RESET, M1 or M2 to OSC IN should be less than 0.5 pF or larger than 20 M.
Fig.6 Typical application circuit diagram.
1997 Dec 12
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Philips Semiconductors
Product specification
32 kHz watch circuits with EEPROM
PACKAGE OUTLINE PMFP8: plastic micro flat package; 8 leads (straight)
PCA16xx series
SOT144-1
D
E
X
m
c
t
n HE
8
5
Q2 A2 pin 1 index Q1 L detail X 1 e b 4 wM
0
2.5 scale
5 mm
DIMENSIONS (mm are the original dimensions) UNIT mm A2 0.90 0.70 b 0.40 0.25 c 0.19 0.12 D (1) 3.1 2.9 E (1) 3.1 2.9 e 0.80 HE 4.6 4.4 L 0.75 m max. 0.26 n max. 0.3 Q1 0.40 0.30 Q2 0.40 0.30 t 0.95 w 0.1
Note 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. OUTLINE VERSION SOT144-1 REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION
ISSUE DATE 94-01-25 95-01-24
1997 Dec 12
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Philips Semiconductors
Product specification
32 kHz watch circuits with EEPROM
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). Reflow 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
PCA16xx series
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 diagonallyopposite 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 Dec 12
12
Philips Semiconductors
Product specification
32 kHz watch circuits with EEPROM
DEFINITIONS Data sheet status Objective specification Preliminary specification Product specification Limiting values
PCA16xx series
This data sheet contains target or goal specifications for product development. This data sheet contains preliminary data; supplementary data may be published later. This data sheet contains final product specifications.
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 specification 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 specification. 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.
1997 Dec 12
13
Philips Semiconductors
Product specification
32 kHz watch circuits with EEPROM
NOTES
PCA16xx series
1997 Dec 12
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Philips Semiconductors
Product specification
32 kHz watch circuits with EEPROM
NOTES
PCA16xx series
1997 Dec 12
15
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For all other countries apply to: Philips Semiconductors, Marketing & Sales Communications, Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825 (c) Philips Electronics N.V. 1997
Internet: http://www.semiconductors.philips.com
SCA54
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights.
Printed in The Netherlands
417087/1200/03/pp16
Date of release: 1997 Dec 12
Document order number:
9397 750 03142

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