Philips PCA148x Series 32kHz Watch Circuits with Adaptive Motor Pulse - Data Manual/Specifications
Summary
This low-power integrated circuit series manages robust motor control for quartz crystal wristwatches. Designed with adaptive pulsing, the PCA148x ensures continuous operation and reliable timekeeping while minimizing current draw. The comprehensive manual details every aspect of the chip, including its 32 kHz oscillator function, multi-stage motor sequencing (Stage 1 through Stage 6) for increased torque, low battery consumption specifications, pinout, и programmable calibration procedures. It is essential for watch manufacturers and designers requiring high-precision, reliable timing solutions for advanced electronic timepieces.
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查询PCA148x series供应商
INTEGRATED CIRCUITS
DATA SHEET
PCA148x series k Hz watch circuits with adaptive motor pulse
Product specification Apr
Supersedes data of 1998 Mar File under Integrated Circuits, IC16
Page Summary Contents For Philips PCA148x Series 32kHz Watch Circuits with Adaptive Motor Pulse - Data Manual/Specifications
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查询PCA148x series供应商 INTEGRATED CIRCUITS DATA SHEET PCA148x series k Hz watch circuits with adaptive motor pulse Product specification Apr Supersedes data of 1998 Mar File under Integrated Circuits, IC...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse FEATURES No loss of motor steps possible because of on-chip detection of the induced motor vol...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse FUNCTIONAL DESCRIPTION AND TESTING After a RESET the circuit always starts and continues with ...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse Voltage level detector Detection of motor movement The supply voltage is compared with the int...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse Detection criteria The waveform of the induced current must enable all these measurements with...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse MOTOR PULSE DETECTION PHASE detection criterion is satisfied part 1 part 2 MSA944 DS DI Fig.5 ...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse Correction sequence (see Fig.7) If a missing step is detected, a correction sequence is produc...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse Time calibration 3. VDD is decreased to 2.5 V during a motor pulse to initialize a storing seq...
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hi te xt is er in hi te to fo rc la nd sc ap pa ge to ro ta te co rr ec tly he br ow si ng th ro ug th pd f i th cr ob at ea de r. hi te xt is er in _w hi te to fo rc la nd sc ap pa ge to ro ta te co ...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse Power-on reset Test 1, VDD VEOL. Normal function takes place except that the motor pulse perio...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL PARAME...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse CHARACTERISTICS VDD 1.55 V; VSS V; fosc 32.768 k Hz; Tamb °C; crystal: RS kΩ; C1 to f F; CL to...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse TIMING PARAMETERS SYMBOL PARAMETER SECTION VALUE OPTION UNIT t T cycle for motor pulse (note 1...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse CHIP DIMENSIONS AND BONDING PAD LOCATIONS VSSTESTOSC INOSC OUT PCA148x U 1.44 mm SERIES VDD M1...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse APPLICATION INFORMATION RESETVSS TEST M2 PCA148x SERIES OSC IN M1 OSC OUT MSA967 (1) Quartz cr...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse PACKAGE OUTLINE PMFP8: plastic micro flat package; 8 leads (straight) SOT144-1 pin 1 index det...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse DEFINITIONS Data sheet status Objective specification This data sheet contains target or goal ...
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Philips Semiconductors Product specification k Hz watch circuits with adaptive motor PCA148x series pulse NOTES
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Philips Semiconductors – a worldwide company Argentina: see South America Netherlands: Postbus 90050, 5600 PB EINDHOVEN, Bldg. VB, Tel. +31 82785, Fax. +31 Australia: 34 Waterloo Road, NORTH RYDE, NSW...
Manual Details
| Brand | Philips |
|---|---|
| Pages | 20 |
| File Size | 94.37 KB |
| Published | June 22, 2026 |
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Frequently Asked Questions
What is the typical current consumption of the PCA148x series?
Typically 170 nA.
How does the device handle missed motor steps?
It starts a correction sequence and operates at higher stages for up to 8 minutes.
What indicates battery end-of-life on PCA148x?
The IC includes an indication feature for battery end-of-life.
What happens after a RESET is applied to the circuit?
After RESET, the circuit starts at stage 1 and progresses through motor pulse stages.
What external component is required for the device?
Only a quartz crystal is needed externally.