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PCA2000; PCA2001

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Datasheet

PCA2000; PCA2001
(Product Specification)
16-Jul-09, 28 pages, 143 kB

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PCA2000; PCA2001 - 32 kHz watch circuit with programmable adaptive motor pulse

General description
Features
Products/packages
Quality/reliability/chemical content
Pricing/ordering/availability
Samples
Discontinued information
Applications
Block diagrams/pinning
Design support
Parametrics/similar products
Print/email
Disclaimers
All information hereunder is subject to the subsequent disclaimers

General description

The PCA2000 and PCA2001 are CMOS integrated circuits for battery operated wrist watches with a 32 kHz quartz crystal as timing element and a bipolar 1 Hz stepping motor. The quartz crystal oscillator and the frequency divider are optimized for minimum power consumption. A timing accuracy of 1 ppm is achieved with a programmable, digital frequency adjustment.

To obtain the minimum overall power consumption for the watch, an automatic motor pulse adaptation function is provided. The circuit supplies only the minimum drive current, which is necessary to ensure a correct motor step. Changing the drive current of the motor is achieved by chopping the motor pulse with a variable duty cycle. The pulse width and the range of the variable duty cycle can be programmed to suit different types of motors. The automatic pulse adaptation scheme is based on a safe dynamic detection of successful motor steps.

A pad RESET is provided (used for stopping the motor) for accurate time setting and for accelerated testing of the watch.

The PCA2000 has a battery End Of Life (EOL) warning function. If the battery voltage drops below the EOL threshold voltage (which can be programmed for silver oxide or lithium batteries), the motor steps change from one pulse per second to a burst of four pulses every 4 seconds.

The PCA2001 uses the same circuit as the PCA2000, but without the EOL function.

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Features

  • Amplitude-regulated 32 kHz quartz crystal oscillator, with excellent frequency stability and high immunity to leakage currents
  • Electrically programmable time calibration with 1 ppm resolution stored in One Time Programmable (OTP) memory
  • The quartz crystal is the only external component connected
  • Very low power consumption, typical 90 nA
  • One second output pulses for bipolar stepping motor
  • Minimum power consumption for the entire watch, due to self adaptation of the motor drive according to the required torque
  • Reliable step detection circuit
  • Motor pulse width, pulse modulation, and pulse adaptation range programmable in a wide range, stored in OTP memory
  • Stop function for accurate time setting and power saving during shelf life
  • End Of Life (EOL) indication for silver oxide or lithium battery (only the PCA2000 has the EOL feature)
  • Test mode for accelerated testing of the mechanical parts of the watch and the IC
  • Test bits for type recognition

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Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
PCA2000CX8/5/1PCA2000CX8/5/1,0259352 868 24025Volume productionUncased dieChips on Wafer, Un-Sawn, Electrical TestedNo Marking
PCA2000U/10AB/1PCA2000U/10AB/1,009352 780 82005Volume productionUncased dieChips on Wafer, Pre-Sawn, On FFCNo Marking
PCA2000U/10AC/1PCA2000U/10AC/1,009352 895 57005Volume productionUncased dieChips on Wafer, Pre-Sawn, On FFCNo Marking
PCA2000U/AB/1PCA2000U/AB/1,0269352 780 81026Volume productionUncased dieDie In Waffle CarriersNo Marking
PCA2000U/AC/1PCA2000U/AC/1,0269352 895 56026Volume productionUncased dieDie In Waffle CarriersNo Marking
PCA2001CX8/5/1PCA2001CX8/5/1,0259352 868 23025Volume productionUncased dieChips on Wafer, Un-Sawn, Electrical TestedNo Marking
PCA2001U/10AB/1PCA2001U/10AB/1,009352 780 96005Volume productionUncased dieChips on Wafer, Pre-Sawn, On FFCNo Marking
PCA2001U/10AC/1PCA2001U/10AC/1,009352 895 59005Volume productionUncased dieChips on Wafer, Pre-Sawn, On FFCNo Marking
PCA2001U/AB/1PCA2001U/AB/1,0269352 780 92026Volume productionUncased dieDie In Waffle CarriersNo Marking
PCA2001U/AC/1PCA2001U/AC/1,0269352 895 58026Volume productionUncased dieDie In Waffle CarriersNo Marking

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Quality/reliability/chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree Conversion dateRHFIRF (FIT)MTBF (hours)MSL
PCA2000CX8/5/1PCA2000CX8/5/1,025PCA2000CX8_5_1
Always Pb-free
PCA2000U/10AB/1PCA2000U/10AB/1,00PCA2000U_10AB_1
Always Pb-free
PCA2000U/10AC/1PCA2000U/10AC/1,00PCA2000U_10AC_1
Always Pb-free
PCA2000U/AB/1PCA2000U/AB/1,026PCA2000U_AB_1
Always Pb-free
PCA2000U/AC/1PCA2000U/AC/1,026PCA2000U_AC_1
Always Pb-free
PCA2001CX8/5/1PCA2001CX8/5/1,025PCA2001CX8_5_1
Always Pb-free
PCA2001U/10AB/1PCA2001U/10AB/1,00PCA2001U_10AB_1
Always Pb-free
PCA2001U/10AC/1PCA2001U/10AC/1,00PCA2001U_10AC_1
Always Pb-free
PCA2001U/AB/1PCA2001U/AB/1,026PCA2001U_AB_1
Always Pb-free
PCA2001U/AC/1PCA2001U/AC/1,026PCA2001U_AC_1
Always Pb-free

Quality and reliability disclaimer

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Pricing/ordering/availability

Type numberOrdering code(12NC)Orderable part numberIndicative price/unit($)RegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
PCA2000CX8/5/19352 868 24025  PCA2000CX8/5/1,025        not available
PCA2000U/10AB/19352 780 82005  PCA2000U/10AB/1,00        not available
PCA2000U/10AC/19352 895 57005  PCA2000U/10AC/1,00        not available
PCA2000U/AB/19352 780 81026  PCA2000U/AB/1,026        Order samples
PCA2000U/AC/19352 895 56026  PCA2000U/AC/1,026        Order samples
PCA2001CX8/5/19352 868 23025  PCA2001CX8/5/1,025        not available
PCA2001U/10AB/19352 780 96005  PCA2001U/10AB/1,00        not available
PCA2001U/10AC/19352 895 59005  PCA2001U/10AC/1,00        not available
PCA2001U/AB/19352 780 92026  PCA2001U/AB/1,026        not available
PCA2001U/AC/19352 895 58026  PCA2001U/AC/1,026        Order samples
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Applications

  • Driver circuits for bipolar stepping motors
  • High immunity motor drive circuits

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Block diagrams/pinning

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