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EM1537 - Low-Power CMOS

Description

The EM1537 is an integrated circuit in a low power CMOS technology for battery operated wristwatches with bipolar stepping motors.

Time base is a 32 kHz crystal oscillator.

It has a very low current consumption of typ.

Features

  • Low power 32 kHz Quartz oscillator.
  • Operating voltage ranges 1.55V and 3 Volt.
  • Very low current consumption typ. 100 nA at 1.5V.
  • Motor pulse width motor period and motor pulse chopping is programmable in a wide range by metal mask and don’t require additional bonds.
  • Fully debounced RESET input for accurate time setting and power saving during shelf life.
  • Integrated capacitors, mask selectable is steps of 1 pF up to 35 pF.
  • Operation temperature range: -10°.

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Datasheet preview – EM1537

Datasheet Details

Part number EM1537
Manufacturer EM Microelectronic
File Size 233.00 KB
Description Low-Power CMOS
Datasheet download datasheet EM1537 Datasheet
Additional preview pages of the EM1537 datasheet.

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    Full PDF Text Transcription

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    R EM MICROELECTRONIC - MARIN SA EM1537 Low Power 32 kHz Circuit for Analog Quartz Watches Description The EM1537 is an integrated circuit in a low power CMOS technology for battery operated wristwatches with bipolar stepping motors. Time base is a 32 kHz crystal oscillator. It has a very low current consumption of typ. 100 nA in a wide voltage range of 1.2 to 3.6 Volt. The IC is available in two voltage ranges - 1.2 to 1.8 Volt and 1.8 to 3.6 V. Motor pulse width is programmable from 0.098 ms to 14.65 ms in steps of 0.98 ms by metal mask. Motor period is programmable from 2 x 1s to 2 x 60 s in steps of 1 s selectable by metal mask. Motor pulse chopping is programmable from 1/8 to 8/8 in steps of 1/8 with chopping frequencies of 1024 Hz or 2048 Hz selectable by metal mask.
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