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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 Details

Part number EM1537
Manufacturer EM Microelectronic
File Size 233.00 KB
Description Low-Power CMOS
Datasheet download datasheet EM1537 Datasheet

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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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