EM Microelectronic EM1537
The EM1537 is an integrated circuit in a low power CMOS technology for battery-operated wristwatches with bipolar stepping motors. It has a very low current consumption of typ. The IC is available in two voltage ranges - 1.2 to 1.8 Volt and 1.8 to 3.6 V.| Part No. | EM1537 |
|---|---|
| Datasheet | EM1537 Download |
| Manufacturer |  EM Microelectronic |
| Description | Low Power 32 kHz Circuit |
| Buy | Stock & Price |
DESCRIPTION
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. 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. Motor period in Motor test mode is selectable 2 x 31.25 ms or 2 x 62.5 ms by metal mask Input and output capacitors are integrated on chip and also programmable by metal mask. With a fully debounced RESET pad the motor can be stopped. A multi-functional bidirectional pad MTEST acts as output for a 32 Hz or 512 Hz for frequency tuning - if open, or – if connected to Vp – accelerates the motor period by a factor of 16 or 32.FEATURES
● Low power 32 kHz Quartz oscillator● Operating voltage ranges 1.55V and 3 Volt.
