EM1537数据手册EM Microelectronic中文资料规格书

描述 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. 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 bi-directional 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.
Solutions
·Analog watches
·Driver for bipolar stepping motors

特性 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 do not 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°C to +60°C
·Available in chip form, SO8 package