器件名称: H1137WW27
功能描述: CMOS circuit for Analog Quartz Watches
文件大小: 166.41KB 共6页
简 介:R
EM MICROELECTRONIC - MARIN SA
H1137
CMOS circuit for Analog Quartz Watches
Description
The H1137 is a low power 32kHz analog watch chip designed to drive a stepping motor. Motor pulse width is programmable from 0.9765 to 14.65 milliseconds in steps of 0.9765 milliseconds. Motor pulse period is programmable from 2 x 1 to 2 x 60 seconds in steps of 1 second. Motor pulse period is also programmable from 2 x 0.25 to 2 x 15.75 seconds in steps of 0.25 seconds. Input and output capacitors are integrated on the chip. Their values are metal mask selectable. The selection of width, period and capacitance are metal options and do not require additional bonds.
Features
32Hz quartz oscillator Operating voltage range – 1.2V to –1.8V High oscillator stability Integrated capacitors, mask selectable Mask options for pad designation, motor period and motor pulse width Shorted motor coil between motor pulses Fast motor test function ESD protected terminals 512Hz output on TEST pad for quartz frequency measurement Fully debounced TEST input and RESET input
Application
Analog watches
Functional Diagram
CROWN VN VN RESET VP
Pin Assignment
8 10
7
6
5
H1137
2 3 4
VP
MOT1
CTR
H1137 OSCIN MOT2
RL (Stepping Motor)
1
OSCOUT
VP
VP
Operating range of Trimmer Capacitance: 3pF ≤ CTR ≤ 30 pF
Pad VN VP OSCIN OSCOUT MOT1 MOT2 RESET TEST Fig. 1
Function Negative supply voltage Positive supply voltage Oscillator input Oscillator output Motor drive output 1 Motor drive outpu……
