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H1137V03 Datasheet(PDF) 1 Page - EM Microelectronic - MARIN SA |
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H1137V03 Datasheet(HTML) 1 Page - EM Microelectronic - MARIN SA |
1 / 6 page R H1137 Copyright © 2004, EM Microelectronic-Marin SA 1 www.emmicroelectronic.com CMOS circuit for Analog Quartz Watches Description The H1137 is a low power 32kHz analog watch chip de- signed 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 program- mable 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. Application Analog watches 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 Functional Diagram Operating range of Trimmer Capacitance: 3pF ≤ C TR ≤ 30 pF RL (Stepping Motor) CROWN C TR V N V P V P V P RESET MOT 1 MOT 2 OSC IN OSC OUT H1137 V P V N Fig. 1 Pin Assignment H1137 87 6 5 12 3 4 10 Pad Function Pad location VN Negative supply voltage 1 VP Positive supply voltage 5 OSCIN Oscillator input 3 OSCOUT Oscillator output 4 MOT1 Motor drive output 1 7 MOT2 Motor drive output 2 6 RESET Reset input 2 or 8 TEST Test input/output 2 or 8 or 10 Fig. 2 EM MICROELECTRONIC - MARIN SA |
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