HT1381 - Serial Timekeeper Chip
The HT1380/HT1381 is a serial timekeeper IC which provides seconds, minutes, hours, day, date, month and year information.
The number of days in each month and leap years are automatically adjusted.
The HT1380/HT1381 is designed for low power consumption and can operate in two modes: one is the 12-h
HT1381 Features
* Operating voltage: 2.0V~5.5V
* Maximum input serial clock: 500kHz at VDD=2V, 2MHz at VDD=5V
* Operating current: less than 1mA at 2V, less than 1.2mA at 5V
* TTL compatible - VIH: 2.0V~VDD+0.3V at VDD=5V - VIL: -0.3V~+0.8V at VDD=5V Applications
* Microcomputer serial clock
