HT1380 - Holtek Semiconductor Inc

HT1380 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-hour mode with an AM/PM indicator, the other is the 24-hour m.

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
· Two data transmission modes: single-byte, or burst mode
· Serial I/O transmission
· All registers store BCD format
· HT1380: 8-pin DIP package HT1381: 8-pin SOP package
· Clock and Calendar General Description The HT1380/HT1381 is a serial timekeeper IC which provides seconds, minutes, hours, day, date, month and year.