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HT1380A/HT1381A Serial Timekeeper Chip
Features
• Operating voltage: 2.0V~5.5V • Maximum input serial clock: 500kHz at VDD=2V,
2MHz at VDD=5V • Operating current:
–– less than 0.5μA at 2V –– less than 0.7μA at 3V –– less than 1.0μA at 5V • TTL compatible –– VIH: 2.0V~VDD+0.3V at VDD=5V –– VIL: 0.3V~+0.8V at VDD=5V • Two data transmission modes: single-byte, or burst mode • Serial I/O transmission • All registers store BCD format • HT1380A: 8-pin DIP package HT1381A: 8-pin SOP package
Applications
• Microcomputer serial clock • Clock and Calendar
General Description
The HT1380A/HT1381A 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.
HT1380A Datasheet
