HT1380/HT1381 Serial Timekeeper Chip

PublishTime：2024-07-30

●General Description
■ 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 consump- tion and can operate in two modes: one is the 12-hour mode with an AM/PM indicator, the other is the 24-hour mode.
■The HT1380/HT1381 has several registers to store the corresponding information with 8-bit data format.
■A 32768Hz crystal is required to provide the correct tim- ing. In order to minimize the pin number, the HT1380/HT1381 use a serial I/O transmission method to interface with a microprocessor. Only three wires are required: (1) REST (2) SCLK and (3) I/O. Data can be delivered 1 byte at a time or in a burst of up to 8 bytes.
●Features
■ Operating voltage: 2.0V~5.5V
■ Maximum input serial clock: 500kHz at VDD=2V, 2MHz at VDD=5V
■ Operating current: less than 1μA at 2V,less than 1.2μA 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
■ HT1380: 8-pin DIP package
◆HT1381: 8-pin SOP package

Brand of Product：	HGSEMi
Part#：	HT1380 、 HT1381 、 HT1380N 、 HT1381M/TR More Part#
Product Category：	Serial Timekeeper Chip 、 serial timekeeper IC More
Application：	[ Microcomputer serial clock ][ Clock ][ Calendar ] More
Data Type：	Datasheet More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：	DIP-8;SOP-8;DIP;SOP
Language：	English Chinese Chinese and English Japanese
Date of Creation：	2023-8-29
Version Number：
Data Encoding：
Data Size：	1.8 MB

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