HT1380  HT1381 -- Serial Timekeeper Chip HT1380  HT1381

General Description HT1380  HT1381

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 mode.

The HT1380  HT1381has several registers to store the corresponding information with 8-bit data format. A 32768Hz crystal is required to provide the correct timing. In order to minimize the pin number, the HT1380  HT1381use a serial I/O transmission method to interface with a microprocessor. Only three wires are required: (1) RESTB, (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 HT1380/HT1381  Operating voltage: 2.0V~5.5V HT1380/HT1381  Maximum input serial clock: 500kHz at VDD=2V, 2MHz at VDD=5V HT1380/HT1381  Operating current: less than 400nA at 2V, less than 1.2uA at 5V HT1380/HT1381  TTL compatible - VIH: 2.0V~VDD+0.3V at VDD=5V - VIL: -0.3V~+0.8V at VDD=5V HT1380  HT1381  Two data transmission modes: single-byte or burst mode HT1380  HT1381  Serial I/O transmission HT1380  HT1381  All registers store BCD format HT1380: 8-pin DIP package HT1381: 8-pin SOP package

技術(shù)相關(guān)信息 Data Sheet 封裝信息 8-pin DIP 封裝 8-pin SOP 封裝 問(wèn)答集 應(yīng)用范例 其它相關(guān)信息 Selection Guide 產(chǎn)品型號(hào)索引