Holtek Semiconductor HT1380
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.| Part No. | HT1380 |
|---|---|
| Datasheet | HT1380 Download |
| Manufacturer |  Holtek Semiconductor |
| Description | Serial Timekeeper Chip |
| Buy | Stock & Price |
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 has 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/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. Block Diagram I/O S C LK D a ta S h ift R e g is te r R e a l T im e C lo c...
