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HT1381

Features: ` Operating voltage: 2.0V~5.5V`Maximum input serial clock: 500kHz at VDD=2V, 2MHz at VDD=5V`Operating current: less than 400nA at 2V, less than 1.2A 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...

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SeekIC No. : 004366572 Detail

HT1381: Features: ` Operating voltage: 2.0V~5.5V`Maximum input serial clock: 500kHz at VDD=2V, 2MHz at VDD=5V`Operating current: less than 400nA at 2V, less than 1.2A at 5V`TTL compatible`VIH: 2.0V~VDD+0.3V...

HT1381 Data Sheet

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Part Number:
HT1381
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/13

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Product Details

Description



Features:

` Operating voltage: 2.0V~5.5V
` Maximum input serial clock: 500kHz at VDD=2V, 2MHz at VDD=5V
` Operating current: less than 400nA at 2V, less than 1.2A 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


Application

· Microcomputer serial clock
· Clock and Calendar


Pinout

Connection Diagram




Specifications

Supply Voltage.............................-0.3V to 5.5V
Storage Temperature................ -50 to 125
Input Voltage ............... VSS-0.3V to VDD+0.3V
Operating Temperature ................. 0 to 70

Note: These are stress ratings only. Stresses exceeding the range specified under "Absolute Maximum Ratings" may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.


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. They 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/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, they 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.




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