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DS1677

Features: ·Provides Real-Time ClockCounts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap Year Compensation Valid Up to 2100Power Control Circuitry Supports SystemPower-On from Day/Time Alarm·Microprocessor Monitor Halts Microprocessor During Power-Fail Autom...

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SeekIC No. : 004328633 Detail

DS1677: Features: ·Provides Real-Time ClockCounts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap Year Compensation Valid Up to 2100Power Control Circuitry Supports Sy...

DS1677 Data Sheet

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Part Number:
DS1677
Supply Ability:
5000

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

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Upload time: 2024/12/25

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Product Details

Description



Features:

·Provides Real-Time Clock
Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap Year Compensation Valid Up to 2100
Power Control Circuitry Supports System
Power-On from Day/Time Alarm
·Microprocessor Monitor Halts Microprocessor During Power-Fail Automatically Restarts Microprocessor After Power Failure
    Monitors Pushbutton for External Override Halts and Resets an Out-of-Control Microprocessor
·NV RAM Control Automatic Battery Backup and Write Protection to External SRAM
·3-Channel, 8-Bit ADC
·Simple 3-Wire Interface
·+5.0V Operation
·1.25V Threshold Detector for Power-Fail Warning
·UL Recognized


Pinout

Connection Diagram


Specifications

Voltage Range on Any Pin Relative to Ground................-0.3V to +7.0V
Operating Temperature Range..........................0 to +70
Storage Temperature Range........................-55 to +125
Soldering Temperature...............See IPC/JEDEC J-STD-020 Specification

This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect device reliability.


Description

The DS1677 portable system controller is a circuit that incorporates many of the functions necessary for low-power portable products integrated into one chip. The device provides a real-time clock (RTC), NV RAM controller, microprocessor monitor, power-fail warning, and a 3-channel, 8-bit analog-to-digital converter (ADC). Communication with the DS1677 is established through a simple 3-wire interface.

The RTC provides seconds, minutes, hours, day, date, month, and year information with leap year compensation. The RTC also provides an alarm interrupt. This interrupt works when the DS1677 is powered by the system power supply or when in battery-backup operation so the alarm can be used to wake up a system that is powered down.

Automatic backup and write protection of an external SRAM DS1677 is provided through the VCCO and CEO pins. The backup energy source used to power the RTC is also used to retain RAM data in the absence of VCC through the VCCO pin. CEO, the chip-enable output to SRAM, is controlled during power transients to prevent data corruption.




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