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UPD4991AGS Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
UPD4991AGSNEC130Yes

Part Number:** UPD4991AGS **Manufacturer:** NEC ### **Specifications:** - **Type:** Real-Time Clock (RTC) IC - **Supply Voltage:** 2.

Part Number: UPD4991AGS

Manufacturer: NEC

Specifications:

  • Type: Real-Time Clock (RTC) IC
  • Supply Voltage: 2.7V to 6.0V
  • Clock Frequency: 32.768 kHz (standard crystal frequency)
  • Timekeeping Accuracy: Depends on external crystal (typical ±5 ppm at 25°C)
  • Interface: Serial (3-wire or 4-wire)
  • Operating Temperature Range: -40°C to +85°C
  • Package: SOP (Small Outline Package)

Descriptions:

  • The UPD4991AGS is a real-time clock IC designed for timekeeping applications.
  • It includes counters for seconds, minutes, hours, day, month, and year (with leap-year compensation).
  • Features low power consumption, making it suitable for battery-backed systems.

Features:

  • Built-in calendar function (up to year 2099).
  • Alarm and timer functions.
  • Battery backup support for continuous timekeeping.
  • Serial interface for communication with microcontrollers.
  • Low standby current in battery mode.

(Note: For detailed electrical characteristics and timing diagrams, refer to the official NEC datasheet.)

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