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RX4901CE (RTC Module) – Seiko Epson Corp.

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High stability, Low current consumption, Time stamp function

The RX4901CE is a RTC module with an integrated 32.768 kHz digital temperature compensated crystal oscillator (DTCXO). It includes various functions such as a time stamp function that can record up to 32 dates and times when an external or internal event occurs, as well as the basic RTC functions such as time and calendar, time alarm, wakeup timer, and time update interrupts. With the combination of an auto power switching function, which includes a control circuit to prevent reverse current to the main power supply, a continuous temperature-corrected 32.768 kHz clock generation, and Seiko Epson’s original low current consumption technology, the RX4901CE realizes long battery life on various systems.

Overview

  • Built in frequency adjusted
    32.768 kHz crystal unit
  • Interface Type
    SPI-Bus interface 3 wire, 4 wire
  • Low backup current
    240 nA Typ. / 3 V
  • Auto power switching function
    Automatically switches to backup power supply by
    monitoring the VDD voltage
  • Time stamp function
    32 times max. stamped from year to 1/1024 seconds.
  • Time update interruption
    Hourly, minutely, and secondly
  • Alarm interruption in Day, date,
    hour, minute, second
  • Auto repeat wakeup timer interruption
  • Self-monitoring interruption
    Crystal oscillation stop.
    VBAT low, VDD low.

Block diagram

Specifications (characteristics)

Product name and number

Pin function

External dimensions / Terminal connection

(Unit: mm)

Footprint (Recommended)

(Unit: mm)

To maintain stable operation, provide a 0.1uF by-pass capacitor
at a location as near as possible to the power source terminal of the crystal product (between Vcc – GND)

Video

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Seiko Epson Corp.
Seiko Epson Corp.

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Business Domain

Office and Home Printing Business

Office and home inkjet printers, serial impact dot matrix printers, page printers, color image scanners, dry office paper machines, and their consumables, etc.

Commercial and industrial printing business

Commercial and industrial inkjet printers, inkjet printheads, POS system-related products, label printers, and their consumables, etc.

Visual Communication Business

LCD projectors, smart glasses, etc.

Manufacturing Solutions Business

Industrial robots, small injection molding machines, etc.

Wearable Equipment Business

Watches, watch movements, etc.

Microdevices Business

Crystal devices: Crystal units, crystal oscillators, crystal sensors, etc.
Semiconductors: CMOS LSI, etc.
Others: Metal powders, surface treatment processing

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REAL TIME CLOCK MODULE (SPI-Bus) RX4901CE

Seiko Epson Corp.

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Vendor Information

  • Store Name: Seiko Epson Corp.
  • Vendor: Seiko Epson Corp.
  • Address: 392-0001
    Suwa 3-3-5
    Yamato

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