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Real Time Clock 1M (128Kx8) 70ns

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M48T128Y-70PM1 General Description

STMicroelectronics M48T128Y-70PM1, Real Time Clock, 131072B RAM Parallel, 32-Pin PMDIP

Key Features

Integrated, ultra low power SRAM, real-time clock, power-fail control circuit, battery, and crystal

BCD coded year, month, day, date, hours, minutes, and seconds

Automatic power-fail chip deselect and WRITE protection

WRITE protect voltages (VPFD = power-fail deselect voltage):

M48T128Y: VCC = 4.5 to 5.5 V 4.1 VVPFD4.5 V

M48T128V: VCC = 3.0 to 3.6 V 2.7 VVPFD3.0 V

(contact the ST sales office for availability)

Conventional SRAM operation; unlimited WRITE cycles

Software-controlled clock calibration for high accuracy applications

10 years of data retention and clock operation in the absence of power

Self-contained battery and crystal in the DIP package

Pin and function compatible with JEDEC standard 128 K x 8 SRAMs

RoHS compliant

Lead-free second level interconnect


Manufacturer STMicroelectronics Product Category Real Time Clock
RoHS Details Mounting Style Through Hole
Package / Case PMDIP-32 RTC Bus Interface Parallel
Time Format HH:MM:SS Battery Backup Switching Backup Switching
RTC Memory Size 1 MB Supply Voltage - Max 5.5 V
Supply Voltage - Min 4.5 V Minimum Operating Temperature 0 C
Maximum Operating Temperature + 70 C Brand STMicroelectronics
Function Calendar, Clock, NV Timekeeping RAM Product Type Real Time Clocks
Series M48T128Y Factory Pack Quantity 72
Subcategory Clock & Timer ICs


Shipping Method

Our products are mainly transported and delivered by DHL, FedEx, UPS and other logistics partners on site -- Available to 200+ countries.

Delivery Time

The delivery time is usually within 2-7 days, depending on the logistics provider and the area of delivery.

The following are the estimated delivery times of some logistics service providers.

  • DHL

  • Fedex

  • UPS

  • EMS

  • Registered Air Mail


We accept TT prepayment (bank transfer), paypal, credit cards, Western Union, Money Gram.

Checks and other instruments are not supported to pay for orders and customers are required to pay all possible fees, including sales tax,
customs fees, etc.

  • Wire Transfer

  • Paypal

  • Credit Card

  • Western Union

  • Money Gram


Our policies and procedures are designed to ensure compliance with various quality specifications and to quickly resolve quality-related issues.

We promise to provide 365 days quality assurance service for all our products.

If you have any dissatisfaction with the quality of the product you received, you can contact us for a refund or exchange, as long as the product is kept in its original condition.


AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.
  • ESD


  • Tape and Reel

    Tape and Reel

  • Cut Tape

    Cut Tape

  • Tube or Tray

    Tube or Tray


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Buying Guide

  • What is the lifespan of M48T128Y-70PM1?

    The lifespan of M48T128Y-70PM1 depends on various factors such as the quality of materials used, operating conditions, and the manufacturer's recommended usage time. The datasheet provided by the manufacturer specifies the expected lifespan of the product.

  • Where can I find the full specification of M48T128Y-70PM1?

    You can find it with PDF Datasheet for M48T128Y-70PM1 on this page. If it is not available, you can contact Avaq at [email protected] to inquire about the Datasheet for this part.

  • How to check the quality of M48T128Y-70PM1?

    Avaq has separate quality services with common quality inspection equipment for testing items, you can also fill out a sample form, our team will get in touch with you within 24 HOURS.

  • Can I purchase samples for testing?

    Avaq offers free samples for customers to test. This can often help you determine whether the chip or component meets your needs.

  • Where can I check the delivery after the order is completed?

    Once the order is completed, you will receive an order confirmation email containing a tracking number from AVAQ, then you can track the delivery by yourself.

  • Where to view my order of M48T128Y-70PM1 or my history order record?

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