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BQ4822YMA-70 The BQ4822YMA-70 from Texas Instruments is a Real Time Clock module integrating 8Kx8 NVSRAM, clock, CPU supervisor, and battery in a 28-pin DIP package. It features a parallel interface, alarm, watchdog timer, and operates from 4.5V to 5.5V.
Mfr Part #:

BQ4822YMA-70

Available from 2 distributors
Mfr Name: Texas Instruments
Texas Instruments
The BQ4822YMA-70 from Texas Instruments is a Real Time Clock module integrating 8Kx8 NVSRAM, clock, CPU supervisor, and battery in a 28-pin DIP package. It features a parallel interface, alarm, watchdog timer, and operates from 4.5V to 5.5V.
✓ Total Stock: 131 pcs

BQ4822YMA-70 Available from 2 distributors

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✓ Non-Authorised
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Rayichip ✓
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96 pcs
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96 pcs On Request 1 On Request On Request On Request On Request On Request
Optech Co.,Limited ✓
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35 pcs
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35 pcs On Request 1 On Request On Request 12+ On Request On Request
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BQ4822YMA-70 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Date Format
Features
Interface
Lead Style
Memory Size
Mounting Type
Number of Pins
Operating Temperature
Supplier Device Package
Time Format
Type
Voltage
Watchdog Timer
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BQ4822YMA-70 Description

Short technical summary and product information.

The Texas Instruments BQ4822YMA-70 is a highly integrated RTC Module that combines a non-volatile 65,536-bit SRAM (organized as 8192 words by 8 bits) with a full-featured real-time clock and CPU supervisor in a compact 28-pin DIP module. It includes an internal lithium battery, quartz crystal, and power-fail control circuit, ensuring 10-year minimum data retention and clock operation without external power. The device provides a programmable watchdog timer, microprocessor reset, alarm, and periodic interrupt functions. Its parallel interface and compatibility with industry-standard SRAMs allow for easy integration into existing designs without special write timing or write cycle limitations. The BQ4822YMA-70 operates over a 0°C to 70°C temperature range and requires a 4.5V to 5.5V supply.

BQ4822YMA-70 Quick Information

Product Type: Real Time Clock Module
Canonical Name: BQ4822YMA-70 Real Time Clock Module with 8Kx8 NVSRAM
Subcategory: RTC Module with NVSRAM

BQ4822YMA-70 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

BQ4822YMA-70 Features

  • Integrated 8Kx8 NVSRAM with real-time clock.
  • Internal lithium battery with 10-year data retention.
  • Programmable watchdog timer and power-on reset.
  • Parallel interface compatible with standard SRAMs.
  • Operating voltage 4.5V to 5.5V.

BQ4822YMA-70 Applications

  • Used in embedded systems requiring non-volatile memory.
  • Ideal for industrial control and automation.
  • Suitable for data logging equipment.
  • Applied in point-of-sale terminals.
  • Used in telecommunications infrastructure.

BQ4822YMA-70 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the supply voltage range for the BQ4822YMA-70?

4.5V to 5.5V.

What package is the BQ4822YMA-70 available in?

28-DIP Module (0.61", 15.49mm).

What is the operating temperature range?

0°C to 70°C.

Is the BQ4822YMA-70 RoHS compliant?

RoHS3 Compliant (unverified).

What is the memory size of the BQ4822YMA-70?

8K x 8 (65,536-bit SRAM).

What is the data retention time?

10-year minimum.

Does the BQ4822YMA-70 include a watchdog timer?

Yes, a programmable watchdog timer.

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