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BQ4845YS-A4 BQ4845YS-A4 is a Real Time Clock (RTC) IC from Texas Instruments with parallel interface, clock/calendar features including alarm, daylight savings, leap year, supervisor, and watchdog timer. It operates from 2.3V to 4V and is available in a 28-SOIC surface mount package.
Mfr Part #:

BQ4845YS-A4

Available from 1 distributors
Mfr Name: Texas Instruments
Texas Instruments
BQ4845YS-A4 is a Real Time Clock (RTC) IC from Texas Instruments with parallel interface, clock/calendar features including alarm, daylight savings, leap year, supervisor, and watchdog timer. It operates from 2.3V to 4V and is available in a 28-SOIC surface mount package.
✓ Total Stock: 600 pcs

BQ4845YS-A4 Available from 1 distributor

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✓ Non-Authorised
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Optech Co.,Limited ✓
Non-Authorised Inventory information
600 pcs
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600 pcs On Request 1 On Request On Request 00+ On Request On Request
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BQ4845YS-A4 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Date Format
Features
Interface
Mounting Type
Operating Temperature
Supplier Device Package
Time Format
Type
Voltage
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BQ4845YS-A4 Description

Short technical summary and product information.

The BQ4845YS-A4 is a low-power real-time clock (RTC) IC from Texas Instruments designed for timekeeping, calendar, and system supervision. It integrates a time-of-day clock, 100-year calendar, and a CPU supervisor in a 28-pin SOIC package. The device supports a parallel interface for communication with microprocessors. Key features include alarm interrupt, daylight savings adjustment, leap year compensation, watchdog timer, and supervisor functionality. The RTC consumes less than 500nA of backup current, ensuring long battery life during power loss. The operating voltage range is 2.3V to 4V, though conflicts with datasheet suggest verification may be needed. The device operates over a temperature range of 0°C to 70°C. It is available in a surface mount 28-SOIC package (0.295", 7.50mm width). Typical applications include fax machines, copiers, industrial control systems, point-of-sale terminals, data loggers, and computers.

BQ4845YS-A4 Quick Information

Product Type: Real Time Clock (RTC) IC
Series: bq4845
Canonical Name: Texas Instruments BQ4845YS-A4 Real Time Clock (RTC) IC
Subcategory: Clock/Calendar

BQ4845YS-A4 Compliance

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

BQ4845YS-A4 Features

  • Parallel interface for easy microcontroller communication.
  • Includes alarm, daylight savings, and leap year features.
  • Supervisor and watchdog timer for system reliability.
  • Low backup current of less than 500nA.
  • Surface mount 28-SOIC package.

BQ4845YS-A4 Applications

  • Ideal for fax machines and copiers.
  • Used in industrial control systems.
  • Suitable for point-of-sale terminals.
  • Perfect for data loggers and computers.

BQ4845YS-A4 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the supply voltage range for the BQ4845YS-A4?

2.3V to 4V (note: datasheet suggests 5V, verify with manufacturer).

What package is the BQ4845YS-A4 available in?

28-SOIC (0.295", 7.50mm Width) surface mount.

What is the operating temperature range?

0°C to 70°C.

Is the BQ4845YS-A4 RoHS compliant?

RoHS3 Compliant (unverified confidence).

What interface does the BQ4845YS-A4 use?

Parallel interface.

What features does the BQ4845YS-A4 include?

Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer.

What time format is supported?

HH:MM:SS (12/24 hr) and date format YY-MM-DD-dd.

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