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BQ4845S-A4 The BQ4845S-A4 is a Clock/Calendar Real Time Clock from Texas Instruments with parallel interface. It features alarm, daylight savings, leap year, supervisor, and watchdog timer.
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BQ4845S-A4

Available from 1 distributors
Mfr Name: Texas Instruments
Texas Instruments
The BQ4845S-A4 is a Clock/Calendar Real Time Clock from Texas Instruments with parallel interface. It features alarm, daylight savings, leap year, supervisor, and watchdog timer.
✓ Total Stock: 47 pcs

BQ4845S-A4 Available from 1 distributor

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✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Optech Co.,Limited ✓
Non-Authorised Inventory information
47 pcs
On Request
47 pcs On Request 1 On Request On Request 17+ On Request On Request
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BQ4845S-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
Voltage Supply
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BQ4845S-A4 Description

Short technical summary and product information.

The BQ4845S-A4 is a low-power real-time clock (RTC) from Texas Instruments that integrates a time-of-day clock, 100-year calendar, and CPU supervisor in a 28-pin SOIC package. It operates from a 4.75V to 5.5V main supply and includes a battery backup switchover circuit supporting a 2.3V to 4V backup battery. The device provides a parallel interface and supports time formats of HH:MM:SS (12/24 hr) and date format YY-MM-DD-dd. Key features include alarm, daylight savings, leap year, supervisor, and watchdog timer. The typical timekeeping current is 1.5mA at 4.5V to 5.5V. The operating temperature range is 0°C to 70°C. The BQ4845S-A4 is surface mounted in a 28-SOIC (0.295", 7.50mm Width) package and is supplied in tube packaging. It is ideal for applications such as fax machines, copiers, industrial control systems, point-of-sale terminals, data loggers, and computers.

BQ4845S-A4 Quick Information

Product Type: Real Time Clock
Canonical Name: BQ4845S-A4 Real Time Clock
Subcategory: Clock/Timing

BQ4845S-A4 Compliance

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

BQ4845S-A4 Features

  • Clock/Calendar with alarm and watchdog timer.
  • Parallel interface for easy integration.
  • Operates from 4.75V to 5.5V supply.
  • Surface mount 28-SOIC package.
  • Timekeeping current 1.5mA typical.

BQ4845S-A4 Applications

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

BQ4845S-A4 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the BQ4845S-A4?

The main supply voltage is 4.75V to 5.5V. The battery backup supply voltage is 2.3V to 4V.

What package does the BQ4845S-A4 come in?

It comes in a 28-SOIC (0.295", 7.50mm Width) surface mount package. The supplier device package is 28-SOIC.

What is the operating temperature range?

The operating temperature range is 0°C to 70°C.

Is the BQ4845S-A4 RoHS compliant?

The RoHS status is listed as ROHS3 Compliant, but this is unverified and should be treated as low confidence.

What interface does the BQ4845S-A4 use?

It uses a parallel interface.

What features does the BQ4845S-A4 include?

Features include alarm, daylight savings, leap year, supervisor, and watchdog timer.

What is the typical timekeeping current?

The typical timekeeping current is 1.5mA at 4.5V to 5.5V.

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