BQ4802LYDWRG4

$3.25

Description：IC RTC CLK/CALENDAR PAR 28SOIC
Series：-

SKU:906afbefddb7 Category: Real Time Clocks Brand: Texas Instruments

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Product introduction

Product Detailed Parameters

Description：IC RTC CLK/CALENDAR PAR 28SOIC
Series：-
Package：Tape & Reel (TR)
Mfr：Texas Instruments
Type：Clock/Calendar
Features：Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer
Memory Size：-
Time Format：HH:MM:SS (12/24 hr)
Date Format：YY-MM-DD-dd
Interface：Parallel
Voltage - Supply：2.7V ~ 3.6V
Voltage - Supply, Battery：2.4V ~ 4V
Current - Timekeeping (Max)：1.5mA (Typ) @ 2.7 V ~ 3.6 V
Operating Temperature：0°C ~ 70°C
Mounting Type：Surface Mount
Package / Case：28-SOIC (0.295", 7.50mm Width)
Supplier Device Package：28-SOIC

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BQ4802LYDWRG4

Overview

The BQ4802LYDWRG4 is a parallel real-time clock (RTC) integrated circuit manufactured by Texas Instruments. It provides timekeeping and calendar functions in a 28-pin SOIC package. The device operates with a main supply voltage of 4.5V to 5.5V and supports a backup battery voltage range of 2.4V to 4V. Typical current consumption during timing operation is 1.5mA at the nominal supply voltage. The component includes features such as alarms, daylight saving time adjustment, leap year compensation, and CPU supervision.

Feature Summary

Parallel RTC interface for direct connection to system buses
Integrated CPU supervisor function for system monitoring
Automatic leap year correction up to the year 2099
Supports both 12-hour and 24-hour time formats

Applications

Industrial control systems requiring precise timekeeping
Data logging equipment needing calendar tracking
Telecommunications infrastructure with backup power requirements
Embedded systems utilizing parallel bus architectures

Procurement Notes

Verify the specific suffix 'LY' against official Texas Instruments documentation to confirm material or temperature grade specifications. Confirm availability status as some variants may be subject to production changes. Ensure compatibility with existing PCB footprints for the 28-SOIC package before ordering.

Selection Notes

Select this component when a parallel interface is required for the RTC function. Verify that the system can support the 4.5V to 5.5V logic levels. Consider the 1.5mA typical current draw for power budget calculations. Ensure the design accommodates the 28-SOIC package dimensions and pinout configuration.

Part Context

This part belongs to the BQ4802 family of parallel RTCs from Texas Instruments. It shares functional similarities with other members like the BQ4802YDW but may differ in specific material or environmental ratings indicated by the suffix. It serves as a dedicated timekeeping solution for microprocessor-based systems.

Replacement Considerations

Direct replacements should be sought within the BQ4802 family. Verify pin-to-pin compatibility and electrical parameter alignment. Cross-reference with equivalent parts from other manufacturers only if interface and voltage requirements match exactly.

How to buy

Online and offline orders are supported. If the item is available for online purchase, you can place it in the cart; for wholesale pricing, please contact our product manager for a quote.

Payment Method

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Delivery time

In-stock items usually ship within 24 hours. Otherwise, shipment is arranged 1 to 2 days after the items arrive at our warehouse. Timing depends on destination and shipping method.

Freight calculation

Freight cost depends on destination, package size, and weight . We offer shipping options via DHL, FedEx, UPS, and TNT , and can ship using your freight account upon request.

Mode of Transportation

We ship via DHL, FedEx, UPS, and TNT. If you prefer a specific logistics provider, we can ship using your designated carrier.

Return and Refund

Returns are accepted within 60 days of invoice with RMA approval. Items must be resalable; original invoice and test report are required. No returns for customer errors.