BQ4802YPW

$7.67

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

SKU:0ae196f5269e Category: Real Time Clocks Brand: Texas Instruments

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Product introduction

Product Detailed Parameters

Description：IC RTC CLK/CALENDAR PAR 28TSSOP
Series：-
Package：Bulk,Tube
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：4.5V ~ 5.5V
Voltage - Supply, Battery：2.4V ~ 4V
Current - Timekeeping (Max)：1.5mA (Typ) @ 4.5 V ~ 5.5 V
Operating Temperature：0°C ~ 70°C
Mounting Type：Surface Mount
Package / Case：28-TSSOP (0.173", 4.40mm Width)
Supplier Device Package：28-TSSOP

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BQ4802YPW

Overview

The BQ4802YPW is a parallel interface Real-Time Clock (RTC) IC manufactured by Texas Instruments, housed in a 28-TSSOP package. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a battery backup voltage of 2.4 V to 4 V. The device features a date format of YY-MM-DD-dd and time format of HH:MM:SS (12/24 hour). It includes 16 bytes of non-volatile SRAM storage capacity. Typical current consumption is 1.5 mA at 4.5 V to 5.5 V. The component functions as a clock/calendar with alarm capabilities and is rated for commercial temperatures from 0°C to +70°C.

Feature Summary

Parallel RTC interface with 16-byte NV SRAM
Supports Alarm, Calendar, Clock, and NV SRAM Control functions
Includes Daylight Saving Time, Leap Year, Monitor, and Watchdog Timer features

Applications

Industrial systems requiring precise timekeeping
Commercial data logging equipment
Embedded controllers needing calendar and alarm functionality

Procurement Notes

The BQ4802YPW is designated as End-of-Life (EOL). A Product Change Notification indicates discontinuation effective April 15, 2026. Verification of remaining stock availability and final purchase deadlines is required before integration into new designs due to the obsolescence status.

Selection Notes

Designers should verify compatibility with parallel bus architectures, as this component does not use I2C or SPI interfaces. The 28-TSSOP package requires appropriate PCB footprint planning. Given the EOL status, alternative components with similar parallel interfaces and NV SRAM capabilities should be evaluated for long-term supply stability.

Part Context

This part belongs to the BQ4802Y series of real-time clocks. It is distinct from other Texas Instruments RTCs that utilize serial interfaces. The 'P' suffix denotes the TSSOP-28 package variant. Related parts include the BQ4802YDW (SOIC package) and BQ4802YDWR (SOIC tape-and-reel).