BU9873FVT-GE2

$1.59

Description：IC RTC CLK/CALENDAR I2C 8TSSOP
Series：-

SKU:2211c6e68683 Category: Real Time Clocks Brand: Rohm Semiconductor

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Product introduction

Product Detailed Parameters

Description：IC RTC CLK/CALENDAR I2C 8TSSOP
Series：-
Package：Tape & Reel (TR),Cut Tape (CT)
Mfr：Rohm Semiconductor
Type：Clock/Calendar
Features：Alarm, Leap Year
Memory Size：-
Time Format：HH:MM:SS (12/24 hr)
Date Format：YY-MM-DD-dd
Interface：I2C, 2-Wire Serial
Voltage - Supply：1.8V ~ 5.5V
Voltage - Supply, Battery：-
Current - Timekeeping (Max)：1µA ~ 1.35µA @ 3V ~ 5.5V
Operating Temperature：-40°C ~ 85°C
Mounting Type：Surface Mount
Package / Case：8-TSSOP (0.173", 4.40mm Width)
Supplier Device Package：8-TSSOP-B

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BU9873FVT-GE2

Overview

The BU9873FVT-GE2 is a CMOS Real-Time Clock (RTC) manufactured by ROHM Semiconductor, featuring an I²C bus serial interface. It supports date formats of YY-MM-DD-dd and time formats in both 12-hour and 24-hour modes (HH:MM:SS:hh). The device operates within a supply voltage range of 1.8 V to 5.5 V and functions across a temperature range of -40°C to +85°C. It is housed in a TSSOP-B-8 package with SMD/SMT mounting style. The component does not include battery backup switching capabilities.

Feature Summary

I²C Bus Serial Interface for CPU communication
High-precision oscillation adjustment circuit
Automatic leap year recognition up to the year 2099

Applications

General-purpose real-time clocking in embedded systems
Data logging devices requiring precise timekeeping
Consumer electronics with I²C connectivity

Procurement Notes

This component is classified as End-of-Life (EOL). A discontinuation notification was issued on April 25, 2025. Mouser currently reports that the product is not sold in certain regions due to this status. Verification of final availability through authorized distributors or remaining stock holders is required before design finalization.

Selection Notes

Designers should verify compatibility with the target I²C bus speed, as the device supports access frequencies up to 400 kHz. Ensure the power supply remains within the 1.8 V to 5.5 V range during operation. Consider the TSSOP-B-8 package dimensions (3.0x6.4 mm implied by similar ROHM packages, though specific footprint data is limited in the provided text) for PCB layout constraints.

Part Context

The BU9873FVT-GE2 belongs to the BU9873 series of RTCs from ROHM Semiconductor. It shares functional similarities with other models like the BU9873FJ but differs in packaging (TSSOP-B-8 vs SOP-J8). It is categorized under Clock & Timer ICs and utilizes CMOS technology.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Due to the EOL status, alternative RTCs with I²C interfaces and similar voltage ranges must be evaluated based on pin compatibility and software register mapping.

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

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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.