1339C-31SRI8

Description：IC RTC CLK/CALENDAR I2C 16SOIC
Series：-

SKU:c02149c9cb11 Category: Real Time Clocks Brand: Renesas Electronics Corporation

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Product introduction

Product Detailed Parameters

Description：IC RTC CLK/CALENDAR I2C 16SOIC
Series：-
Package：Tape & Reel (TR)
Mfr：Renesas Electronics Corporation
Type：Clock/Calendar
Features：Alarm, Leap Year, Square Wave Output, Trickle-Charger
Memory Size：-
Time Format：HH:MM:SS (12/24 hr)
Date Format：YY-MM-DD-dd
Interface：I2C, 2-Wire Serial
Voltage - Supply：3.3V ~ 5.5V
Voltage - Supply, Battery：1.3V ~ 3.7V
Current - Timekeeping (Max)：200µA @ 3.63V ~ 5.5V
Operating Temperature：-40°C ~ 85°C
Mounting Type：Surface Mount
Package / Case：16-SOIC (0.295", 7.50mm Width)
Supplier Device Package：16-SOIC

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1339C-31SRI8

Overview

The Renesas 1339C-31SRI8 is a Real-Time Clock (RTC) with an embedded crystal, housed in a 16-SOIC package. It operates on a supply voltage of 3.3V to 5.5V and supports I²C serial interface communication. The device maintains timekeeping current at a maximum of 200µA when powered between 3.63V and 5.5V. It features an alarm function, leap year compensation, square wave output, and a trickle charger. The component is rated for an operating temperature range of -40°C to 85°C and has a status of obsolete.

Feature Summary

Integrated RTC with embedded crystal oscillator
I²C serial interface for data communication
Supports alarm, leap year, and square wave output functions
Trickle charger capability for backup battery maintenance

Applications

Industrial equipment requiring precise timekeeping
Consumer electronics with calendar functionality
Data logging systems needing timestamp accuracy

Procurement Notes

This component is officially listed as obsolete by the manufacturer. Availability is restricted, and sourcing may require checking secondary market distributors or verifying end-of-life notifications. Designers should consider replacement strategies due to discontinuation status.

Selection Notes

Select this part only if legacy compatibility is required, as it is no longer in active production. Verify that the 16-SOIC package fits the PCB layout constraints. Ensure the system design accommodates the specific voltage ranges and I²C protocol requirements documented in the datasheet.

Part Context

The 1339C-31SRI8 belongs to the 1339C series of real-time clocks from Renesas Electronics. It is also identified by the alias IDT1339C-31SRI8, reflecting its history under Integrated Device Technology before acquisition. The '8' suffix typically denotes tape and reel packaging.

Replacement Considerations

As an obsolete component, direct replacements are not guaranteed. Review Renesas's official discontinuation notices for recommended alternative parts within the same family or newer generations that maintain pin and functional compatibility.

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

Payment methods: T/T, WeChat Pay, credit cards, Google Pay, Apple Pay . Buyer covers shipping, fees, duties, and taxes; contact our product manager if you need a contract/procurement process.

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.