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Product Detailed Parameters
- Description：IC RTC CLK/CALENDAR I2C 8MSOP
- Series：-
- Package：Tape & Reel (TR)
- Mfr：Renesas Electronics Corporation
- Type：Clock/Calendar
- Features：Leap Year, NVSRAM, Square Wave Output
- Memory Size：56B
- 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)：5µA @ 3.63V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Supplier Device Package：8-MSOP
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Overview
The Renesas 1338-31DVGI8 is a Real-Time Clock (RTC) IC featuring an I2C serial interface. It integrates a battery-backed non-volatile SRAM with a storage capacity of 56 bytes, supporting data retention during power loss. The device operates within a supply voltage range of 3.3V to 5.5V and accepts a backup battery voltage between 1.3V and 3.7V. It provides timekeeping in HH:MM:SS format (12/24-hour) and date formatting as YY-MM-DD-dd, including leap year compensation. The component is housed in an 8-SOIC package and functions within an industrial temperature range of -40°C to +85°C.
Feature Summary
- Integrated 56-byte Non-Volatile SRAM for persistent data storage
- I2C 2-wire serial interface for communication
- Hardware leap year compensation up to 2099
- Square wave output capability
Applications
- Data logging systems requiring timestamp preservation
- Industrial control equipment operating in harsh environments
- Battery-powered devices needing low-power timekeeping
Procurement Notes
Verify the specific suffix '8' indicates tape-and-reel packaging when sourcing. Confirm RoHS compliance status and Moisture Sensitivity Level (MSL) ratings prior to assembly planning. Ensure the selected distributor provides official datasheets matching the exact part number to avoid confusion with similar variants in the 1338 series.
Selection Notes
Select this component when both RTC functionality and non-volatile memory are required in a single package. Verify that the system's I2C bus speed is compatible with the device specifications. Ensure the available board space accommodates the 8-SOIC package dimensions and that the operating temperature range meets the application's environmental requirements.
Part Context
This part belongs to the Renesas 1338 series of real-time clocks. It shares core functionalities with other variants such as the 1338-31DCGI8 but differs in packaging and reel configuration. The series is designed for applications requiring reliable timekeeping and data retention without external memory components.
Replacement Considerations
Direct substitutes include the 1338-31DCGI8, though packaging differences must be accounted for. Other members of the 1338 family may offer pin-compatible alternatives if memory size or interface requirements align.
