ISL1208IU8Z

Real Time Clock Overview

The ISL1208IU8Z-T7A is a low-power real-time clock (RTC) IC manufactured by Renesas Electronics Corporation. It features an I2C interface with a maximum data transfer rate of 400kHz. The device tracks time in hours, minutes, and seconds, and includes calendar registers for date, month, year, and day of the week, accurate through 2099 with automatic leap year correction. It operates within a supply voltage range of 2.7V to 5.5V and consumes 4µA to 6µA at 3V to 5V. The component is housed in an 8-MSOP package.

Real Time Clock Feature Summary

• I2C Interface: Supports 400kHz data transfer rate for efficient communication.
• Calendar Functionality: Tracks time and date with automatic leap year correction through 2099.
• Battery Backup: Includes automatic backup switching to battery or super capacitor upon power failure detection.
• Integrated SRAM: Provides 2 bytes of battery-backed user SRAM.

Real Time Clock Applications

• Utility Meters
• HVAC Equipment
• Set-Top Box/Television

Real Time Clock Procurement Notes

Verify the specific suffix (e.g., -T7A) against the required packaging format, as the base part number may correspond to tube packaging while the suffix indicates tape and reel. Confirm RoHS compliance status via the official datasheet before procurement. Ensure the supplier provides valid traceability documentation for this Renesas product.

Real Time Clock Selection Notes

Select the ISL1208IU8Z variant when an 8-lead MSOP package is required for space-constrained designs. Compare against the ISL1208IRT8Z if a TDFN package is preferred. Verify that the 2-byte SRAM capacity meets application needs, as other models in the series offer larger storage options.

Real Time Clock Part Context

The ISL1208 belongs to the ISL1208 family of low-power RTCs from Renesas. It shares pin compatibility with ST M41Txx and Maxim DS13xx devices, facilitating drop-in replacements in existing designs. The series offers various package options including SOIC, MSOP, and TDFN to suit different board layout requirements.

Real Time Clock Replacement Considerations

The ISL1208IU8Z is listed as a potential replacement for the discontinued ISL1208IRT8Z. Designers should verify package dimensions and pinout compatibility before substitution.