ISL1208IRT8Z

Real Time Clock Overview

The ISL1208IRT8Z is a low-power real-time clock (RTC) and calendar 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 draws 4µA to 6µA at 3V to 5V. The component is housed in an 8-TDFN (3x3mm) package with a bare pad and supports an operating temperature range from -40°C to +85°C.

Real Time Clock Feature Summary

• I2C Serial Interface: Supports 400kHz data transfer rate for efficient communication.
• Calendar and Clock: Tracks time and date with automatic leap year correction through 2099.
• Battery Backup Switching: Includes intelligent battery backup switching and power failure detection.
• SRAM Storage: Provides 2 bytes of battery-backed user SRAM.

Real Time Clock Applications

• Three-phase PFC inverters
• LoRaWAN street light controllers for AC loads
• High-efficiency electromagnetic heaters

Real Time Clock Procurement Notes

The ISL1208IRT8Z is listed as End-of-Life (EOL) by the manufacturer. Availability is restricted, and distributors may not stock this item in all regions. Verification of current stock status and alternative sourcing channels is required before procurement planning.

Real Time Clock Selection Notes

Select this component when an I2C-connected RTC with battery-backed SRAM and automatic backup switching is required. Ensure the design accommodates the 8-TDFN package dimensions and the 2.7V to 5.5V VCC supply range. Verify compatibility with the external 32.768kHz crystal oscillator requirements.

Real Time Clock Part Context

This part belongs to the ISL1208 series of real-time clocks. It shares pinout compatibility with ST M41Txx and Maxim DS13xx devices, facilitating potential drop-in replacements in existing designs that utilize those legacy components.

Real Time Clock Replacement Considerations

The ISL1208IU8Z is identified as a possible replacement or related variant within the same product family. Designers should verify specific electrical characteristics and pinout compatibility against the original datasheet before substitution.