S-35390AH-T8T2U

Real Time Clock Overview

The S-35390AH-T8T2U is an automotive-grade, 105°C operation CMOS 2-wire real-time clock IC from ABLIC Inc. It operates within a wide voltage range of 1.3 V to 5.5 V and features low current consumption of 0.25 µA typ. at 3.0 V during timekeeping. The device includes a built-in 32.768 kHz crystal oscillation circuit with internal capacitance, an auto-calendar function up to the year 2099 with leap year calculation, and a clock correction register for frequency deviation compensation. It communicates via a standard I²C-bus interface and provides two interrupt pins (INT1, INT2) for alarms or periodic signals.

Real Time Clock Feature Summary

• Low current consumption: 0.25 µA typ. (VDD = 3.0 V, Ta = +25°C)
• Wide operating voltage range: 1.3 V to 5.5 V
• Built-in 32.768 kHz crystal oscillation circuit with internal capacitor
• Auto-calendar function up to the year 2099 with automatic leap year calculation
• Clock correction function for temperature-induced frequency deviations

Real Time Clock Applications

• Vehicle equipment and in-vehicle systems requiring 105°C operation
• Backup battery-powered systems utilizing free registers for user memory
• Automotive infotainment and instrument clusters needing precise timekeeping
• Systems requiring alarm interrupts or periodic flag generation via I²C interface

Real Time Clock Procurement Notes

Verify that the specific application involves vehicle or in-vehicle equipment, as direct usage requires contacting ABLIC Inc. for approval. Confirm the package type matches the TSSOP-8 form factor indicated by the suffix. Ensure compliance with AEC-Q100 Grade 2 requirements if specified for the target automotive environment.

Real Time Clock Selection Notes

Select this component when an I²C real-time clock with integrated oscillator and high-temperature capability (up to 105°C) is required. The T8T2 suffix denotes the 8-Pin TSSOP package with tape packing. Consider the built-in clock correction feature if ambient temperature variations affect timing accuracy without external sensors.

Real Time Clock Part Context

This part belongs to the S-35390A H Series, designed specifically for automotive applications with extended temperature ranges. The 'H' indicates the -40°C to +105°C operating temperature grade. The 'T8T2' suffix specifies the 8-Pin TSSOP package and tape packing format. It is lead-free and halogen-free compliant.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Contact ABLIC Inc. sales office for details on AEC-Q100 reliability specifications and potential alternatives.