S-35390A-J8T1G

Real Time Clock Overview

The S-35390A-J8T1G is a CMOS 2-wire real-time clock IC manufactured by ABLIC Inc. It operates within a wide voltage range of 1.3 V to 5.5 V, supporting both main supply and backup battery applications. The device features low current consumption of 0.25 µA typical at 3.0 V during timekeeping. It includes an internal 32.768 kHz crystal oscillation circuit with built-in capacitance, requiring only an external capacitor on the XIN pin. Key specifications include an operating temperature range of -40°C to +85°C, I²C-bus interface compatibility, and auto-calendar functionality up to the year 2099 with leap year calculation.

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 clock correction function for frequency deviation compensation
• 2-wire (I²C-bus) CPU interface with standard communication protocols

Real Time Clock Applications

• Mobile game devices
• Digital still cameras
• Electronic power meters
• TV and VCR systems

Real Time Clock Procurement Notes

Verify that the ordering suffix J8T1 corresponds to the 8-Pin SOP (JEDEC) package in tape format. Confirm the environmental code G indicates lead-free composition as specified in the product name structure documentation. Ensure compatibility with system voltage levels before integration.

Real Time Clock Selection Notes

Select this component when a compact real-time clock solution with minimal external components is required. The built-in oscillator eliminates the need for an external quartz crystal, reducing board space. Verify that the application supports I²C communication and requires operation across the -40°C to +85°C temperature range.

Real Time Clock Part Context

This part belongs to the S-35390A series of real-time clocks from ABLIC Inc. The J8T1 designation specifies the physical package as 8-Pin SOP (JEDEC) with tape packing. The G suffix denotes the environmental compliance status regarding lead content. This model is designed for portable electronics requiring precise timekeeping with low power drain.

Real Time Clock Replacement Considerations

Direct substitutes may include other ABLIC RTC models with similar I²C interfaces and voltage ranges. Verify pin compatibility and register mapping if replacing with different manufacturers' parts. Ensure the replacement supports the required 1.3 V to 5.5 V operating range and has comparable current consumption characteristics.