S-35720C02I-K8T2U

Programmable Timers And Oscillators Overview

The S-35720C02I-K8T2U is a pin-selectable wake-up timer IC from ABLIC Inc., designed for intermittent system operation. It features a 24-bit binary-up counter that compares internal timer values against settings on the SET0 and SET1 pins to generate an interrupt signal. The device operates within a voltage range of 1.8 V to 5.5 V and consumes 0.2 µA typ. at 3.0 V. It includes a built-in 32.768 kHz crystal oscillation circuit with CL = 6.0 pF capacitors. The INT pin provides a CMOS output, and the unit functions in temperatures from −40°C to +85°C.

Programmable Timers And Oscillators Feature Summary

• Pin-selectable interrupt times: 1 s, 10 s, 30 s, or 60 s via SET0/SET1 inputs
• Low current consumption: 0.2 µA typ. (VDD = 3.0 V)
• Built-in 32.768 kHz oscillator with integrated load capacitors (CL = 6.0 pF)
• CMOS output on INT pin with one-shot loop time-out functionality

Programmable Timers And Oscillators Applications

• IoT communications devices
• Monitoring systems
• Security devices
• Battery-powered systems
• Energy harvesting applications

Programmable Timers And Oscillators Procurement Notes

Verify the ordering suffix K8T2U corresponds to the TMSOP-8 tape packing specification. Confirm the 'C' designation indicates the specific quartz crystal load capacitance of 6.0 pF required for the application. Ensure the 'I' suffix matches the industrial temperature range of −40°C to +85°C. Check RoHS compliance status as lead-free and halogen-free.

Programmable Timers And Oscillators Selection Notes

Select this model over the S-35720C01I variant if a CMOS output is required instead of an Nch open-drain output. The S-35720C02I eliminates the need for external pull-up resistors on the INT pin. Verify that the desired wake-up interval (1s, 10s, 30s, or 60s) can be achieved by configuring the SET0 and SET1 pins appropriately.

Programmable Timers And Oscillators Part Context

This component belongs to the S-35720 Series of wake-up timer ICs. It shares the same core timer architecture and low-power characteristics as other variants in the series, differing primarily in output configuration (CMOS vs. Open-drain) and package/packing specifications. It serves as a power management peripheral for microcontroller-based systems requiring periodic wake-ups.

Programmable Timers And Oscillators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should evaluate other ABLIC S-35720 variants (e.g., S-35720C01I) for functional compatibility regarding pinout and timing logic, noting the output type difference.

Programmable Timers And Oscillators FAQ

What is the default interrupt time setting?

The interrupt time is not fixed; it is determined by the logic levels applied to the SET0 and SET1 pins. Valid settings are 1 s, 10 s, 30 s, or 60 s.

How does the S-35720C02I handle the INT pin output?

It uses a CMOS output structure, providing both high and low drive capabilities without requiring an external pull-up resistor, unlike the open-drain variant.

Is an external crystal required?

Yes, a 32.768 kHz quartz crystal must be connected between the XIN and XOUT pins. The IC has internal capacitors sized for a 6.0 pF load crystal.