S-35730C01I-K8T2U

Programmable Timers And Oscillators Overview

The S-35730C01I-K8T2U is a pin-selectable interval timer IC manufactured by ABLIC Inc. It generates clock pulses at selectable frequencies of 32.768 kHz, 32 Hz, 1.024 kHz, or 1 Hz via SET0 and SET1 pins. The device features a built-in 32.768 kHz crystal oscillation circuit with CL = 6.0 pF capacitors. Operating voltage ranges from 1.8 V to 5.5 V, with typical current consumption of 1.7 μA (ENBL low) and 4.0 μA (ENBL high, output active). It operates within -40°C to +85°C and uses a TMSOP-8 package.

Programmable Timers And Oscillators Feature Summary

• Pin-selectable output frequencies: 32.768 kHz, 32 Hz, 1.024 kHz, and 1 Hz
• Built-in 32.768 kHz quartz crystal oscillation circuit
• Low current consumption: 1.7 μA typ. (standby), 4.0 μA typ. (active)
• Wide operation voltage range: 1.8 V to 5.5 V

Programmable Timers And Oscillators Applications

• IoT communications devices
• Monitoring devices
• Security devices
• Battery systems
• Energy harvesting systems

Programmable Timers And Oscillators Procurement Notes

Verify the ordering suffix K8T2U corresponds to the TMSOP-8 tape packing specification. Confirm the C01 designation matches the required CL = 6.0 pF internal capacitor configuration for the specific quartz crystal used in the design. Ensure ENBL pin handling during power-up meets the 10 ms rise time requirement to 1.8 V.

Programmable Timers And Oscillators Selection Notes

Select this component when a fixed-interval clock signal is required without external microcontroller intervention. The frequency must be set via hardware connections on SET0 and SET1 pins. Verify that the load capacitance requirements of the external quartz crystal align with the internal 6.0 pF capacitors to ensure accurate oscillation frequency.

Programmable Timers And Oscillators Part Context

This part belongs to the S-35730 series of interval timer ICs. The 'C' indicates the internal capacitor value (CL=6.0pF), '01' is the fixed value code, 'I' denotes the industrial temperature range (-40°C to +85°C), and 'K8T2' specifies the TMSOP-8 tape reel packaging.

Programmable Timers And Oscillators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should evaluate other ABLIC interval timers or general-purpose watchdog timers if functional equivalence is required, ensuring voltage and package compatibility.

Programmable Timers And Oscillators FAQ

How is the output frequency selected?

The output frequency is determined by the logic levels applied to the SET0 and SET1 input pins. L/L selects 32.768 kHz, L/H selects 32 Hz, H/L selects 1.024 kHz, and H/H selects 1 Hz.

What is the function of the ENBL pin?

The ENBL pin controls the clock pulse output. When ENBL is High, the FOUT pin outputs the selected clock pulse. When ENBL is Low, the FOUT pin is fixed to Low, stopping the visible output while the oscillator may continue running depending on power state.

What are the power-on requirements for reliable oscillation?

The power supply voltage must rise from 0.2 V or lower to 1.8 V within 10 ms. If this condition is not met, the ENBL pin must be held Low until the voltage reaches 1.8 V, then toggled to initiate oscillation.