STCL132KWDEAW89

Programmable Timers And Oscillators Overview

The STCL132KWDEAW89 is a fixed-frequency silicon oscillator generating a 32.768 kHz square wave output. Designed for low-power applications, it operates within a supply voltage range of 2.7 V to 3.6 V and consumes a typical active current of 85 µA. The device features a chip enable input with an internal pull-down resistor, allowing for significant standby current reduction. It provides ±1.2% frequency accuracy over the –30 °C to +85 °C temperature range and requires no external components. Packaged in a compact SC70-5L (SOT-323-5) form factor, it offers fast startup times and improved immunity to shock and vibration compared to traditional crystal oscillators.

Programmable Timers And Oscillators Feature Summary

• Fixed 32.768 kHz frequency with ±1.2% accuracy across –30 °C to +85 °C
• Operates on 2.7 V to 3.6 V supply with 85 µA typical active current
• Chip enable input reduces standby current to 1 µA
• Fast startup time typically under 120 µs
• SC70-5L surface-mount package

Programmable Timers And Oscillators Applications

• Low-speed microprocessor clock sources
• Display driver timing
• Systems requiring multiple inputs to share a common clock source

Programmable Timers And Oscillators Procurement Notes

This component is classified as obsolete by the manufacturer. Verification of availability should focus on distributor surplus or secondary market channels rather than direct manufacturing orders. Designers must confirm end-of-life status and potential lead times associated with remaining stock before finalizing procurement plans.

Programmable Timers And Oscillators Selection Notes

Select the STCL132KW variant specifically when the system power supply operates between 2.7 V and 3.6 V. For lower voltage applications ranging from 1.65 V to 1.95 V, the STCL132KR series is required. Ensure the design accommodates the single-ended push-pull CMOS output and utilizes the chip enable pin if power-saving modes are implemented.

Programmable Timers And Oscillators Part Context

The STCL132K family serves as a drop-in replacement for 32.768 kHz crystals in microcontroller clock circuits. The 'W' suffix denotes the 2.7–3.6 V operating voltage range, distinguishing it from the 'R' suffix version designed for 1.65–1.95 V systems. Both variants share identical pinouts and functional characteristics except for supply voltage constraints.

Programmable Timers And Oscillators Replacement Considerations

No officially confirmed substitute part numbers are documented in the provided datasheet. Due to the obsolete status, alternative silicon oscillators from other manufacturers may require schematic review to ensure compatibility with the 2.7–3.6 V supply range and SC70-5L footprint.