STCL132KRDEAW89

Programmable Timers And Oscillators Overview

The STCL132KRDEAW89 is a fixed-frequency silicon oscillator manufactured by STMicroelectronics, designed to replace traditional 32.768 kHz crystals in low-speed microprocessor clock applications. It operates within a supply voltage range of 1.65 V to 1.95 V and delivers a CMOS-compatible push-pull square wave output. The device features an active-high chip enable input with an internal 150 kΩ pull-down resistor, allowing for significant current reduction during power-saving modes. Operating temperatures span from –30 °C to +85 °C, with frequency accuracy specified at ±1.2% across the full temperature range.

Programmable Timers And Oscillators Feature Summary

• Fixed 32.768 kHz frequency with ±1.2% accuracy over –30 °C to +85 °C
• Low operating current (typical 60 µA) and ultra-low standby current (1 µA)
• Active-high Chip Enable (CE) input with internal 150 kΩ pull-down
• Fast startup time (typical 90 µs) without external components

Programmable Timers And Oscillators Applications

• Low-speed microprocessor clock generation
• Display driver timing circuits
• Applications requiring multiple inputs to share a common clock source

Programmable Timers And Oscillators Procurement Notes

This component is officially classified as obsolete by STMicroelectronics. Verification of availability should focus on distributor surplus stock or secondary market channels rather than direct manufacturer allocation. Designers must confirm that existing inventory meets specific lot codes and storage conditions prior to procurement.

Programmable Timers And Oscillators Selection Notes

Select this part when replacing a 32.768 kHz crystal in systems where tighter clock accuracy is not critical. Ensure the design supports the 1.65 V to 1.95 V supply range. The CE pin must be managed correctly; if unused, it requires a logic high level to maintain operation, leveraging its internal pull-down resistor.

Programmable Timers And Oscillators Part Context

The STCL132K series includes variants for different voltage ranges, such as the STCL132KWxxx for 2.7 V to 3.6 V operation. The 'R' suffix specifically denotes the 1.65 V to 1.95 V version. This device belongs to a family of silicon oscillators developed to offer faster startup and improved immunity to shock and vibration compared to mechanical resonators.

Programmable Timers And Oscillators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, alternative sourcing relies on identifying compatible silicon oscillators with matching 32.768 kHz frequency, SC70-5L package, and similar electrical characteristics.