S21805T-32.768K-R

Oscillators Overview

The S21805T-32.768K-R is a crystal oscillator (XO) manufactured by Aker Technology Corp, operating at a nominal frequency of 32.768 kHz. It utilizes HCMOS output logic and supports a supply voltage of 1.8V. The device features an enable/disable control function for power management. It is housed in a compact 4-SMD, no lead package, designed for surface-mount assembly on printed circuit boards.

Oscillators Feature Summary

• HCMOS output interface for digital timing applications
• Integrated enable and disable control functionality
• Compact 4-SMD no-lead surface mount package design

Oscillators Applications

• Real-time clock circuits requiring precise timekeeping
• Low-frequency digital system timing references
• Embedded microcontroller clock sources

Oscillators Procurement Notes

Verify the specific ordering suffix to confirm the exact frequency tolerance, load capacitance, and output waveform specifications. Ensure the selected variant matches the required supply voltage and package dimensions for the target PCB layout. Cross-reference the manufacturer's latest datasheet to confirm active status and availability before finalizing procurement orders.

Oscillators Selection Notes

Select this component when a low-frequency, low-power HCMOS oscillator is required for timekeeping or synchronization tasks. Consider the 1.8V supply constraint and the need for software-controllable enable/disable features. Evaluate the 4-SMD footprint against available board space and ensure compatibility with automated pick-and-place manufacturing processes.

Oscillators Part Context

This part belongs to the S21805T series of standard crystal oscillators from Aker Technology Corp. The series offers various frequencies and packaging options. The S21805T-32.768K-R specifically targets applications needing a stable 32.768 kHz reference signal with minimal power consumption and small physical size.

Oscillators Replacement Considerations

Direct substitutes include other 32.768 kHz HCMOS oscillators in 4-SMD packages from manufacturers such as Epson, NDK, or Seiko Instruments. Verify pinout compatibility, voltage levels, and enable logic polarity before substitution.