SNJ54LS628J

Programmable Timers And Oscillators Overview

The SNJ54LS628J is a voltage-controlled oscillator (VCO) from the Texas Instruments SN54LS62x series, housed in a 14-pin ceramic dual in-line package (CDIP). It operates within a supply voltage range of 4.5 V to 5.5 V and supports an extended temperature range of -55°C to 125°C. The device features a frequency control input that allows for linear modulation of the output frequency. Key electrical characteristics include a typical propagation delay of 15 ns and a maximum output current capability of 24 mA. This component is designed for military and aerospace applications requiring hermetic sealing and high reliability.

Programmable Timers And Oscillators Feature Summary

• Voltage-Controlled Oscillator with linear frequency modulation via a single control input
• Hermetically sealed 14-lead Ceramic Dual In-Line Package (CDIP)
• Extended operating temperature range from -55°C to +125°C
• Compatible with standard TTL logic families

Programmable Timers And Oscillators Applications

• Military communication systems requiring stable frequency generation
• Aerospace telemetry and signal processing circuits
• Frequency synthesis and modulation applications
• Test and measurement equipment operating in extreme environments

Programmable Timers And Oscillators Procurement Notes

Verify the specific ordering suffix 'J' confirms the 14-lead CDIP package configuration. Confirm RoHS exemption status as indicated by the 'No' designation in official documentation. Ensure the supplier provides traceability documentation suitable for military or defense procurement requirements. Check for any specific handling instructions related to hermetic ceramic packages.

Programmable Timers And Oscillators Selection Notes

Select the SNJ54LS628J when a hermetically sealed VCO is required for harsh environmental conditions. Compare against the SN74LS628J if commercial temperature ranges are sufficient. Consider the SNJ54LS629J if additional pin configurations or specific timing characteristics differ from project needs. Verify power supply stability requirements align with the 4.5 V to 5.5 V operational window.

Programmable Timers And Oscillators Part Context

This component belongs to the SN54LS624 through SN54LS629 family of voltage-controlled oscillators manufactured by Texas Instruments. The 'SNJ' prefix denotes a military-grade part with a ceramic DIP package. It shares functional similarities with other members of the LS series but is distinct in its specific oscillator circuitry and pinout configuration compared to logic gates or flip-flops.

Programmable Timers And Oscillators Replacement Considerations

Direct replacements include the SN54LS628FK (LCCC package) or SNJ54LS628J.A (same package, potential manufacturing lot variation). Cross-reference with SN74LS628 variants only if non-military specifications and plastic packaging are acceptable.