54L75J/C

Overview

The SN54L75J/C is a dual D-type flip-flop manufactured by Rochester Electronics, LLC. It belongs to the L-Series of TTL logic devices and features inverted outputs. The component is housed in a CDIP16 ceramic package with glass sealing, designed for military-grade reliability. It operates over an extended temperature range from -55°C to 125°C. The device requires a supply voltage between 4.5 V and 5.5 V, with a nominal rating of 5 V. Propagation delay is specified at 38 ns. This part is intended for high-reliability applications requiring robust digital storage capabilities under extreme environmental conditions.

Feature Summary

• Dual D-type flip-flop configuration with inverted outputs
• Military-grade operation across -55°C to 125°C temperature range
• CDIP16 ceramic package with glass-sealed construction
• LS-series TTL technology with 38 ns propagation delay

Applications

• Military aerospace systems requiring high-temperature stability
• Industrial control systems operating in harsh environments
• High-reliability digital data storage circuits

Procurement Notes

Verify the specific lot traceability and quality certification level (e.g., MIL-PRF-38535 Class Q or K) directly with the supplier, as these details are not explicitly defined in the provided product fields. Confirm that the CDIP16 ceramic package matches the mechanical constraints of the target assembly. Ensure the supply voltage requirements align with the system's power delivery network before integration.

Selection Notes

Select this component when dual D-type flip-flops are required for military or industrial applications demanding wide temperature tolerance. The ceramic DIP package offers superior hermeticity compared to plastic alternatives. Consider the 38 ns propagation delay against system timing requirements. Verify compatibility with standard TTL logic levels and ensure the 5V supply rail is stable within the 4.5V to 5.5V window for optimal performance.

Part Context

Rochester Electronics specializes in sourcing and distributing obsolete and hard-to-find semiconductors. The 54L75J/C is part of their portfolio of legacy TTL components, often sourced from original manufacturers or recreated using original intellectual property. These parts are typically targeted at defense, aerospace, and medical markets where long-term availability and reliability are critical.

Replacement Considerations

Direct pin-compatible replacements include other SN54L75 variants from different manufacturers, provided they meet the same military temperature range and ceramic package specifications. Ensure any substitute maintains the inverted output polarity and LS-series electrical characteristics.