SNJ54LS164J

Overview

The SNJ54LS164J is a military-grade, 8-bit serial-in, parallel-out shift register manufactured by Texas Instruments. It operates within a supply voltage range of 4.75 V to 5.25 V and supports an operating temperature range from -55 °C to +125 °C. The device utilizes the LS TTL logic family and features two serial data inputs (A and B) that are internally ANDed. It includes a dedicated clear input for resetting all flip-flops to a low state. The component is housed in a hermetically sealed ceramic dual in-line package with 14 pins.

Feature Summary

• Provides eight-bit serial-to-parallel data conversion capability
• Features internally ANDed dual serial data inputs for logical gating
• Includes a direct asynchronous clear function for immediate reset
• Constructed with hermetically sealed ceramic packaging for environmental protection

Applications

• Military and defense electronic systems requiring radiation-hardened or high-reliability components
• Space-based applications utilizing QML certified devices
• Industrial control systems operating in extreme temperature environments
• Data acquisition systems requiring serial-to-parallel interface conversion

Procurement Notes

Verify the specific ordering suffix against the Package Option Addendum to confirm the exact pin count and package style, as the SNJ54LS164 series spans multiple configurations including CDIP, CFP, and LCCC. Ensure the procurement request explicitly states the required military qualification level, as standard catalog versions differ from the space-qualified or military-specific variants listed in the manufacturer's documentation.

Selection Notes

Select this component when designing systems that require robust serial-to-parallel shifting under harsh environmental conditions. The LS logic family offers a balance of speed and power consumption suitable for general-purpose digital logic. Consider the physical dimensions of the available ceramic packages during the PCB layout phase to ensure compatibility with the chosen mounting method and enclosure constraints.

Part Context

This part belongs to the SN54LS164 family of shift registers. The 'SNJ' prefix indicates a military-grade version produced under strict quality controls. Related parts include the commercial SN74LS164 and the space-qualified SN54LS164-SP. All variants share the same logical functionality but differ in manufacturing standards, testing requirements, and packaging materials to suit their respective operational environments.

Replacement Considerations

Direct replacements must match the LS logic family and 14-pin CDIP package. Verify that substitute parts meet the same -55 °C to +125 °C temperature range and hermetic sealing requirements. Cross-reference with other manufacturers offering MIL-STD qualified 8-bit shift registers if TI stock is unavailable.