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Product Detailed Parameters
- Description：D LATCH, LS SERIES TTL
- Series：*
- Mfr：Texas Instruments
- Package：Bulk
- Logic Type：-
- Circuit：-
- Output Type：-
- Voltage - Supply：-
- Independent Circuits：-
- Delay Time - Propagation：-
- Current - Output High, Low：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The SNJ54LS259BFK is a D-type addressable latch from the LS series of Transistor-Transistor Logic (TTL). It features a single function with one-bit true output and low-level triggering. The device utilizes a CQCC20 package, also identified as QLCC or LCCC20, containing 20 terminals. It operates within a temperature range of -55°C to 125°C. The component is classified under logic integrated circuits and is manufactured by Texas Instruments.
Feature Summary
- Addressable D-type latch functionality with low-level triggering mechanism
- Single-function design providing one-bit true output
- Compatible with LS series TTL logic standards
Applications
- Digital data storage in addressable memory systems
- Input/output interface buffering for TTL logic circuits
- State retention in industrial control logic modules
Procurement Notes
Verify the specific suffix 'FK' against official Texas Instruments documentation to confirm the exact package variant and material composition. Ensure compatibility with existing board layouts requiring the CQCC20 footprint. Confirm that the low-level trigger behavior aligns with system timing requirements before integration into final designs.
Selection Notes
Select this component when an addressable latch with TTL compatibility is required for harsh environments due to its extended temperature range. Consider the LS series speed-power trade-offs relative to system clock speeds. Verify pinout alignment with the CQCC20 package specification to ensure correct signal routing during PCB layout.
Part Context
This part belongs to the SNJ54LS family, representing military-grade or high-reliability variants of standard logic components. The 'SNJ' prefix typically denotes ceramic packaging suitable for demanding conditions. It serves as a fundamental building block for sequential logic circuits requiring addressable data latching capabilities within larger digital systems.
Replacement Considerations
Cross-reference with other LS-series addressable latches such as the SN54LS373 or SN54LS374 if pinout compatibility allows. Verify electrical characteristics and package dimensions against potential substitutes to ensure functional equivalence without redesigning the host circuit board.
