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Product Detailed Parameters
- Description：BINARY COUNTER, LS SERIES
- Series：*
- Mfr：Texas Instruments
- Package：Bulk
- Logic Type：-
- Direction：-
- Number of Elements：-
- Number of Bits per Element：-
- Reset：-
- Timing：-
- Count Rate：-
- Trigger Type：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Voltage - Supply：-
- Grade：-
- Qualification：-
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Overview
The SNJ54LS593FK is an LS series asynchronous positive edge-triggered 8-bit up binary counter manufactured by Texas Instruments. It features a ceramic quad flatpack (CQCC) package with 20 pins, designed for hermetic sealing in military and aerospace environments. The device operates within a temperature range of -55 °C to 125 °C and supports registered inputs with multiplexed I/O capabilities.
Feature Summary
- Asynchronous positive edge-triggered counting mechanism
- Hermetically sealed ceramic construction for harsh environments
- Multiplexed input/output configuration
Applications
- Military avionics systems requiring radiation-hardened logic
- Aerospace telemetry data processing
- High-reliability industrial control counters
Procurement Notes
Verify the specific suffix 'FK' against official Texas Instruments documentation to confirm the exact pinout and hermetic seal specifications for the CQCC-20 package. Ensure compatibility with existing board layouts due to the distinct footprint compared to standard DIP variants. Confirm environmental qualification levels required for the intended deployment scenario.
Selection Notes
Select this component when high reliability and radiation tolerance are critical, as indicated by the ceramic packaging and military temperature range. Compare against plastic equivalents if environmental sealing is not required. Verify that the asynchronous operation mode aligns with system timing requirements, as it differs from synchronous counter designs.
Part Context
This part belongs to the Texas Instruments SN54LS family, which provides standard logic functions optimized for military-grade performance. The SN54 series typically denotes higher reliability standards than the commercial SN74 series. The LS designation indicates Low-power Schottky technology, balancing speed and power consumption for robust digital applications.
Replacement Considerations
Direct replacements include other hermetic ceramic versions of the 54LS593, such as the SNJ54LS593J or SNJ54LS593W, provided the package type matches the design constraints. Cross-reference with SN54LS591FK if open-collector outputs are acceptable instead of the standard buffered outputs.
