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Product Detailed Parameters
- Description：DECADE COUNTERS
- Series：*
- Mfr：Rochester Electronics, LLC
- 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 SN54LS196W/B is a high-speed low-power Schottky synchronous 4-bit binary counter with parallel load, manufactured by Rochester Electronics. It operates over the full military temperature range of -55°C to 125°C and utilizes a 16-pin ceramic flat package (FP). The device features independent clock inputs for each stage, allowing flexible cascading configurations. It supports asynchronous clear and synchronous parallel loading functions, making it suitable for complex digital timing and counting applications in harsh environments.
Feature Summary
- Synchronous 4-bit binary counting capability with independent clock inputs per stage
- Full military temperature range operation from -55°C to 125°C
- High-speed low-power Schottky (LS) logic technology
- Asynchronous clear and synchronous parallel load functions
Applications
- Military aerospace digital timing circuits
- Harsh environment frequency division networks
- Industrial control system counters
- Spacecraft telemetry data processing
Procurement Notes
Verify component authenticity through official manufacturer documentation or authorized distributor channels. Confirm that the part meets MIL-PRF-38535 Class Q requirements if specified for military use. Ensure the ceramic flat package integrity is intact upon receipt. Cross-reference the specific suffix 'B' with the original equipment manufacturer datasheet to confirm pinout and electrical characteristics match the intended design specifications.
Selection Notes
Select this component when military-grade reliability and wide temperature tolerance are required for synchronous binary counting. The LS technology offers a balance between speed and power consumption compared to standard TTL. Consider the ceramic package for superior environmental sealing and thermal stability in extreme conditions. Verify that the independent clock input architecture aligns with the system's timing synchronization requirements.
Part Context
Rochester Electronics provides lifecycle management for legacy and obsolete components, including the SN54LS196 series. These parts are often sourced from original manufacturers or recreated using approved intellectual property to support long-term production needs. The SN54LS196W/B represents a specific variant within the broader family of synchronous counters, tailored for high-reliability applications where standard commercial grade parts are insufficient.
Replacement Considerations
Direct substitutes include other SN54LS196 variants from Texas Instruments or NXP, provided they meet the same military temperature and package specifications. Ensure compatibility with existing board layouts due to the specific 16-pin ceramic flat package dimensions. Verify that any replacement maintains the same logical function and electrical parameters defined in the original datasheet.
