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Product Detailed Parameters
- Description：SN54ALS138A 3-LINE TO 8-LINE DEC
- Series：*
- Mfr：Texas Instruments
- Package：Bulk
- Type：-
- Circuit：-
- Independent Circuits：-
- Current - Output High, Low：-
- Voltage Supply Source：-
- Voltage - Supply：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The Texas Instruments 5962-86866012A is a military-grade SN54ALS138A decoder/demultiplexer. It features a single 3-to-8 line decoding function with inverted outputs. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -55°C to +125°C. It utilizes a 20-pin LCCC package for robust environmental performance.
Feature Summary
- Military-grade reliability for harsh environments
- High-speed ALS logic technology
- Three address inputs for eight decoded outputs
- Inverted output configuration
Applications
- Military communication systems
- Avionics data routing
- Industrial control decoding
- Spacecraft subsystem addressing
Procurement Notes
Verify the specific suffix 'A' indicates the standard military qualification level. Confirm the package type matches the required 20-pin LCCC footprint. Ensure the design accounts for TTL-compatible input levels. Check for any specific handling requirements due to the ceramic or specialized plastic packaging used in this series.
Selection Notes
Select this component when high-speed decoding is required in extreme temperature conditions. The ALS family offers a balance between speed and power consumption suitable for battery-constrained military applications. Ensure the system voltage aligns with standard 5V TTL logic levels. Consider the pin count and package availability compared to commercial alternatives.
Part Context
This part belongs to the SN54 series, which denotes military qualification standards distinct from the commercial SN74 series. The 5962 prefix identifies it as a direct chip carrier product often sourced through authorized defense distributors. It is part of the broader ALS (Advanced Low-power Schottky) logic family known for improved performance over standard LS logic.
Replacement Considerations
Direct substitutes include other SN54ALS138 variants with matching military ratings. Verify pin compatibility before swapping with SN54LS138 equivalents, noting potential speed differences. Commercial SN74ALS138 parts are not suitable for the specified temperature range.
