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Product Detailed Parameters
- Description：IC TRPL 3-INP
- Series：*
- Mfr：Texas Instruments
- Package：Bulk
- Logic Type：-
- Number of Circuits：-
- Number of Inputs：-
- Features：-
- Voltage - Supply：-
- Current - Quiescent (Max)：-
- Current - Output High, Low：-
- Input Logic Level - Low：-
- Input Logic Level - High：-
- Max Propagation Delay @ V, Max CL：-
- Operating Temperature：-
- Mounting Type：-
- Supplier Device Package：-
- Package / Case：-
- Grade：-
- Qualification：-
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Overview
The SN54ALS27AJ is a military-grade Triple 3-Input Positive-NOR Gate from Texas Instruments' ALS logic family. It operates within a supply voltage range of 4.5 V to 5.5 V and features a ceramic DIP package with glass-sealed construction. The device supports an extended operating temperature range from -55 °C to +125 °C. Key electrical parameters include a maximum low-level output current of 12 mA, a high-level output current of -8 mA, and a typical propagation delay of 10 ns at 50 pF load.
Feature Summary
- Provides three independent 3-input NOR logic functions in a single package
- Utilizes Advanced Low-Power Schottky (ALS) technology for high-speed operation
- Features robust push-pull outputs capable of driving standard TTL loads
- Constructed with hermetic ceramic packaging for harsh environment reliability
Applications
- Military aerospace control systems requiring radiation and vibration resistance
- High-reliability industrial logic processing units
- Spacecraft command and data handling subsystems
- Harsh environment signal conditioning circuits
Procurement Notes
Verify the specific suffix 'AJ' against the manufacturer's official datasheet to confirm the exact package variant and environmental rating. Ensure procurement channels are authorized to guarantee component authenticity and traceability for military specifications. Confirm availability as this series may be subject to limited production runs or obsolescence notices.
Selection Notes
Select the SN54ALS27AJ when military-grade reliability and wide temperature tolerance are required. Compare propagation delays and power consumption against LS or S variants if cost or lower speed is acceptable. Verify that the ceramic package dimensions fit the target PCB footprint and that the 5V supply rail matches system requirements.
Part Context
This component belongs to the SN54xx series, designed for military applications with extended temperature ranges. It complements other ALS logic gates like the SN54ALS00 or SN54ALS20. Unlike commercial SN74 counterparts, it offers superior thermal stability and hermetic sealing suitable for defense and space environments.
Replacement Considerations
Direct pin-compatible replacements include the SN54LS27J for lower speed requirements or the SN54S27 for higher speed but higher power consumption. Cross-family substitution requires verifying voltage levels and drive strength compatibility.
