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Product Detailed Parameters
- Description：54AS885 8-BIT MAGNITUDE COMPARAT
- Series：*
- Mfr：Texas Instruments
- Package：Bulk
- Type：-
- Number of Bits：-
- Output：-
- Output Function：-
- Voltage - Supply：-
- Current - Output High, Low：-
- Max Propagation Delay @ V, Max CL：-
- Current - Quiescent (Iq)：-
- Operating Temperature：-
- Package / Case：-
- Supplier Device Package：-
- Mounting Type：-
- Grade：-
- Qualification：-
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Overview
The SNJ54AS885JT is an 8-bit magnitude comparator from the Texas Instruments SN54AS series. It operates within a military-grade temperature range of -55°C to 125°C and utilizes a 16-lead ceramic dual in-line package (CDIP). The device features TTL-compatible inputs and provides true output polarity. Key electrical specifications include a maximum operating voltage of 35V, a typical current consumption of 210mA at maximum voltage, and a propagation delay associated with a 35MHz frequency capability. Output drive capabilities are specified as 20mA for low state and -2mA for high state.
Feature Summary
- Provides 8-bit magnitude comparison functionality with cascading capabilities for multi-bit expansion
- Features TTL-compatible input logic levels for direct interfacing with standard digital systems
- Constructed with a hermetically sealed ceramic package designed for harsh environmental conditions
Applications
- Military avionics data processing systems requiring high reliability
- Industrial control units operating in extreme temperature environments
- Automated test equipment performing precise digital value comparisons
Procurement Notes
Verify that the specific part number matches the required military grade specifications and package style. Confirm compliance with relevant export control classifications such as EAR99. Ensure the procurement source provides valid traceability documentation for ceramic packaged components intended for critical applications. Check for any product change notifications affecting material composition or manufacturing location.
Selection Notes
Select this component when an 8-bit comparison function is required alongside strict environmental tolerance limits. The SN54AS series offers faster performance than standard SN54S variants but consumes higher current. Consider the physical dimensions of the 16-lead CDIP package during board layout planning. Evaluate power supply constraints given the 210mA typical current draw at maximum voltage ratings.
Part Context
This device belongs to the Texas Instruments SN54AS family of high-speed Schottky logic devices. The SN54 series designation indicates military-grade qualification, distinguishing it from the commercial SN74AS counterpart. The AS suffix denotes the advanced Schottky technology providing improved speed-power characteristics compared to earlier S-series logic families.
Replacement Considerations
The SN54AS885JT serves as the commercial equivalent to the SNJ54AS885JT, differing primarily in temperature rating and qualification standards. Verify pinout compatibility before substituting with other 8-bit comparators from different manufacturers.
