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Product Detailed Parameters
- Description：54LS682 8-BIT IDENTITY/MAGNITUDE
- 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 SNJ54LS682J is an 8-bit identity/magnitude comparator manufactured by Texas Instruments. It operates within a military-grade temperature range of -55°C to 125°C and utilizes a 20-pin ceramic dual in-line package (CDIP). The device features inverted outputs for A=B and A>B conditions, with pull-up resistors integrated on the B inputs. It supports a supply voltage range typical for LS logic and includes a load capacitance specification of 45 pF.
Feature Summary
- Provides 8-bit magnitude comparison capabilities with identity detection
- Includes internal pull-up resistors on B inputs for simplified interfacing
- Delivers inverted logic outputs for equality and greater-than conditions
- Constructed in hermetically sealed ceramic packaging for harsh environments
Applications
- Military avionics systems requiring high-temperature reliability
- Industrial control logic for binary data validation
- Spacecraft instrumentation for magnitude verification
- Defense communication equipment digital processing
Procurement Notes
Verify the specific suffix J indicates ceramic CDIP packaging and mil-spec qualification. Confirm the active production status through official Texas Instruments channels. Ensure compatibility with existing 54-series logic families regarding voltage levels and thermal management requirements before integration into final designs.
Selection Notes
Select this component when 8-bit comparison is required in extreme temperature environments. The ceramic package offers superior durability compared to plastic variants. Consider the inverted output polarity during circuit design. Verify that the 20-pin footprint matches the target PCB layout constraints and assembly processes.
Part Context
This part belongs to the Texas Instruments 54LS series of logic devices. It serves as a specialized comparator within the broader family of digital logic components. The SNJ prefix denotes military-grade specifications, distinguishing it from commercial grade counterparts like the SN74LS682. It complements other 54-series functions in complex digital systems.
Replacement Considerations
Direct substitutes include other 54LS682 variants with compatible pinouts. Verify package integrity and temperature ratings match application needs. Cross-reference with SNJ54LS682A if updated revisions are available. Ensure functional equivalence in magnitude comparison logic before substitution.
