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Product Detailed Parameters
- Description：BUS TRANSCEIVER, LS SERIES TTL
- Series：*
- Mfr：Texas Instruments
- Package：Bulk
- Logic Type：-
- Number of Elements：-
- Number of Bits per Element：-
- Input Type：-
- Output Type：-
- Current - Output High, Low：-
- Voltage - Supply：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The SNJ54LS242FK is a single bus transceiver from Texas Instruments' LS TTL series. It features four bits per function with bidirectional data flow and independent control. The device utilizes a 20-pin ceramic leadless chip carrier (LLCC) package, specifically QCCN LCC20. It operates within a temperature range of -55°C to 125°C and requires a 5V supply. Key electrical characteristics include a maximum output current of 12mA and a propagation delay of 15ns at nominal supply.
Feature Summary
- Supports bidirectional data transmission between two ports
- Features independent control for each direction
- Provides three-state outputs for bus driving
- Designed for high-temperature military environments
Applications
- Military-grade data bus systems
- High-reliability communication interfaces
- Temperature-extreme industrial control networks
Procurement Notes
Verify the specific suffix FK corresponds to the ceramic LLCC package configuration. Confirm RoHS non-compliance status due to military qualification requirements. Ensure the supplier provides traceability documentation consistent with SNJ prefix specifications for defense or aerospace procurement compliance.
Selection Notes
Select this component when independent directional control is required for 4-bit wide buses in harsh environments. Compare against SNJ54ALS242AFH for faster switching speeds or SNJ54LS245J for octal width requirements. Verify package compatibility with existing ceramic footprints before integration into the design.
Part Context
This part belongs to the Texas Instruments 54LS family of logic circuits, designed for military specifications. The SNJ prefix indicates a specific manufacturing line for high-reliability applications. It serves as a buffer and driver interface within complex digital systems requiring robust signal integrity over wide temperature ranges.
Replacement Considerations
SNJ54ALS242AFH offers similar functionality with ALS technology for improved speed. SNJ54LS245J provides an octal configuration instead of quad. Verify pinout compatibility and package dimensions before substituting these alternatives.
