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Product Detailed Parameters
- Description：SINGLE 8 BIT BUS TRANSCEIVER
- Series：*
- Mfr：Rochester Electronics, LLC
- 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 54LS646JT/B is a Registered Bus Transceiver from the LS Series, manufactured by Rochester Electronics. It features one function with eight bits of data width and true output polarity. The device utilizes CMOS technology and is housed in a ceramic DIP-24 package. It supports three-state outputs and includes direction control for multiplexed transmission of registered or real-time data. The component is characterized for operation over the full military temperature range of -55°C to +125°C.
Feature Summary
- Registered bus transceiver architecture supporting bidirectional data flow
- Direction control input for managing data transmission modes
- Three-state outputs for effective bus isolation
- Military-grade reliability with extended temperature tolerance
Applications
- Multiplexed data transmission systems
- Registered bus interfaces in industrial environments
- Military electronic equipment requiring high reliability
- Space-level applications demanding strict thermal performance
Procurement Notes
Verify that the part number suffix corresponds to the specific ceramic DIP-24 package configuration. Confirm that the manufacturer source aligns with original OEM specifications or qualified recreation standards. Ensure the component meets the required military temperature range specifications for your application environment before finalizing procurement decisions.
Selection Notes
Select this component when a registered bus transceiver with direction control is required for 8-bit data paths. The LS series offers compatibility with standard TTL logic levels while providing the registration capability needed for stable bus operations. Consider the ceramic package for superior environmental resistance compared to plastic alternatives in harsh operating conditions.
Part Context
Rochester Electronics specializes in extending the lifecycle of obsolete and hard-to-find semiconductors. This component is part of their portfolio of recreated devices manufactured using original IP or sourced wafers. The company ensures these parts meet or exceed original manufacturer datasheet specifications, serving critical industries such as aerospace and defense where long-term availability is essential.
Replacement Considerations
Direct replacements include SN54LS646J or other variants within the LS646 family. Verify pinout compatibility and electrical characteristics against the original design requirements. Ensure any substitute maintains the same registered bus transceiver functionality and three-state output capabilities.
