JM38510/34803BRA

Overview

The JM38510/34803BRA is a military-grade octal bus transceiver manufactured by Texas Instruments, conforming to the SN54F245 specification. It features bidirectional data transmission between two 8-bit buses controlled by a direction input and an output enable signal. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a full military temperature range from -55 °C to 125 °C. It utilizes a 20-pin Ceramic Dual In-Line Package (CDIP) with 3-state outputs capable of driving bus lines directly.

Feature Summary

• Bidirectional octal bus transceiver architecture for asynchronous communication
• Direction control logic manages data flow between A and B buses
• Output enable input isolates buses when deactivated
• 3-state outputs allow direct connection to bus lines

Applications

• Military and defense electronic systems requiring high reliability
• Asynchronous data bus communication interfaces
• High-speed digital signal routing in harsh environments

Procurement Notes

Verify that the component matches the specific military qualification standards required for your application. Confirm the package type is the 20-pin CDIP variant. Ensure the operating environment falls within the specified temperature and voltage limits. Check for any specific lot traceability requirements mandated by your procurement regulations.

Selection Notes

Select this component when designing systems that require robust, bidirectional data transfer across multiple lines simultaneously. It is suitable for applications demanding operation under extreme temperature conditions typical of aerospace or defense sectors. Consider the 3-state output capability if bus sharing is necessary to prevent signal contention.

Part Context

This part belongs to the SN54 series of logic integrated circuits, which are characterized for full military temperature ranges. It serves as a specialized version of the commercial SN74F245, offering enhanced durability and performance specifications suitable for rigorous operational environments where standard commercial components would fail.

Replacement Considerations

JM38510/34803B2A

FAQ

What controls the direction of data transmission?

The direction of data flow between the A and B buses is determined by the logic level at the DIR (direction-control) input pin.

How does the device isolate the buses?

When the OE (output enable) input is set to a high logic level, the device disables its outputs, effectively isolating the A and B buses from each other.