M38510/32803BRA

Overview

The M38510/32803BRA is an octal bus transceiver manufactured by Texas Instruments under the SN54LS245 designation. It features 20-pin ceramic dual in-line package (CDIP) construction with a metal-sealed cofired body. The device operates within a temperature range of -55 °C to 125 °C and utilizes Schottky transistor logic. Key electrical parameters include a typical propagation delay of 8 ns, a maximum low-level output current of 12 mA, and a high-level output current of -12 mA. It supports bidirectional data transmission between two buses controlled by a direction input.

Feature Summary

• Provides three-state outputs capable of driving bus lines directly while allowing isolation via an active-low output enable pin.
• Incorporates PNP inputs designed to reduce DC loading on connected bus lines.
• Features built-in hysteresis at the bus inputs to improve noise margins during signal transmission.

Applications

• Building automation systems
• Electronic point of sale terminals
• Factory automation and control networks

Procurement Notes

Verify that the component matches the specific MIL-PRF-38535 qualification requirements for your application. Confirm the CDIP package integrity and lead finish specifications against the datasheet. Ensure the operating environment stays within the specified -55 °C to 125 °C range. Check for any specific screening levels required for military or aerospace use cases.

Selection Notes

Select this component when bidirectional octal data transfer is required in harsh environments. The LS logic family offers standard drive capabilities suitable for moderate speed applications. Consider the CDIP package for through-hole mounting and robust physical protection. Verify compatibility with existing 5V supply rails and logic voltage levels.

Part Context

This part belongs to the SN54LS245 series of octal bus transceivers. It is a military-grade version compliant with MIL-PRF-38535 standards. The device functions as a standard '245 logic function with common pinout and direction select capabilities. It is distinct from commercial variants like the SN74LS245 due to its extended temperature range and packaging.

Replacement Considerations

JM38510/32803BSA is a confirmed substitute offering identical functionality in a Ceramic Flatpack (CFP) package. Both parts share the same logical operations and electrical characteristics. Verify pin compatibility and thermal management requirements when switching between CDIP and CFP packages.