JM54AC244SSA-RH

Overview

The JM54AC244SSA-RH is an octal buffer and line driver manufactured by National Semiconductor. It features two functional blocks, each handling four bits with true output polarity. The device utilizes CMOS technology and provides three-state outputs controlled by a low-enable signal. It is housed in a 20-lead ceramic flatpack (CFP) package, specifically the CQCC20 form factor. The component operates within a temperature range of -55°C to 125°C and supports a maximum output current of 12 mA.

Feature Summary

• Octal buffering architecture with dual four-bit functional units
• Three-state output capability for bus-oriented applications
• Ceramic metal-sealed cofired package construction
• Low-enable control logic for output activation

Applications

• Bus-oriented memory and register drivers
• Clock drivers and bus transceivers
• High-performance register applications requiring isolation

Procurement Notes

Verify the specific suffix 'RH' against the manufacturer's datasheet to confirm the exact tape-and-reel or tray packaging configuration. Ensure the ceramic flatpack variant matches the required footprint for your PCB layout. Cross-reference the MIL-spec designation JM38510R75705SSA if military-grade qualification is required for your procurement process.

Selection Notes

Select this component when high-speed octal buffering with three-state outputs is required in a ruggedized environment. The ceramic package offers superior thermal stability compared to plastic variants. Consider the AC series speed-power trade-offs relative to ABT or ALS families if lower power consumption or higher speed is needed for the specific application constraints.

Part Context

This part belongs to the 54AC244 family of octal buffers. It is the military-grade equivalent of the commercial 54AC244, distinguished by its extended temperature range and ceramic packaging. The JM prefix indicates compliance with MIL-STD-883 standards, ensuring reliability for aerospace and defense applications where standard commercial parts are insufficient.

Replacement Considerations

Direct substitutes include the 54AC244LM from Fairchild in a similar LCC-20 package. For pin-compatible replacements, verify the 54AC244N or 54AC244D if plastic packages are acceptable. Ensure any replacement maintains the three-state output and low-enable functionality specified in the original design.