JD54LS244SSA

Overview

The JD54LS244SSA is an octal bus driver manufactured by National Semiconductor, belonging to the LS (Low-power Schottky) logic family. It features two independent four-bit buffers with true outputs and three-state capabilities. The device operates on a single 5 V supply and utilizes a 20-lead small outline package (SOIC). Designed for military-grade reliability, it supports an extended operating temperature range from -55 °C to 125 °C. The component provides high-speed data transmission with low power dissipation, making it suitable for memory address drivers and bus-oriented receivers.

Feature Summary

• Octal configuration comprising two independent four-bit non-inverting buffers
• Three-state outputs enable direct connection to system buses without additional interface hardware
• Military-grade construction ensures stable operation across extreme environmental temperatures
• Low-power Schottky technology delivers high switching speeds while minimizing energy consumption

Applications

• Memory address drivers in military computing systems
• Bus-oriented receivers for high-reliability data transmission
• Clock drivers requiring strict timing stability under thermal stress
• Buffering lines in aerospace communication interfaces

Procurement Notes

Verify that the part number suffix matches the specific package variant required for your assembly process. Confirm the manufacturer origin is National Semiconductor or its authorized successor entities to ensure compliance with military specifications. Check for RoHS status if integrating into modern regulated environments, as legacy military parts may not adhere to current environmental directives. Validate lot traceability for critical defense applications.

Selection Notes

Select this component when designing systems requiring octal buffering with true output polarity and three-state isolation. It is appropriate for applications demanding wide temperature tolerance beyond commercial limits. Consider the SOIC package constraints regarding pin pitch and board space compared to DIP alternatives. Ensure voltage levels align with standard 5 V TTL logic families for compatibility.

Part Context

This device is part of the broader 54LS24x series of octal bus drivers. It shares functional similarities with other military-grade logic components but is distinct due to its specific output polarity and package form factor. The JD54LS244SSA serves as a specialized variant within the Low-power Schottky family, offering a balance between speed and power efficiency for ruggedized electronic designs.

Replacement Considerations

Direct substitutes include the DM54LS244SSA or SN54LS244SSA from Texas Instruments, which maintain identical electrical characteristics and pinouts. Verify package dimensions carefully when swapping manufacturers to ensure mechanical fit.