SNJ54F240J

Overview

The SNJ54F240J is a military-grade octal buffer and line driver featuring three-state outputs, manufactured by Texas Instruments. It operates within a supply voltage range of 4.5V to 5.5V and supports an operating temperature range from -55°C to 125°C. The device consists of two independent 4-bit buffers with separate active-low output enable inputs. It utilizes a 20-pin ceramic dual in-line package (CDIP). Electrical characteristics include a maximum low-level output current of 64mA and high-level output current of -15mA at VCC=4.5V.

Feature Summary

• Provides octal buffering and line driving capabilities with three-state outputs for bus-oriented applications.
• Features symmetrical active-low output-enable inputs to control data flow between A inputs and Y outputs.
• Designed specifically to improve performance and density in memory address drivers and clock drivers.

Applications

• Driving bus lines
• Buffering memory address registers
• Clock drivers

Procurement Notes

Verify the SNJ54F240J part number against official Texas Instruments documentation to confirm it is the military-grade variant characterized for -55°C to 125°C operation. Ensure the CDIP package matches system requirements. Cross-reference datasheet SDFS061A for accurate electrical specifications and absolute maximum ratings before integration.

Selection Notes

Select the SNJ54F240J when military-grade reliability and wide temperature tolerance are required for octal bus driving. Compare with SN74F240 variants if commercial temperature ranges suffice. Consider the F/FAST logic family speed characteristics and three-state functionality for bidirectional or unidirectional bus architectures requiring high-density signal routing.

Part Context

The SNJ54F240J belongs to the SN54F240 series of octal buffers/drivers with three-state outputs. It is part of the F/FAST logic family, designed for high-speed digital applications. The 'SNJ' prefix indicates a military-grade ceramic dual in-line package version, distinct from the commercial SN74F240 counterparts available in plastic packages.

Replacement Considerations

Public confirmed substitute part numbers include SNJ54F240FK and SNJ54F240W, which offer the same functionality in LCCC and CFP packages respectively. Other qualified versions include catalog SN74F240 for commercial applications.