SN54HC540, SN74HC540
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS

SCLS007B - MARCH 1984 - REVISED MAY 1997

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

features

• High-Current 3-State Outputs Drive Bus Lines Directly or up to 15 LSTTL Loads
• Data Flow-Through Pinout (All Inputs on Opposite Side From Outputs)
• Package Options Include Plastic (DW) and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs

   

description

These octal buffers and line drivers feature the performance of the popular 'HC240 series and offer a pinout with inputs and outputs on opposite sides of the package. This arrangement greatly enhances printed circuit board layout.

The 3-state control gate is a 2-input NOR. If either output-enable (or ) input is high, all eight outputs are in the high-impedance state. The 'HC540 provide inverted data at the outputs.

The SN54HC540 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74HC540 is characterized for operation from -40°C to 85°C.