SN54HCT540, SN74HCT540
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS

SCLS008B - 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

• Inputs Are TTL-Voltage Compatible
• High-Current 3-State Outputs Interface Directly With System Bus or Can Drive up to 15 LSTTL Loads
• Data Flow-Through Pinout (All Inputs on Opposite Side From Outputs)
• Package Options Include Plastic Small-Outline (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 are designed to have the performance of the 'HCT240 and a pinout with inputs and outputs on opposite sides of the package. This arrangement greatly facilitates 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 'HCT540 provide inverted data at the outputs.

The SN54HCT540 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74HCT540 is characterized for operation from -40°C to 85°C.