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Operating Voltage Range of 4.5 V to 5.5 V

State-of-the-Art BiCMOS Design

Significantly Reduces ICCZ

3-State Outputs Drive Bus Lines or Buffer

Memory Address Registers

P-N-P Inputs Reduce DC Loading

Data Flow-Through Pinout (All Inputs on

Opposite Side From Outputs)

ESD Protection Exceeds JESD 22

– 2000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

– 1000-V Charged-Device Model (C101)

description/ordering information

The SN54BCT540 and SN74BCT540A octal buffers and line drivers are ideal for driving bus lines or buffer

memory-address registers. The devices feature inputs and outputs on opposite sides of the package to facilitate

printed circuit board layout.

The 3-state control gate is a 2-input AND gate with active-low inputs so that if either output-enable (OE1 or OE2)

input is high, all corresponding outputs are in the high-impedance state.

To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.