onsemi (Ansemi)

TSSOP-20

Tube

75

The MM74HC540 and MM74HC541 3-state buffers are built on an advanced silicon-gate CMOS process. They feature high drive current outputs, enabling high-speed operation even when driving large bus capacitances. These circuits also achieve high speed compared to low-power Schottky devices, while retaining the advantages of CMOS circuits, namely high noise immunity and low power consumption. Both devices have a fanout equivalent to 15 LS-TTL inputs. The MM74HC540 is an inverting buffer and the MM74HC541 is a non-inverting buffer. This 3-state control gate operates as a two-input NOR, so when either G1# or G2# is high, all eight outputs are in a high-impedance state. To enhance PC board layout, the MM74HC540 and MM74HC541 provide pin-outs with input and output on opposite sides of the encapsulation. Protect all inputs from electrostatic discharge damage by diode-connecting VCC and ground.