MM74HCT540WM

The MM74HCT540WM from ON Semiconductor is a high-speed octal 3-state inverting buffer built using advanced silicon-gate CMOS technology. It offers high drive current outputs suitable for driving large bus capacitances, achieving speeds comparable to low-power Schottky devices while maintaining CMOS low power consumption.

This buffer is designed for interfacing between TTL and NMOS components and standard CMOS devices. It is also a plug-in replacement for LS-TTL devices, enabling power consumption reduction in existing designs. The device features TTL input compatibility and a fanout of 15 LS-TTL equivalent inputs. The 3-state control gate operates as a two-input NOR, ensuring all outputs are in a high-impedance state when either control input is HIGH.

Packaged in a 20-SOIC format, the MM74HCT540WM is suitable for surface mount applications. Its operating temperature range is -40°C to 85°C (TA), and it requires a supply voltage between 4.5V and 5.5V. The buffer has an output current capability of 7.2mA and a typical propagation delay of 12 ns.

All inputs are protected from static discharge damage by diodes to VCC and ground. The pinout is designed to enhance PC board layout with inputs and outputs on opposite sides of the package.