ON Semiconductor MC74VHCT373A Octal Transparent Latch

The MC74VHCT373A from ON Semiconductor is an advanced high-speed CMOS octal latch with 3-state outputs. This integrated circuit is designed for use in applications requiring the high-speed performance of CMOS technology coupled with the power-saving features that are critical in high-performance portable and battery-powered devices. The MC74VHCT373A is part of ON Semiconductor's high-speed CMOS logic family and is fabricated with silicon gate CMOS technology.

Featuring eight latches with 3-state outputs for bus-organized systems, the MC74VHCT373A is capable of storing up to eight bits of data. The transparent latch mechanism ensures that while the latch-enable (LE) input is high, the Q outputs will follow the data (D) inputs. When LE is taken low, the data that was present at the D inputs at the time the transition occurred is latched and held at the Q outputs until LE is returned high again.

The MC74VHCT373A also provides an output enable (OE) input that, when high, places the eight outputs in a high impedance state. This is particularly useful for interfacing with bus lines in a system, where multiple devices may need to send signals over the same line without interference. When OE is low, the outputs are active and reflect the data that has been latched.

This device is capable of operating with a wide range of supply voltages, from 4.5V to 5.5V, and includes input protection circuits that ensure that 0V to 7V can be applied to the input and output (bus) pins without regard to the supply voltage. This input protection helps to prevent device damage due to static discharge or other potential voltage spikes.

The MC74VHCT373A is available in multiple package options, including the 20-lead plastic SOIC and the 20-lead TSSOP. Its fast propagation delay times and low quiescent current make it an excellent choice for portable electronics, as well as for more general-purpose latching applications where high-speed operation and low power consumption are required.

With its robust design and compatibility with TTL (Transistor-Transistor Logic) levels, the MC74VHCT373A from ON Semiconductor is a reliable and efficient solution for a wide range of digital logic applications.