ON Semiconductor MC74AC373DWR2G Octal Transparent Latch

The MC74AC373DWR2G from ON Semiconductor is an integrated circuit that features an octal transparent latch with three-state outputs. Designed for high-speed, low-power operation, it is a part of the advanced high-speed CMOS family. This device is particularly suitable for temporary storage of data and can be used as a buffer or memory address register in a wide array of digital applications.

This latch consists of eight latches with three-state outputs for bus organized system applications. The device comes in a wide-body SOIC-20 package, which is ideal for space-constrained applications while still offering excellent thermal performance. The MC74AC373DWR2G is designed to operate with a supply voltage ranging from 2V to 6V, making it compatible with TTL levels and capable of interfacing with most 5V logic families, which is essential for mixed-voltage environments.

The transparent latch feature means that when the Latch Enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs are latched at the levels that were set up at the D inputs. A buffered Output Enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the latter state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without interface or pullup components.

ON Semiconductor's MC74AC373DWR2G offers a propagation delay time of typically 4.5 ns, ensuring swift response times for critical applications. It also features low quiescent power consumption, which makes it suitable for battery-operated portable devices. The device's inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.

The MC74AC373DWR2G is a reliable and versatile component for designers looking to implement latching functions in their digital systems, with the quality assurance of ON Semiconductor's manufacturing expertise.