STMicroelectronics M74HC244M1R Octal Buffer/Line Driver

The M74HC244M1R is a high-speed CMOS octal bus buffer and line driver designed to interface with standard bus architectures and ensure signal integrity with its robust drive capabilities. Manufactured by the renowned semiconductor company STMicroelectronics, this integrated circuit is part of the HC family, which signifies the use of silicon-gate CMOS technology to achieve operating speeds similar to LSTTL, with the low power consumption of standard CMOS integrated circuits.

This device features eight non-inverting buffer/line drivers with 3-state outputs, which can be employed as either a buffer or a line driver for bus-oriented systems. The 3-state control gate is a common feature that allows for the disconnection of the outputs from the bus, effectively providing a high-impedance state. This is particularly useful in creating bidirectional bus systems where data flow needs to be controlled dynamically.

The M74HC244M1R is equipped with two active-low output enable inputs (OE1, OE2), which must be held low to enable the device's outputs. When either of these inputs is held high, the respective outputs (Y) assume a high-impedance state, thus isolating the bus. Each set of four buffers has its own output enable input, allowing for greater flexibility in control and bus management.

This IC operates over a broad voltage range from 2V to 6V and offers symmetrical output impedance, high noise immunity, and low power consumption. These characteristics make the M74HC244M1R suitable for a variety of applications, including driving bus lines, buffering memory address registers, and supporting the distribution of high-current drive signals across multiple destinations.

The M74HC244M1R is available in SO-20 (Small Outline Package) and is characterized for operation from -55°C to 125°C, ensuring reliable performance across a wide range of environmental conditions. Its compatibility with JEDEC standard no. 7A requirements ensures that it can be easily integrated into existing and new designs with minimal effort.

Overall, the M74HC244M1R from STMicroelectronics is a versatile and reliable choice for designers looking to implement high-performance bus systems in their digital applications.