STMicroelectronics 74ACT257MTR Quad 2-Input Multiplexer

The 74ACT257MTR from STMicroelectronics is a high-speed CMOS Quad 2-Input Multiplexer with 3-state outputs that is part of the ACT (Advanced CMOS Technology) family. This integrated circuit is designed for high-performance memory-decoding or data-routing applications that require very short propagation delay times. It is a versatile component that can be used in a wide range of digital circuits and systems.

Each multiplexer has two inputs, one output, and a common data select input. The device also features a common output enable input, which, when high, forces all outputs to the high-impedance state, thus allowing for connection to a common bus without the risk of bus contention. This feature makes the 74ACT257MTR particularly useful in bus-oriented applications.

The device operates from a 4.5V to 5.5V power supply, making it compatible with TTL power levels and logic signals. Its fast switching speeds and low power consumption are achieved through the use of advanced silicon-gate CMOS technology. The 74ACT257MTR can drive up to 24mA at the output, ensuring good signal integrity and strong driving capabilities.

The 74ACT257MTR comes in a surface-mount TSSOP package, which is ideal for space-constrained applications. Its small footprint and low profile make it suitable for use in densely packed PCBs where space is at a premium.

Key features of the 74ACT257MTR include:

• High-speed CMOS technology
• Quad 2-Input multiplexer with 3-state outputs
• Typical operating voltage of 5V
• Low power consumption
• High noise immunity
• Output drive capability of 24mA, suitable for bus-oriented applications
• Guaranteed output skew to maintain signal integrity
• Surface-mount TSSOP packaging for compact designs

The 74ACT257MTR is an essential building block for digital systems requiring high-speed data selection and routing. Its robust design and advanced features ensure reliable performance in a variety of applications, from data processing to communication systems.