The MC74HCT157AD is a quad 2-input multiplexer manufactured by Freescale Semiconductor - NXP. This device belongs to the HCT family of high-speed CMOS logic, featuring TTL-compatible input thresholds, low power consumption, and high noise immunity. It selects one of two 4-bit data sources based on a common select input.

Applications

• Data routing
• Parallel-to-serial conversion
• Logic function generation
• Digital multiplexing
• Memory address selection

Features

• TTL Compatible Input Thresholds
• High Speed: tPD = 17 ns (typ) at VCC = 5V
• Low Power Dissipation: ICC = 4 μA (max) at TA = 25°C
• High Noise Immunity: VNIL = 0.8 V; VNIH = 2.0 V
• Output Drive Capability: 10 LSTTL Loads
• Symmetrical Output Impedance: |IOH| = IOL = 4 mA
• Operating Voltage Range: 4.5 V to 5.5 V

Benefits

• TTL Compatibility: Easy interfacing with TTL logic circuits.
• Low Power Consumption: Suitable for power-sensitive applications.
• High Speed: Facilitates fast data selection and routing.
• Quad Multiplexer: Provides four independent 2-to-1 multiplexers in a single package.
• Space Saving: Consolidates multiplexing functions into a single IC.

Additional Details

The MC74HCT157AD consists of four 2-input multiplexers with a common select input. When the select input is low, data from the A inputs is passed to the outputs. When the select input is high, data from the B inputs is passed to the outputs. The device also has an output enable (OE) input, which, when high, forces all outputs to the low state. It is commonly available in a 16-pin SOIC package. Operating Temperature Range: -40°C to +85°C.