The TC74VHC157F is a high-speed CMOS quad 2-to-1 line data selector/multiplexer fabricated with silicon gate CMOS technology by Toshiba Semiconductor and Storage. It achieves high-speed operation similar to equivalent Bipolar Schottky TTL devices, while maintaining the CMOS low power dissipation. It selects four bits of data from two sources using a common select input (S). When the enable input (G) is HIGH, all outputs are forced LOW.

Applications

• Data selection
• Parallel-to-serial conversion
• Logic function generation

Features

• High-speed operation: tpd = 4.7 ns (typ.) at VCC = 5 V
• Low power dissipation: ICC = 4 μA (max) at Ta = 25°C
• High noise immunity: VNIH = VNIL = 28 % VCC (min)
• Output drive capability: 10 LSTTL loads
• Symmetrical output impedance: |IOH| = IOL = 8 mA (min)
• Balanced propagation delays: tPLH ≈ tPHL
• Wide operating voltage range: VCC = 2 V to 5.5 V
• Pin and function compatible with 74HC157

Benefits

• Increased system performance due to high-speed operation.
• Reduced power consumption leading to longer battery life in portable devices.
• Improved noise immunity ensures reliable operation in noisy environments.
• Ability to drive a large number of loads simplifies system design.
• Symmetrical output impedance minimizes signal distortion.
• Balanced propagation delays ensure accurate timing.
• Wide operating voltage provides flexibility in power supply design.

Additional Details

The TC74VHC157F is supplied in a SOP16 package and is suitable for surface mount applications. The operating temperature range is -40°C to 85°C.

The inputs are equipped with protection circuits against static discharge or transient excess voltage. This ensures the device is robust and reliable in demanding applications.