The TC74VHC157FK(EL) 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 TC74VHC157FK(EL) is supplied in a VSSOP16 package and is suitable for surface mount applications. The operating temperature range is -40°C to 85°C. The (EL) suffix typically indicates a specific packing or environmental compliance requirement.

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.