TC74HC257AF Overview
It achieves the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation. It is posed of four independent 2-channel multiplexers with mon SELECT and OUTPUT ENABLE ( OE ). If OE is set low, the outputs are held in a high-impedance state.
TC74HC257AF Key Features
- High speed: tpd = 10 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: 15 LSTTL loads
- Symmetrical output impedance: |IOH| = IOL =