74VHCT257A Description
t(s The 74VHCT257A is an advanced high-speed c CMOS quad 2 channel multiplexer (3-state) du fabricated with sub-micron silicon gate and ro double-layer metal wiring C2MOS technology. P It is posed of four independent 2 channel te multiplexers with mon select and enable input (OE). The VHCT257A is a non-inverting le multiplexer.
74VHCT257A Key Features
- High speed: tPD = 4.8 ns (typ.) at VCC = 5 V
- Low power dissipation
- patible with TTL outputs t(s VIH = 2 V (min.), VIL = 0.8 V (max.) c
- Power-down protection on inputs and outputs du
- Symmetrical output impedance ro |IOH| = IOL = 8 mA (min.) P
- Balanced propagation delays: tPLH ≅ tPHL te
- Operating voltage range: VCC(opr) = 4.5 to 5.5 V le
- Pin and function patible with 74 series 257 so
- Improved latch-up immunity b
- Low noise: VOLP = 0.8 V (max.) )