Overview: TC74AC257,258P/F
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74AC257P, TC74AC257F TC74AC258P, TC74AC258F TC74AC257P/F TC74AC258P/F 2-Channel Multiplexer (3-state)
2-Channel Multiplexer (3-state,inverting) TC74AC257P, TC74AC258P The TC74AC257 and TC74AC258 are advanced high speed CMOS MULTIPLEXERs fabricated with silicon gate and double-layer metal wiring C2MOS technology.
They achieve the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation.
Each is composed of four independent 2-channel multiplexers with common SELECT and OUTPUT ENABLE ( OE ).
The TC74AC257 is a non-inverting multiplexer, while the TC74AC258 is an inverting.
If OE is set low, the outputs are held in a high-impedance state. When SELECT is set low, “A” data inputs are enabled.
Conversely, when SELECT is high, “B” data inputs are enabled.
All inputs are equipped with protection circuits against static discharge or transient excess voltage.
