产品介绍

M74HC257 Quad 2-Channel Multiplexer (3-State)

The M74HC257 is an high speed CMOS QUAD 2 CHANNEL MULTIPLEXER (3-STATE) fabricated with silicon gate C2MOS technology.

This IC is composed of an independent 2-channel multiplexer with common SELECT and ENABLE (OE) input.

The M74HC257 is a non-inverting multiplexer.

When the ENABLE input is held "High", outputs of the IC become in a High-Impedance state. If SELECT input is held low, "A" data is selected, when SELECT is high , "B" data is chosen.

All inputs are equipped with protection circuits against static discharge and transient excess voltage

技术特性

• High speed:
  • tPD=11ns (TYP.) at VCC= 6V
• Low power dissipation:
  • ICC= 4 µA(MAX.) at TA=25 °C
• High noise immunity:
  • VNIH= VNIL= 28 % VCC (MIN.)
• Symmetrical output impedance:
  • |IOH| = IOL= 6mA (MIN)
• Balanced propagation delays:
  • tPLH tPHL
• Wide operating voltage range:
  • VCC(OPR) = 2V to 6V
• Pin and function compatible with 74 series 257

M74HC257 订购信息

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