74ACT257
QUAD 2 CHANNEL MULTIPLEXER (3-STATE)
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HIGH SPEED: tPD =5 ns (TYP.
) at VCC = 5V LOW POWER DISSIPATION: ICC = 8 µA (MAX.
) at TA = 25 oC COMPATIBLE WITH TTL OUTPUTS VIH = 2V (MIN), VIL = 0.
8V (MAX) 50Ω TRANSMISSION LINE DRIVING CAPABILITY SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24 mA (MIN) BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL OPERATING
VOLTAGE RANGE: VCC (OPR) = 4.
5V to 5.
5V PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 257 IMPROVED LATCH-UP IMMUNITY
B M (Plastic Package) (Micro Package) ORDER CODES : 74ACT257B 74ACT257M ENABLE INPUT.
The AC257 is a non inverting multiplexer.
When the ENABLE INPUT is held ”High” outputs of both IC’s become high impedance ...