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74FST3126 4-Bit Bus Switch
The ON Semiconductor 74FST3126 is a quad, high performance switch. The device is CMOS TTL compatible when operating between 4 and 5.5 Volts. The device exhibits extremely low RON and adds nearly zero propagation delay. The device adds no noise or ground bounce to the system. The device consists of four independent 1–bit switches with separate Output/Enable (OE) pins. Port A is connected to Port B when OE is high. If OE is low, the switch is high Z.
http://onsemi.com MARKING DIAGRAMS
14 1 SO–14 D SUFFIX CASE 751A 14 FST3126 AWLYWW 1 14 14 1 FST 3126 ALYW
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RON t 4 W Typical Less Than 0.