MC74ACT257 Datasheet
MC74ACT257 Datasheet (onsemi)
onsemi
The MC74AC257/74ACT257 is a quad 2−input multiplexer with 3−state outputs. It selects four bits of data from two sources under control of a Common Data Select input. When the Select input is LOW, the .
crodot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet.
12345678 S I0a I1a Za I0b I1b Zb GND Figure 1. Pinout: 16
*Lead Packages Conductors
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MC74ACT257 Datasheet (Motorola Semiconductor)
Motorola Semiconductor
The MC74AC257/74ACT257 is a quad 2-input multiplexer with 3-state outputs. It selects four bits of data from two sources under control of a Common Data Select input. When the Select input is LOW, the .
S 2 I0a 3 I1a 4 Za 5 I0b 6 I1b 7 Zb 8 GND TRUTH TABLE Output Enable OE H L L L L H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance LOGIC SYMBOL Select Input S X H H L L Data Inputs I0 X X X L H I1 X L H X X Outputs Z Z L H L H S Za Zb Zc Zd OE I0a I1a I0b I1b I.