MC74AC350N 查看數據表（PDF） - Motorola => Freescale
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MC74AC350N Datasheet PDF : 9 Pages
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MC74AC350
MC74ACT350
4ĆBit Shifter
With 3ĆState Outputs
The MC74AC350/74ACT350 is a specialized multiplexer that accepts a 4-bit
word and shifts it 0, 1, 2 or 3 places, as determined by two Select (S0, S1) inputs.
For expansion to longer words, three linking inputs are provided for lower-order
bits; thus two packages can shift an 8-bit word, four packages a 16-bit word, etc.
Shifting by more than three places is accomplished by paralleling the 3-state outputs
of different packages and using the Output Enable (OE) inputs as a third Select
level. With appropriate interconnections, the ′AC/ACT350 can perform zero-backfill,
sign-extend or end-around (barrel) shift functions.
• Linking Inputs for Word Expansion
• 3-State Outputs for Extending Shift Range
VCC O0 O1 OE O2 O3 S0 S1
16 15 14 13 12 11 10 9
4-BIT SHIFTER
WITH 3-STATE
OUTPUTS
N SUFFIX
CASE 648-08
PLASTIC
12345678
I–3 I–2 I–1 I0 I1 I2 I3 GND
TRUTH TABLE
Inputs
Outputs
OE
S1
S0
O0
O1
O2
O3
H
X
X
Z
Z
Z
Z
L
L
L
I0
I1
I2
I3
L
L
H
I–1
I0
I1
I2
L
H
L
I–2
I–1
I0
I1
L
H
H
I–3
I–2
I–1
I0
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
D SUFFIX
CASE 751B-05
PLASTIC
LOGIC SYMBOL
12 34 567
10
S0 I–3 I–2 I–1 I0 I1 I2 I3
9
S1
13
OE
O0 O1 O2 O3
15 14 12 11
FACT DATA
5-1
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