74LVC244A 查看數據表（PDF） - Philips Electronics
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产品描述 (功能)
生产厂家
74LVC244A
Philips Electronics
74LVC244A Datasheet PDF : 10 Pages
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Philips Semiconductors
Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)
Product specification
74LVC244A
74LVCH244A
PIN DESCRIPTION
PIN NUMBER SYMBOL
FUNCTION
1
2, 4, 6, 8
3, 5, 7, 9
10
1OE
1A0 to 1A‘3
2Y0 to 2Y3
GND
Output enable input (active LOW)
Data inputs
Bus outputs
Ground (0V)
17, 15, 13, 11
18, 16, 14, 12
19
2A0 to 2A3
1Y0 to 1Y3
2OE
Bus inputs
Bus outputs
Output enable input (active-LOW)
20
VCC
Positive supply voltage
PIN CONFIGURATION
1OE 1
1A0 2
2Y0 3
1A1 4
2Y1 5
1A2 6
2Y2 7
1A3 8
2Y3 9
GND 10
20 VCC
19 2OE
18 1Y0
17 2A0
16 1Y1
15 2A1
14 1Y2
13 2A2
12 1Y3
11 2A3
SV00212
LOGIC SYMBOL (IEEE/IEC)
1
EN
2
4
6
8
19
EN
11
13
15
17
18
16
14
12
9
7
5
3
SV00209
FUNCTION TABLE
INPUTS
nOE
nAn
L
L
L
H
H
X
H = HIGH voltage level
L = LOW voltage level
X = Don’t care
Z = High impedance OFF-state
LOGIC SYMBOL
OUTPUT
nYn
L
H
Z
2
1A0
1A1 4
6
1A2
8
1A3
1OE 1
18
1Y0
16
1Y1
14
1Y2
12
1Y3
17
2A0
15
2A1
13
2A2
11
2A3
19
2OE
3
2Yo
5
2Y1
7
2Y2
9
2Y3
SV00210
FUNCTIONAL DIAGRAM
2 1A0
4 1A1
6 1A2
8 1A3
1 1OE
17 2A0
15 2A1
13 2A2
11 2A3
19 2OE
1Y0 18
1Y1 16
1Y2 14
1Y3 12
2Yo 3
2Y1 5
2Y2 7
2Y3 9
SV00211
1998 May 20
3
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