參數(shù)資料
型號(hào): 74HCT244AT
英文描述: Dual 4-Bit Non-Inverting Buffer/Driver
中文描述: 雙4位非反向緩沖器/驅(qū)動(dòng)器
文件頁數(shù): 3/13頁
文件大小: 80K
代理商: 74HCT244AT
1998 Sep 30
3
Philips Semiconductors
Product specification
Quad 2-input multiplexer; 3-state
74HC/HCT257
ORDERING INFORMATION
PIN DESCRIPTION
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
74HC257N;
74HCT257N
74HC257D;
74HCT257D
74HC257DB;
74HCT257DB
74HC257PW;
74HCT257PW
DIP16
plastic dual in-line package; 16 leads (300 mil); long body
SOT38-1
SO16
plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
SSOP16
plastic shrink small outline package; 16 leads; body width 5.3 mm
SOT338-1
TSSOP16
plastic thin shrink small outline package; 16 leads; body width 4.4 mm
SOT403-1
PIN NO.
SYMBOL
NAME AND FUNCTION
1
2, 5, 11, 14
3, 6, 10, 13
4, 7, 9, 12
8
15
16
S
1I
0
to 4I
0
1I
1
to 4I
1
1Y to 4Y
GND
OE
V
CC
common data select input
data inputs from source 0
data inputs from source 1
3-state multiplexer outputs
ground (0 V)
3-state output enable input (active LOW)
positive supply voltage
Fig.1 Pin configuration.
fpage
GND
VCC
MLB311
S
OE
1Y
2Y
4Y
3Y
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
257
1I0
1I1
2I0
2I1
4I0
4I1
3I0
3I1
Fig.2 Logic symbol.
fpage
MGA835
S
OE
1Y
2Y
3Y
4Y
2
3
5
6
11
10
14
13
15
1
4
7
9
12
1I0
1I1
2I0
2I1
3I0
3I1
4I0
4I1
Fig.3 IEC logic symbol.
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