Datasheet

2
Pinout
CD54HC240, CD54HCT240, CD54HCT241,
CD54HC244, CD54HCT244
(CERDIP)
CD74HC240, CD74HC241, CD74HCT241,
CD74HC244, CD74HCT244
(PDIP, SOIC)
CD74HCT240,
(PDIP, SOIC, TSSOP)
TOP VIEW
Functional Diagram
11
12
13
14
15
16
17
18
20
19
10
9
8
7
6
5
4
3
2
1
1OE
1A0
2Y3
1A1
2Y2
1A2
1A3
2Y1
2Y0
GND
V
CC
1Y0
2A3
1Y1
2OE (241)
2A2
1Y2
2A1
1Y3
2A0
241
244 240
V
CC
1Y0
2A3
1Y1
2OE (240, 244
)
2A2
1Y2
2A1
1Y3
2A0
1OE
1A0
2Y3
1A1
2Y2
1A2
1A3
2Y1
2Y0
GND
241
244240
18
16
14
12
7
3
5
9
2
1Y0
1Y1
1Y2
1Y3
2Y0
2Y1
2Y2
2Y3
2OE
1OE
1
19
6
2OE
1OE
1Y0
1Y1
1Y2
1Y3
2Y0
2Y1
2Y2
2Y3
240
241
17
4
8
11
13
15
1A0
1A1
1A2
1A3
2A0
2A1
2A2
2A3
240
AND
244
241
AND
244
V
CC
= 20
GND = 10
CD54/74HC240, CD54/74HCT240, CD74HC241, CD54/74HCT241, CD54/74HC244, CD54/74HCT244