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74HC244 Datasheet(PDF) 3 Page - NXP Semiconductors

Part No. 74HC244
Description  Octal buffer/line driver; 3-state
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HC244 Datasheet(HTML) 3 Page - NXP Semiconductors

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74HC_HCT244
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 4 — 24 September 2012
3 of 18
NXP Semiconductors
74HC244; 74HCT244
Octal buffer/line driver; 3-state
5.
Pinning information
5.1 Pinning
5.2 Pin description
(1) This is not a supply pin. The substrate is attached to this
pad using conductive die attach material. There is no
electrical or mechanical requirement to solder this pad.
However, if it is soldered, the solder land should remain
floating or be connected to GND.
Fig 4.
Pin configuration DIP20, SO20, (T)SSOP20
Fig 5.
Pin configuration DHVQFN20
74HC244
74HCT244
1OE
VCC
1A0
2OE
2Y0
1Y0
1A1
2A0
2Y1
1Y1
1A2
2A1
2Y2
1Y2
1A3
2A2
2Y3
1Y3
GND
2A3
001aae011
1
2
3
4
5
6
7
8
9
10
12
11
14
13
16
15
18
17
20
19
001aae012
74HC244
74HCT244
Transparent top view
1Y3
1A3
2Y3
2A2
2Y2
1Y2
1A2
2A1
2Y1
1Y1
1A1
2A0
2Y0
1Y0
1A0
2OE
9
12
8
13
7
14
6
15
5
16
4
17
3
18
2
19
terminal 1
index area
GND(1)
Table 2.
Pin description
Symbol
Pin
Description
1OE, 2OE
1, 19
output enable input (active LOW)
1A0, 1A1, 1A2, 1A3
2, 4, 6, 8
data input
2Y0, 2Y1, 2Y2, 2Y3
3, 5, 7, 9
bus output
GND
10
ground (0 V)
2A0, 2A1, 2A2, 2A3
17, 15, 13, 11
data input
1Y0, 1Y1, 1Y2, 1Y3
18, 16, 14, 12
bus output
VCC
20
supply voltage


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