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74HC244N,652

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
1. General description
The 74HC244; 74HCT244 is an 8-bit buffer/line driver with 3-state outputs. The device
can be used as two 4-bit buffers or one 8-bit buffer. The device features two output
enables (1OE
and 2OE), each controlling four of the 3-state outputs. A HIGH on nOE
causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes
that enable the use of current limiting resistors to interface inputs to voltages in excess of
V
CC
.
2. Features and benefits
Input levels:
For 74HC244: CMOS level
For 74HCT244: TTL level
Octal bus interface
Non-inverting 3-state outputs
Complies with JEDEC standard no. 7 A
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from 40 Cto +85C and 40 Cto +125C
3. Ordering information
74HC244; 74HCT244
Octal buffer/line driver; 3-state
Rev. 4 — 24 September 2012 Product data sheet
Table 1. Ordering information
Type number Package
Temperature range Name Description Version
74HC244N 40 Cto+125C DIP20 plastic dual in-line package; 20 leads (300 mil) SOT146-1
74HCT244N
74HC244D 40 Cto+125C SO20 plastic small outline package; 20 leads;
body width 7.5 mm
SOT163-1
74HCT244D
74HC244DB 40 Cto+125C SSOP20 plastic shrink small outline package; 20 leads;
body width 5.3 mm
SOT339-1
74HCT244DB
74HC244PW 40 Cto+125C TSSOP20 plastic thin shrink small outline package; 20 leads;
body width 4.4 mm
SOT360-1
74HCT244PW
74HC244BQ 40 C to +125 C DHVQFN20 plastic dual-in-line compatible thermal enhanced
very thin quad flat package; no leads; 20 terminals;
body 2.5 4.5 0.85 mm
SOT764-1
74HCT244BQ
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 2 of 18
NXP Semiconductors
74HC244; 74HCT244
Octal buffer/line driver; 3-state
4. Functional diagram
Fig 1. Functional diagram
mna875
1A3
1A2
1A1
1A0
2
4
6
8
1
1Y0
1Y1
18
16
14
12
1Y2
1Y3
1OE
2A3
2A2
2A1
2A0
17
15
13
11
19
2Y0
2Y1
3
5
7
9
2Y2
2Y3
2OE
Fig 2. Logic symbol Fig 3. IEC logic symbol
mna874
8
6
4
2
1A0
1A1
1A2
1A3
1OE
18
16
1Y0
1Y1
1Y2
1Y3
14
12
1
11
13
15
17
2A0
2A1
2A2
2A3
2OE
3
5
2Y0
2Y1
2Y2
2Y3
7
9
19
12
14
2
4
6
8
18
16
1
EN
mna873
3
5
11
13
15
17
9
7
19
EN
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 V
CC
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
GND
2A3
1OE
V
CC
9
12
8 13
7 14
6 15
5 16
4 17
3 18
2 19
10
11
1
20
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
V
CC
20 supply voltage
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

74HC244N,652

Mfr. #:
Buy 74HC244N,652
Manufacturer:
NXP Semiconductors
Description:
IC BUFFER NON-INVERT 6V 20DIP
Lifecycle:
New from this manufacturer.
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