74HC244-Q100; 74HCT244-Q100
Octal buffer/line driver; 3-state
Rev. 1 — 7 August 2012
Product data sheet
1. General description
The 74HC244-Q100; 74HCT244-Q100 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. This enables the use of current limiting resistors to interface inputs to voltages in
excess of V
CC
.
This product has been qualified to the Automotive Electronics Council (AEC) standard
Q100 (Grade 1) and is suitable for use in automotive applications.
2. Features and benefits
Automotive product qualification in accordance with AEC-Q100 (Grade 1)
Specified from
40 C
to +85
C
and from
40 C
to +125
C
Input levels:
For 74HC244-Q100: CMOS level
For 74HCT244-Q100: TTL level
Octal bus interface
Non-inverting 3-state outputs
Multiple package options
Complies with JEDEC standard no. 7 A
ESD protection:
MIL-STD-883, method 3015 exceeds 2000 V
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V (C = 200 pF, R = 0
)
NXP Semiconductors
74HC244-Q100; 74HCT244-Q100
Octal buffer/line driver; 3-state
3. Ordering information
Table 1.
Ordering information
Package
Temperature range
74HC244D-Q100
74HCT244D-Q100
74HC244PW-Q100
74HCT244PW-Q100
74HC244BQ-Q100
74HCT244BQ-Q100
40 C
to +125
C
40 C
to +125
C
TSSOP20
40 C
to +125
C
Name
SO20
Description
plastic small outline package; 20 leads;
body width 7.5 mm
plastic thin shrink small outline package; 20 leads;
body width 4.4 mm
Version
SOT163-1
SOT360-1
Type number
DHVQFN20 plastic dual-in-line compatible thermal enhanced
SOT764-1
very thin quad flat package; no leads; 20 terminals;
body 2.5
4.5
0.85 mm
4. Functional diagram
2
1A0
1Y0
18
4
1A1
1Y1
16
6
1A2
1Y2
14
8
1
1A3
1OE
1Y3
12
17
2A0
2Y0
3
15
2A1
2Y1
5
13
2A2
2Y2
7
11
19
2A3
2OE
2Y3
9
mna875
Fig 1.
Functional diagram
74HC_HCT244_Q100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1. — 7 August 2012
2 of 17
NXP Semiconductors
74HC244-Q100; 74HCT244-Q100
Octal buffer/line driver; 3-state
1
EN
18
16
14
12
1A0
2
18
1Y0
2A0
17
3
2Y0
2
4
1A1
4
16
1Y1
2A1
15
5
2Y1
6
8
1A2
6
14
1Y2
2A2
13
7
2Y2
19
EN
9
7
5
3
mna873
1A3
1OE
8
1
12
1Y3
2A3
2OE
11
19
9
2Y3
11
13
mna874
15
17
Fig 2.
Logic symbol
Fig 3.
IEC logic symbol
5. Pinning information
5.1 Pinning
+&$4
+&7$4
2(
*1'
$
*1'
WHUPLQDO
LQGH[ DUHD
9
&&
2(
<
$
<
$
<
$
<
+&$4
+&7$4
2(
$
<
$
<
$
<
$
<
9
&&
2(
<
$
<
$
<
$
<
$
DDD
$
<
$
<
$
<
$
<
*1'
DDD
7UDQVSDUHQW WRS YLHZ
(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 SO20, TSSOP20
Fig 5.
Pin configuration DHVQFN20
74HC_HCT244_Q100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1. — 7 August 2012
3 of 17
NXP Semiconductors
74HC244-Q100; 74HCT244-Q100
Octal buffer/line driver; 3-state
5.2 Pin description
Table 2.
Symbol
1OE, 2OE
1A0, 1A1, 1A2, 1A3
2Y0, 2Y1, 2Y2, 2Y3
GND
2A0, 2A1, 2A2, 2A3
1Y0, 1Y1, 1Y2, 1Y3
V
CC
Pin description
Pin
1, 19
2, 4, 6, 8
3, 5, 7, 9
10
17, 15, 13, 11
18, 16, 14, 12
20
Description
output enable input (active LOW)
data input
bus output
ground (0 V)
data input
bus output
supply voltage
6. Functional description
Table 3.
Input
nOE
L
L
H
[1]
Function table
[1]
Output
nAn
L
H
X
nYn
L
H
Z
H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
7. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
V
CC
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
[1]
Parameter
supply voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
Conditions
V
I
<
0.5
V or V
I
> V
CC
+ 0.5 V
V
O
<
0.5
V or V
O
> V
CC
+ 0.5 V
0.5
V < V
O
< V
CC
+ 0.5 V
Min
0.5
-
-
-
-
70
65
[1]
Max
+7
20
20
35
70
-
+150
500
Unit
V
mA
mA
mA
mA
mA
C
mW
-
For SO20 packages: above 70
C,
P
tot
derates linearly with 8 mW/K.
For TSSOP20 package: above 60
C,
P
tot
derates linearly with 5.5 mW/K.
For DHVQFN20 packages: above 60
C,
P
tot
derates linearly with 4.5 mW/K.
74HC_HCT244_Q100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1. — 7 August 2012
4 of 17
NXP Semiconductors
74HC244-Q100; 74HCT244-Q100
Octal buffer/line driver; 3-state
8. Recommended operating conditions
Table 5.
Symbol
V
CC
V
I
V
O
t/V
Recommended operating conditions
Parameter
supply voltage
input voltage
output voltage
input transition rise and fall rate V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
T
amb
V
CC
V
I
V
O
t/V
T
amb
ambient temperature
supply voltage
input voltage
output voltage
input transition rise and fall rate V
CC
= 4.5 V
ambient temperature
74HCT244-Q100
4.5
0
0
-
40
5.0
-
-
1.67
-
5.5
V
CC
V
CC
139
+125
V
V
V
ns/V
C
Conditions
Min
2.0
0
0
-
-
-
40
Typ
5.0
-
-
-
1.67
-
-
Max
6.0
V
CC
V
CC
625
139
83
+125
Unit
V
V
V
ns/V
ns/V
ns/V
C
74HC244-Q100
9. Static characteristics
Table 6.
Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
74HC244-Q100
V
IH
HIGH-level
input voltage
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
IL
LOW-level
input voltage
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
OH
HIGH-level
V
I
= V
IH
or V
IL
output voltage
I
O
=
20 A;
V
CC
= 2.0 V
I
O
=
20 A;
V
CC
= 4.5 V
I
O
=
20 A;
V
CC
= 6.0 V
I
O
=
6.0
mA; V
CC
= 4.5 V
I
O
=
7.8
mA; V
CC
= 6.0 V
1.5
3.15
4.2
-
-
-
1.9
4.4
5.9
1.2
2.4
3.2
0.8
2.1
2.8
2.0
4.5
6.0
-
-
-
0.5
1.35
1.8
-
-
-
-
-
1.5
3.15
4.2
-
-
-
1.9
4.4
5.9
3.84
5.34
-
-
-
0.5
1.35
1.8
-
-
-
-
-
1.5
3.15
4.2
-
-
-
1.9
4.4
5.9
3.7
5.2
-
-
-
0.5
1.35
1.8
-
-
-
-
-
V
V
V
V
V
V
V
V
V
V
V
Conditions
Min
25
C
Typ
Max
40 C
to +85
C 40 C
to +125
C
Unit
Min
Max
Min
Max
3.98 4.32
5.48 5.81
74HC_HCT244_Q100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1. — 7 August 2012
5 of 17
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