74LVC244A; 74LVCH244A
Octal buffer/line driver; 3-state
Rev. 11 — 29 April 2021
Product data sheet
1. General description
The 74LVC244A; 74LVCH244A is an octal non-inverting buffer/line driver with 3-state outputs.
The 3-state outputs are controlled by the output enable inputs 1OE and 2OE. A HIGH on nOE
causes the outputs to assume a high-impedance OFF-state. Schmitt-trigger action at all inputs
makes the circuit highly tolerant for slower input rise and fall times.
Inputs can be driven from either 3.3 V or 5.0 V devices. In 3-state operation, outputs can handle
5 V. These features allow the use of these devices as translators in a mixed 3.3 V and 5 V
environment.
The 74LVCH244A bus hold on data inputs eliminates the need for external pull-up resistors to hold
unused inputs.
2. Features and benefits
•
•
•
•
•
•
•
•
5 V tolerant inputs/outputs for interfacing with 5 V logic
Wide supply voltage range from 1.2 V to 3.6 V
CMOS low-power consumption
Direct interface with TTL levels
Inputs accept voltages up to 5.5 V
High-impedance when V
CC
= 0 V
Bus hold on all data inputs (74LVCH244A only)
Complies with JEDEC standard:
•
JESD8-7A (1.65 V to 1.95 V)
•
JESD8-5A (2.3 V to 2.7 V)
•
JESD8-C/JESD36 (2.7 V to 3.6 V)
ESD protection:
•
HBM JESD22-A114F exceeds 2000 V
•
MM JESD22-A115B exceeds 200 V
•
CDM JESD22-C101E exceeds 1000 V
Specified from -40 °C to +85 °C and -40 °C to +125 °C
•
•
Nexperia
74LVC244A; 74LVCH244A
Octal buffer/line driver; 3-state
3. Ordering information
Table 1. Ordering information
Type number
Package
Temperature range
74LVC244AD
74LVCH244AD
74LVC244ADB
74LVC244APW
74LVCH244APW
74LVC244ABQ
74LVCH244ABQ
74LVC244ABZ
-40 °C to +125 °C
-40 °C to +125 °C
-40 °C to +125 °C
-40 °C to +125 °C
SSOP20
TSSOP20
-40 °C to +125 °C
Name
SO20
Description
plastic small outline package; 20 leads;
body width 7.5 mm
plastic shrink small outline package; 20 leads;
body width 5.3 mm
Version
SOT163-1
SOT339-1
plastic thin shrink small outline package; 20 leads; SOT360-1
body width 4.4 mm
SOT764-1
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
DHXQFN20 plastic, leadless dual in-line compatible thermal
enhanced extreme thin quad flat package;
no leads; 20 terminals; 0.4 mm pitch;
body 2 mm × 3.2 mm × 0.48 mm
SOT8020-1
4. Functional diagram
2
1A0
1Y0
18
4
1A1
1Y1
16
6
1A2
1Y2
14
1
EN
18
16
14
12
8
1
1A3
1OE
1Y3
12
2
4
6
8
17
2A0
2Y0
3
15
19
EN
9
7
5
3
mna873
2A1
2Y1
5
13
2A2
2Y2
7
11
13
15
17
11
19
2A3
2OE
2Y3
9
mna875
Fig. 1.
IEC logic diagram
Fig. 2.
Functional diagram
74LVC_LVCH244A
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 11 — 29 April 2021
2 / 18
Nexperia
74LVC244A; 74LVCH244A
Octal buffer/line driver; 3-state
1A0
2
18
1Y0
2A0
17
3
2Y0
1A1
4
16
1Y1
2A1
15
5
2Y1
1A2
6
14
1Y2
2A2
13
7
2Y2
1A3
1OE
8
1
12
1Y3
2A3
2OE
11
19
9
2Y3
mna874
Fig. 3.
Logic symbol
5. Pinning information
5.1. Pinning
74LVC244A
74LVCH244A
1OE
2
3
4
5
6
7
8
9
GND 10
2A3 11
GND
(1)
1
1A0
terminal 1
index area
20 V
CC
19 2OE
18 1Y0
17 2A0
16 1Y1
15 2A1
14 1Y2
13 2A2
12 1Y3
74LVC244A
74LVCH244A
1OE
1A0
2Y0
1A1
2Y1
1A2
2Y2
1A3
2Y3
1
2
3
4
5
6
7
8
9
20 V
CC
19 2OE
18 1Y0
17 2A0
16 1Y1
15 2A1
14 1Y2
13 2A2
12 1Y3
11 2A3
001aad113
2Y0
1A1
2Y1
1A2
2Y2
1A3
2Y3
001aad114
Transparent top view
GND 10
Fig. 4.
Pin configuration SOT163-1 (SO20),
SOT339-1 (SSOP20) and SOT360-1 (TSSOP20)
(1) This is not a ground pin. There is no electrical or
mechanical requirement to solder the pad. In case
soldered, the solder land should remain floating or
connected to GND.
Fig. 5.
Pin configuration SOT764-1 (DHVQFN20)
74LVC_LVCH244A
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 11 — 29 April 2021
3 / 18
Nexperia
74LVC244A; 74LVCH244A
Octal buffer/line driver; 3-state
74LVC244A
20 V
CC
terminal 1
index area
1A0
2Y0
1A1
2Y1
1A2
2Y2
1A3
2Y3
2
3
4
5
6
7
8
9
GND
(1)
10
11
1OE
19 2OE
18 1Y0
17 2A0
16 1Y1
15 2A1
14 1Y2
13 2A2
12 1Y3
aaa-032841
GND
1
Transparent top view
(1) This is not a ground pin. There is no electrical or mechanical requirement to solder the pad. In case soldered,
the solder land should remain floating or connected to GND.
Fig. 6.
Pin configuration SOT8020-1 (DHXQFN20)
5.2. Pin description
Table 2. Pin description
Symbol
1OE, 2OE
1A0, 1A1, 1A2, 1A3
2Y0, 2Y1, 2Y2, 2Y3
GND
2A0, 2A1, 2A2, 2A3
1Y0, 1Y1, 1Y2, 1Y3,
V
CC
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
data output
ground (0 V)
data input
data output
supply voltage
6. Functional description
Table 3. Function table
H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
Control
nOE
L
L
H
Input
nAn
L
H
X
Output
nYn
L
H
Z
2A3
74LVC_LVCH244A
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 11 — 29 April 2021
4 / 18
Nexperia
74LVC244A; 74LVCH244A
Octal buffer/line driver; 3-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 Parameter
V
CC
I
IK
V
I
I
OK
V
O
I
O
I
CC
I
GND
T
stg
P
tot
supply voltage
input clamping current
input voltage
output clamping current
output voltage
output current
supply current
ground current
storage temperature
total power dissipation
T
amb
= -40 °C to +125 °C
SOT163-1; SOT339-1;
SOT360-1; SOT764-1
SOT8020-1
[1]
[2]
[3]
The minimum input voltage ratings may be exceeded if the input current ratings are observed.
The output voltage ratings may be exceeded if the output current ratings are observed.
For SOT163-1 (SO20) package: P
tot
derates linearly with 12.3 mW/K above 109 °C.
For SOT339-1 (SSOP20) package: P
tot
derates linearly with 10.0 mW/K above 100 °C.
For SOT360-1 (TSSOP20) package: P
tot
derates linearly with 10.0 mW/K above 100 °C.
For SOT764-1 (DHVQFN20) package: P
tot
derates linearly with 12.9 mW/K above 111 °C.
Conditions
V
I
< 0 V
[1]
V
O
> V
CC
or V
O
< 0 V
output HIGH or LOW
output 3-state
V
O
= 0 V to V
CC
[2]
[2]
Min
-0.5
-50
-0.5
-
-0.5
-0.5
-
-
-100
-65
[3]
-
-
Max
+6.5
-
+6.5
±50
V
CC
+ 0.5
+6.5
±50
100
-
+150
500
250
Unit
V
mA
V
mA
V
V
mA
mA
mA
°C
mW
mW
8. Recommended operating conditions
Table 5. Recommended operating conditions
Symbol Parameter
V
CC
V
I
V
O
T
amb
Δt/ΔV
supply voltage
functional
input voltage
output voltage
ambient temperature
input transition rise and fall rate
output HIGH or LOW
output 3-state
in free air
V
CC
= 1.2 V to 2.7 V
V
CC
= 2.7 V to 3.6 V
Conditions
Min
1.65
1.2
0
0
0
-40
0
0
Typ
-
-
-
-
-
-
-
-
Max
3.6
3.6
5.5
V
CC
5.5
+125
20
10
Unit
V
V
V
V
V
°C
ns/V
ns/V
74LVC_LVCH244A
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2021. All rights reserved
Product data sheet
Rev. 11 — 29 April 2021
5 / 18
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