74VHC244; 74VHCT244
Octal buffer/line driver; 3-state
Rev. 01 — 17 August 2009
Product data sheet
1. General description
The 74VHC244; 74VHCT244 are a high-speed Si-gate CMOS devices.
The 74VHC244; 74VHCT244 have octal non-inverting buffer/line drivers with 3-state
outputs. The 3-state outputs are controlled by the output enable inputs (nOE). A HIGH on
nOE causes the outputs to assume a high-impedance OFF-state.
2. Features
I
I
I
I
Balanced propagation delays
All inputs have a Schmitt-trigger action
Inputs accepts voltages higher than V
CC
Input levels:
N
The 74VHC244 operates with CMOS input level
N
The 74VHCT244 operates with TTL input level
I
ESD protection:
N
HBM JESD22-A114E exceeds 2000 V
N
MM JESD22-A115-A exceeds 200 V
N
CDM JESD22-C101C exceeds 1000 V
I
Multiple package options
I
Specified from
−40 °C
to +85
°C
and from
−40 °C
to +125
°C
3. Ordering information
Table 1.
Ordering information
Package
Temperature range
74VHC244D
74VHCT244D
74VHC244PW
74VHCT244PW
74VHC244BQ
74VHCT244BQ
−40 °C
to +125
°C
DHVQFN20
−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
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
NXP Semiconductors
74VHC244; 74VHCT244
Octal buffer/line driver; 3-state
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
mna170
Fig 1.
Functional diagram
1
EN
18
16
14
12
2
4
1A0
2
18
1Y0
2A0
17
3
6
2Y0
8
1A1
4
16
1Y1
2A1
15
5
2Y1
19
EN
9
7
5
3
mna873
1A2
6
14
1Y2
2A2
13
7
2Y2
11
13
1A3
1OE
8
1
12
1Y3
2A3
2OE
11
19
9
2Y3
15
17
mna874
Fig 2.
Logic symbol
Fig 3.
IEC logic symbol
74VHC_VHCT244_1
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 17 August 2009
2 of 16
NXP Semiconductors
74VHC244; 74VHCT244
Octal buffer/line driver; 3-state
5. Pinning information
5.1 Pinning
74VHC244
74VHCT244
1OE
2
3
4
5
6
7
8
9
GND 10
2A3 11
GND
(1)
1
terminal 1
index area
20 V
CC
19 2OE
18 1Y0
17 2A0
16 1Y1
15 2A1
14 1Y2
13 2A2
12 1Y3
74VHC244
74VHCT244
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
001aak057
1A0
2Y0
1A1
2Y1
1A2
2Y2
1A3
2Y3
GND 10
001aak058
Transparent top view
(1) The die substrate is attached to this pad using
conductive die attach material. It can not be used as a
supply pin or input.
Fig 4.
Pin configuration SO20, TSSOP20
Fig 5.
Pin configuration DHVQFN20
5.2 Pin description
Table 2.
Symbol
1OE
1A[0:3]
2A[0:3]
1Y[0:3]
2Y[0:3]
GND
2OE
V
CC
Pin description
Pin
1
2, 4, 6, 8
Description
output enable input (active LOW)
data input
17, 15, 13, 11 data input
18, 16, 14, 12 data output
3, 5, 7, 9
10
19
20
data output
ground (0 V)
output enable input (active LOW)
supply voltage
74VHC_VHCT244_1
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 17 August 2009
3 of 16
NXP Semiconductors
74VHC244; 74VHCT244
Octal buffer/line driver; 3-state
6. Functional description
Table 3.
Control
nOE
L
H
[1]
H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
Function table
[1]
Input
nAn
L
H
X
Output
nYn
L
H
Z
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
V
I
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
Parameter
supply voltage
input voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
SO20 package
TSSOP20 package
DHVQFN20 package
[1]
[2]
[3]
[4]
Conditions
Min
−0.5
−0.5
Max
+7.0
+7.0
-
±20
±25
75
-
+150
500
500
500
Unit
V
V
mA
mA
mA
mA
mA
°C
mW
mW
mW
V
I
<
−0.5
V
V
O
<
−0.5
V or V
O
> V
CC
+ 0.5 V
V
O
=
−0.5
V to (V
CC
+ 0.5 V)
[1]
[1]
−20
-
-
-
−75
−65
T
amb
=
−40 °C
to +125
°C
[2]
[3]
[4]
-
-
-
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
P
tot
derates linearly with 8 mW/K above 70
°C.
P
tot
derates linearly with 5.5 mW/K above 60
°C.
P
tot
derates linearly with 4.5 mW/K above 60
°C.
74VHC_VHCT244_1
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 17 August 2009
4 of 16
NXP Semiconductors
74VHC244; 74VHCT244
Octal buffer/line driver; 3-state
8. Recommended operating conditions
Table 5.
Recommended operating conditions
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
V
CC
V
I
V
O
T
amb
∆t/∆V
supply voltage
input voltage
output voltage
ambient temperature
input transition rise
and fall rate
V
CC
= 3.3 V
±
0.3 V
V
CC
= 5.0 V
±
0.5 V
Conditions
74VHC244
Min
2.0
0
0
−40
-
-
Typ
5.0
-
-
+25
-
-
Max
5.5
5.5
V
CC
+125
100
20
74VHCT244
Min
4.5
0
0
−40
-
-
Typ
5.0
-
-
+25
-
-
Max
5.5
5.5
V
CC
+125
-
20
V
V
V
°C
ns/V
ns/V
Unit
9. Static characteristics
Table 6.
Static characteristics
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
For type 74VHC244
V
IH
HIGH-level
input voltage
V
CC
= 2.0 V
V
CC
= 3.0 V
V
CC
= 5.5 V
V
IL
LOW-level
input voltage
V
CC
= 2.0 V
V
CC
= 3.0 V
V
CC
= 5.5 V
V
OH
HIGH-level
V
I
= V
IH
or V
IL
output voltage
I
O
=
−50 µA;
V
CC
= 2.0 V
I
O
=
−50 µA;
V
CC
= 3.0 V
I
O
=
−50 µA;
V
CC
= 4.5 V
I
O
=
−4.0
mA; V
CC
= 3.0 V
I
O
=
−8.0
mA; V
CC
= 4.5 V
V
OL
LOW-level
V
I
= V
IH
or V
IL
output voltage
I
O
= 50
µA;
V
CC
= 2.0 V
I
O
= 50
µA;
V
CC
= 3.0 V
I
O
= 50
µA;
V
CC
= 4.5 V
I
O
= 4.0 mA; V
CC
= 3.0 V
I
O
= 8.0 mA; V
CC
= 4.5 V
I
OZ
OFF-state
V
I
= V
IH
or V
IL
;
output current V
O
= V
CC
or GND;
V
CC
= 5.5 V
input leakage
current
V
I
= 5.5 V or GND;
V
CC
= 0 V to 5.5 V
1.5
2.1
3.85
-
-
-
1.9
2.9
4.4
2.58
3.94
-
-
-
-
-
-
-
-
-
-
-
-
2.0
3.0
4.5
-
-
0
0
0
-
-
-
-
-
-
0.5
0.9
1.65
-
-
-
-
-
0.1
0.1
0.1
0.36
0.36
±0.25
1.5
2.1
3.85
-
-
-
1.9
2.9
4.4
2.48
3.8
-
-
-
-
-
-
-
-
-
0.5
0.9
1.65
-
-
-
-
-
0.1
0.1
0.1
0.44
0.44
±2.5
1.5
2.1
3.85
-
-
-
1.9
2.9
4.4
2.40
3.70
-
-
-
-
-
-
-
-
-
0.5
0.9
1.65
-
-
-
-
-
0.1
0.1
0.1
0.55
0.55
±10.0
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
µA
Conditions
Min
25
°C
Typ
Max
−40 °C
to +85
°C −40 °C
to +125
°C
Unit
Min
Max
Min
Max
I
I
I
CC
-
-
-
-
0.1
4.0
-
-
1.0
40
-
-
2.0
80
µA
µA
supply current V
I
= V
CC
or GND; I
O
= 0 A;
V
CC
= 5.5 V
74VHC_VHCT244_1
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 17 August 2009
5 of 16
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