74HC244; 74HCT244
Octal buffer/line driver; 3-state
Rev. 6 — 27 September 2019
Product data sheet
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 VCC.
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 °C to +85 °C and -40 °C to +125 °C
3. Ordering information
Table 1. Ordering information
Type number
Package
74HC244D
Temperature range
Name
Description
Version
-40 °C to +125 °C
SO20
plastic small outline package; 20 leads;
body width 7.5 mm
SOT163-1
-40 °C to +125 °C
SSOP20
plastic shrink small outline package; 20 leads;
body width 5.3 mm
SOT339-1
-40 °C to +125 °C
TSSOP20
plastic thin shrink small outline package;
20 leads; body width 4.4 mm
SOT360-1
-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
74HCT244D
74HC244DB
74HCT244DB
74HC244PW
74HCT244PW
74HC244BQ
74HCT244BQ
SOT764-1
74HC244; 74HCT244
Nexperia
Octal buffer/line driver; 3-state
4. Functional diagram
2
4
6
8
1
17
15
13
11
19
1A0
1Y0
1A1
1Y1
1A2
1Y2
1A3
1Y3
18
16
14
12
1OE
2A0
2Y0
2A1
2Y1
2A2
2Y2
2A3
2Y3
3
5
7
9
2OE
mna875
Fig. 1.
Functional diagram
1
1A0
1A1
1A2
1A3
1OE
2
4
6
8
18
16
14
12
1
1Y0
2A0
1Y1
2A1
1Y2
2A2
1Y3
2A3
2OE
17
15
13
11
3
5
7
9
2Y0
2Y1
2
18
4
16
6
14
8
12
19
2Y2
2Y3
19
EN
EN
11
9
13
7
15
5
17
3
mna874
Fig. 2.
Logic symbol
74HC_HCT244
Product data sheet
mna873
Fig. 3.
IEC logic symbol
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74HC244; 74HCT244
Nexperia
Octal buffer/line driver; 3-state
5. Pinning information
5.1. Pinning
1
terminal 1
index area
74HC244
74HCT244
1A0
2
19 2OE
2Y0
3
18 1Y0
1A1
4
17 2A0
2Y1
5
16 1Y1
1OE
1
20 VCC
1A2
6
15 2A1
1A0
2
19 2OE
2Y0
3
18 1Y0
2Y2
7
1A1
4
17 2A0
1A3
8
2Y1
5
16 1Y1
2Y3
9
1A2
6
15 2A1
2Y2
7
14 1Y2
1A3
8
13 2A2
2Y3
9
12 1Y3
GND 10
11 2A3
Pin configuration SOT163-1 (SO20),
SOT339-1 (SSOP20) and SOT360-1 (TSSOP20)
14 1Y2
GND (1)
13 2A2
2A3 11
GND 10
12 1Y3
001aae012
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.
001aae011
Fig. 4.
20 VCC
1OE
74HC244
74HCT244
Fig. 5.
Pin configuration SOT764-1 (DHVQFN20)
5.2. Pin description
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
6. Functional description
Table 3. Function table
H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
Output
Input
nOE
nAn
nYn
L
L
L
L
H
H
H
X
Z
74HC_HCT244
Product data sheet
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74HC244; 74HCT244
Nexperia
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
Conditions
Min
Max
Unit
-0.5
+7
V
VCC
supply voltage
IIK
input clamping current
VI < -0.5 V or VI > VCC + 0.5 V
-
±20
mA
IOK
output clamping current
VO < -0.5 V or VO > VCC + 0.5 V
-
±20
mA
IO
output current
-0.5 V < VO < VCC + 0.5 V
-
±35
mA
ICC
supply current
-
70
mA
IGND
ground current
-70
-
mA
Tstg
storage temperature
-65
+150
°C
Ptot
total power dissipation
-
500
mW
Min
Typ
Max
Unit
[1]
[1]
For SOT163-1 (SO20) packages: Ptot derates linearly with 12.3 mW/K above 109 °C.
For SOT339-1 (SSOP20) packages: Ptot derates linearly with 10.0 mW/K above 100 °C.
For SOT360-1 (TSSOP20) packages: Ptot derates linearly with 10.0 mW/K above 100 °C.
For SOT764-1 (DHVQFN20) packages: Ptot derates linearly with 12.9 mW/K above 111 °C.
8. Recommended operating conditions
Table 5. Recommended operating conditions
Symbol Parameter
Conditions
74HC244
VCC
supply voltage
2.0
5.0
6.0
V
VI
input voltage
0
-
VCC
V
VO
output voltage
0
-
VCC
V
Δt/ΔV
input transition rise and fall rate
VCC = 2.0 V
-
-
625
ns/V
VCC = 4.5 V
-
1.67
139
ns/V
ns/V
VCC = 6.0 V
Tamb
ambient temperature
-
-
83
-40
-
+125
°C
4.5
5.0
5.5
V
0
-
VCC
V
0
-
VCC
V
-
1.67
139
ns/V
-40
-
+125
°C
74HCT244
VCC
supply voltage
VI
input voltage
VO
output voltage
Δt/ΔV
input transition rise and fall rate
Tamb
ambient temperature
74HC_HCT244
Product data sheet
VCC = 4.5 V
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74HC244; 74HCT244
Nexperia
Octal buffer/line driver; 3-state
9. Static characteristics
Table 6. Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
25 °C
-40 °C to +85 °C -40 °C to +125 °C Unit
Min
Typ
Max
Min
Max
Min
Max
74HC244
VIH
VIL
VOH
VOL
VCC = 2.0 V
HIGH-level
input voltage V = 4.5 V
CC
1.5
1.2
-
1.5
-
1.5
-
V
3.15
2.4
-
3.15
-
3.15
-
V
VCC = 6.0 V
4.2
3.2
-
4.2
-
4.2
-
V
VCC = 2.0 V
LOW-level
input voltage V = 4.5 V
CC
-
0.8
0.5
-
0.5
-
0.5
V
-
2.1
1.35
-
1.35
-
1.35
V
VCC = 6.0 V
-
2.8
1.8
-
1.8
-
1.8
V
IO = -20 μA; VCC = 2.0 V
1.9
2.0
-
1.9
-
1.9
-
V
IO = -20 μA; VCC = 4.5 V
4.4
4.5
-
4.4
-
4.4
-
V
IO = -20 μA; VCC = 6.0 V
5.9
6.0
-
5.9
-
5.9
-
V
IO = -6.0 mA; VCC = 4.5 V
3.98
4.32
-
3.84
-
3.7
-
V
IO = -7.8 mA; VCC = 6.0 V
5.48
5.81
-
5.34
-
5.2
-
V
IO = 20 μA; VCC = 2.0 V
-
0
0.1
-
0.1
-
0.1
V
IO = 20 μA; VCC = 4.5 V
-
0
0.1
-
0.1
-
0.1
V
IO = 20 μA; VCC = 6.0 V
-
0
0.1
-
0.1
-
0.1
V
IO = 6.0 mA; VCC = 4.5 V
-
0.15
0.26
-
0.33
-
0.4
V
IO = 7.8 mA; VCC = 6.0 V
-
0.16
0.26
-
0.33
-
0.4
V
HIGH-level
output
voltage
LOW-level
output
voltage
VI = VIH or VIL
VI = VIH or VIL
II
input leakage VI = VCC or GND; VCC = 6.0 V
current
-
-
±0.1
-
±1.0
-
±1.0
μA
IOZ
OFF-state
output
current
VI = VIH or VIL; VCC = 6.0 V;
VO = VCC or GND
-
-
±0.5
-
±5.0
-
±10
μA
ICC
supply
current
VI = VCC or GND; IO = 0 A;
VCC = 6.0 V
-
-
8.0
-
80
-
160
μA
CI
input
capacitance
-
3.5
-
-
-
-
-
pF
74HC_HCT244
Product data sheet
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74HC244; 74HCT244
Nexperia
Octal buffer/line driver; 3-state
Symbol Parameter
Conditions
25 °C
-40 °C to +85 °C -40 °C to +125 °C Unit
Min
Typ
Max
Min
Max
Min
Max
74HCT244
VIH
HIGH-level
VCC = 4.5 V to 5.5 V
input voltage
2.0
1.6
-
2.0
-
2.0
-
V
VIL
LOW-level
VCC = 4.5 V to 5.5 V
input voltage
-
1.2
0.8
-
0.8
-
0.8
V
VOH
HIGH-level
output
voltage
VI = VIH or VIL; VCC = 4.5 V
IO = -20 μA
4.4
4.5
-
4.4
-
4.4
-
V
IO = -6 mA
3.98
4.32
-
3.84
-
3.7
-
V
LOW-level
output
voltage
VI = VIH or VIL; VCC = 4.5 V
IO = 20 μA
-
0
0.1
-
0.1
-
0.1
V
IO = 6.0 mA
VOL
-
0.16
0.26
-
0.33
-
0.4
V
II
input leakage VI = VCC or GND; VCC = 5.5 V
current
-
-
±0.1
-
±1.0
-
±1.0
μA
IOZ
OFF-state
output
current
VI = VIH or VIL; VCC = 5.5 V;
VO = VCC or GND
-
-
±0.5
-
±5.0
-
±10
μA
ICC
supply
current
VI = VCC or GND; VCC = 5.5 V;
IO = 0 A
-
-
8.0
-
80
-
160
μA
ΔICC
additional
supply
current
per input pin; VI = VCC - 2.1 V;
other inputs at VCC or GND;
VCC = 4.5 V to 5.5 V; IO = 0 A
-
70
252
-
315
-
343
μA
CI
input
capacitance
-
3.5
-
-
-
-
-
pF
74HC_HCT244
Product data sheet
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74HC244; 74HCT244
Nexperia
Octal buffer/line driver; 3-state
10. Dynamic characteristics
Table 7. Dynamic characteristics
GND = 0 V; for test circuit see Fig. 8.
Symbol Parameter
Conditions
-40 °C to -40 °C to Unit
+85 °C
+125 °C
25 °C
Min
Typ
Max
Max
Max
VCC = 2.0 V
-
30
110
145
165
ns
VCC = 4.5 V
-
11
22
28
33
ns
VCC = 5.0 V; CL = 15 pF
-
9
-
-
-
ns
-
9
19
24
28
ns
VCC = 2.0 V
-
36
150
190
225
ns
VCC = 4.5 V
-
13
30
38
45
ns
VCC = 6.0 V
-
10
26
33
38
ns
VCC = 2.0 V
-
39
150
190
225
ns
VCC = 4.5 V
-
14
30
38
45
ns
VCC = 6.0 V
-
11
26
33
38
ns
VCC = 2.0 V
-
14
60
75
90
ns
VCC = 4.5 V
-
5
12
15
18
ns
VCC = 6.0 V
-
4
10
13
15
ns
-
35
-
-
-
pF
VCC = 4.5 V
-
13
22
28
33
ns
VCC = 5.0 V; CL = 15 pF
-
11
-
-
-
ns
74HC244
tpd
propagation
delay
nAn to nYn; see Fig. 6
[1]
VCC = 6.0 V
ten
enable time
tdis
disable time
tt
transition time
CPD
nOE to nYn; see Fig. 7
nOE to nYn; see Fig. 7
see Fig. 6
[2]
[3]
[4]
power dissipation per buffer; VI = GND to VCC
capacitance
[5]
74HCT244
tpd
propagation
delay
nAn to nYn; see Fig. 6
[1]
ten
enable time
nOE to nYn; VCC = 4.5 V; see Fig. 7
[2]
-
15
30
38
45
ns
tdis
disable time
nOE to nYn; VCC = 4.5 V; see Fig. 7
[3]
-
15
25
31
38
ns
tt
transition time
VCC = 4.5 V; see Fig. 6
[4]
-
5
12
15
18
ns
CPD
power dissipation per buffer; VI = GND to VCC - 1.5 V
capacitance
[5]
-
35
-
-
-
pF
[1]
[2]
[3]
[4]
[5]
tpd is the same as tPHL and tPLH.
ten is the same as tPZH and tPZL.
tdis is the same as tPHZ and tPLZ.
tt is the same as tTHL and tTLH.
2
2
CPD is used to determine the dynamic power dissipation (PD in μW): PD = CPD × VCC × fi × N + Σ (CL × VCC × fo) where:
fi = input frequency in MHz; fo = output frequency in MHz;
CL = output load capacitance in pF; VCC = supply voltage in V;
2
N = number of inputs switching; Σ (CL × VCC × fo) = sum of outputs.
74HC_HCT244
Product data sheet
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74HC244; 74HCT244
Nexperia
Octal buffer/line driver; 3-state
10.1. Waveforms
VI
VM
nAn input
VM
GND
t PHL
VOH
90 %
VM
VM
nYn output
t PLH
10 %
VOL
t THL
t TLH
001aae013
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig. 6.
Input (nAn) to output (nYn) propagation delays and output transition times
VI
nOE input
VM
GND
t PLZ
nYn output
LOW-to-OFF
OFF-to-LOW
t PZL
VCC
VM
VX
VOL
t PZH
t PHZ
nYn output
HIGH-to-OFF
OFF-to-HIGH
VOH
VY
VM
GND
outputs
enabled
outputs
disabled
outputs
enabled
001aae014
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig. 7.
3-state enable and disable times
Table 8. Measurement points
Input
Type
Output
VM
VM
VX
VY
74HC244
0.5 × VCC
0.5 × VCC
0.1 × VCC
0.9 × VCC
74HCT244
1.3 V
1.3 V
0.1 × VCC
0.9 × VCC
74HC_HCT244
Product data sheet
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74HC244; 74HCT244
Nexperia
Octal buffer/line driver; 3-state
VI
negative
pulse
tW
90 %
VM
0V
VI
positive
pulse
0V
VM
10 %
tf
tr
tr
tf
90 %
VM
VM
10 %
tW
VCC
G
VI
DUT
VCC
VO
RT
RL
S1
open
CL
001aad983
Test data is given in Table 9.
Definitions test circuit:
RT = Termination resistance should be equal to output impedance Zo of the pulse generator.
CL = Load capacitance including jig and probe capacitance.
RL = Load resistance.
S1 = Test selection switch.
Fig. 8.
Test circuit for measuring switching times
Table 9. Test data
Type
Input
Load
VI
tr, tf
CL
74HC244
VCC
6 ns
74HCT244
3V
6 ns
74HC_HCT244
Product data sheet
S1 position
RL
tPHL, tPLH
tPZH, tPHZ
tPZL, tPLZ
15 pF, 50 pF 1 kΩ
open
GND
VCC
15 pF, 50 pF 1 kΩ
open
GND
VCC
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74HC244; 74HCT244
Nexperia
Octal buffer/line driver; 3-state
11. Package outline
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
D
E
A
X
c
y
HE
v M A
Z
20
11
Q
A2
A
(A 3 )
A1
pin 1 index
θ
Lp
L
1
10
e
bp
detail X
w M
0
5
10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
HE
L
Lp
Q
v
w
y
mm
2.65
0.3
0.1
2.45
2.25
0.25
0.49
0.36
0.32
0.23
13.0
12.6
7.6
7.4
1.27
10.65
10.00
1.4
1.1
0.4
1.1
1.0
0.25
0.25
0.1
0.9
0.4
inches
0.1
0.012 0.096
0.004 0.089
0.01
0.019 0.013
0.014 0.009
0.51
0.49
0.30
0.29
0.05
0.419
0.043
0.055
0.394
0.016
0.043
0.039
0.01
0.01
0.004
0.035
0.016
Z
(1)
θ
o
8
o
0
Note
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
Fig. 9.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
SOT163-1
075E04
MS-013
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-19
Package outline SOT163-1 (SO20)
74HC_HCT244
Product data sheet
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Rev. 6 — 27 September 2019
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Nexperia B.V. 2019. All rights reserved
10 / 16
74HC244; 74HCT244
Nexperia
Octal buffer/line driver; 3-state
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
D
SOT339-1
E
A
X
c
HE
y
v M A
Z
20
11
Q
A2
pin 1 index
A
(A 3)
A1
θ
Lp
L
1
10
bp
e
detail X
w M
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
HE
L
Lp
Q
v
w
y
Z (1)
θ
mm
2
0.21
0.05
1.80
1.65
0.25
0.38
0.25
0.20
0.09
7.4
7.0
5.4
5.2
0.65
7.9
7.6
1.25
1.03
0.63
0.9
0.7
0.2
0.13
0.1
0.9
0.5
8o
0o
Note
1. Plastic or metal protrusions of 0.2 mm maximum per side are not included.
OUTLINE
VERSION
SOT339-1
REFERENCES
IEC
JEDEC
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-19
MO-150
Fig. 10. Package outline SOT339-1 (SSOP20)
74HC_HCT244
Product data sheet
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74HC244; 74HCT244
Nexperia
Octal buffer/line driver; 3-state
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm
D
SOT360-1
E
A
X
c
HE
y
v M A
Z
11
20
Q
A2
pin 1 index
(A 3 )
A1
A
θ
Lp
1
L
10
detail X
w M
bp
e
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (2)
e
HE
L
Lp
Q
v
w
y
Z (1)
θ
mm
1.1
0.15
0.05
0.95
0.80
0.25
0.30
0.19
0.2
0.1
6.6
6.4
4.5
4.3
0.65
6.6
6.2
1
0.75
0.50
0.4
0.3
0.2
0.13
0.1
0.5
0.2
8o
0o
Notes
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
SOT360-1
REFERENCES
IEC
JEDEC
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-19
MO-153
Fig. 11. Package outline SOT360-1 (TSSOP20)
74HC_HCT244
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 27 September 2019
©
Nexperia B.V. 2019. All rights reserved
12 / 16
74HC244; 74HCT244
Nexperia
Octal buffer/line driver; 3-state
DHVQFN20: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads;
20 terminals; body 2.5 x 4.5 x 0.85 mm
B
D
SOT764-1
A
A
A1
E
c
detail X
terminal 1
index area
terminal 1
index area
e1
C
e
b
2
9
v
w
C A B
C
y1 C
y
L
1
10
Eh
e
20
11
19
12
X
Dh
0
2.5
5 mm
scale
Dimensions (mm are the original dimensions)
Unit
A(1)
A1
b
max 1.00 0.05 0.30
nom 0.90 0.02 0.25
min 0.80 0.00 0.18
mm
c
D(1)
Dh
E(1)
Eh
e
e1
L
v
0.2
4.6
4.5
4.4
3.15
3.00
2.85
2.6
2.5
2.4
1.15
1.00
0.85
0.5
3.5
0.5
0.4
0.3
0.1
w
y
0.05 0.05
y1
0.1
Note
1. Plastic or metal protrusions of 0.075 mm maximum per side are not included.
References
Outline
version
IEC
JEDEC
JEITA
SOT764-1
---
MO-241
---
sot764-1_po
European
projection
Issue date
03-01-27
14-12-12
Fig. 12. Package outline SOT764-1 (DHVQFN20)
74HC_HCT244
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 27 September 2019
©
Nexperia B.V. 2019. All rights reserved
13 / 16
74HC244; 74HCT244
Nexperia
Octal buffer/line driver; 3-state
12. Abbreviations
Table 10. Abbreviations
Acronym
Description
CMOS
Complementary Metal Oxide Semiconductor
DUT
Device Under Test
ESD
ElectroStatic Discharge
HBM
Human Body Model
MM
Machine Model
TTL
Transistor-Transistor Logic
13. Revision history
Table 11. Revision history
Document ID
Release date
Data sheet status
Change notice Supersedes
74HC_HCT244 v.6
20190927
Product data sheet
-
Modifications:
•
•
•
The format of this data sheet has been redesigned to comply with the identity
guidelines of Nexperia.
Legal texts have been adapted to the new company name where appropriate.
Table 4: Derating values for Ptot total power dissipation have been updated.
74HC_HCT244 v.5
20160226
Modifications:
•
74HC_HCT244 v.4
20120924
Modifications:
•
•
74HC_HCT244 v.5
Product data sheet
-
74HC_HCT244 v.4
Type numbers 74HC244N and 74HCT244N (SOT146-1) removed.
Product data sheet
-
74HC_HCT244 v.3
The format of this data sheet has been redesigned to comply with the new identity
guidelines of NXP Semiconductors.
Legal texts have been adapted to the new company name where appropriate.
74HC_HCT244 v.3
20051222
Product data sheet
-
74HC_HCT244_CNV v.2
74HC_HCT244_CNV v.2
19901201
Product specification
-
-
74HC_HCT244
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 27 September 2019
©
Nexperia B.V. 2019. All rights reserved
14 / 16
74HC244; 74HCT244
Nexperia
Octal buffer/line driver; 3-state
14. Legal information
injury, death or severe property or environmental damage. Nexperia and its
suppliers accept no liability for inclusion and/or use of Nexperia products in
such equipment or applications and therefore such inclusion and/or use is at
the customer’s own risk.
Data sheet status
Quick reference data — The Quick reference data is an extract of the
product data given in the Limiting values and Characteristics sections of this
document, and as such is not complete, exhaustive or legally binding.
Document status
[1][2]
Product
status [3]
Definition
Objective [short]
data sheet
Development
This document contains data from
the objective specification for
product development.
Preliminary [short]
data sheet
Qualification
This document contains data from
the preliminary specification.
Product [short]
data sheet
Production
This document contains the product
specification.
[1]
[2]
[3]
Please consult the most recently issued document before initiating or
completing a design.
The term 'short data sheet' is explained in section "Definitions".
The product status of device(s) described in this document may have
changed since this document was published and may differ in case of
multiple devices. The latest product status information is available on
the internet at https://www.nexperia.com.
Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. Nexperia does not give any representations or
warranties as to the accuracy or completeness of information included herein
and shall have no liability for the consequences of use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is
intended for quick reference only and should not be relied upon to contain
detailed and full information. For detailed and full information see the relevant
full data sheet, which is available on request via the local Nexperia sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
Product specification — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
Nexperia and its customer, unless Nexperia and customer have explicitly
agreed otherwise in writing. In no event however, shall an agreement be
valid in which the Nexperia product is deemed to offer functions and qualities
beyond those described in the Product data sheet.
Disclaimers
Limited warranty and liability — Information in this document is believed
to be accurate and reliable. However, Nexperia does not give any
representations or warranties, expressed or implied, as to the accuracy
or completeness of such information and shall have no liability for the
consequences of use of such information. Nexperia takes no responsibility
for the content in this document if provided by an information source outside
of Nexperia.
In no event shall Nexperia be liable for any indirect, incidental, punitive,
special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal
or replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, Nexperia’s aggregate and cumulative liability towards customer
for the products described herein shall be limited in accordance with the
Terms and conditions of commercial sale of Nexperia.
Right to make changes — Nexperia reserves the right to make changes
to information published in this document, including without limitation
specifications and product descriptions, at any time and without notice. This
document supersedes and replaces all information supplied prior to the
publication hereof.
Suitability for use — Nexperia products are not designed, authorized or
warranted to be suitable for use in life support, life-critical or safety-critical
systems or equipment, nor in applications where failure or malfunction
of an Nexperia product can reasonably be expected to result in personal
74HC_HCT244
Product data sheet
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. Nexperia makes no representation
or warranty that such applications will be suitable for the specified use
without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using Nexperia products, and Nexperia accepts no liability for
any assistance with applications or customer product design. It is customer’s
sole responsibility to determine whether the Nexperia product is suitable
and fit for the customer’s applications and products planned, as well as
for the planned application and use of customer’s third party customer(s).
Customers should provide appropriate design and operating safeguards to
minimize the risks associated with their applications and products.
Nexperia does not accept any liability related to any default, damage, costs
or problem which is based on any weakness or default in the customer’s
applications or products, or the application or use by customer’s third party
customer(s). Customer is responsible for doing all necessary testing for the
customer’s applications and products using Nexperia products in order to
avoid a default of the applications and the products or of the application or
use by customer’s third party customer(s). Nexperia does not accept any
liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those
given in the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — Nexperia products are
sold subject to the general terms and conditions of commercial sale, as
published at http://www.nexperia.com/profile/terms, unless otherwise agreed
in a valid written individual agreement. In case an individual agreement is
concluded only the terms and conditions of the respective agreement shall
apply. Nexperia hereby expressly objects to applying the customer’s general
terms and conditions with regard to the purchase of Nexperia products by
customer.
No offer to sell or license — Nothing in this document may be interpreted
or construed as an offer to sell products that is open for acceptance or the
grant, conveyance or implication of any license under any copyrights, patents
or other industrial or intellectual property rights.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
Non-automotive qualified products — Unless this data sheet expressly
states that this specific Nexperia product is automotive qualified, the
product is not suitable for automotive use. It is neither qualified nor tested in
accordance with automotive testing or application requirements. Nexperia
accepts no liability for inclusion and/or use of non-automotive qualified
products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in
automotive applications to automotive specifications and standards,
customer (a) shall use the product without Nexperia’s warranty of the
product for such automotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
Nexperia’s specifications such use shall be solely at customer’s own risk,
and (c) customer fully indemnifies Nexperia for any liability, damages or failed
product claims resulting from customer design and use of the product for
automotive applications beyond Nexperia’s standard warranty and Nexperia’s
product specifications.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
Trademarks
Notice: All referenced brands, product names, service names and
trademarks are the property of their respective owners.
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 27 September 2019
©
Nexperia B.V. 2019. All rights reserved
15 / 16
74HC244; 74HCT244
Nexperia
Octal buffer/line driver; 3-state
Contents
1. General description...................................................... 1
2. Features and benefits.................................................. 1
3. Ordering information....................................................1
4. Functional diagram.......................................................2
5. Pinning information......................................................3
5.1. Pinning.........................................................................3
5.2. Pin description............................................................. 3
6. Functional description................................................. 3
7. Limiting values............................................................. 4
8. Recommended operating conditions..........................4
9. Static characteristics....................................................5
10. Dynamic characteristics............................................ 7
10.1. Waveforms.................................................................8
11. Package outline........................................................ 10
12. Abbreviations............................................................ 14
13. Revision history........................................................14
14. Legal information......................................................15
©
Nexperia B.V. 2019. All rights reserved
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Date of release: 27 September 2019
74HC_HCT244
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 27 September 2019
©
Nexperia B.V. 2019. All rights reserved
16 / 16
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