74VHC244BQ [NEXPERIA]
Octal buffer/line driver; 3-state;
| 型号： | 74VHC244BQ |
| 厂家： | 
Nexperia |
| 描述： | Octal buffer/line driver; 3-state |
| 文件： | 总16页 (文件大小：608K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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 Balanced propagation delays
I All inputs have a Schmitt-trigger action
I Inputs accepts voltages higher than VCC
I 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
Type number
Package
Temperature range
−40 °C to +125 °C
Name
Description
Version
74VHC244D
SO20
plastic small outline package; 20 leads;
body width 7.5 mm
SOT163-1
74VHCT244D
74VHC244PW
74VHCT244PW
74VHC244BQ
74VHCT244BQ
−40 °C to +125 °C
−40 °C to +125 °C
TSSOP20
plastic thin shrink small outline package; 20 leads; SOT360-1
body width 4.4 mm
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
74VHC244; 74VHCT244
Nexperia
Octal buffer/line driver; 3-state
4. Functional diagram
1A0
1A1
1A2
1Y0
18
2
4
6
1Y1
16
1Y2
14
1A3
1Y3
12
8
1
1OE
2A0
2A1
2A2
2Y0
3
17
15
13
2Y1
5
2Y2
7
2A3
2Y3
9
11
19
2OE
mna170
Fig 1. Functional diagram
1
2
EN
18
16
14
12
4
6
8
2
4
6
17
15
13
18
16
14
12
3
1A0
1A1
1A2
1Y0
1Y1
1Y2
1Y3
2A0
2A1
2A2
2Y0
2Y1
2Y2
2Y3
5
7
9
19
11
EN
9
7
5
3
13
15
17
8
1
11
19
1A3
2A3
1OE
2OE
mna874
mna873
Fig 2. Logic symbol
Fig 3. IEC logic symbol
©
74VHC_VHCT244_1
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 01 — 17 August 2009
2 of 16
74VHC244; 74VHCT244
Nexperia
Octal buffer/line driver; 3-state
5. Pinning information
5.1 Pinning
74VHC244
74VHCT244
terminal 1
index area
74VHC244
74VHCT244
2
3
4
5
6
7
8
9
19
18
17
16
15
14
13
12
1A0
2Y0
1A1
2Y1
1A2
2Y2
1A3
2Y3
2OE
1Y0
2A0
1Y1
2A1
1Y2
2A2
1Y3
1
2
20
19
18
17
16
15
14
13
12
11
1OE
1A0
2Y0
1A1
2Y1
1A2
2Y2
1A3
2Y3
GND
V
CC
2OE
1Y0
2A0
1Y1
2A1
1Y2
2A2
1Y3
2A3
3
4
5
6
(1)
GND
7
8
9
001aak058
10
Transparent top view
001aak057
(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
Pin description
Pin
Description
1
output enable input (active LOW)
data input
1A[0:3]
2A[0:3]
1Y[0:3]
2Y[0:3]
GND
2, 4, 6, 8
17, 15, 13, 11 data input
18, 16, 14, 12 data output
3, 5, 7, 9
data output
10
19
20
ground (0 V)
2OE
output enable input (active LOW)
supply voltage
VCC
©
74VHC_VHCT244_1
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 01 — 17 August 2009
3 of 16
74VHC244; 74VHCT244
Nexperia
Octal buffer/line driver; 3-state
6. Functional description
Table 3.
Control
nOE
Function table[1]
Input
nAn
L
Output
nYn
L
L
H
H
H
X
Z
[1] 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
VCC
VI
Parameter
Conditions
Min
−0.5
−0.5
−20
-
Max
+7.0
+7.0
-
Unit
V
supply voltage
input voltage
V
[1]
[1]
IIK
input clamping current
output clamping current
output current
VI < −0.5 V
mA
mA
mA
mA
mA
°C
IOK
VO < −0.5 V or VO > VCC + 0.5 V
VO = −0.5 V to (VCC + 0.5 V)
±20
±25
75
IO
-
ICC
supply current
-
IGND
Tstg
Ptot
ground current
−75
−65
-
storage temperature
total power dissipation
SO20 package
+150
Tamb = −40 °C to +125 °C
[2]
[3]
[4]
-
-
-
500
500
500
mW
mW
mW
TSSOP20 package
DHVQFN20 package
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] Ptot derates linearly with 8 mW/K above 70 °C.
[3] Ptot derates linearly with 5.5 mW/K above 60 °C.
[4] Ptot derates linearly with 4.5 mW/K above 60 °C.
©
74VHC_VHCT244_1
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 01 — 17 August 2009
4 of 16
74VHC244; 74VHCT244
Nexperia
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
Conditions
74VHC244
74VHCT244
Unit
Min
2.0
0
Typ
Max
5.5
Min
4.5
0
Typ
Max
5.5
5.5
VCC
+125
-
VCC
VI
supply voltage
input voltage
5.0
5.0
V
-
5.5
-
V
VO
output voltage
ambient temperature
0
-
VCC
+125
100
20
0
-
V
Tamb
∆t/∆V
−40
-
+25
−40
-
+25
°C
ns/V
ns/V
input transition rise
and fall rate
VCC = 3.3 V ± 0.3 V
VCC = 5.0 V ± 0.5 V
-
-
-
-
-
-
20
9. Static characteristics
Table 6.
Static characteristics
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
25 °C
Min Typ Max
−40 °C to +85 °C −40 °C to +125 °C Unit
Min
Max
Min
Max
For type 74VHC244
VIH
HIGH-level
input voltage
VCC = 2.0 V
1.5
-
-
-
-
-
-
-
-
1.5
-
-
1.5
-
-
V
V
V
V
V
V
VCC = 3.0 V
2.1
2.1
2.1
VCC = 5.5 V
3.85
-
3.85
-
3.85
-
VIL
LOW-level
input voltage
VCC = 2.0 V
-
-
-
0.5
0.9
1.65
-
-
-
0.5
0.9
1.65
-
-
-
0.5
0.9
1.65
VCC = 3.0 V
VCC = 5.5 V
VOH
HIGH-level
VI = VIH or VIL
output voltage
IO = −50 µA; VCC = 2.0 V
IO = −50 µA; VCC = 3.0 V
IO = −50 µA; VCC = 4.5 V
IO = −4.0 mA; VCC = 3.0 V
IO = −8.0 mA; VCC = 4.5 V
VI = VIH or VIL
1.9
2.9
2.0
3.0
4.5
-
-
-
-
-
-
1.9
2.9
-
-
-
-
-
1.9
2.9
-
-
-
-
-
V
V
V
V
V
4.4
4.4
4.4
2.58
3.94
2.48
3.8
2.40
3.70
-
VOL
LOW-level
output voltage
IO = 50 µA; VCC = 2.0 V
IO = 50 µA; VCC = 3.0 V
IO = 50 µA; VCC = 4.5 V
IO = 4.0 mA; VCC = 3.0 V
IO = 8.0 mA; VCC = 4.5 V
VI = VIH or VIL;
-
-
-
-
-
-
0
0
0
-
0.1
0.1
-
-
-
-
-
-
0.1
0.1
-
-
-
-
-
-
0.1
0.1
V
V
0.1
0.1
0.1
V
0.36
0.36
±0.25
0.44
0.44
±2.5
0.55
0.55
±10.0
V
-
V
IOZ
OFF-state
-
µA
output current VO = VCC or GND;
CC = 5.5 V
V
II
input leakage VI = 5.5 V or GND;
current CC = 0 V to 5.5 V
-
-
-
-
0.1
4.0
-
-
1.0
40
-
-
©
2.0
80
µA
µA
V
ICC
supply current VI = VCC or GND; IO = 0 A;
CC = 5.5 V
V
74VHC_VHCT244_1
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 01 — 17 August 2009
5 of 16
74VHC244; 74VHCT244
Nexperia
Octal buffer/line driver; 3-state
Table 6.
Static characteristics …continued
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
25 °C
Min Typ Max
−40 °C to +85 °C −40 °C to +125 °C Unit
Min
Max
Min
Max
CI
input
capacitance
-
3.0
10
-
10
-
10
pF
pF
CO
output
-
4.0
-
-
-
-
-
capacitance
For type 74VHCT244
VIH
HIGH-level
input voltage
VCC = 4.5 V to 5.5 V
VCC = 4.5 V to 5.5 V
2.0
-
-
-
-
2.0
-
-
2.0
-
-
V
V
VIL
LOW-level
0.8
0.8
0.8
input voltage
VOH
HIGH-level
output voltage
VI = VIH or VIL; VCC = 4.5 V
IO = −50 µA
4.4
4.5
-
-
-
4.4
3.8
-
-
4.4
-
-
V
V
IO = −8.0 mA
3.94
3.70
VOL
LOW-level
output voltage
VI = VIH or VIL; VCC = 4.5 V
IO = 50 µA
-
-
-
0
-
0.1
0.36
±0.25
-
-
-
0.1
-
-
-
0.1
0.55
±10.0
V
IO = 8.0 mA
0.44
±2.5
V
IOZ
OFF-state
per input pin; VI = VIH or VIL;
-
µA
output current VCC = 5.5 V; IO = 0 A
VO = VCC or GND;
other pins at VCC or GND
II
input leakage VI = 5.5 V or GND;
-
-
-
-
-
-
0.1
4.0
-
-
-
1.0
40
-
-
-
2.0
80
µA
µA
mA
current
supply current VI = VCC or GND; IO = 0 A;
CC = 5.5 V
per input pin;
VCC = 0 V to 5.5 V
ICC
∆ICC
V
additional
1.35
1.5
1.5
supply current VI = VCC − 2.1 V; IO = 0 A;
other pins at VCC or GND;
V
CC = 4.5 V to 5.5 V
CI
input
capacitance
-
-
3
10
-
-
-
10
-
-
-
10
-
pF
pF
CO
output
4.0
capacitance
©
74VHC_VHCT244_1
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 01 — 17 August 2009
6 of 16
74VHC244; 74VHCT244
Nexperia
Octal buffer/line driver; 3-state
10. Dynamic characteristics
Table 7.
Dynamic characteristics
GND = 0 V. For test circuit see Figure 8.
Symbol Parameter Conditions
25 °C
−40 °C to +85 °C −40 °C to +125 °C Unit
Min Typ[1] Max Min
Max
Min
Max
For type 74VHC244
[2]
[2]
[2]
[3]
tpd
propagation nAn to nYn; see Figure 6
delay
VCC = 3.0 V to 3.6 V
CL = 15 pF
CL = 50 pF
-
-
5.0
8.4
1.0
1.0
10.0
13.5
1.0
1.0
10.5
15.0
ns
ns
7.0 11.9
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
3.4
5.0
5.5
7.5
1.0
1.0
6.5
8.5
1.0
1.0
7.0
9.5
ns
ns
CL = 50 pF
ten
enable time nOE to nYn; see Figure 7
VCC = 3.0 V to 3.6 V
CL = 15 pF
-
-
6.5 10.6
7.5 14.1
1.0
1.0
12.5
16.0
1.0
1.0
13.5
18.0
ns
ns
CL = 50 pF
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
-
4.0
5.5
7.3
9.3
1.0
1.0
8.5
1.0
1.0
9.5
ns
ns
CL = 50 pF
10.5
12.0
tdis
disable time nOE to nYn; see Figure 7
VCC = 3.0 V to 3.6 V
CL = 15 pF
-
-
5.5
9.7
1.0
1.0
11.0
16.0
1.0
1.0
12.5
17.5
ns
ns
CL = 50 pF
10.0 14.0
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
-
-
4.8
7.0
10
7.2
9.2
-
1.0
1.0
-
8.5
10.5
-
1.0
1.0
-
9.0
11.5
-
ns
ns
pF
CL = 50 pF
CPD
power
dissipation
capacitance
CL = 50 pF; fi = 1 MHz;
VI = GND to VCC
©
74VHC_VHCT244_1
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 01 — 17 August 2009
7 of 16
74VHC244; 74VHCT244
Nexperia
Octal buffer/line driver; 3-state
Table 7.
Dynamic characteristics …continued
GND = 0 V. For test circuit see Figure 8.
Symbol Parameter Conditions
25 °C
−40 °C to +85 °C −40 °C to +125 °C Unit
Min Typ[1] Max Min
Max
Min
Max
For type 74VHCT244
[2]
tpd
propagation nAn to nYn; see Figure 6
delay
VCC = 4.5 V to 5.5 V
CL = 15 pF
CL = 50 pF
-
-
3.5
5.0
7.4
8.4
1.0
1.0
8.5
9.5
1.0
1.0
9.5
ns
ns
10.5
ten
enable time nOE to nYn; see Figure 7
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
-
3.5 10.4
5.5 11.4
1.0
1.0
12.0
13.0
1.0
1.0
13.0
14.5
ns
ns
CL = 50 pF
[2]
[3]
tdis
disable time nOE to nYn; see Figure 7
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
-
-
5.0
7.0 11.4
12
9.4
1.0
1.0
-
10.0
13.0
-
1.0
1.0
-
12.0
14.5
-
ns
ns
pF
CL = 50 pF
CPD
power
per buffer;
-
dissipation
CL = 50 pF; f = 1 MHz;
capacitance VI = GND to VCC
[1] Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V).
[2] tpd is the same as tPLH and tPHL
ten is the same as tPZL and tPZH
tdis is the same as tPLZ and tPHZ
.
.
.
[3] CPD is used to determine the dynamic power dissipation PD (µW).
PD = CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in Volts.
11. Waveforms
V
I
nAn input
GND
V
M
V
M
t
t
PLH
PHL
V
OH
V
V
M
nYn output
M
V
OL
mna171
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 6. Propagation delay input (nAn) to output (nYn)
©
74VHC_VHCT244_1
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 01 — 17 August 2009
8 of 16
74VHC244; 74VHCT244
Nexperia
Octal buffer/line driver; 3-state
V
I
nOE input
V
M
GND
t
t
PZL
PLZ
V
CC
nYn output
LOW-to-OFF
OFF-to-LOW
V
M
V
X
V
OL
t
t
PZH
PHZ
V
OH
V
Y
nYn output
HIGH-to-OFF
OFF-to-HIGH
V
M
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. enable and disable times
Table 8.
Type
Measurement points
Input
VM
Output
VM
VX
VY
74VHC244
0.5VCC
1.5 V
0.5VCC
0.5VCC
VOL + 0.3 V
VOL + 0.3 V
V
OH − 0.3 V
OH − 0.3 V
74VHCT244
V
©
74VHC_VHCT244_1
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 01 — 17 August 2009
9 of 16
74VHC244; 74VHCT244
Nexperia
Octal buffer/line driver; 3-state
t
W
V
I
90 %
negative
pulse
V
V
V
M
M
10 %
0 V
t
t
r
f
t
t
f
r
V
I
90 %
positive
pulse
V
M
M
10 %
0 V
t
W
V
CC
V
CC
V
V
O
I
R
L
S1
G
open
DUT
R
T
C
L
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 resistor
S1 = Test selection switch
Fig 8. Load circuitry for switching times
Table 9.
Type
Test data
Input
Load
S1 position
tPHL, tPLH
open
VI
tr, tf
CL
RL
tPZH, tPHZ
GND
tPZL, tPLZ
VCC
74VHC244
VCC
3.0 V
3.0 ns
3.0 ns
15 pF, 50 pF
15 pF, 50 pF
1 kΩ
1 kΩ
74VHCT244
open
GND
VCC
©
74VHC_VHCT244_1
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 01 — 17 August 2009
10 of 16
74VHC244; 74VHCT244
Nexperia
Octal buffer/line driver; 3-state
12. Package outline
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
D
E
A
X
c
y
H
E
v
M
A
Z
20
11
Q
A
2
A
(A )
3
A
1
pin 1 index
θ
L
p
L
1
10
w
detail X
e
M
b
p
0
5
10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
A
max.
(1)
(1)
(1)
UNIT
mm
A
A
A
b
c
D
E
e
H
L
L
Q
v
w
y
θ
1
2
3
p
E
p
Z
0.3
0.1
2.45
2.25
0.49
0.36
0.32
0.23
13.0
12.6
7.6
7.4
10.65
10.00
1.1
0.4
1.1
1.0
0.9
0.4
2.65
0.1
0.25
0.01
1.27
0.05
1.4
0.25 0.25
0.1
8o
0o
0.012 0.096
0.004 0.089
0.019 0.013 0.51
0.014 0.009 0.49
0.30
0.29
0.419
0.394
0.043 0.043
0.016 0.039
0.035
0.016
inches
0.055
0.01 0.01 0.004
Note
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
JEITA
99-12-27
03-02-19
SOT163-1
075E04
MS-013
Fig 9. Package outline SOT163-1 (SO20)
74VHC_VHCT244_1
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 01 — 17 August 2009
11 of 16
74VHC244; 74VHCT244
Nexperia
Octal buffer/line driver; 3-state
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm
SOT360-1
D
E
A
X
c
H
v
M
A
y
E
Z
11
20
Q
A
2
(A )
3
A
A
1
pin 1 index
θ
L
p
L
1
10
detail X
w
M
b
p
e
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
A
(1)
(2)
(1)
UNIT
A
A
A
b
c
D
E
e
H
L
L
Q
v
w
y
Z
θ
1
2
3
p
E
p
max.
8o
0o
0.15
0.05
0.95
0.80
0.30
0.19
0.2
0.1
6.6
6.4
4.5
4.3
6.6
6.2
0.75
0.50
0.4
0.3
0.5
0.2
mm
1.1
0.65
0.25
1
0.2
0.13
0.1
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.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
JEITA
99-12-27
03-02-19
SOT360-1
MO-153
Fig 10. Package outline SOT360-1 (TSSOP20)
74VHC_VHCT244_1
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 01 — 17 August 2009
12 of 16
74VHC244; 74VHCT244
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
SOT764-1
B
A
D
A
A
1
E
c
detail X
terminal 1
index area
C
terminal 1
index area
e
1
y
y
e
b
v
M
C
C
A
B
C
1
w
M
2
9
L
1
10
E
h
e
20
11
19
12
D
h
X
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
(1)
A
(1)
(1)
UNIT
A
b
c
E
e
e
1
y
D
D
E
L
v
w
y
1
1
h
h
max.
0.05 0.30
0.00 0.18
4.6
4.4
3.15
2.85
2.6
2.4
1.15
0.85
0.5
0.3
mm
0.05
0.1
1
0.2
0.5
3.5
0.1
0.05
Note
1. Plastic or metal protrusions of 0.075 mm maximum per side are not included.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
JEITA
02-10-17
03-01-27
SOT764-1
- - -
MO-241
- - -
Fig 11. Package outline SOT764-1 (DHVQFN20)
©
74VHC_VHCT244_1
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 01 — 17 August 2009
13 of 16
74VHC244; 74VHCT244
Nexperia
Octal buffer/line driver; 3-state
13. Abbreviations
Table 10. Abbreviations
Acronym
CDM
CMOS
DUT
Description
Charge Device Model
Complementary Metal Oxide Semiconductor
Device Under Test
ESD
ElectroStatic Discharge
Human Body Model
HBM
MM
Machine Model
TTL
Transistor-Transistor Logic
14. Revision history
Table 11. Revision history
Document ID
Release date
20090817
Data sheet status
Change notice
Supersedes
74VHC_VHCT244_1
Product data sheet
-
-
©
74VHC_VHCT244_1
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 01 — 17 August 2009
14 of 16
74VHC244; 74VHCT244
Nexperia
Octal buffer/line driver; 3-state
15. Legal information
15.1 Data sheet status
Document status[1][2]
Product status[3]
Development
Definition
Objective [short] data sheet
This document contains data from the objective specification for product development.
This document contains data from the preliminary specification.
This document contains the product specification.
Preliminary [short] data sheet Qualification
Product [short] data sheet Production
[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 URL http://www.nexperia.com.
damage. Nexperia accepts no liability for inclusion and/or use of
Nexperia products in such equipment or applications and
15.2 Definitions
therefore such inclusion and/or use is at the customer’s own risk.
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.
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.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) may cause permanent
damage to the device. Limiting values are stress ratings only and operation of
the device at these or any other conditions above those given in the
Characteristics sections of this document is not implied. Exposure to limiting
values for extended periods may affect device reliability.
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.
Terms and conditions of sale — Nexperia products are sold
subject to the general terms and conditions of commercial sale, as published
at http://www.nexperia.com/profile/terms, including those pertaining to warranty,
intellectual property rights infringement and limitation of liability, unless
explicitly otherwise agreed to in writing by Nexperia. In case of
any inconsistency or conflict between information in this document and such
terms and conditions, the latter will prevail.
15.3 Disclaimers
General — Information in this document is believed to be accurate and
reliable.However,Nexperiadoesnotgiveanyrepresentationsor
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.
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.
Right to make changes — Nexperiareservestherighttomake
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.
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 national authorities.
Suitability for use — Nexperia products are not designed,
15.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
authorized or warranted to be suitable for use in medical, military, aircraft,
space or life support equipment, nor in applications where failure or
malfunction of a Nexperia product can reasonably be expected
to result in personal injury, death or severe property or environmental
16. Contact information
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
©
74VHC_VHCT244_1
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 01 — 17 August 2009
15 of 16
74VHC244; 74VHCT244
Nexperia
Octal buffer/line driver; 3-state
17. Contents
1
2
3
4
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Ordering information. . . . . . . . . . . . . . . . . . . . . 1
Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
5
5.1
5.2
Pinning information. . . . . . . . . . . . . . . . . . . . . . 3
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3
6
Functional description . . . . . . . . . . . . . . . . . . . 4
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 4
Recommended operating conditions. . . . . . . . 5
Static characteristics. . . . . . . . . . . . . . . . . . . . . 5
Dynamic characteristics . . . . . . . . . . . . . . . . . . 7
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 11
Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 14
Revision history. . . . . . . . . . . . . . . . . . . . . . . . 14
7
8
9
10
11
12
13
14
15
Legal information. . . . . . . . . . . . . . . . . . . . . . . 15
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 15
Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 15
15.1
15.2
15.3
15.4
16
17
Contact information. . . . . . . . . . . . . . . . . . . . . 15
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
© Nexperia B.V. 2017. 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: 17 August 2009
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