74AHC244BQ-G [NXP]
IC,BUFFER/DRIVER,DUAL,4-BIT,AHC/VHC-CMOS,LLCC,20PIN,PLASTIC;
| 型号： | 74AHC244BQ-G |
| 厂家： | 
NXP |
| 描述： | IC,BUFFER/DRIVER,DUAL,4-BIT,AHC/VHC-CMOS,LLCC,20PIN,PLASTIC 驱动 逻辑集成电路 |
| 文件： | 总16页 (文件大小：96K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
74AHC244; 74AHCT244
Octal buffer/line driver; 3-state
Rev. 05 — 20 December 2007
Product data sheet
1. General description
The 74AHC244; 74AHCT244 is a high-speed Si-gate CMOS device.
The 74AHC244; 74AHCT244 has 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
■ Balanced propagation delays
■ All inputs have a Schmitt-trigger action
■ Inputs accepts voltages higher than VCC
■ For 74AHC244 only: operates with CMOS input levels
■ For 74AHCT244 only: operates with TTL input levels
■ ESD protection:
◆ HBM JESD22-A114E exceeds 2000 V
◆ MM JESD22-A115-A exceeds 200 V
◆ CDM JESD22-C101C exceeds 1000 V
■ Multiple package options
■ 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
74AHC244D
SO20
plastic small outline package; 20 leads;
body width 7.5 mm
SOT163-1
74AHCT244D
74AHC244PW
74AHCT244PW
74AHC244BQ
74AHCT244BQ
−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
74AHC244; 74AHCT244
NXP Semiconductors
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
EN
2
4
6
17
15
13
18
16
14
12
3
18
2
1A0
1A1
1A2
1Y0
1Y1
1Y2
1Y3
2A0
2A1
2A2
2Y0
2Y1
2Y2
2Y3
16
14
12
4
6
8
5
7
9
19
11
EN
8
1
11
19
1A3
2A3
9
7
5
3
13
15
17
1OE
2OE
mna874
mna873
Fig 2. Logic symbol
Fig 3. IEC logic symbol
74AHC_AHCT244_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 20 December 2007
2 of 16
74AHC244; 74AHCT244
NXP Semiconductors
Octal buffer/line driver; 3-state
5. Pinning information
5.1 Pinning
74AHC244
74AHCT244
terminal 1
index area
74AHC244
74AHCT244
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
001aah079
10
001aae258
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
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
74AHC_AHCT244_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 20 December 2007
3 of 16
74AHC244; 74AHCT244
NXP Semiconductors
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.
74AHC_AHCT244_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 20 December 2007
4 of 16
74AHC244; 74AHCT244
NXP Semiconductors
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
74AHC244
74AHCT244
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 74AHC244
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
74AHC_AHCT244_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 20 December 2007
5 of 16
74AHC244; 74AHCT244
NXP Semiconductors
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 74AHCT244
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
74AHC_AHCT244_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 20 December 2007
6 of 16
74AHC244; 74AHCT244
NXP Semiconductors
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 74AHC244
[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
74AHC_AHCT244_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 20 December 2007
7 of 16
74AHC244; 74AHCT244
NXP Semiconductors
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 74AHCT244
[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)
74AHC_AHCT244_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 20 December 2007
8 of 16
74AHC244; 74AHCT244
NXP Semiconductors
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
74AHC244
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
74AHCT244
V
74AHC_AHCT244_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 20 December 2007
9 of 16
74AHC244; 74AHCT244
NXP Semiconductors
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
V
CC
CC
V
V
O
I
R
L
S1
PULSE
GENERATOR
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
74AHC244
VCC
3.0 V
3.0 ns
3.0 ns
15 pF, 50 pF
15 pF, 50 pF
1 kΩ
1 kΩ
74AHCT244
open
GND
VCC
74AHC_AHCT244_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 20 December 2007
10 of 16
74AHC244; 74AHCT244
NXP Semiconductors
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
0.01
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 0.004
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)
74AHC_AHCT244_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 20 December 2007
11 of 16
74AHC244; 74AHCT244
NXP Semiconductors
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)
74AHC_AHCT244_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 20 December 2007
12 of 16
74AHC244; 74AHCT244
NXP Semiconductors
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)
74AHC_AHCT244_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 20 December 2007
13 of 16
74AHC244; 74AHCT244
NXP Semiconductors
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
20071220
Data sheet status
Change notice
Supersedes
74AHC_AHCT244_5
Modifications:
Product data sheet
-
74AHC_AHCT244_4
• 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.
• Section 3: DHVQFN20 package added.
• Section 7: derating values added for DHVQFN20 package.
• Section 12: outline drawing added for DHVQFN20 package.
74AHC_AHCT244_4
74AHC_AHCT244_3
74AHC_AHCT244_2
74AHC_AHCT244_1
20060210
19990928
19990224
19980921
Product data sheet
Product specification
Product specification
Product specification
-
-
-
-
74AHC_AHCT244_3
74AHC_AHCT244_2
74AHC_AHCT244_1
-
74AHC_AHCT244_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 20 December 2007
14 of 16
74AHC244; 74AHCT244
NXP Semiconductors
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.nxp.com.
malfunction of an NXP Semiconductors product can reasonably be expected
15.2 Definitions
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors accepts no liability for inclusion and/or use of
NXP Semiconductors products in such equipment or applications and
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. NXP Semiconductors 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. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
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 NXP Semiconductors sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
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.
Terms and conditions of sale — NXP Semiconductors products are sold
subject to the general terms and conditions of commercial sale, as published
at http://www.nxp.com/profile/terms, including those pertaining to warranty,
intellectual property rights infringement and limitation of liability, unless
explicitly otherwise agreed to in writing by NXP Semiconductors. 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, NXP Semiconductors 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.
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 — NXP Semiconductors 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.
15.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
Suitability for use — NXP Semiconductors products are not designed,
authorized or warranted to be suitable for use in medical, military, aircraft,
space or life support equipment, nor in applications where failure or
16. Contact information
For additional information, please visit: http://www.nxp.com
For sales office addresses, send an email to: salesaddresses@nxp.com
74AHC_AHCT244_5
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 20 December 2007
15 of 16
74AHC244; 74AHCT244
NXP Semiconductors
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
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2007.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 20 December 2007
Document identifier: 74AHC_AHCT244_5
相关型号：
74AHC244D-T
AHC/VHC/H/U/V SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDSO20, 7.50 MM, PLASTIC, MS-013, SOT163-1, SOP-20
NXP
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