74LVC244AMN2TWG [ONSEMI]
Low-Voltage CMOS Octal Buffer;
| 型号： | 74LVC244AMN2TWG |
| 厂家： | 
ONSEMI |
| 描述： | Low-Voltage CMOS Octal Buffer 驱动 逻辑集成电路 |
| 文件： | 总10页 (文件大小：113K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
74LVC244A
Low-Voltage CMOS Octal
Buffer
With 5 V−Tolerant Inputs and Outputs
(3−State, Non−Inverting)
www.onsemi.com
The 74LVC244A is a high performance, non−inverting octal buffer
operating from a 1.2 to 3.6 V supply. High impedance TTL compatible
inputs significantly reduce current loading to input drivers while TTL
compatible outputs offer improved switching noise performance. A V
I
specification of 5.5 V allows 74LVC244A inputs to be safely driven
from 5 V devices. The 74LVC244A is suitable for memory address
driving and all TTL level bus oriented transceiver applications.
Current drive capability is 24 mA at the outputs. The Output Enable
(OE) input, when HIGH, disables the output by placing them in
a HIGH Z condition.
TSSOP−20
DT SUFFIX
CASE 948E
QFN20
MN SUFFIX
CASE 485AA
QFN20
MN SUFFIX
CASE 485CB
MARKING DIAGRAMS
Features
20
• Designed for 1.2 V to 3.6 V V Operation
• 5 V Tolerant − Interface Capability With 5 V TTL Logic
• Supports Live Insertion and Withdrawal
CC
LVC
244A
ALYW G
G
• I
Specification Guarantees High Impedance When V = 0 V
CC
OFF
1
• 24 mA Output Sink and Source Capability
• Near Zero Static Supply Current in All Three Logic States (10 mA)
Substantially Reduces System Power Requirements
• ESD Performance:
1
1
LVC
244A
ALYWG
G
244A
ALYWG
G
♦ Human Body Model >2000 V
♦ Machine Model >200 V
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
QFN20 − 485AA
QFN20 − 485CB
A
L
= Assembly Location
= Wafer Lot
Y
W
G
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information on page 7 of
this data sheet.
This document contains information on some products that are still under development.
ON Semiconductor reserves the right to change or discontinue these products without
notice.
© Semiconductor Components Industries, LLC, 2016
1
Publication Order Number:
February, 2016 − Rev. 1
74LVC244A/D
74LVC244A
1
V
2OE 1O0 2D0 1O1 2D1 1O2 2D2 1O3 2D3
19 18 17 16 15 14 12
CC
1OE
1D0
1D1
1D2
1D3
20
13
11
2
4
6
8
18
16
14
12
1O0
1O1
1O2
1O3
1
2
3
4
5
6
7
9
8
10
1OE 1D0 2O0 1D1 2O1 1D2 2O2 1D3 2O3 GND
19
12
11
10
20
19
2OE
2D0
2D1
2D2
2D3
QFN
PIN #1
17
3
5
7
9
2O0
2O1
2O2
2O3
2
9
15
13
11
Figure 1. Pinout: 20−Lead (Top View)
PIN NAMES
PINS
FUNCTION
Output Enable Inputs
Data Inputs
nOE
1Dn, 2Dn
1On, 2On
3−State Outputs
Figure 2. Logic Diagram
TRUTH TABLE
INPUTS
OUTPUTS
1On, 2On
1OE
2OE
1Dn
2Dn
L
L
L
H
X
L
H
Z
H
H = High Voltage Level
L = Low Voltage Level
Z = High Impedance State
X = High or Low Voltage Level and Transitions are Acceptable
For I reasons, DO NOT FLOAT Inputs
CC
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2
74LVC244A
MAXIMUM RATINGS
Symbol
Parameter
Condition
Value
Unit
V
V
CC
DC Supply Voltage
−0.5 to +6.5
V
I
DC Input Voltage
−0.5 ≤ V ≤ +6.5
V
I
V
O
DC Output Voltage
Output in 3−State
−0.5 ≤ V ≤ +6.5
V
O
Output in HIGH or LOW State
(Note 1)
−0.5 ≤ V ≤ V + 0.5
V
O
CC
I
DC Input Diode Current
DC Output Diode Current
V < GND
−50
mA
mA
mA
mA
mA
mA
°C
IK
I
I
V
O
< GND
−50
+50
50
OK
V
O
> V
CC
I
DC Output Source/Sink Current
DC Supply Current Per Supply Pin
DC Ground Current Per Ground Pin
Storage Temperature Range
O
I
100
100
CC
I
GND
T
−65 to +150
STG
T
L
Lead Temperature, 1 mm from Case for
10 Seconds
T = 260
L
°C
T
Junction Temperature Under Bias
Thermal Resistance (Note 2)
Moisture Sensitivity
T = 135
°C
J
J
q
110.7
°C/W
JA
MSL
Level 1
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. I absolute maximum rating must be observed.
O
2. Measured with minimum pad spacing on an FR4 board, using 10 mm−by−1 inch, 2 ounce copper trace no air flow.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Typ
Max
Units
V
CC
Supply Voltage
Operating
Functional
V
1.65
1.2
3.6
3.6
V
Input Voltage
0
5.5
V
V
I
V
O
Output Voltage
HIGH or LOW State
3−State
0
0
V
CC
5.5
I
HIGH Level Output Current
mA
mA
OH
V
CC
V
CC
= 3.0 V − 3.6 V
= 2.7 V − 3.0 V
−24
−12
I
LOW Level Output Current
OL
V
CC
V
CC
= 3.0 V − 3.6 V
= 2.7 V − 3.0 V
24
12
T
Operating Free−Air Temperature
Input Transition Rise or Fall Rate
−40
+125
°C
A
Dt/DV
ns/V
V
CC
V
CC
= 1.65 V to 2.7 V
= 2.7 V to 3.6 V
0
0
20
10
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
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3
74LVC244A
DC ELECTRICAL CHARACTERISTICS
−405C to +855C
−405C to +1255C
Typ
Typ
(Note 3)
(Note 3)
Min
Max
−
Min
Max
−
Symbol
Parameter
Conditions
= 1.2 V
Unit
VIH
HIGH−level input
voltage
V
1.08
−
−
1.08
−
−
V
CC
V
CC
= 1.65 V to 1.95 V
0.65 x
VCC
−
0.65 x
VCC
−
V
V
= 2.3 V to 2.7 V
= 2.7 V to 3.6 V
1.7
2.0
−
−
−
−
−
−
−
1.7
2.0
−
−
−
−
−
−
−
CC
CC
V
LOW−level input
voltage
V
CC
= 1.2 V
0.12
0.35 x
0.12
V
V
IL
V
CC
= 1.65 V to 1.95 V
−
−
0.35 x
VCC
V
CC
V
V
= 2.3 V to 2.7 V
= 2.7 V to 3.6 V
−
−
−
−
0.7
0.8
−
−
−
−
0.7
0.8
CC
CC
V
OH
HIGH−level output
voltage
V = V or V
I
IH
IL
I
= −100 mA;
V
−
−
−
V −
CC
−
−
O
CC
V
= 1.65 V to 3.6 V
0.2
1.2
1.8
2.2
2.4
2.2
0.3
CC
I
= −4 mA; V = 1.65 V
−
−
−
−
−
−
−
−
−
−
1.05
1.65
2.05
2.25
2.0
−
−
−
−
−
−
−
−
−
−
O
CC
I
= −8 mA; V = 2.3 V
CC
O
I
I
I
= −12 mA; V = 2.7 V
CC
O
O
O
= −18 mA; V = 3.0 V
CC
= −24 mA; V = 3.0 V
CC
VOL
LOW−level output
voltage
V = V or V
IL
V
I
IH
I
O
= 100 mA;
−
−
0.2
−
−
0.3
V
CC
= 1.65 V to 3.6 V
I
= 4 mA; V = 1.65 V
−
−
−
−
−
−
−
0.45
0.6
0.4
0.55
5
−
−
−
−
−
−
−
0.65
0.8
0.6
0.8
20
O
CC
I
= 8 mA; V = 2.3 V
−
−
O
CC
I
O
I
O
= 12 mA; V = 2.7 V
−
−
CC
= 24 mA; V = 3.0 V
−
−
CC
II
Input leakage current
V = 5.5V or GND V = 3.6 V
0.1
0.1
0.1
0.1
mA
mA
I
CC
I
OFF−state output
current
VI = VIH or VIL;
5
20
OZ
V
O
= 5.5 V or GND; V = 3.6 V
CC
I
Power−off leakage
current
V or V = 5.5 V; V = 0.0 V
−
−
−
0.1
0.1
5
10
10
−
−
−
0.1
0.1
5
20
40
mA
mA
mA
OFF
I
O
CC
I
Supply current
V = V or GND; I = 0 A;
I CC O
CC
V
CC
= 3.6 V
DI
Additional supply
current
per input pin;
V = V − 0.6 V; I = 0 A;
500
5000
CC
I
CC
O
V
CC
= 2.7 V to 3.6 V
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
3. All typical values are measured at T = 25°C and V = 3.3 V, unless stated otherwise.
A
CC
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4
74LVC244A
AC ELECTRICAL CHARACTERISTICS (t = t = 2.5 ns)
R
F
−405C to +855C
−405C to +1255C
Min
Typ1
17.0
6.4
3.4
3.4
2.9
24.0
7.0
3.9
4.1
3.2
9.0
4.5
3.6
3.3
3.1
−
Max
Min
Typ1
Max
Symbol
Parameter
Conditions
Unit
t
Propagation Delay (Note 5)
nDn to nOn
V
= 1.2 V
−
−
13.7
7.1
6.9
5.9
−
−
−
−
ns
pd
CC
V
= 1.65 V to 1.95 V
1.5
1.0
1.5
1.5
−
1.5
1.0
1.5
1.5
−
−
15.8
8.2
9.0
7.5
−
CC
V
= 2.3 V to 2.7 V
−
CC
V
CC
= 2.7 V
−
V
= 3.0 V to 3.6 V
= 1.2 V
−
CC
t
en
Enable Time (Note 6)
nOE to nOn
V
CC
−
ns
ns
ns
V
CC
= 1.65 V to 1.95 V
1.5
1.5
1.5
1.0
−
17.3
9.5
8.6
7.6
−
1.5
1.5
1.5
1.0
−
−
20.0
11.0
11.0
9.5
−
V
= 2.3 V to 2.7 V
−
CC
V
CC
= 2.7 V
−
V
= 3.0 V to 3.6 V
= 1.2 V
−
CC
t
dis
Disable Time (Note 7)
nOE to nOn
V
CC
−
V
CC
= 1.65 V to 1.95 V
2.2
0.5
1.5
1.5
−
9.8
5.5
6.8
5.8
1
2.2
0.5
1.5
1.5
−
−
11.3
6.4
8.5
7.5
1.5
V
= 2.3 V to 2.7 V
−
CC
V
CC
= 2.7 V
−
V
= 3.0 V to 3.6 V
−
CC
t
Output Skew Time (Note 8)
−
sk(0)
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
4. Typical values are measured at TA = 25°C and VCC = 3.3 V, unless stated otherwise.
5. t is the same as t
and t
.
pd
PLH
PHL
6. t is the same as t
and t
.
en
PZL
PZH
7. t is the same as t
and t
.
dis
PLZ
PHZ
8. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.
DYNAMIC SWITCHING CHARACTERISTICS
T
A
= +25°C
Min
Typ
Max
Symbol
Characteristic
Condition
= 3.3 V, C = 50 pF, V = 3.3 V, V = 0 V
Unit
V
OLP
Dynamic LOW Peak Voltage (Note 9)
V
CC
V
CC
0.8
0.6
V
L
IH
IL
= 2.5 V, C = 30 pF, V = 2.5 V, V = 0 V
L
IH
IL
V
OLV
Dynamic LOW Valley Voltage (Note 9)
V
CC
V
CC
= 3.3 V, C = 50 pF, V = 3.3 V, V = 0 V
−0.8
−0.6
V
L
IH
IL
= 2.5 V, C = 30 pF, V = 2.5 V, V = 0 V
L
IH
IL
9. Number of outputs defined as “n”. Measured with “n−1” outputs switching from HIGH−to−LOW or LOW−to−HIGH. The remaining output is
measured in the LOW state.
CAPACITIVE CHARACTERISTICS
Symbol
CIN
Parameter
Input Capacitance
Condition
= 3.3 V, V = 0 V or V
Typical
Unit
pF
V
V
4
5
CC
I
CC
CC
COUT
CPD
Output Capacitance
= 3.3 V, V = 0 V or V
pF
CC
I
Power Dissipation Capacitance
(Note 10)
Per input; V = GND or V
pF
I
CC
V
= 1.65 V to 1.95 V
6.4
9.6
CC
V
CC
V
CC
= 2.3 V to 2.7 V
= 3.0 V to 3.6 V
12.5
10.C is used to determine the dynamic power dissipation (P in mW).
PD
D
2
2
P
= C x V
x fi x N + S (C x V
x fo) where:
D
PD
CC
L
CC
fi = input frequency in MHz; fo = output frequency in MHz
C = output load capacitance in pF V = supply voltage in Volts
L
CC
N = number of outputs switching
2
S(C x V
x fo) = sum of the outputs.
L
CC
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5
74LVC244A
V
CC
Vmi
Vmi
1Dn, 2Dn
1On, 2On
0 V
t
t
PHL
PLH
V
OH
OL
Vmo
Vmo
V
WAVEFORM 1 − PROPAGATION DELAYS
= t = 2.5 ns, 10% to 90%; f = 1 MHz; t = 500 ns
t
R
F
W
V
CC
Vmi
Vmi
1OE, 2OE
1On, 2On
0 V
t
t
PHZ
PZH
V
V
CC
- 0.3 V
OH
Vmo
Vmo
≈ 0 V
t
t
PLZ
PZL
≈ 3.0 V
1On, 2On
V + 0.3 V
OL
GND
WAVEFORM 2 − OUTPUT ENABLE AND DISABLE TIMES
t
R
= t = 2.5 ns, 10% to 90%; f = 1 MHz; t = 500 ns
F
W
Figure 3. AC Waveforms
V
CC
Symbol 3.3 V 0.3 V
2.7 V
1.5 V
1.5 V
V
CC
< 2.7 V
Vmi
1.5 V
1.5 V
V
CC
/2
/2
Vmo
V
CC
V
V
+ 0.3 V
− 0.3 V
V
+ 0.3 V
V
OL
+ 0.15 V
− 015 V
HZ
OL
OL
V
V
OH
V
OH
− 0.3 V
V
OH
LZ
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6
74LVC244A
V
CC
V
EXT
V
I
V
O
OPEN
GND
R
1
PULSE
GENERATOR
DUT
R
T
C
R
L
L
C includes jig and probe capacitance
L
R = Z
T
of pulse generator (typically 50 W)
OUT
R = R
1
L
Supply Voltage
Input
Load
V
EXT
V
CC
(V)
V
I
t , t
C
R
t
, t
t
, t
t
, t
r
f
L
L
PLH PHL
PLZ PZL
PHZ PZH
1.2
V
V
V
≤ 2 ns
≤ 2 ns
30 pF
30 pF
30 pF
50 pF
50 pF
1 kW
1 kW
Open
Open
Open
Open
Open
2 x V
GND
CC
CC
CC
CC
1.65 − 1.95
2.3 − 2.7
2.7
2 x V
GND
GND
GND
GND
CC
≤ 2 ns
500 W
500 W
500 W
2 x V
CC
2.7 V
2.7 V
≤ 2.5 ns
≤ 2.5 ns
2 x V
CC
3 − 3.6
2 x V
CC
Figure 4. Test Circuit
ORDERING INFORMATION
Device
†
Package
Shipping
74LVC244ADTR2G
TSSOP−20
(Pb−Free)
2500 / Tape & Reel
3000 / Tape & Reel
3000 / Tape & Reel
74LVC244AMN2TWG
(In Development)
QFN20, 2.5x3.5
(Pb−Free)
74LVC244AMNTWG
(In Development)
QFN20, 2.5x4.5
(Pb−Free)
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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7
74LVC244A
PACKAGE DIMENSIONS
TSSOP−20
CASE 948E−02
ISSUE C
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION:
MILLIMETER.
20X K REF
K
M
S
S
V
0.10 (0.004)
T U
S
K1
0.15 (0.006) T U
3. DIMENSION A DOES NOT INCLUDE
MOLD FLASH, PROTRUSIONS OR GATE
BURRS. MOLD FLASH OR GATE BURRS
SHALL NOT EXCEED 0.15 (0.006) PER SIDE.
4. DIMENSION B DOES NOT INCLUDE
INTERLEAD FLASH OR PROTRUSION.
INTERLEAD FLASH OR PROTRUSION
SHALL NOT EXCEED 0.25 (0.010) PER SIDE.
5. DIMENSION K DOES NOT INCLUDE
DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.08
(0.003) TOTAL IN EXCESS OF THE K
DIMENSION AT MAXIMUM MATERIAL
CONDITION.
J J1
20
11
2X L/2
B
SECTION N−N
L
−U−
PIN 1
IDENT
0.25 (0.010)
N
1
10
M
6. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
7. DIMENSION A AND B ARE TO BE
S
0.15 (0.006) T U
DETERMINED AT DATUM PLANE −W−.
A
−V−
N
MILLIMETERS
DIM MIN MAX
INCHES
MIN
MAX
0.260
0.177
0.047
0.006
0.030
F
A
B
6.40
4.30
---
6.60 0.252
4.50 0.169
DETAIL E
C
1.20
---
D
0.05
0.50
0.15 0.002
0.75 0.020
F
G
H
0.65 BSC
0.026 BSC
−W−
0.27
0.09
0.09
0.19
0.19
0.37
0.011
0.015
0.008
0.006
0.012
0.010
C
J
0.20 0.004
0.16 0.004
0.30 0.007
0.25 0.007
J1
K
G
D
H
K1
L
DETAIL E
6.40 BSC
0.252 BSC
0
0.100 (0.004)
−T− SEATING
M
0
8
8
_
_
_
_
PLANE
SOLDERING FOOTPRINT*
7.06
1
0.65
PITCH
16X
0.36
16X
1.26
DIMENSIONS: MILLIMETERS
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
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8
74LVC244A
PACKAGE DIMENSIONS
QFN20, 2.5x4.5 MM
CASE 485AA
ISSUE B
NOTES:
D
A
B
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. DIMENSIONS b APPLIES TO PLATED
TERMINAL AND IS MEASURED BETWEEN
0.25 AND 0.30 MM FROM TERMINAL.
4. COPLANARITY APPLIES TO THE EXPOSED
PAD AS WELL AS THE TERMINALS.
PIN ONE REFERENCE
MILLIMETERS
DIM MIN
MAX
1.00
0.05
A
A1
A3
b
0.80
0.00
E
0.20 REF
0.20
0.30
1.15
D
2.50 BSC
D2
E
0.85
2.85
2X
4.50 BSC
0.15
C
0.15
C
E2
e
3.15
0.50 BSC
2X
K
0.20
0.35
---
0.45
L
C
TOP VIEW
SIDE VIEW
0.10
0.08
A
C
20X
(A3)
SEATING
PLANE
A1
C
D2
e
11
20X L
9
12
e
E2
20X
b
20X
19
2
0.10 C A B
0.05
1
20
C
K
NOTE 3
BOTTOM VIEW
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9
74LVC244A
PACKAGE DIMENSIONS
QFN20, 2.5x3.5, 0.4P
CASE 485CB
ISSUE O
NOTES:
A
B
D
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
L
L
2. CONTROLLING DIMENSION: MILLIMETERS.
3. DIMENSIONS b APPLIES TO PLATED
TERMINAL AND IS MEASURED BETWEEN
0.15 AND 0.30 MM FROM TERMINAL TIP.
4. COPLANARITY APPLIES TO THE EXPOSED
PAD AS WELL AS THE TERMINALS.
PIN ONE
REFERENCE
L1
DETAIL A
ALTERNATE TERMINAL
CONSTRUCTIONS
MILLIMETERS
DIM MIN
MAX
1.00
0.05
E
A
A1
A3
b
0.80
0.00
0.20 REF
EXPOSED Cu
MOLD CMPD
0.15
0.25
1.10
0.15
C
2X
D
2.50 BSC
D2
E
0.90
3.50 BSC
2X
0.15
C
E2
e
2.00
2.20
TOP VIEW
DETAIL B
0.40 BSC
ALTERNATE
L
L1
0.35
---
0.45
0.15
A
CONSTRUCTIONS
DETAIL B
(A3)
A1
0.10
0.08
C
C
NOTE 4
SEATING
PLANE
C
SIDE VIEW
D2
SOLDERING FOOTPRINT*
3.80
2.24
0.10 C A B
PACKAGE
OUTLINE
20X
L
9
12
0.10 C A B
DETAIL A
20X
0.63
2.80 1.14
E2
1
20X
b
20X
0.25
0.40
PITCH
0.10 C A B
0.05
2
19
1
C
NOTE 3
DIMENSIONS: MILLIMETERS
e
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
e/2
BOTTOM VIEW
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74LVC244A/D
相关型号：
74LVC244APW/T3
IC LVC/LCX/Z SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDSO20, 4.40 MM, PLASTIC, MO-153, SOT-360-1, TSSOP-20, Bus Driver/Transceiver
NXP
74LVC244AQ20-13
Bus Driver, LVC/LCX/Z Series, 2-Func, 4-Bit, True Output, CMOS, 2.50 X 4.50 MM, 0.95 MM HEIGHT, 0.50 MM PITCH, GREEN, VQFN-20
DIODES
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