74LVC244AD [NXP]
Octal buffer/line driver with 5-volt tolerant inputs/outputs 3-Statetitle; 5伏容限输入/输出3 Statetitle八路缓冲器/线路驱动器
| 型号： | 74LVC244AD |
| 厂家： | 
NXP |
| 描述： | Octal buffer/line driver with 5-volt tolerant inputs/outputs 3-Statetitle |
| 文件： | 总10页 (文件大小：100K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
74LVC244A/74LVCH244A
Octal buffer/line driver with 5-volt tolerant
inputs/outputs (3-State)title
Product specification
1998 May 20
Supersedes data of 1996 Sep 06
IC24 Data Handbook
Philips
Semiconductors
Philips Semiconductors
Product specification
Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)
74LVC244A
74LVCH244A
FEATURES
DESCRIPTION
The 74LVC244A/74LVCH244A is a high-performance, low-power,
low-voltage, Si-gate CMOS device, superior to most advanced
CMOS compatible TTL families.
• 5-volt tolerant inputs/outputs, for interfacing with 5-volt logic
• Supply voltage range of 2.7V to 3.6V
• Complies with JEDEC standard no. 8-1A
• CMOS low power consumption
Inputs can be driven from either 3.3V or 5V devices. In 3-State
operation, outputs can handle 5V. These features allow the use of
these devices as translators in a mixed 3.3V/5V environment.
• Direct interface with TTL levels
The 74LVC244A/74LVCH244A is an octal non-inverting buffer/line
driver with 3-State outputs. The 3-State outputs are controlled by the
output enable inputs 1OE and 2OE. A HIGH on nOE causes the
outputs to assume a high impedance OFF-state. Schmitt-trigger
action at all inputs makes the circuit highly tolerant for slower input
rise and fall times.
• High impedance when V = 0V
CC
• Bushold on all data inputs (74LVCH244A only)
The ’244’ is functionally identical to the ’240’, but the ’240’ has
non-inverting outputs.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
Propagation delay
C = 50pF
L
1A to 1Y
V
CC
= 3.3V
t
/t
3.5
ns
n
n;
n
PHL PLH
2A to 2Y
n
C
C
Input capacitance
4.4
pF
pF
I
Power dissipation capacitance per
buffer
Notes 1 and 2
22.6
PD
NOTE:
1. C is used to determine the dynamic power dissipation (P in mW):
PD
D
2
2
P
= C x V
x f + S (C x V
x f ) where:
D
PD
CC
i
L
CC o
f = input frequency in MHz; C = output load capacity in pF;
i
L
f = output frequency in MHz; V = supply voltage in V;
o
CC
2
S (C x V
x f ) = sum of outputs.
L
CC
o
2. The condition is V = GND to V
I
CC
ORDERING INFORMATION
TEMPERATURE
RANGE
OUTSIDE
NORTH AMERICA
PACKAGES
NORTH AMERICA
PKG. DWG. #
20-Pin Plastic Shrink Small Outline (SO)
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
74LVC244A D
74LVC244A DB
74LVC244A PW
74LVCH244A D
74LVCH244A DB
74LVCH244A PW
74LVC244A D
74LVC244A DB
7LVC244APW DH
74LVCH244A D
74LVCH244A DB
LVCH244APW DH
SOT163-1
SOT339-1
SOT360-1
SOT163-1
SOT339-1
SOT360-1
20-Pin Plastic Shrink Small Outline (SSOP) Type II
20-Pin Plastic Thin Shrink Small Outline (TSSOP) Type I
20-Pin Plastic Shrink Small Outline (SO)
20-Pin Plastic Shrink Small Outline (SSOP) Type II
20-Pin Plastic Thin Shrink Small Outline (TSSOP) Type I
2
1998 May 20
853-1876 19419
Philips Semiconductors
Product specification
74LVC244A
74LVCH244A
Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)
PIN DESCRIPTION
FUNCTION TABLE
INPUTS
OUTPUT
PIN NUMBER SYMBOL
FUNCTION
nOE
L
nA
L
nY
L
n
n
1
1OE
1A to 1A
Output enable input (active LOW)
Data inputs
2, 4, 6, 8
3, 5, 7, 9
0
‘3
2Y to 2Y
0
Bus outputs
L
H
H
Z
3
10
GND
Ground (0V)
H
X
17, 15, 13, 11 2A to 2A
Bus inputs
H
L
X
Z
= HIGH voltage level
= LOW voltage level
= Don’t care
0
3
18, 16, 14, 12 1Y to 1Y
Bus outputs
0
3
19
20
2OE
Output enable input (active-LOW)
Positive supply voltage
= High impedance OFF-state
V
CC
LOGIC SYMBOL
PIN CONFIGURATION
3
5
7
9
17
15
13
11
19
18
16
14
12
2
2A
2A
2A
2A
2Y
o
0
1
2
3
1A
1A
1A
1A
1Y
1Y
1Y
1Y
0
1
2
3
0
1
2
3
4
6
8
1
2Y
2Y
2Y
1
2
3
20
V
1OE
1A0
2Y0
1A1
2Y1
1A2
2Y2
1A3
2Y3
1
2
3
4
5
6
7
8
9
CC
19 2OE
18 1Y0
17 2A0
16 1Y1
15 2A1
14 1Y2
13 2A2
12 1Y3
2OE
1OE
SV00210
FUNCTIONAL DIAGRAM
GND 10
11
2A3
1A
1Y
18
0
0
1
2
3
2
4
6
8
1
SV00212
1A
1A
1A
1Y 16
1
LOGIC SYMBOL (IEEE/IEC)
14
1Y
2
12
1Y
3
1
EN
1OE
2A
2
4
6
8
18
2Y
3
5
7
9
0
17
15
13
11
19
o
16
14
12
2A
2A
2A
2Y
2Y
2Y
1
2
3
1
2
3
19
EN
11
13
15
17
9
2OE
7
5
3
SV00211
SV00209
3
1998 May 20
Philips Semiconductors
Product specification
74LVC244A
74LVCH244A
Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
PARAMETER
CONDITIONS
UNIT
MAX
MIN
2.7
1.2
0
DC supply voltage (for max. speed performance)
DC supply voltage (for low-voltage applications)
DC Input voltage range
3.6
V
CC
V
3.6
V
I
5.5
V
V
DC Output voltage range; output HIGH or LOW
state
0
V
CC
V
O
DC output voltage range; output 3-State
0
5.5
T
amb
Operating ambient temperature range in free-air
–40
+85
°C
V
CC
V
CC
= 1.2 to 2.7V
= 2.7 to 3.6V
0
0
20
10
t , t
r
Input rise and fall times
ns/V
f
1
ABSOLUTE MAXIMUM RATINGS
In accordance with the Absolute Maximum Rating System (IEC 134)
Voltages are referenced to GND (ground = 0V)
SYMBOL
PARAMETER
DC supply voltage
CONDITIONS
RATING
UNIT
V
V
CC
I
IK
–0.5 to +6.5
–50
DC input diode current
V t0
mA
V
I
V
I
DC input voltage
Note 2
uV or V t 0
–0.5 to +6.5
"50
I
DC output diode current
V
O
mA
OK
CC
O
DC output voltage; output HIGH or LOW state
DC output voltage; output 3-State
DC output source or sink current
Note 2
Note 2
–0.5 to V +0.5
CC
V
V
O
–0.5 to 6.5
"50
I
O
V
O
= 0 to V
CC
mA
mA
°C
I
, I
DC V or GND current
"100
GND CC
CC
T
stg
Storage temperature range
–65 to +150
Power dissipation per package
– plastic mini-pack (SO)
– plastic shrink mini-pack (SSOP and TSSOP)
P
TOT
above +70°C derate linearly with 8 mW/K
above +60°C derate linearly with 5.5 mW/K
500
500
mW
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
4
1998 May 20
Philips Semiconductors
Product specification
74LVC244A
74LVCH244A
Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions voltages are referenced to GND (ground = 0V)
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
Temp = -40°C to +85°C
UNIT
1
MIN
TYP
MAX
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= 1.2V
V
CC
V
HIGH level Input voltage
LOW level Input voltage
V
V
IH
= 2.7 to 3.6V
= 1.2V
2.0
GND
0.8
V
IL
= 2.7 to 3.6V
= 2.7V; V = V or V ; I = –12mA
V
V
V
V
*0.5
I
IH
IL
O
CC
CC
CC
CC
= 3.0V; V = V or V ; I = –100µA
*0.2
*0.6
*0.8
V
CC
I
IH
IL
O
O
O
V
OH
HIGH level output voltage
LOW level output voltage
V
= 3.0V; V = V or V
I
I
= –18mA
= –24mA
I
IH
IL;
IL;
= 3.0V; V = V or V
I
IH
= 2.7V; V = V or V ; I = 12mA
0.40
0.20
0.55
"5
I
IH
IL
O
= 3.0V; V = V or V ; I = 100µA
GND
V
OL
V
I
IH
IL
O
O
= 3.0V; V = V or V
I
= 24mA
I
IH
IL;
I
Input leakage current
= 3.6V; V = 5.5V or GND
"0.1
0.1
µA
µA
µA
µA
I
I
I
3-State output OFF-state current
Power off leakage supply
Quiescent supply current
= 3.6V; V = V or V ; V = 5.5V or GND
"5
OZ
I
IH
IL
O
I
off
= 0.0V; V or V = 5.5V
0.1
"10
10
I
O
I
= 3.6V; V = V or GND; I = 0
0.1
CC
I
CC
O
Additional quiescent supply current
per input pin
∆I
V
CC
V
CC
V
CC
= 2.7V to 3.6V; V = V –0.6V; I = 0
5
–
–
500
–
µA
µA
µA
CC
BHL
BHH
I
CC
O
Bushold LOW sustaining
I
= 3.0V; V =0.8V
75
I
2, 3, 4
current
Bushold HIGH sustaining
I
= 3.0V; V =2.0V
–75
–
I
2, 3, 4
current
, 3, 5
I
Bushold LOW overdrive current2
Bushold HIGH overdrive current2
V
V
= 3.6V
= 3.6V
500
–
–
–
–
µA
µA
BHLO
CC
, 3, 5
I
–500
BHHO
CC
NOTES:
1. All typical values are at V = 3.3V and T
= 25°C.
amb
CC
2. Valid for data inputs of bushold parts (LVCH-A) only.
3. For data inputs only, control inputs do not have a bushold circuit
4. The specified sustaining current at the data inputs do not have a bushold circuit.
5. The specified overdrive current at the data input forces the data input to the opposite logic input state.
6. For bushold parts, the bushold circuit is switched off when V exceeds V allowing 5.5V on the input terminal.
I
CC
5
1998 May 20
Philips Semiconductors
Product specification
74LVC244A
74LVCH244A
Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)
AC CHARACTERISTICS
GND = 0V; t = t v 2.5ns; C = 50pF; R = 500Ω; T
= –40°C to +85°C.
r
f
L
L
amb
LIMITS
SYMBOL
PARAMETER
WAVEFORM
V
CC
= 3.3V ±0.3V
V
CC
= 2.7V
V = 1.2V
CC
UNIT
1
MIN
TYP
MAX
MIN
MAX
TYP
Propagation delay
1A to 1Y ;
2A to 2Y
n
t
t
PHL
PLH
1, 3
2, 3
2, 3
1.5
1.5
1.5
3.5
5.9
7.6
5.8
1.5
6.9
8.6
6.8
16.0
19.0
17.0
ns
ns
ns
n
n
n
3-State output enable time
t
PZH
1OE to 1Y ;
4.3
3.7
1.5
1.5
n
t
PZL
2OE to 2Y
n
3-State output disable time
t
PHZ
1OE to 1Y ;
n
t
PLZ
2OE to 2Y
n
NOTE:
1. Unless otherwise stated, all typical values are at V = 3.3V and T
= 25°C.
CC
amb
AC WAVEFORMS
TEST CIRCUIT
V
V
= 1.5 V at V w 2.7 V; V = 0.5 V at V < 2.7 V
M
CC M CC CC
and V are the typical output voltage drop that occur with the
S
1
OL
OH
V
CC
2<V
CC
Open
output load.
GND
V
X
V
Y
= V + 0.3V at V ≥ 2.7V; V = V + 0.1 V at V < 2.7V
OL CC X OL CC CC
R =500 Ω
= V – 0.3V at V ≥ 2.7V; V = V – 0.1 V at V < 2.7V
L
OH
CC
Y
OH
CC
CC
V
V
OUT
IN
PULSE
GENERATOR
V
I
D.U.T.
INPUT
GND
V
M
R =500 Ω
L
R
C
T
L
t
t
PLH
PHL
V
OH
Test Circuit for 3-State Outputs
SWITCH POSITION
OUTPUT
V
M
V
V
IN
TEST
SWITCH
Open
CC
V
OL
t 2.7V
2.7 – 3.6V 2.7V
V
CC
t
/t
PLH PHL
SY00041
t
/t
2<V
CC
PLZ PZL
Waveform 1. Input (D ) to output (Qn) propagation delays.
n
t
/t
GND
PHZ PZH
DEFINITIONS
R = Load resistor
V
I
L
C = Load capacitance includes jig and probe capacitance
V
nOE INPUT
GND
L
M
R = Termination resistance should be equal to Z
T
OUT
of pulse generators.
SW00047
Waveform 3. Load circuitry for switching times.
t
t
PZL
PLZ
V
CC
Q
n
OUTPUT
LOW-to-OFF
OFF-to-LOW
V
M
V
X
V
OL
t
t
PZH
PHZ
V
OH
Q
n
OUTPUT
V
Y
HIGH-to-OFF
OFF-to-HIGH
V
M
GND
outputs
enabled
outputs
enabled
outputs
disabled
SW00207
Waveform 2. 3-State enable and disable times.
6
1998 May 20
Philips Semiconductors
Product specification
Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)
74LVC244A
74LVCH244A
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
7
1998 May 20
Philips Semiconductors
Product specification
Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)
74LVC244A
74LVCH244A
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
SOT339-1
8
1998 May 20
Philips Semiconductors
Product specification
Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)
74LVC244A
74LVCH244A
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm
SOT360-1
9
1998 May 20
Philips Semiconductors
Product specification
Octal buffer/line driver with 5-volt
tolerant inputs/outputs (3-State)
74LVC244A
74LVCH244A
Data sheet status
[1]
Data sheet
status
Product
status
Definition
Objective
specification
Development
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
Preliminary
specification
Qualification
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make chages at any time without notice in order to
improve design and supply the best possible product.
Product
specification
Production
This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Righttomakechanges—PhilipsSemiconductorsreservestherighttomakechanges, withoutnotice, intheproducts, includingcircuits,standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
Sunnyvale, California 94088–3409
Telephone 800-234-7381
print code
Date of release: 05-96
9397-750-04502
Document order number:
Philips
Semiconductors
相关型号：
74LVC244ADB-T
IC LVC/LCX/Z SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDSO20, 5.30 MM, PLASTIC, MO-150, SOT339-1, SSOP-20, Bus Driver/Transceiver
NXP
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