MC74LCX245DWG [ONSEMI]
Low-Voltage CMOS Octal Transceiver With 5 V−Tolerant Inputs and Outputs (3−State, Inverting); 低电压CMOS八路收发器可承受5V电压输入和输出（三态，反相）
| 型号： | MC74LCX245DWG |
| 厂家： | 
ONSEMI |
| 描述： | Low-Voltage CMOS Octal Transceiver With 5 V−Tolerant Inputs and Outputs (3−State, Inverting) |
| 文件： | 总8页 (文件大小：92K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MC74LCX245
Low−Voltage CMOS Octal
Transceiver
With 5 V−Tolerant Inputs and Outputs
(3−State, Inverting)
http://onsemi.com
MARKING
The MC74LCX245 is a high performance, non−inverting octal
transceiver operating from a 2.3 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
DIAGRAMS
20
SOIC−20
DW SUFFIX
CASE 751D
performance. A V specification of 5.5 V allows MC74LCX245 inputs
I
to be safely driven from 5 V devices. The MC74LCX245 is suitable
for memory address driving and all TTL level bus oriented transceiver
applications.
Current drive capability is 24 mA at both A and B ports. The
Transmit/Receive (T/R) input determines the direction of data flow
through the bi−directional transceiver. Transmit (active−HIGH)
enables data from A ports to B ports; Receive (active−LOW) enables
data from B to A ports. The Output Enable input, when HIGH,
disables both A and B ports by placing them in a HIGH Z condition.
LCX245
AWLYYWW
20
1
1
20
LCX
245
ALYW
TSSOP−20
DT SUFFIX
CASE 948E
20
Features
1
1
• Designed for 2.3 to 3.6 V V Operation
CC
• 5 V Tolerant − Interface Capability With 5 V TTL Logic
• Supports Live Insertion and Withdrawal
20
• I
Specification Guarantees High Impedance When V = 0 V
CC
OFF
SOEIAJ−20
M SUFFIX
CASE 967
1
74LCX245
AWLYWW
• LVTTL Compatible
• LVCMOS Compatible
20
1
• 24 mA Balanced Output Sink and Source Capability
• Near Zero Static Supply Current in All Three Logic States (10 mA)
Substantially Reduces System Power Requirements
A
L, WL
Y, YY
= Assembly Location
= Wafer Lot
= Year
• Latchup Performance Exceeds 500 mA
• ESD Performance:
Human Body Model >2000 V
Machine Model >200 V
W, WW = Work Week
• Pb−Free Packages are Available*
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 3 of this data sheet.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
Semiconductor Components Industries, LLC, 2005
1
Publication Order Number:
January, 2005 − Rev. 6
MC74LCX245/D
MC74LCX245
OE 19
T/R 1
V
OE B0
B1
B2
B3
B4
B5
B6
B7
CC
20
19
18
17
16
15
14
12
13
11
2
3
4
5
6
7
A0
A1
A2
A3
A4
A5
A6
A7
18
17
16
15
14
13
12
11
B0
B1
B2
B3
B4
B5
B6
B7
1
2
3
4
5
6
7
9
8
10
T/R A0
A1
A2
A3
A4
A5
A6
A7 GND
Figure 1. Pinout (Top View)
PIN NAMES
PINS
FUNCTION
OE
Output Enable Input
T/R
Transmit/Receive Input
A0−A7
B0−B7
Side A 3−State Inputs or 3−State Outputs
Side B 3−State Inputs or 3−StateOutputs
8
9
TRUTH TABLE
INPUTS
OPERATING MODE
Non−Inverting
OE
T/R
L
L
L
H
X
B Data to A Bus
A Data to B Bus
Z
H
Figure 2. Logic Diagram
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
MC74LCX245
MAXIMUM RATINGS
Symbol
Parameter
Value
Condition
Unit
V
V
V
V
DC Supply Voltage
−0.5 to +7.0
CC
I
DC Input Voltage
−0.5 ≤ V ≤ +7.0
V
I
DC Output Voltage
−0.5 ≤ V ≤ +7.0
Output in 3−State
V
O
O
−0.5 ≤ V ≤ V + 0.5
Output in HIGH or LOW State (Note 1)
V
O
CC
I
I
DC Input Diode Current
DC Output Diode Current
−50
V < GND
mA
mA
mA
mA
mA
mA
°C
IK
I
−50
+50
V < GND
O
OK
V
O
> V
CC
I
I
I
DC Output Source/Sink Current
DC Supply Current Per Supply Pin
DC Ground Current Per Ground Pin
Storage Temperature Range
±50
O
±100
±100
CC
GND
T
−65 to +150
STG
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
1. I absolute maximum rating must be observed.
O
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Typ
Max
Unit
V
CC
Supply Voltage
Operating
Data Retention Only
2.0
1.5
2.5, 3.3
2.5, 3.3
3.6
3.6
V
V
V
Input Voltage
0
5.5
V
V
I
Output Voltage
(HIGH or LOW State)
(3−State)
0
0
V
CC
5.5
O
I
HIGH Level Output Current
LOW Level Output Current
V
V
V
= 3.0 V − 3.6 V
= 2.7 V − 3.0 V
= 2.3 V − 2.7 V
− 24
− 12
− 8
mA
mA
OH
CC
CC
CC
I
OL
V
CC
V
CC
V
CC
= 3.0 V − 3.6 V
= 2.7 V − 3.0 V
= 2.3 V − 2.7 V
+ 24
+ 12
+ 8
T
Operating Free−Air Temperature
−40
0
+85
10
°C
A
Dt/DV
Input Transition Rise or Fall Rate, V from 0.8 V to 2.0 V, V = 3.0 V
ns/V
IN
CC
ORDERING INFORMATION
Device
†
Package
Shipping
MC74LCX245DW
MC74LCX245DWG
SOIC−20
38 Units / Rail
38 Units / Rail
SOIC−20
(Pb−Free)
MC74LCX245DWR2
MC74LCX245DR2G
SOIC−20
1000 Tape & Reel
1000 Tape & Reel
SOIC−20
(Pb−Free)
MC74LCX245DT
MC74LCX245DTR2
MC74LCX245M
TSSOP−20*
TSSOP−20*
SOEIAJ−20
SOEIAJ−20
75 Units / Rail
2000 Tape & Reel
40 Units / Rail
MC74LCX245MEL
2000 Tape & Reel
†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.
*This package is inherently Pb−Free.
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3
MC74LCX245
DC ELECTRICAL CHARACTERISTICS
T
A
= −40°C to +85°C
Symbol
Characteristic
Condition
2.3 V ≤ V ≤ 2.7 V
Min
1.7
2.0
Max
Unit
V
IH
HIGH Level Input Voltage (Note 2)
V
CC
2.7 V ≤ V ≤ 3.6 V
CC
2.3 V ≤ V ≤ 2.7 V
0.7
0.8
V
LOW Level Input Voltage (Note 2)
HIGH Level Output Voltage
V
V
CC
IL
2.7 V ≤ V ≤ 3.6 V
CC
2.3 V ≤ V ≤ 3.6 V; I = 100 mA
V
CC
− 0.2
V
OH
CC
OL
V
= 2.3 V; I = −8 mA
1.8
2.2
2.4
2.2
CC
OH
V
CC
V
CC
V
CC
= 2.7 V; I = −12 mA
OH
= 3.0 V; I = −18 mA
OH
= 3.0 V; I = −24 mA
OH
2.3 V ≤ V ≤ 3.6 V; I = 100 mA
0.2
0.6
0.4
0.4
0.55
±5
V
LOW Level Output Voltage
V
CC
OL
OL
V
CC
= 2.3 V; I = 8 mA
OL
V
= 2.7 V; I = 12 mA
OL
CC
CC
CC
V
V
= 3.0 V; I = 16 mA
OL
= 3.0 V; I = 24 mA
OL
I
I
Input Leakage Current
3−State Output Current
2.3 V ≤ V ≤ 3.6 V; 0 V ≤ V ≤ 5.5 V
mA
mA
I
CC
I
2.3 ≤ V ≤ 3.6 V; 0V ≤ V ≤ 5.5 V;
±5
OZ
CC
O
V = V or V
IL
I
IH
I
I
Power−Off Leakage Current
Quiescent Supply Current
V
= 0 V; V or V = 5.5 V
10
10
mA
mA
OFF
CC
I
O
2.3 ≤ V ≤ 3.6 V; V = GND or V
CC
CC
I
CC
2.3 ≤ V ≤ 3.6 V; 3.6 ≤ V or V ≤ 5.5 V
±10
500
CC
I
O
DI
CC
Increase in I per Input
2.3 ≤ V ≤ 3.6 V; V = V − 0.6 V
mA
CC
CC
IH
CC
2. These values of V are used to test DC electrical characteristics only.
I
AC CHARACTERISTICS t = t = 2.5 ns; R = 500 W
R
F
L
Limits
= −40°C to +85°C
T
A
V
CC
= 3.3 V ± 0.3 V
V
CC
= 2.7 V
V = 2.5 V ± 0.2 V
CC
C = 50 pF
L
C = 30 pF
L
C = 50 pF
L
Symbol
Parameter
Waveform
Unit
Min
Max
Min
Max
Min
Max
t
t
Propagation Delay
Input to Output
1
1.5
1.5
7.0
7.0
1.5
1.5
8.0
8.0
1.5
1.5
8.4
8.4
ns
PLH
PHL
t
t
Output Enable Time to
High and Low Level
2
2
1.5
1.5
8.5
8.5
1.5
1.5
9.5
9.5
1.5
1.5
10.5
10.5
ns
ns
ns
PZH
PZL
t
t
Output Disable Time From
High and Low Level
1.5
1.5
7.5
7.5
1.5
1.5
8.5
8.5
1.5
1.5
9.0
9.0
PHZ
PLZ
t
t
Output−to−Output Skew
(Note 3)
1.0
1.0
OSHL
OSLH
3. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.
The specification applies to any outputs switching in the same direction, either HIGH−to−LOW (t
guaranteed by design.
) or LOW−to−HIGH (t
); parameter
OSHL
OSLH
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4
MC74LCX245
DYNAMIC SWITCHING CHARACTERISTICS
T
A
= +25°C
Symbol
Characteristic
Condition
Min
Typ
Max
Unit
V
OLP
Dynamic LOW Peak Voltage (Note 4)
V
CC
V
CC
= 3.3 V, C = 50 pF, V = 3.3 V, V = 0 V
0.8
0.6
V
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 4)
V
CC
V
CC
= 3.3 V, C = 50 pF, V = 3.3 V, V = 0 V
−0.8
−0.6
V
V
L
IH
IL
= 2.5 V, C = 30 pF, V = 2.5 V, V = 0 V
L
IH
IL
4. 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
Parameter
Input Capacitance
Condition
= 3.3 V, V = 0 V or V
Typical
Unit
pF
C
C
C
V
V
7
8
IN
CC
I
CC
CC
Input/Output Capacitance
= 3.3 V, V = 0 V or V
pF
I/O
PD
CC
I
Power Dissipation Capacitance
10 MHz, V = 3.3 V, V = 0 V or V
25
pF
CC
I
CC
V
CC
OE, T/R
An, Bn
Vmi
Vmi
V
CC
0 V
Vmi
Vmi
t
t
PHZ
An, Bn
Bn, An
PZH
V
OH
V
HZ
0 V
t
t
PHL
PLH
Vmo
Vmo
V
OH
OL
Vmo
Vmo
t
t
PLZ
PZL
V
An, Bn
V
V
LZ
OL
WAVEFORM 1 − PROPAGATION DELAYS
= t = 2.5 ns, 10% to 90%; f = 1 MHz; t = 500 ns
WAVEFORM 2 − OUTPUT ENABLE AND DISABLE TIMES
= t = 2.5 ns, 10% to 90%; f = 1 MHz; t = 500 ns
t
R
t
R
F
W
F
W
V
CC
Symbol 3.3 V ± 0.3 V
2.7 V
1.5 V
1.5 V
2.5 V ± 0.2 V
Vmi
1.5 V
1.5 V
V
/2
/2
CC
CC
Vmo
V
V
HZ
V
LZ
V
+ 0.3 V
V
+ 0.3 V
− 0.3 V
V
OL
+ 0.15 V
− 015 V
OL
OL
V
OH
− 0.3 V
V
V
OH
OH
Figure 3. AC Waveforms
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5
MC74LCX245
V
CC
6 V
OPEN
GND
R
1
PULSE
GENERATOR
DUT
R
T
C
R
L
L
TEST
SWITCH
t
t
, t
Open
PLH PHL
, t
6 V at V = 3.3 ꢀ0.3 V
CC
PZL PLZ
6 V at V = 2.5 ꢀ0.2 V
CC
Open Collector/Drain t
and t
6 V
PLH
PHL
t
, t
GND
PZH PHZ
C = 50 pF at V = 3.3 ꢀ0.3 V or equivalent (includes jig and probe capacitance)
L
CC
C = 30 pF at V = 2.5 ꢀ0.2 V or equivalent (includes jig and probe capacitance)
L
CC
R = R = 500 W or equivalent
L
1
R = Z
of pulse generator (typically 50 W)
T
OUT
Figure 4. Test Circuit
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6
MC74LCX245
PACKAGE DIMENSIONS
SOIC−20
DW SUFFIX
CASE 751D−05
ISSUE G
NOTES:
D
1. DIMENSIONS ARE IN MILLIMETERS.
2. INTERPRET DIMENSIONS AND TOLERANCES
PER ASME Y14.5M, 1994.
A
q
3. DIMENSIONS D AND E DO NOT INCLUDE MOLD
PROTRUSION.
20
11
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE PROTRUSION
SHALL BE 0.13 TOTAL IN EXCESS OF B
DIMENSION AT MAXIMUM MATERIAL
CONDITION.
E
B
1
10
MILLIMETERS
DIM MIN
MAX
2.65
0.25
0.49
0.32
12.95
7.60
A
A1
B
C
D
E
2.35
0.10
0.35
0.23
12.65
7.40
20X B
M
S
S
B
T
0.25
A
e
1.27 BSC
H
h
10.05
0.25
0.50
0
10.55
0.75
0.90
7
A
L
q
_
_
SEATING
PLANE
18X e
A1
C
T
TSSOP−20
DT SUFFIX
CASE 948E−02
ISSUE B
NOTES:
20X K REF
1. DIMENSIONING AND TOLERANCING
PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION:
MILLIMETER.
M
S
S
V
0.10 (0.004)
T U
S
0.15 (0.006) T U
K
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.
K1
20
11
2X L/2
J J1
B
L
−U−
PIN 1
IDENT
SECTION N−N
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.
1
10
0.25 (0.010)
N
S
0.15 (0.006) T U
6. TERMINAL NUMBERS ARE SHOWN
FOR REFERENCE ONLY.
7. DIMENSION A AND B ARE TO BE
DETERMINED AT DATUM PLANE −W−.
M
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
−W−
F
C
G
H
0.65 BSC
0.026 BSC
0.27
0.09
0.09
0.19
0.19
0.37
0.011
0.015
0.008
0.006
0.012
0.010
J
0.20 0.004
0.16 0.004
0.30 0.007
0.25 0.007
G
D
J1
K
H
DETAIL E
0.100 (0.004)
−T− SEATING
K1
L
6.40 BSC
0 8 0 8
0.252 BSC
M
_
_
_
_
PLANE
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7
MC74LCX245
PACKAGE DIMENSIONS
SOEIAJ−20
M SUFFIX
CASE 967−01
ISSUE O
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
L
E
20
11
Q
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS D AND E DO NOT INCLUDE MOLD
FLASH OR PROTRUSIONS AND ARE MEASURED
AT THE PARTING LINE. MOLD FLASH OR
PROTRUSIONS SHALL NOT EXCEED 0.15 (0.006)
PER SIDE.
1
H
E
_
E
M
4. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
L
1
10
5. THE LEAD WIDTH DIMENSION (b) DOES NOT
INCLUDE DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.08 (0.003)
TOTAL IN EXCESS OF THE LEAD WIDTH
DIMENSION AT MAXIMUM MATERIAL CONDITION.
DAMBAR CANNOT BE LOCATED ON THE LOWER
RADIUS OR THE FOOT. MINIMUM SPACE
BETWEEN PROTRUSIONS AND ADJACENT LEAD
TO BE 0.46 ( 0.018).
DETAIL P
Z
D
VIEW P
e
A
c
MILLIMETERS
INCHES
MIN
DIM MIN
MAX
2.05
0.20
0.50
0.27
12.80
5.45
MAX
0.081
0.008
0.020
0.011
0.504
0.215
A
A
1
−−−
0.05
0.35
0.18
12.35
5.10
−−−
0.002
0.014
0.007
0.486
0.201
A
b
1
b
c
M
0.10 (0.004)
0.13 (0.005)
D
E
e
1.27 BSC
0.050 BSC
H
7.40
0.50
1.10
8.20
0.85
1.50
0.291
0.020
0.043
0.323
0.033
0.059
E
L
L
E
M
Q
0
10
0
10
_
0.035
0.032
_
_
_
0.70
−−−
0.90
0.81
0.028
−−−
1
Z
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
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Phone: 81−3−5773−3850
For additional information, please contact your
local Sales Representative.
MC74LCX245/D
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Low-Voltage CMOS Octal Transceiver With 5 V−Tolerant Inputs and Outputs (3−State, Inverting)
ONSEMI
MC74LCX245MR2
LVC/LCX/Z SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20, EIAJ, PLASTIC, SOIC-20
MOTOROLA
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