Page 1
SEMICONDUCTOR TECHNICAL DATA
1
REV 0
Motorola, Inc. 1997
6/97
The MC74LVX245 is an advanced high speed CMOS octal bus
transceiver.
It is intended for two–way asynchronous communication between data
buses. The direction of data transmission is determined by the level of the
T/R
input. The output enable pin (OE) can be used to disable the device,
so that the buses are effectively isolated.
All inputs are equipped with protection circuits against static discharge.
• High Speed: t
PD
= 4.7ns (Typ) at VCC = 3.3V
• Low Power Dissipation: I
CC
= 4µA (Max) at TA = 25°C
• Power Down Protection Provided on Inputs
• Balanced Propagation Delays
• Low Noise: V
OLP
= 0.8V (Max)
• Pin and Function Compatible with Other Standard Logic Families
• Latchup Performance Exceeds 300mA
• ESD Performance: HBM > 2000V; Machine Model > 200V
APPLICATION NOTES
1. Do not force a signal on an I/O pin when it is an active output, damage may
occur.
2. All floating (high impedence) input or I/O pins must be fixed by means of
pull up or pull down resistors or bus terminator ICs.
3. A parasitic diode is formed between the bus and VCC terminals. Therefore,
the LVX245 cannot be used to interface 5V to 3V systems directly.
Figure 1. 20–Lead Pinout (Top View)
1920 18 17 16 15 14
21 34567
V
CC
13
8
12
9
11
10
OE
B0 B1 B2 B3 B4 B5 B6 B7
T/R
A0 A1 A2 A3 A4 A5 A6 A7 GND
LVX
LOW–VOLTAGE CMOS
DW SUFFIX
20–LEAD SOIC PACKAGE
CASE 751D–04
DT SUFFIX
20–LEAD TSSOP PACKAGE
CASE 948E–02
M SUFFIX
20–LEAD SOIC EIAJ PACKAGE
CASE 967–01
PIN NAMES
Function
Output Enable Input
Transmit/Receive Input
Side A 3–State Inputs or 3–State
Outputs
Side B 3–State Inputs or 3–State
Outputs
Pins
OE
T/R
A0–A7
B0–B7
Page 2
MC74LVX245
MOTOROLA LCX DATA
BR1339 — REV 3
2
B0
OE
19
T/R 1
A0
B1
A1
B2
A2
B3
A3
B4
A4
B5
A5
B6
A6
B7
A7
Figure 2. Logic Diagram
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
INPUTS
OE T/R
OPERATING MODE
Non–Inverting
L L B Data to A Bus
L H A Data to B Bus
H X Z
H = High Voltage Level; L = Low V oltage Level; Z = High Impedance State; X = High or Low Voltage Level
and Transitions are Acceptable; For ICC reasons, Do Not Float Inputs
Page 3
MC74LVX245
LCX DATA
BR1339 — REV 3
3 MOTOROLA
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
V
CC
DC Supply Voltage
–0.5 to +7.0
V
V
in
DC Input Voltage (T/R, OE)
–0.5 to +7.0
V
V
I/O
DC Output Voltage
–0.5 to VCC +0.5
V
I
IK
Input Diode Current
–20
mA
I
OK
Output Diode Current
±20
mA
I
out
DC Output Current, per Pin
±25
mA
I
CC
DC Supply Current, VCC and GND Pins
±75
mA
P
D
Power Dissipation
180
mW
T
stg
Storage Temperature
–65 to +150
_
C
* Absolute maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or
conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute–maximum–rated conditions is
not implied.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Max
Unit
V
CC
DC Supply Voltage
2.0
3.6
V
V
in
DC Input Voltage (T/R, OE)
0
5.5
V
V
I/O
DC Output Voltage
0
V
CC
V
T
A
Operating Temperature, All Package Types
–40
+85
_
C
∆t/∆V
Input Rise and Fall Time
0
100
ns/V
DC ELECTRICAL CHARACTERISTICS
ОООООО
V
TA = 25°C
TA = – 40 to 85°C
Symbol
Parameter
ОООООО
Test Conditions
V
CC
V
Min
Typ
Max
Min
Max
Unit
ÎÎ
Î
V
IH
ОООООО
Î
High–Level Input Voltage
ОООООО
ОООООÎÎ
Î
2.0
3.0
3.6
ÎÎ
Î
1.5
2.0
2.4
ÎÎÎÎÎÎÎ
Î
1.5
2.0
2.4
ÎÎÎÎ
V
ÎÎ
Î
V
IL
ОООООО
Î
Low–Level Input Voltage
ОООООО
ОООООÎÎ
Î
2.0
3.0
3.6
ÎÎÎÎÎÎÎ
Î
0.5
0.8
0.8
ÎÎÎÎÎ
Î
0.5
0.8
0.8
Î
V
ÎÎ
Î
ÎÎ
Î
V
OH
ОООООО
Î
ОООООО
Î
High–Level Output Voltage
(Vin = VIH or VIL)
ОООООО
ООООО
Î
ООООО
Î
IOH = –50µA
IOH = –50µA
IOH = –4mA
Î
Î
Î
Î
2.0
3.0
3.0
ÎÎ
Î
ÎÎ
Î
1.9
2.9
2.58
Î
Î
Î
Î
2.0
3.0
ÎÎ
Î
ÎÎ
Î
ÎÎ
Î
ÎÎ
Î
1.9
2.9
2.48
ÎÎ
Î
ÎÎ
Î
Î
Î
V
ÎÎ
Î
V
OL
ОООООО
Î
Low–Level Output Voltage
(Vin = VIH or VIL)
ОООООО
ООООО
Î
IOL = 50µA
IOL = 50µA
IOL = 4mA
Î
Î
2.0
3.0
3.0
ÎÎÎÎ
Î
0.0
0.0
ÎÎ
Î
0.1
0.1
0.36
ÎÎÎÎÎ
Î
0.1
0.1
0.44
Î
V
ÎÎ
Î
I
in
ОООООО
Î
Input Leakage Current
ОООООО
ООООО
Î
Vin = 5.5V or GND
(T/R
, OE)
Î
Î
3.6
ÎÎÎÎÎÎÎ
Î
±0.1
ÎÎÎÎÎ
Î
±1.0
Î
µA
I
OZ
Maximum Three–State
Leakage Current
ОООООО
Vin = VIL or V
IH
V
out
= VCC or GND
3.6
±0.25
±2.5
µA
I
CC
Quiescent Supply Current
ОООООО
Vin = VCC or GND
3.6
4.0
40.0
µA
Page 4
MC74LVX245
MOTOROLA LCX DATA
BR1339 — REV 3
4
AC ELECTRICAL CHARACTERISTICS (Input t
r
= tf = 3.0ns)
TA = 25°C
TA = – 40 to 85°C
Symbol
Parameter
Test Conditions
Min
Typ
Max
Min
Max
Unit
ÎÎ
Î
t
PLH
,
t
PHL
ОООООО
Î
Propagation Delay
Input to Output
ООООООО
Î
VCC = 2.7V CL = 15pF
CL = 50pF
ÎÎÎÎ
Î
6.1
8.6
ÎÎ
Î
10.7
14.2
Î
Î
1.0
1.0
ÎÎ
Î
13.5
17.0
ns
ÎÎÎООООООÎООООООО
Î
VCC = 3.3 ± 0.3V CL = 15pF
CL = 50pF
ÎÎÎÎ
Î
4.7
7.2
ÎÎ
Î
6.6
10.1
Î
Î
1.0
1.0
ÎÎ
Î
8.0
11.5
ÎÎ
Î
t
PZL
,
t
PZH
ОООООО
Î
Output Enable Time to
High and Low Level
ООООООО
Î
VCC = 2.7V CL = 15pF
RL = 1kΩ CL = 50pF
ÎÎÎÎ
Î
9.0
11.5
ÎÎ
Î
16.9
20.4
Î
Î
1.0
1.0
ÎÎ
Î
20.5
24.0
ns
ÎÎÎООООООÎООООООО
Î
VCC = 3.3 ± 0.3V CL = 15pF
RL = 1kΩ CL = 50pF
ÎÎÎÎ
Î
7.1
9.6
ÎÎ
Î
11.0
14.5
Î
Î
1.0
1.0
ÎÎ
Î
13.0
16.5
ÎÎ
Î
t
PLZ
,
t
PHZ
ОООООО
Î
Output Disable Time From
High and Low Level
ООООООО
Î
VCC = 2.7V CL = 50pF
RL = 1kΩ
ÎÎÎÎ
Î
11.5
ÎÎ
Î
18.0
Î
Î
1.0
ÎÎ
Î
21.0
ns
VCC = 3.3 ± 0.3V CL = 50pF
RL = 1kΩ
9.6
12.8
1.0
14.5
ÎÎ
Î
t
OSHL
t
OSLH
ОООООО
Î
Output–to–Output Skew
(Note 1.)
ООООООО
Î
VCC = 2.7V CL = 50pF
VCC = 3.3 ±0.3V CL = 50pF
ÎÎÎÎÎÎÎ
Î
1.5
1.5
ÎÎÎÎ
Î
1.5
1.5
ns
1. 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
OSHL
) or LOW–to–HIGH (t
OSLH
); parameter
guaranteed by design.
CAPACITIVE CHARACTERISTICS
TA = 25°C
TA = – 40 to 85°C
Symbol
Parameter
Min
Typ
Max
Min
Max
Unit
C
in
Input Capacitance (T/R, OE)
4
10
10
pF
C
I/O
Maximum Three–State I/O Capacitance
8
pF
C
PD
Power Dissipation Capacitance (Note 2.)
21
pF
2. CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.
Average operating current can be obtained by the equation: I
CC(OPR
)
= CPD VCC fin + ICC/8 (per bit). CPD is used to determine the no–load
dynamic power consumption; PD = CPD V
CC
2
fin + ICC VCC.
NOISE CHARACTERISTICS (Input t
r
= tf = 3.0ns, CL = 50pF, VCC = 3.3V , Measured in SOIC Package)
TA = 25°C
Symbol Characteristic
Typ Max
Unit
V
OLP
Quiet Output Maximum Dynamic V
OL
0.5 0.8 V
V
OLV
Quiet Output Minimum Dynamic V
OL
–0.5 –0.8 V
V
IHD
Minimum High Level Dynamic Input Voltage 2.0 V
V
ILD
Maximum Low Level Dynamic Input Voltage 0.8 V
Page 5
MC74LVX245
LCX DATA
BR1339 — REV 3
5 MOTOROLA
Figure 3. Figure 4.
V
CC
GND
Input
A or B
Output
B or A
50%
50% V
CC
t
PLH
t
PHL
SWITCHING W AVEFORMS
OE
A or B
A or B
50% V
CC
50% V
CC
50% V
CC
t
PZL
t
PLZ
t
PZHtPHZ
V
CC
GND
HIGH
IMPEDANCE
VOL +0.3V
VOH –0.3V
HIGH
IMPEDANCE
V
CC
GND
50%
T/R
50% V
CC
*Includes all probe and jig capacitance
CL*
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
*Includes all probe and jig capacitance
CL*
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
CONNECT TO VCC WHEN
TESTING t
PLZ
AND t
PZL
.
CONNECT TO GND WHEN
TESTING t
PHZ
AND t
PZH
.
1 k
Ω
TEST CIRCUITS
Figure 5. Propagation Delay Test Circuit Figure 6. Three–State Test Circuit
Page 6
MC74LVX245
MOTOROLA LCX DATA
BR1339 — REV 3
6
OUTLINE DIMENSIONS
DW SUFFIX
PLASTIC SOIC PACKAGE
CASE 751D–04
ISSUE E
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.150
(0.006) PER SIDE.
5. DIMENSION D DOES NOT INCLUDE
DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.13
(0.005) TOTAL IN EXCESS OF D DIMENSION
AT MAXIMUM MATERIAL CONDITION.
–A–
–B–
20
1
11
10
S
A
M
0.010 (0.25) B
S
T
D20X
M
B
M
0.010 (0.25)
P10X
J
F
G
18X
K
C
–T–
SEATING
PLANE
M
R
X 45
_
DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A 12.65 12.95 0.499 0.510
B 7.40 7.60 0.292 0.299
C 2.35 2.65 0.093 0.104
D 0.35 0.49 0.014 0.019
F 0.50 0.90 0.020 0.035
G 1.27 BSC 0.050 BSC
J 0.25 0.32 0.010 0.012
K 0.10 0.25 0.004 0.009
M 0 7 0 7
P 10.05 10.55 0.395 0.415
R 0.25 0.75 0.010 0.029
__
__
DT SUFFIX
PLASTIC TSSOP PACKAGE
CASE 948E–02
ISSUE A
DIMAMIN MAX MIN MAX
INCHES
6.60 0.260
MILLIMETERS
B 4.30 4.50 0.169 0.177
C 1.20 0.047
D 0.05 0.15 0.002 0.006
F 0.50 0.75 0.020 0.030
G 0.65 BSC 0.026 BSC
H 0.27 0.37 0.011 0.015
J 0.09 0.20 0.004 0.008
J1 0.09 0.16 0.004 0.006
K 0.19 0.30 0.007 0.012
K1 0.19 0.25 0.007 0.010
L 6.40 BSC 0.252 BSC
M 0 8 0 8
____
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
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.
6. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
7. DIMENSION A AND B ARE TO BE DETERMINED
AT DATUM PLANE –W–.
110
1120
PIN 1
IDENT
A
B
–T–
0.100 (0.004)
C
D
G
H
SECTION N–N
K
K1
JJ1
N
N
M
F
–W–
SEATING
PLANE
–V–
–U–
S
U
M
0.10 (0.004) V
S
T
20X REFK
L
L/2
2X
S
U0.15 (0.006) T
DETAIL E
0.25 (0.010)
DETAIL E
6.40 0.252
––– –––
S
U0.15 (0.006) T
Page 7
MC74LVX245
LCX DATA
BR1339 — REV 3
7 MOTOROLA
OUTLINE DIMENSIONS
M SUFFIX
PLASTIC SOIC EIAJ PACKAGE
CASE 967–01
ISSUE O
DIM MIN MAX MIN MAX
INCHES
––– 2.05 ––– 0.081
MILLIMETERS
0.05 0.20 0.002 0.008
0.35 0.50 0.014 0.020
0.18 0.27 0.007 0.011
12.35 12.80 0.486 0.504
5.10 5.45 0.201 0.215
1.27 BSC 0.050 BSC
7.40 8.20 0.291 0.323
0.50 0.85 0.020 0.033
1.10 1.50 0.043 0.059
0
0.70 0.90 0.028 0.035
––– 0.81 ––– 0.032
A
1
H
E
Q
1
L
E
_
10
_
0
_
10
_
NOTES:
1 DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
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.
4 TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
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 MA TERIAL 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).
H
E
A
1
L
E
Q
1
_
c
A
Z
D
E
20
110
11
b
M
0.13 (0.005)
e
0.10 (0.004)
VIEW P
DETAIL P
M
L
A
b
c
D
E
e
L
M
Z
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the suitability of its products for any particular purpose, nor does Motorola 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 consequential or incidental damages. “T ypical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
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Opportunity/Affirmative Action Employer.
MC74LVX245/D
◊
Mfax is a trademark of Motorola, Inc.
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