74LVC245A
Low-Voltage CMOS Octal
Transceiver
With 5 V−Tolerant Inputs and Outputs
(3−State, Non−Inverting)
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The 74LVC245A is a high performance, non−inverting octal
transceiver 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 74LVC245A inputs to
be safely driven from 5 V devices if V
CC
is less than 5.0 V. The
74LVC245A 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.
Features
MARKING
DIAGRAM
20
TSSOP−20
DT SUFFIX
CASE 948E
1
A
L
Y
W
G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
LVC
245A
ALYWG
G
20
1
•
•
•
•
•
•
Designed for 1.2 to 3.6 V V
CC
Operation
5 V Tolerant − Interface Capability with 5 V TTL Logic
Supports Live Insertion and Withdrawal
I
OFF
Specification Guarantees High Impedance When V
CC
= 0 V
24 mA Output Sink and Source Capability
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
Near Zero Static Supply Current in All Three Logic States (10
mA)
Substantially Reduces System Power Requirements
•
ESD Performance:
Human Body Model >2000 V
Machine Model >200 V
•
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
©
Semiconductor Components Industries, LLC, 2015
1
October, 2015 − Rev. 0
Publication Order Number:
74LVC245A/D
74LVC245A
V
CC
20
OE
19
B0
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
B7
11
OE 19
T/R 1
2
18
A0
B0
1
T/R
2
A0
3
A1
4
A2
5
A3
6
A4
7
A5
8
A6
9
A7
10
GND
A1
3
17
Figure 1. Pinout
(Top View)
A2
4
16
A3
5
15
A4
6
14
A5
7
13
OPERATING MODE
Non−Inverting
B Data to A Bus
A Data to B Bus
Z
A7
9
11
A6
8
12
B1
PIN NAMES
PINS
OE
T/R
A0−A7
B0−B7
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
B2
B3
B4
TRUTH TABLE
INPUTS
OE
L
L
H
T/R
L
H
X
B5
B6
B7
H = High Voltage Level
L = Low Voltage Level
Z = High Impedance State
X = High or Low Voltage Level and Transitions are Acceptable
For I
CC
reasons, Do Not Float Inputs
Figure 2. Logic Diagram
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74LVC245A
MAXIMUM RATINGS
Symbol
V
CC
V
I
V
O
Parameter
DC Supply Voltage
DC Input Voltage
DC Output Voltage
Output in 3−State
Output in HIGH or LOW State (Note 1)
I
IK
I
OK
DC Input Diode Current
DC Output Diode Current
V
I
< GND
V
O
< GND
V
O
> V
CC
I
O
I
CC
I
GND
T
STG
T
L
T
J
q
JA
MSL
DC Output Source/Sink Current
DC Supply Current Per Supply Pin
DC Ground Current Per Ground Pin
Storage Temperature Range
Lead Temperature, 1 mm from Case for
10 Seconds
Junction Temperature Under Bias
Thermal Resistance (Note 2)
Moisture Sensitivity
Level 1
Condition
Value
−0.5 to +6.5
−0.5
≤
V
I
≤
+6.5
−0.5
≤
V
O
≤
+6.5
−0.5
≤
V
O
≤
V
CC
+ 0.5
−50
−50
+50
±50
±100
±100
−65 to +150
T
L
= 260
T
J
= 135
110.7
mA
mA
mA
mA
mA
mA
°C
°C
°C
°C/W
Unit
V
V
V
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
O
absolute maximum rating must be observed.
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
V
CC
V
I
V
O
I
OH
I
OL
T
A
Dt/DV
Supply Voltage
Input Voltage
Output Voltage
HIGH Level Output Current
LOW Level Output Current
Operating Free−Air Temperature
Input Transition Rise or Fall Rate
V
CC
= 1.2 to 2.7 V
V
CC
= 2.7 to 3.6 V
HIGH or LOW State
3−State
V
CC
= 3.0 V − 3.6 V
V
CC
= 2.7 V − 3.0 V
V
CC
= 3.0 V − 3.6 V
V
CC
= 2.7 V − 3.0 V
−40
0
0
Parameter
Operating
Functional
Min
1.65
1.2
0
0
0
Typ
Max
3.6
3.6
5.5
V
CC
5.5
−24
−12
24
12
+125
20
10
Unit
V
V
V
mA
mA
°C
ns/V
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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74LVC245A
DC ELECTRICAL CHARACTERISTICS
−40 to +855C
Min
1.08
0.65 x
V
CC
1.7
2.0
−
−
−
−
Typ
(Note 3)
−
−
−
−
−
−
−
−
Max
−
−
−
−
0.12
0.35 x
V
CC
0.7
0.8
−40 to +1255C
Min
1.08
0.65 x
V
CC
1.7
2.0
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
V
CC
−
0.3
1.05
1.65
2.05
2.25
2.0
−
−
−
−
−
−
±0.1
±0.1
±0.1
0.1
5
0.2
0.45
0.6
0.4
0.55
±5
±5
±10
10
500
−
−
−
−
−
−
−
−
−
−
Typ
(Note 3)
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
±0.1
±0.1
±0.1
0.1
5
Max
−
−
−
−
0.12
0.35 x
V
CC
0.7
0.8
−
−
−
−
−
−
−
−
0.3
0.65
0.8
0.6
0.8
±20
±20
±20
40
5000
mA
mA
mA
mA
mA
V
V
V
Symbol
V
IH
Parameter
HIGH−level input voltage
Conditions
V
CC
= 1.2 V
V
CC
= 1.65 V to 1.95 V
V
CC
= 2.3 V to 2.7 V
V
CC
= 2.7 V to 3.6 V
Unit
V
V
IL
LOW−level input voltage
V
CC
= 1.2 V
V
CC
= 1.65 V to 1.95 V
V
CC
= 2.3 V to 2.7 V
V
CC
= 2.7 V to 3.6 V
V
OH
HIGH−level output voltage
V
I
= V
IH
or V
IL
I
O
= −100
mA;
V
CC
= 1.65 V to 3.6 V
I
O
= −4 mA; V
CC
= 1.65 V
I
O
= −8 mA; V
CC
= 2.3 V
I
O
= −12 mA; V
CC
= 2.7 V
I
O
= −18 mA; V
CC
= 3.0 V
I
O
= −24 mA; V
CC
= 3.0 V
V
CC
−
0.2
1.2
1.8
2.2
2.4
2.2
V
OL
LOW−level output voltage
V
I
= V
IH
or V
IL
I
O
= 100
mA;
V
CC
= 1.65 V to 3.6 V
I
O
= 4 mA; V
CC
= 1.65 V
I
O
= 8 mA; V
CC
= 2.3 V
I
O
= 12 mA; V
CC
= 2.7 V
I
O
= 24 mA; V
CC
= 3.0 V
−
−
−
−
−
−
−
−
−
−
I
I
I
OZ
I
OFF
I
CC
I
CC
Input leakage current
OFF−state output current
Power−off leakage current
Supply current
Additional supply current
V
I
= 5.5 V or GND
V
CC
= 3.6 V
V
I
= V
IH
or V
IL
; V
O
= 5.5 V or
GND; V
CC
= 3.6 V
V
I
or V
O
= 5.5 V; V
CC
= 0 V
V
I
= V
CC
or GND; I
O
= 0 A;
V
CC
= 3.6 V
per input pin; V
I
= V
CC
− 0.6 V;
I
O
= 0 A; 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
A
= 25°C and V
CC
= 3.3 V, unless stated otherwise.
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74LVC245A
AC ELECTRICAL CHARACTERISTICS
(t
R
= t
F
= 2.5 ns)
−40 to +855C
Symbol
t
pd
Parameter
Propagation Delay (Note 5)
An to Bn, Bn to An
Conditions
V
CC
= 1.2 V
V
CC
= 1.65 V to 1.95 V
V
CC
= 2.3 V to 2.7 V
V
CC
= 2.7 V
V
CC
= 3.0 V to 3.6 V
t
en
Enable Time (Note 6)
OE to An, Bn
V
CC
= 1.2 V
V
CC
= 1.65 V to 1.95 V
V
CC
= 2.3 V to 2.7 V
V
CC
= 2.7 V
V
CC
= 3.0 V to 3.6 V
t
dis
Disable Time (Note 7)
OE to An, Bn
V
CC
= 1.2 V
V
CC
= 1.65 V to 1.95 V
V
CC
= 2.3 V to 2.7 V
V
CC
= 2.7 V
V
CC
= 3.0 V to 3.6 V
t
sk(0)
4.
5.
6.
7.
8.
Output Skew Time (Note 8)
Min
−
1.5
1.0
1.0
1.0
−
1.0
1.0
1.0
0.5
−
1.0
1.0
1.0
0.5
−
Typ
(Note 4)
17.0
6.5
3.4
3.4
2.9
22.0
8.3
4.6
4.8
3.7
12.0
5.5
3.1
3.9
3.6
−
Max
−
14.6
7.6
7.3
6.3
−
19.5
10.7
9.5
8.5
−
12.3
7.1
8.0
7.0
1.0
−40 to +1255C
Min
−
1.0
1.0
1.0
1.0
−
1.0
1.0
0.5
0.5
−
1.0
1.0
0.5
0.5
−
Typ
(Note 4)
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
Max
−
16.9
8.7
9.5
8.0
−
22.5
12.4
12.0
11.0
−
14.2
8.2
10.0
9.0
1.5
ns
ns
ns
Unit
ns
Typical values are measured at T
A
= 25°C and V
CC
= 3.3 V, unless stated otherwise.
t
pd
is the same as t
PLH
and t
PHL
.
t
en
is the same as t
PZL
and t
PZH
.
t
dis
is the same as t
PLZ
and t
PHZ
.
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
Symbol
V
OLP
V
OLV
Characteristic
Dynamic LOW Peak Voltage (Note 9)
Dynamic LOW Valley Voltage (Note 9)
Condition
V
CC
= 3.3 V, C
L
= 50 pF, V
IH
= 3.3 V, V
IL
= 0 V
V
CC
= 2.5 V, C
L
= 30 pF, V
IH
= 2.5 V, V
IL
= 0 V
V
CC
= 3.3 V, C
L
= 50 pF, V
IH
= 3.3 V, V
IL
= 0 V
V
CC
= 2.5 V, C
L
= 30 pF, V
IH
= 2.5 V, V
IL
= 0 V
Min
Typ
0.8
0.6
−0.8
−0.6
Max
Unit
V
V
V
V
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
C
IN
C
I/O
C
PD
Parameter
Input Capacitance (OE, T/R)
Input/Output Capacitance
Power Dissipation Capacitance
(Note 10)
Condition
V
CC
= 3.3 V, V
I
= 0 V or V
CC
V
CC
= 3.3 V, V
I
= 0 V or V
CC
Per input; V
I
= GND or V
CC
V
CC
= 1.65 V to 1.95 V
V
CC
= 2.3 V to 2.7 V
V
CC
= 3.0 V to 3.6 V
10. C
PD
is used to determine the dynamic power dissipation (P
D
in
mW).
P
D
= C
PD
x V
CC2
x fi x N +
S(C
L
x V
CC2
x fo) where:
fi = input frequency in MHz; fo = output frequency in MHz
C
L
= output load capacitance in pF
V
CC
= supply voltage in Volts
N = number of outputs switching
S(C
L
x
V
CC2
x fo) = sum of the outputs.
7.7
11.3
14.4
Typical
4.0
10.0
Unit
pF
pF
pF
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