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PDF 74LVC245A Data sheet ( Hoja de datos )
| Número de pieza | 74LVC245A | |
| Descripción | Low-Voltage CMOS Octal Transceiver | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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74LVC245A
Low-Voltage CMOS Octal
Transceiver
With 5 V−Tolerant Inputs and Outputs
(3−State, Non−Inverting)
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 VI specification of 5.5 V allows 74LVC245A inputs to
be safely driven from 5 V devices if VCC 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
• Designed for 1.2 to 3.6 V VCC Operation
• 5 V Tolerant − Interface Capability with 5 V TTL Logic
• Supports Live Insertion and Withdrawal
• IOFF Specification Guarantees High Impedance When VCC = 0 V
• 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: Human Body Model >2000 V
Machine Model >200 V
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
www.onsemi.com
20
1
MARKING
DIAGRAM
20
TSSOP−20
DT SUFFIX
CASE 948E
1
LVC
245A
ALYWG
G
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
(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.
© Semiconductor Components Industries, LLC, 2015
October, 2015 − Rev. 0
1
Publication Order Number:
74LVC245A/D
1 page  
74LVC245A
AC ELECTRICAL CHARACTERISTICS (tR = tF = 2.5 ns)
−40 to +855C
−40 to +1255C
Symbol
Parameter
Conditions
Typ Typ
Min (Note 4) Max Min (Note 4) Max
tpd Propagation Delay (Note 5)
An to Bn, Bn to An
VCC = 1.2 V
VCC = 1.65 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 2.7 V
VCC = 3.0 V to 3.6 V
−
1.5
1.0
1.0
1.0
17.0 −
−
6.5 14.6 1.0
3.4 7.6 1.0
3.4 7.3 1.0
2.9 6.3 1.0
−−
− 16.9
− 8.7
− 9.5
− 8.0
ten Enable Time (Note 6)
OE to An, Bn
VCC = 1.2 V
VCC = 1.65 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 2.7 V
VCC = 3.0 V to 3.6 V
−
1.0
1.0
1.0
0.5
22.0 −
−
8.3 19.5 1.0
4.6 10.7 1.0
4.8 9.5 0.5
3.7 8.5 0.5
−−
− 22.5
− 12.4
− 12.0
− 11.0
tdis Disable Time (Note 7)
OE to An, Bn
VCC = 1.2 V
VCC = 1.65 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 2.7 V
VCC = 3.0 V to 3.6 V
−
1.0
1.0
1.0
0.5
12.0 −
−
5.5 12.3 1.0
3.1 7.1 1.0
3.9 8.0 0.5
3.6 7.0 0.5
−−
− 14.2
− 8.2
− 10.0
− 9.0
tsk(0) Output Skew Time (Note 8)
− − 1.0 − − 1.5
4. Typical values are measured at TA = 25°C and VCC = 3.3 V, unless stated otherwise.
5. tpd is the same as tPLH and tPHL.
6. ten is the same as tPZL and tPZH.
7. tdis is the same as tPLZ and tPHZ.
8. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.
Unit
ns
ns
ns
ns
DYNAMIC SWITCHING CHARACTERISTICS
Symbol
Characteristic
Condition
TA = +25°C
Min Typ Max
Unit
VOLP Dynamic LOW Peak Voltage (Note 9)
VCC = 3.3 V, CL = 50 pF, VIH = 3.3 V, VIL = 0 V
VCC = 2.5 V, CL = 30 pF, VIH = 2.5 V, VIL = 0 V
0.8
0.6
V
V
VOLV
Dynamic LOW Valley Voltage (Note 9)
VCC = 3.3 V, CL = 50 pF, VIH = 3.3 V, VIL = 0 V
VCC = 2.5 V, CL = 30 pF, VIH = 2.5 V, VIL = 0 V
−0.8
−0.6
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
Parameter
Condition
CIN Input Capacitance (OE, T/R)
VCC = 3.3 V, VI = 0 V or VCC
CI/O Input/Output Capacitance
VCC = 3.3 V, VI = 0 V or VCC
CPD Power Dissipation Capacitance
(Note 10)
Per input; VI = GND or VCC
VCC = 1.65 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 3.0 V to 3.6 V
10. CPD is used to determine the dynamic power dissipation (PD in mW).
PD = CPD x VCC2 x fi x N + S(CL x VCC2 x fo) where:
fi = input frequency in MHz; fo = output frequency in MHz
CL = output load capacitance in pF
VCC = supply voltage in Volts
N = number of outputs switching
S(CL x VCC2 x fo) = sum of the outputs.
Typical
4.0
10.0
7.7
11.3
14.4
Unit
pF
pF
pF
www.onsemi.com
5
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