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74LCXH245WMX Datasheet(PDF) 4 Page - Fairchild Semiconductor

No. de pieza 74LCXH245WMX
Descripción Electrónicos  Low Voltage Bidirectional Transceiver with Bushold
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Fabricante Electrónico  FAIRCHILD [Fairchild Semiconductor]
Página de inicio  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

74LCXH245WMX Datasheet(HTML) 4 Page - Fairchild Semiconductor

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4
DC Electrical Characteristics (Continued)
Note 5: Outputs disabled or 3-STATE only.
Note 6: An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note 7: An external driver must sink at least the specified current to switch from HIGH-to-LOW.
AC Electrical Characteristics
Note 8: 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 (tOSHL) or LOW-to-HIGH (tOSLH).
Dynamic Switching Characteristics
Capacitance
Symbol
Parameter
Conditions
VCC
TA = −40°C to +85°C
Units
(V)
Min
Max
II(HOLD)
Bushold Input Minimum
VIN = 0.7V
2.3
45
µA
Drive Hold Current
VIN = 1.7V
−45
VIN = 0.8V
3.0
75
VIN = 2.0V
−75
II(OD)
Bushold Input Over-Drive
(Note 6)
2.7
300
µA
Current to Change State
(Note 7)
−300
(Note 6)
3.6
450
(Note 7)
−450
IOZ
3-STATE I/O Leakage
VO = VCC or GND
2.3
− 3.6
±5.0
µA
ICC
Quiescent Supply Current
VI = VCC or GND
2.3
− 3.6
10
µA
3.6V
≤ V
I, VO ≤ 5.5V (Note 5)
2.3
− 3.6
±10
∆I
CC
Increase in ICC per Input
VIH = VCC −0.6V
2.3 - 3.6
500
µA
Symbol
Parameter
TA = −40°C to +85°C, RL = 500Ω
Units
VCC = 3.3V ± 0.3V
VCC = 2.7V
VCC = 2.5V ± 0.2V
CL = 50 pF
CL = 50 pF
CL = 30 pF
Min
Max
Min
Max
Min
Max
tPHL
Propagation Delay
1.5
7.0
1.5
8.0
1.5
8.4
ns
tPLH
An to Bn or Bn to An
1.5
7.0
1.5
8.0
1.5
8.4
tPZL
Output Enable Time
1.5
8.5
1.5
9.5
1.5
10.5
ns
tPZH
1.5
8.5
1.5
9.5
1.5
10.5
tPLZ
Output Disable Time
1.5
7.5
1.5
8.5
1.5
9.0
ns
tPHZ
1.5
7.5
1.5
8.5
1.5
9.0
tOSHL
Output to Output Skew
1.0
ns
tOSLH
(Note 8)
1.0
Symbol
Parameter
Conditions
VCC
TA = 25°C
Units
(V)
Typical
VOLP
Quiet Output Dynamic Peak VOL
CL = 50 pF, VIH = 3.3V, VIL = 0V
3.3
0.8
V
CL = 30 pF, VIH = 2.5V, VIL = 0V
2.5
0.6
VOLV
Quiet Output Dynamic Valley VOL
CL = 50 pF, VIH = 3.3V, V IL = 0V
3.3
−0.8
V
CL = 30 pF, VIH = 2.5V, VIL = 0V
2.5
−0.6
Symbol
Parameter
Conditions
Typical
Units
CIN
Input Capacitance
VCC = Open, VI = 0V or VCC
7pF
CI/O
Input/Output Capacitance
VCC = 3.3V, VI = 0V or VCC
8pF
CPD
Power Dissipation Capacitance
VCC = 3.3V, VI = 0V or VCC, f = 10 MHz
25
pF


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