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74LCX245 Datenblatt(PDF) 5 Page - STMicroelectronics

Teilenummer 74LCX245
Bauteilbeschribung  LOW VOLTAGE CMOS OCTAL BUS TRANSCEIVER (3-STATE) WITH 5V TOLERANT INPUTS AND OUTPUTS
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74LCX245 Datenblatt(HTML) 5 Page - STMicroelectronics

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Table 8: AC Electrical Characteristics
1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch-
ing in the same direction, either HIGH or LOW (tOSLH = | tPLHm - tPLHn|, tOSHL = | tPHLm - tPHLn|)
2) Parameter guaranteed by design
Table 9: Capacitive Characteristics
1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/8 (per circuit)
Symbol
Parameter
Test Condition
Value
Unit
VCC
(V)
CL
(pF)
RL
(
Ω)
ts = tr
(ns)
-40 to 85 °C
-55 to 125 °C
Min.
Max.
Min.
Max.
tPLH tPHL
Propagation Delay
Time
2.7
50
500
2.5
1.5
8.0
1.5
9.2
ns
3.0 to 3.6
1.5
7.0
1.5
8.1
tPZL tPZH
Output Enable Time
2.7
50
500
2.5
1.5
9.5
1.5
10.7
ns
3.0 to 3.6
1.5
8.5
1.5
9.7
tPLZ tPHZ
Output Disable Time
2.7
50
500
2.5
1.5
8.5
1.5
9.7
ns
3.0 to 3.6
1.5
7.5
1.5
8.7
tOSLH
tOSHL
Output To Output
Skew Time (note1,
2)
3.0 to 3.6
50
500
2.5
1.0
1.0
ns
Symbol
Parameter
Test Condition
Value
Unit
VCC
(V)
TA = 25 °C
Min.
Typ.
Max.
CIN
Input Capacitance
3.3
VIN = 0 to VCC
6pF
COUT
Output Capacitance
3.3
VIN = 0 to VCC
12
pF
CPD
Power Dissipation Capacitance
(note 1)
3.3
fIN = 10MHz
VIN = 0 or VCC
45
pF


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