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74LCX125 датащи(PDF) 7 Page - STMicroelectronics

номер детали 74LCX125
подробное описание детали  Low voltage CMOS quad bus buffer (3-State) with 5V tolerant inputs and outputs
PDF  16 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74LCX125 датащи(HTML) 7 Page - STMicroelectronics

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74LCX125
Electrical characteristics
7/16
Table 7. AC electrical characteristics
Symbol
Parameter
Test condition
Value
Unit
VCC
(V)
CL
(pF)
RL
(
Ω)
ts = tr
(ns)
-40 to 85 °C
Min
Max
tPLH tPHL Propagation delay
time
2.7
50
500
2.5
6.0
ns
3.0 to 3.6
1.0
5.2
tPZL tPZH Output enable
time to HIGH and
LOW level
2.7
50
500
2.5
1.0
6.0
ns
3.0 to 3.6
1.0
5.0
tPLZ tPHZ Output disable
time to HIGH and
LOW level
2.7
50
500
2.5
1.0
6.0
ns
3.0 to 3.6
1.0
5.0
tOSLH
tOSHL
Output to output
skew time (1) (2)
1.
Skew is defined as the absolute value of the difference between the actual propagation delay for any two
outputs of the same device switching in the same direction, either HIGH or LOW (tOSLH = | tPLHm - tPLHn|,
tOSHL = | tPHLm - tPHLn|)
2.
Parameter guaranteed by design
3.0 to 3.6
50
500
2.5
1.0
ns
Table 8. Capacitive characteristics
Symbol
Parameter
Test condition
Value
Unit
VCC
(V)
TA = 25 °C
Min
Typ
Max
CIN
Input capacitance
3.3
VIN = 0 to VCC
5pF
COUT
Output capacitance
3.3
VIN = 0 to VCC
10
pF
CPD
Power dissipation
capacitance (1)
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/4 (per gate)
3.3
fIN = 10MHz
VIN = 0 or VCC
37
pF



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