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74LCX16240TTR Arkusz danych(PDF) 8 Page - STMicroelectronics

Numer części 74LCX16240TTR
Szczegółowy opis  Low voltage CMOS 16-bit bus buffer (3-state) with 5V tolerant inputs and outputs
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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Electrical characteristics
74LCX16240
8/15
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
1.5
5.3
ns
3.0 to 3.6
1.5
4.5
tPZL tPZH Output enable
time
2.7
50
500
2.5
1.5
6.0
ns
3.0 to 3.6
1.5
5.4
tPLZ tPHZ Output disable
time
2.7
50
500
2.5
1.5
5.4
ns
3.0 to 3.6
1.5
5.3
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
7pF
COUT
Output capacitance
3.3
VIN = 0 to VCC
15
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/16 (per circuit)
3.3
fIN = 10MHz
VIN = 0 or VCC
60
pF


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