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74LCX16244 数据表(PDF) 8 Page - STMicroelectronics

部件名 74LCX16244
功能描述  Low voltage CMOS 16-bit bus buffer (3-state) with 5V tolerant inputs and outputs
PDF  15 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

74LCX16244 数据表(HTML) 8 Page - STMicroelectronics

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Electrical characteristics
74LCX16244
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
5.2
ns
3.0 to 3.6
1.5
4.5
tPZL tPZH
Output enable
time
2.7
50
500
2.5
1.5
6.3
ns
3.0 to 3.6
1.5
5.5
tPLZ tPHZ
Output disable
time
2.7
50
500
2.5
1.5
5.7
ns
3.0 to 3.6
1.5
5.4
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
8pF
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
20
pF



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