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CD74HCT257MT Scheda tecnica(PDF) 5 Page - Texas Instruments

Il numero della parte CD74HCT257MT
Spiegazioni elettronici  High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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CD74HCT257MT Scheda tecnica(HTML) 5 Page - Texas Instruments

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Switching Specifications Input tr, tf = 6ns
PARAMETER
SYMBOL
TEST
CONDITIONS
VCC (V)
25oC
-40oC TO 85oC
-55oC TO 125oC
UNITS
TYP
MAX
MAX
MAX
HC TYPES
Propagation Delay
In to Y
tPLH, tPHL
CL = 50pF
2
-
150
190
225
ns
4.5
-
30
38
45
ns
CL = 15pF
5
12
-
-
-
ns
CL = 50pF
6
-
26
33
38
ns
Propagation Delay
S to Y
tPLH, tPHL
CL = 50pF
2
-
175
220
265
ns
4.5
-
35
44
53
ns
CL = 15pF
5
14
-
-
-
ns
CL = 50pF
6
-
30
37
45
ns
Propagation Delay
OE to Y
tPLZ, tPHZ,
tPZL, tPZH
CL = 50pF
2
-
150
190
225
ns
CL = 50pF
4.5
-
30
38
45
ns
CL = 15pF
5
12
-
-
-
ns
CL = 50pF
6
-
26
33
38
ns
Output Transition Times
tTLH, tTHL
CL = 50pF
2
-
60
75
90
ns
4.5
-
12
15
18
ns
6
-
10
13
15
ns
Input Capacitance
CI
--
-
10
10
10
pF
Three-State Output
Capacitance
CO
--
-
20
20
20
pF
Power Dissipation
Capacitance
(Notes 3, 4)
CPD
-
5
45
-
-
-
pF
HCT TYPES
Propagation Delay
In to Y
tPLH, tPHL
CL = 50pF
4.5
-
33
41
50
ns
CL = 15pF
5
13
-
-
-
ns
Propagation Delay
S to Y
tPZL, tPZH
CL = 50pF
4.5
-
38
48
57
ns
CL = 15pF
5
12
-
-
-
ns
Propagation Delay
OE to Y
tPLZ, tPHZ
CL = 50pF
4.5
-
30
38
45
ns
CL = 15pF
5
16
-
-
-
ns
Output Transition Times
tTLH, tTHL
CL = 50pF
4.5
-
12
15
18
ns
Input Capacitance
CI
--
-
10
10
10
pF
Three-State Output
Capacitance
CO
--
-
20
20
20
pF
Power Dissipation
Capacitance
(Notes 3, 4)
CPD
-
5
45
-
-
-
pF
NOTES:
3. CPD is used to determine the dynamic power consumption, per multiplexer.
4. PD = VCC
2 f
i (CPD + CL) where fi = Input Frequency, CL = Output Load Capacitance, VCC = Supply Voltage.
CD54HC257, CD74HC257, CD54HCT257, CD74HCT257


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