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CD74HCT242 Datasheet(Fiches technique) 5 Page - Texas Instruments

Numéro de pièce CD74HCT242
Description  High Speed CMOS Logic Quad-Bus Transceiver with Three-State Outputs
Télécharger  7 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
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5
Switching Specifications Input tr, tf = 6ns
PARAMETER
SYMBOL
TEST
CONDITIONS
VCC (V)
25oC
-40oC TO 85oC
-55oCTO125oC
UNITS
TYP
MAX
MAX
MAX
HC TYPES
Propagation Delay Data
to Outputs (HC243)
tPLH, tPHL
CL = 50pF
2
-
90
115
135
ns
4.5
-
18
23
27
ns
CL = 15pF
5
7
-
-
-
ns
CL = 50pF
6
-
15
20
23
ns
Output High-Z, to High Level
to Low Level
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 High Level,
Output Low Level to High-Z
tPHZ, tPLZ
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 (HC243)
(Notes 5, 6)
CPD
-
5
80
-
-
-
pF
HCT TYPES
Propagation Delay Data to
Outputs (HCT242)
tPLH, tPHL
CL = 50pF
4.5
-
20
25
30
ns
CL = 15pF
5
8
-
-
-
ns
Propagation Delay Data to
Outputs (HCT243)
tPLH, tPHL
CL = 50pF
4.5
-
22
28
33
ns
CL = 15pF
5
9
-
-
-
ns
Output High-Z to High Level
to Low Level
tPZH, tPZL
CL = 50pF
4.5
-
34
43
51
ns
CL = 15pF
5
14
-
-
-
ns
Output High Level,
Output Low Level to High-Z
tPHZ, tPLZ
CL = 50pF
4.5
-
35
44
53
ns
CL = 15pF
5
14
-
-
-
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 5, 6)
CPD
HCT242
5
90
-
-
-
pF
HCT243
5
91
-
-
-
pF
NOTES:
5. CPD is used to determine the dynamic power consumption, per channel.
6. PD = VCC
2 f
i (CPD + CL) where fi = Input Frequency, fO = Output Frequency, CL = Output Load Capacitance, VCC = Supply Voltage.
CD74HCT242, CD74HC243, CD74HCT243




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