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CD74HC4049 Datasheet(PDF) 4 Page - Texas Instruments

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Part No. CD74HC4049
Description  High-Speed CMOS Logic Hex Buffers, Inverting and Non-Inverting
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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4
Switching Specifications Input tr, tf = 6ns
PARAMETER
SYMBOL
TEST
CONDITIONS
VCC (V)
25oC
–40oC TO
85oC
–55oC TO
125oC
UNITS
MIN
TYP
MAX
MIN
MAX
MIN
MAX
HC TYPES
Propagation Delay,
nA to nY HC4049
nA to nY HC4050
tPLH, tPHL
CL = 50pF
2
-
-
85
-
105
-
130
ns
4.5
-
-
17
-
21
-
26
ns
6
-
-
14
-
18
-
22
ns
CL = 15pF
5
-
6
-
-
-
-
-
ns
Transition Times (Figure 1)
tTLH, tTHL
CL = 50pF
2
-
-
75
-
95
-
110
ns
4.5
-
-
15
-
19
-
22
ns
6
-
-
13
-
16
-
19
ns
Input Capacitance
CI
-
-
-
-
10
-
10
-
10
pF
Power Dissipation Capacitance
(Notes 4, 5)
CPD
-5
-
35
-
-
-
-
-
pF
NOTES:
4. CPD is used to determine the dynamic power consumption, per gate.
5. PD = VCC
2 f
i (CPD + CL) where fi = Input Frequency, CL = Output Load Capacitance, VCC = Supply Voltage.
Test Circuit and Waveform
FIGURE 1. HC AND HCU TRANSITION TIMES AND PROPAGATION DELAY TIMES, COMBINATION LOGIC
tPHL
tPLH
tTHL
tTLH
90%
50%
10%
50%
10%
INVERTING
OUTPUT
INPUT
GND
VCC
tr = 6ns
tf = 6ns
90%
CD74HC4049, CD74HC4050




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