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CD74HCT4538MTE4 数据表(PDF) 8 Page - Texas Instruments

部件名 CD74HCT4538MTE4
功能描述  High-Speed CMOS Logic Dual Retriggerable Precision Monostable Multivibrator
Download  18 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

CD74HCT4538MTE4 数据表(HTML) 8 Page - Texas Instruments

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8
R to Q
tPHL
CL = 50pF
4.5
-
-
40
-
50
-
60
ns
CL = 15pF
5
-
17
-
-
-
-
-
ns
R to QtPLH
CL = 50pF
4.5
-
-
50
-
63
-
75
ns
CL = 15pF
5
-
21
-
-
-
-
-
ns
Output Transition Time
tTLH, tTHL
CL = 50pF
4.5
-
-
15
-
19
-
22
ns
Output Pulse Width
RX = 10k, CX = 0.1µF
τ
CL = 50pF
5
0.63
-
0.77
0.602
0.798
0.595
0.805
ms
Output Pulse Width Match,
Same Package
--
-
-
±1-
-
-
-
-
%
Power Dissipation Capacitance
(Notes 8, 9)
CPD
CL = 15pF
5
-
134
-
-
-
-
-
pF
Input Capacitance
CI
CL = 50pF
-
10
-
10
-
10
-
10
pF
NOTES:
8. CPD is used to determine the dynamic power consumption, per one shot.
9. PD =(CPD +CX)VCC
2 f
i ∑(CL VCC
2 f
O) where fi = input frequency, fO = output frequency, CL = output load capacitance,
CX = external capacitance VCC = supply voltage assuming fi «
Switching Specifications CL = 50pF, Input tr, tf = 6ns, RX = 10KΩ, CX = 0 (Continued)
PARAMETER
SYMBOL
TEST
CONDITIONS
VCC (V)
25oC
-40oC TO
85oC
-55oC TO
125oC
UNITS
MIN
TYP
MAX
MIN
MAX
MIN
MAX
I
τ
--
Test Circuits and Waveforms
FIGURE 6. HC AND HCU TRANSITION TIMES AND PROPAGA-
TION DELAY TIMES, COMBINATION LOGIC
FIGURE 7. HCT 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%
tPHL
tPLH
tTHL
tTLH
2.7V
1.3V
0.3V
1.3V
10%
INVERTING
OUTPUT
INPUT
GND
3V
tr = 6ns
tf = 6ns
90%
CD54HC4538, CD74HC4538, CD54HCT4538, CD74HCT4538


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