參數(shù)資料
型號： CD4047BDMS
廠商： INTERSIL CORP
元件分類： 諧振器
英文描述： 4000/14000/40000 SERIES, MONOSTABLE MULTIVIBRATOR, CDIP14
封裝： DIP-14
文件頁數(shù)： 5/15頁
文件大?。?/td> 127K
代理商： CD4047BDMS
7-909
CD4047BMS
FIGURE 28. TYPICAL POWER DISSIPATION vs OUTPUT FREQUENCY (VDD = 15V)
Typical Performance Characteristics (Continued)
ASTABLE MODE
SUPPLY VOLTAGE (VDD) = 15V
POWER
DISSIP
A
TION
(PD)
(
W)
105
104
103
102
10-1
100
101
102
103
104
105
106
Q OR Q FREQUENCY (F) (Hz)
C = 0.1
F
C = 0.01
F
C =1000pF
C =100pF
C =10pF
Astable Mode Design Information
Unit-to-Unit Transfer Voltage Variations
The following analysis presents variations from unit to unit as
a function of transfer voltage (VTR) shift (33%-67% VDD) for
free running (astable) operation.
FIGURE 29. ASTABLE MODE WAVEFORMS
thus if
is used, the variation will be +5%, -0%
due to variations in transfer voltage.
Variations Due to VDD and Temperature Changes
In addition to variations from unit to unit, the astable period
varies with VDD and temperature, Typical variations are pre-
sented in graphical form in Figures 11 to 18 with 10V as ref-
erence for voltage variations curves and +25oC as reference
for temperature variations curves.
t1 = -RC In
VTR
;
VDD + VTR
typically, t1 = 1.1RC
t2 = -RC In
VDD - VTR
;
2VDD - VTR
typically, t2 = 1.1RC
tA = 2(t1 + t2)
= -2RC In
(VTR)(VDD - VTR)
(VDD + VTR)(2VDD - VTR)
Typ:
Min:
Max:
VTR = 0.5VDD
VTR = 0.33VDD
VTR = 0.67VDD
tA = 4.40RC
tA = 4.62RC
t1
t2
t1
t2
tA/2
tA
TERMINAL 13
TERMINAL 10
tA = 4.40RC
Monostable Mode Design Information
The following analysis presents variations from unit to unit as a
function of transfer voltage (VTR) shift (33% - 67% VDD) for
one shot (monostable) operation.
FIGURE 30. MONOSTABLE WAVEFORMS
thus if
is used, the variation will be +9.3%,
-0% due to variations in transfer voltage.
NOTES:
1. In the astable mode, the rst positive half cycle has a duration of
tM; succeeding durations are tA/s.
2. In addition to variations from unit to unit, the monostable pulse
width varies with VDD and temperature. These variations are
presented in graphical form in Figures 19 to 26 with 10V as ref-
erence for voltage variation curves and +25oC as reference for
temperature variation curves.
t1 = -RC In
VTR
;
2VDD
typically, t1 = 1.38RC
tM = (t1 + t2)
tM = -RC In
(VTR)(VDD - VTR)
(2VDD - VTR)(2VDD)
where tM = Monostable mode pulse width.
Values for tM are as follows:
Typ:
Min:
Max:
VTR = 0.5VDD
VTR = 0.33VDD
VTR = 0.67VDD
tM = 2.48RC
tM = 2.71RC
tM = 2.48RC
t1
t2
t1
t2
tM
TERMINAL 13
TERMINAL 10
TERMINAL 8
tM = 2.48RC
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