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LMC555CMM bảng dữ liệu(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
tên linh kiện LMC555CMM
Giải thích chi tiết về linh kiện  CMOS Timer
PDF  12 Pages
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LMC555CMM bảng dữ liệu(HTML) 7 Page - National Semiconductor (TI)

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Application Information (Continued)
PULSE POSITION MODULATOR
This application uses the timer connected for astable opera-
tion, as in Figure 10, with a modulating signal again applied
to the control voltage terminal. The pulse position varies with
the modulating signal, since the threshold voltage and hence
the time delay is varied. Figure 11 shows the waveforms
generated for a triangle wave modulation signal.
50% DUTY CYCLE OSCILLATOR
The frequency of oscillation is
f = 1/(1.4 R
CC)
micro SMD Marking Orientation
Top View
00866923
Bumps are numbered counter-clockwise
00866915
VCC = 5V
Top Trace: Modulation 1 V/Div.
TIME = 0.2 ms/Div.
Bottom Trace: Output Voltage 2 V/Div.
RA = 9.1 kΩ
C = 0.01 µF
FIGURE 9. Pulse Width Modulator Waveforms
00866921
FIGURE 10. Pulse Position Modulator
00866916
VCC = 5V
Top Trace: Modulation Input 1 V/Div.
TIME = 0.1 ms/Div.
Bottom Trace: Output Voltage 2 V/Div.
RA = 3.9 kΩ
RB =3kΩ
C = 0.01 µF
FIGURE 11. Pulse Position Modulator Waveforms
00866906
FIGURE 12. 50% Duty Cycle Oscillator
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