- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄361073 > N555 (Texas Instruments, Inc.) PRECISION TIMERS PDF資料下載
參數(shù)資料
| 型號： | N555 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | PRECISION TIMERS |
| 中文描述： | 精密定時器 |
| 文件頁數(shù)： | 13/24頁 |
| 文件大?。?/td> | 356K |
| 代理商： | N555 |
www.ti.com
Pulse-Width Modulation
The operation of the timer can be modified by modulating the internal threshold and trigger voltages, which is
accomplished by applying an external voltage (or current) to CONT.
Figure 18
shows a circuit for pulse-width
modulation. A continuous input pulse train triggers the monostable circuit, and a control signal modulates the
threshold voltage.
Figure 19
shows the resulting output pulse-width modulation. While a sine-wave modulation
signal is shown, any wave shape could be used.
THRES
GND
1
C
R
A
R
L
V
CC
(5 V to 15 V)
Output
DISCH
OUT
V
CC
RESET
TRIG
CONT
Modulation
Input
(see Note A)
Clock
Input
NOTE A: The modulating signal can be direct or capacitively coupled
to CONT. For direct coupling, the effects of modulation source
voltage and impedance on the bias of the timer should be
considered.
4
8
3
7
6
2
5
Pin numbers shown are for the D, JG, P, PS, and PW packages.
V
Time 0.5 ms/div
Capacitor Voltage
Output Voltage
Clock Input Voltage
R
A
= 3 k
C = 0.02
μ
F
R
L
= 1 k
See Figure 18
Modulation Input Voltage
NA555, NE555, SA555, SE555
PRECISION TIMERS
SLFS022F–SEPTEMBER 1973–REVISED JUNE 2006
APPLICATION INFORMATION (continued)
Figure 18. Circuit for Pulse-Width Modulation
Figure 19. Pulse-Width-Modulation Waveforms
13
Submit Documentation Feedback
相關PDF資料 |
PDF描述 |
|---|---|
| N8T14 | TRIPLE LINE RECEIVERS |
| N8T26AB | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
| N8T26AF | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
| N8T28B | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
| N8T28F | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| N556KYG20DC-30R | 制造商:Legacy Electronics Inc 功能描述:512MB PC2-5300 CL5 DIMM - Bulk |
| N-55M | 功能描述:電源變壓器 115V 250VA MED ISO RoHS:否 制造商:Triad Magnetics 功率額定值:12 VA 初級電壓額定值:115 V / 230 V 次級電壓額定值:12 V / 24 V 安裝風格:SMD/SMT 一次繞組:Dual Primary Winding 二次繞組:Dual Secondary Winding 長度:2.5 in 寬度:2 in 高度:1.062 in |
| N-55MG | 功能描述:電源變壓器 115V 250VA MED ISO W/ GROUND WIRE RoHS:否 制造商:Triad Magnetics 功率額定值:12 VA 初級電壓額定值:115 V / 230 V 次級電壓額定值:12 V / 24 V 安裝風格:SMD/SMT 一次繞組:Dual Primary Winding 二次繞組:Dual Secondary Winding 長度:2.5 in 寬度:2 in 高度:1.062 in |
| N5601 | 制造商:MPSIND 制造商全稱:MPS Industries, Inc. 功能描述:GIGABIT RJ-45 JACK WITH MAGNETIC MODULE |
| N5606 | 制造商:MPSIND 制造商全稱:MPS Industries, Inc. 功能描述:1000BASE-T SINGLE PORT RJ-45 JACK WITH MAGNETIC MODULE |
發(fā)布緊急采購，3分鐘左右您將得到回復。