- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384921 > SM560 (Cypress Semiconductor Corp.) Spread Spectrum Clock Generator PDF資料下載
參數(shù)資料
| 型號(hào)： | SM560 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | Spread Spectrum Clock Generator |
| 中文描述： | 擴(kuò)頻時(shí)鐘發(fā)生器 |
| 文件頁(yè)數(shù)： | 6/8頁(yè) |
| 文件大?。?/td> | 246K |
| 代理商： | SM560 |
SM560
Document #: 38-07020 Rev. *E
Page 6 of 8
SM560 Application Schematic
The schematic in
Figure 3
above demonstrates how the
SM560 is configured in a typical application. This application
is using a 40-MHz reference derived from a third overtone
crystal connected to pins 1 and 8. Since Y1 is a third overtone
crystal a notch filter is created with L1 and C3 to dampen the
gain of the oscillator at the fundamental frequency of this
crystal which is 13.33 MHz.
Figure 3
also demonstrates how to properly use the tri-level
logic employed in the SM560. Notice that resistors R2 and R4
create a voltage divider that places V
DD
/2 on pin 7 to satisfy
the voltage requirement for an “M” state.
With this configuration, the SM560 will produce an SSCG
clock that is at a center frequency of 40 MHz. Referring to
Table 2
, range “0, M” at 40 MHz will generate a modulation
profile that has a 1.7% peak to peak spread.
Note:
2.
The value of L1 is calculated such that L1 and C3 are tuned to a frequency that is 130% higher than the fundamental frequency of the crystal.
ZC1 = 1/2
π
fC
ZC1 = 1/6.28 (17.33 MHz) (27 pF)
ZC1 = 340
ZL1 = 2
π
FL
L = ZL1/2
π
f
L = 340/6.28(17.33 MHz)
L = 3.12
μ
H
The ordering part number differs from the marking on the actual device.
3.
VDD
NOTE 1.
VDD
VDD
Y1
40 MHz
L1
3.3 uH.
C3
27 pF
C2
27 pF
C5
22 uF.
C4
.01 uF.
C6
0.1 uF
R4
20 K
R2
20 K
R5
22
Application Load
SM560
Xin/CLK
1
VDD
2
GND
3
SSCLK
4
SSCC
5
S1
6
S0
7
Xout
8
Figure 3. Application Schematic
[2]
Ordering Information
[3]
Part Number
Package Type
Product Flow
IMISM560BZ
IMISM560BZT
Lead Free Devices
CYISM560BSXC
CYISM560BSXCT
8-pin SOIC
8-pin SOIC–Tape and Reel
Commercial, 0
°
to 70
°
C
Commercial, 0
°
to 70
°
C
8-pin SOIC
8-pin SOIC–Tape and Reel
Commercial, 0
°
to 70
°
C
Commercial, 0
°
to 70
°
C
Marking: Example:
IMI
SM560BS
Date Code, Lot#
SM560 B S
Package
S = SOIC
Revision
IMI Device Number
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SMAJ188 | POWER 400WATTS VOLTAGE 5.0 TO 188 VOLTS |
| SMAJ188A | POWER 400WATTS VOLTAGE 5.0 TO 188 VOLTS |
| SMAJ50 | POWER 400WATTS VOLTAGE 5.0 TO 188 VOLTS |
| SMB112 | Five-Channel Digitally Programmable White-LED and TFT/LCD Power Manager |
| SMB113 | Four Channel Programmable DC-DC System Power Manager |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SM5605F | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:LSI for Quartz Crystal Osillationg Module |
| SM5605FA | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:LSI for Quartz Crystal Osillationg Module |
| SM5605FC | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:LSI for Quartz Crystal Osillationg Module |
| SM560A | 制造商:SECOS 制造商全稱:SeCoS Halbleitertechnologie GmbH 功能描述:5.0Amp Schottky Barrier Rectifiers |
| SM560A-E | 制造商:LRC 制造商全稱:Leshan Radio Company 功能描述:Schottky Barrier Rectifiers Reverse Voltage 20 to100V Forward Current 5.0A |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。