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參數(shù)資料
| 型號(hào)： | I2781A-08TT |
| 元件分類： | 時(shí)鐘產(chǎn)生/分配 |
| 英文描述： | 78 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封裝： | TSSOP-8 |
| 文件頁(yè)數(shù)： | 4/11頁(yè) |
| 文件大小： | 169K |
| 代理商： | I2781A-08TT |
July 2005
P2781/82/84
rev 1.5
General Purpose EMI Reduction IC
2 of 11
Notice: The information in this document is subject to change without notice.
Pin Configuration
Pin Description (P278XA)
Pin#
Pin Name
Type
Description
1
XIN/CLKIN
I
Connect to crystal or clock input. This pin has dual functions. It can be connected
either to an external crystal or an external reference clock.
2
XOUT
O
Crystal connection. If using an external reference, this pin must be left
unconnected.
3
FS1
I
Digital logic input used to select input frequency range
(see the Input Frequency Selection Table). This pin has an internal pull-up
resistor.
4
LF
I
External Loop Filter for the PLL. By changing the value of the CRC circuit, the
percentage spread can be adjusted accordingly. See the Loop Filter Selection
Table for detail value.
5
VSS
I
Ground Connection. Connect to system ground.
6
ModOUT
O
Spread Spectrum Clock Output.
7
FS0
I
Digital logic input used to select input frequency range
(see the Input Frequency Selection Table). This pin has an internal pull-up
resistor.
8
VDD
P
Connect to +3.3 V
Input Frequency Selection Table
Output Frequency Scaling (MHz)
FS1
FS0
Input (MHz)
P2781A
P2782A
P2784A
Modulation Rate (KHz)
0
3 to 9
6 to 18
12 to 36
Fin / 128
0
1
10 to 19
20 to 38
40 to 76
Fin / 256
1
0
20 to 38
40 to 76
80 to 152
Fin / 512
1
39 to 78
78 to 156
156 to 312
Fin / 1024
1
2
3
4
8
7
6
5
XIN / CLKIN
XOUT
FS1
LF
VDD
FS0
ModOUT
VSS
P278XA-08S
P278XA-08T
Standard pin Configuration offered in both
8 pin SOIC and TSSOP Packages
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| I2781A-08TR | 78 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| I2782A-08SR | 156 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| I2782A-08ST | 156 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| I2782A-08TR | 156 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| I74F50729D-T | F/FAST SERIES, DUAL POSITIVE EDGE TRIGGERED D FLIP-FLOP, COMPLEMENTARY OUTPUT, PDSO14 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| I2781AF-08SR | 制造商:PULSECORE 制造商全稱:PulseCore Semiconductor 功能描述:General Purpose EMI Reduction IC |
| I2781AF-08ST | 制造商:PULSECORE 制造商全稱:PulseCore Semiconductor 功能描述:General Purpose EMI Reduction IC |
| I2781AF-08TR | 制造商:PULSECORE 制造商全稱:PulseCore Semiconductor 功能描述:General Purpose EMI Reduction IC |
| I2781AF-08TT | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:General Purpose EMI Reduction IC |
| I2781AG-08SR | 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 3-78MHZ 3.3V 1X GP EMI RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
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