FIGURE 3." />
參數(shù)資料
型號: XRT8020IL-F
廠商: Exar Corporation
文件頁數(shù): 9/12頁
文件大?。?/td> 0K
描述: IC CLK MULTIPLR LVDS 16QFN
標(biāo)準(zhǔn)包裝: 490
類型: 時(shí)鐘/頻率倍增器
PLL:
主要目的: 以太網(wǎng),SONET/SDH
輸入: 晶體
輸出: LVDS
電路數(shù): 1
比率 - 輸入:輸出: 1:1
差分 - 輸入:輸出: 無/是
頻率 - 最大: 675MHz
電源電壓: 3 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-VQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 16-QFN-EP(4x4)
包裝: 散裝
XRT8020
REV. 1.0.2
650 MHZ CLOCK & CRYSTAL MULTIPLIER WITH LVDS OUTPUTS
5
FIGURE 3. LVDS OUTPUT WAVEFORMS AND TEST CIRCUITS
1.0
CALIBRATION
TABLE 1: FREQUENCY SELECTION TABLE
FS0
PIN 10
FS1
PIN 9
CRYSTAL OR CLOCK
FREQUENCY
INTERNAL
CAPACITOR
MULTIPLY
RATIO
OUTPUT
DIVIDE
OUTPUT
FREQUENCY
1
78.0 MHz Clock
NA
8x
1
624 MHz
0
1
39.0 MHz
12 pF
16x
1
624 MHz
1
0
19.5 MHz
20 pF
32x
1
624 MHz
0
19.5 MHz
20 pF
32x
2
312 MHz
NOTES:
1. Use Parallel Fundamental mode crystal
2. FS0 has an internal 50K
pull-up resistor to VDD
3. FS1 has an internal 50K
pull-down resistor to GND
TABLE 2: POWER-DOWN AND OUTPUT TRI-STATE SELECTION TABLE
PD
PIN 8
OE
PIN 7
STATUS
NOTES:
1
X
Outputs tri-stated and chip Powered-down
1. “X" = Don't care
2. PD and OE have an internal 50K
pull-down resis-
tor to ground.
0
1
Output tri-stated
V
OUT
C
L =5 pF
C
L =5 pF
R
L = 100
OUTP
OUTN
V
OUT
V
CM
OUTP
OUTN
50
50
LDVS Levels Test Circuit
LDVS Switching Test Circuit
OUTP
OUTN
T
R
T
F
80%
20%
80%
20%
0V
VCM (Differential)
LDVS Transition Time Waveform
0V (Differential)
VOUT
50%
t
skew
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