參數(shù)資料
型號: XRT8010IL
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: 312MHZ CLOCK & CRYSTAL MULTIPLIER WITH LVDS OUTPUTS
中文描述: ATM/SONET/SDH SUPPORT CIRCUIT, QCC16
封裝: 4 X 4 MM, QFN-16
文件頁數(shù): 1/13頁
文件大?。?/td> 256K
代理商: XRT8010IL
Exar
Corporation 48720 Kato Road, Fremont CA, 94538
(510) 668-7000
FAX (510) 668-7017
www.exar.com
XRT8010
312MHZ CLOCK & CRYSTAL MULTIPLIER WITH LVDS OUTPUTS
NOVEMBER 2003
REV. 1.0.2
DESCRIPTION
The XRT8010 is a monolithic analog phase locked
loop that provides a high frequency LVDS clock
output, using a low frequency crystal or reference
clock. It is designed for SONET/SDH and other low
jitter applications.The high performance of the IC
provides a very low jitter LVDS clock output up to 320
MHz, while operating at 3.3 volts. The XRT8010 has
a selectable 8x or 16x internal multiplier for an
external crystal or signal source. The Output Enable
pin provides a true disconnect for the LVDS output.
The very compact (4 x 4 mm) low inductance
package is ideal for high frequency operation.
APPLICATIONS
Gigabit Ethernet
SONET/SDH
SPI-4 Phase 2
8x or 16x Clock Multiplier for
I
Computer
I
Telecommunications Sytems
FEATURES
156 or 320 MHz Operating Range
Low Output Jitter:
I
0.0009 UI
RMS
typical @ 155.52 MHz, per
Telcordia GR-253-CORE for OC-3.
On Chip Crystal Oscillator Circuit
I
Optimized for 15 to 40 MHz crystals
I
Uses parallel fundamental mode
Selectable 8x or 16x multiplier
Selectable ÷1 or ÷2 LVDS output
LVDS output meets TIA/EIA 644A Specification
(2001)
3.3V Low power CMOS: <80 mW typical
-40°C to +85°C operating temperature
Extremely small 16-lead QFN package
F
IGURE
1. XRT8010 B
LOCK
D
IAGRAM
O
GND
FS1
OE
AGND
PD
AGND
(Crystal)
FS0
AGND
15-40 MHz
Crystal
XTAL1
XTAL2
Oscillator
Circuit &
Input Buffer
VCO
Calibration Logic
Phase
Detector
Charge
Pump
Loop
Filter
VCO
Selectable
÷
1 or
÷
2
Divider
LVDS Output
Feedback Divider
÷
8 or 16
Voltage Reference
&
Bias Generator
R
EXT
10k
AV
DD
AV
DD
OV
DD
+3.3V
12 - 20 pF
12 - 20 pF
XRT8010
OUTP
OUTN
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