參數(shù)資料
型號: XRT91L32IQ-F
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
中文描述: TRANSCEIVER, PQFP100
封裝: 14 X 20 MM, 2.70 MM HEIGHT, PLASTIC, QFP-100
文件頁數(shù): 6/37頁
文件大?。?/td> 417K
代理商: XRT91L32IQ-F
XRT91L32
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
xr
REV. 1.0.2
4
PIN DESCRIPTIONS
HARDWARE CONTROL
N
AME
L
EVEL
T
YPE
P
IN
D
ESCRIPTION
RESET
LVTTL
I
4
Remote Serial Loopback
Active "High." When this pin is pulled "High" , the internal state
machines are set to their default state.
"Low" = Normal Operation
"High" = Master Hardware Reset ( minimum 100nS)
STS12/STS3
LVTTL
I
97
Data Rate Selection
Selects SONET/SDH transmission and reception speed rate
"Low" = STS-3/STM-1 155.52 Mbps
"High" = STS-12/STM-4 622.08 Mbps
CMUFREQSEL
LVTTL
I
8
Clock Multiplier Unit Reference Frequency Select
This pin is used to select the frequency of the REFCLKP/N or
TTLREFCLK input to the CMU.
"Low" = 77.76 MHz reference clock
"High" = 19.44 MHz reference clock
N
OTE
:
REFCLKP/N or TTLREFCLK input should be generated
from an LVPECL/LVTTL crystal oscillator which has a
frequency accuracy better than 20ppm in order for the
transmitted data rate frequency to have the necessary
accuracy required for SONET systems..
CMU-
FREQSEL
STS12/
STS3
REFCLKP/N
OR
TTLREFCLK
REFERENCE
FREQUENCY
D
ATA
R
ATE
0
0
77.76 MHz
STS-3/STM-1
155.52 Mbps
0
1
77.76 MHz
STS-12/STM-4
622.08 Mbps
1
0
19.44 MHz
STS-3/STM-1
155.52 Mbps
1
1
19.44 MHz
STS-12/STM-4
622.08 Mbps
相關(guān)PDF資料
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