XRT91L31IQTR-F Exar Corporation, XRT91L31IQTR-F Datasheet - Page 30

• Manufacturer Part Number: XRT91L31IQTR-F
• Description: SONET SDH - 8 Bit OC12/STM4, OC3/STM1 PHY Transceiver (with Improved Jitter Transfer Used For Loop Timing Applications)
• Manufacturer: Exar Corporation
• Type: Transceiverr

Specifications of XRT91L31IQTR-F

• Input: LVCMOS, LVPECL, LVTTL
• Output: LVCMOS, LVPECL, LVTTL
• Frequency - Max: 77.76MHz
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-FQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

XRT91L31
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
The 622.08 Mbps STS-12/STM-4 or 155.52 Mbps STS-3/STM-1 transmit serial output is avaliable on TXOP/N
pins. The transmit serial output can be AC or DC coupled to an optical module or electrical interface. A
simplified block diagram is shown in
F
N
F
3.8
IGURE
OTE
IGURE
: Some optical modules integrate AC coupling capacitors within the module. AC or DC coupling is largely specific to
system design and optical module of choice.
17. T
16. L
Transmit Serial Output Control
RANSMIT
OOP
STS-12/STM-4
T
STS-3/STM-1
Transceiver
XRT91L31
IMING
S
or
RXDO[7:0]
RXPCLKO
TTLREFCLK
LOOPTIME
ERIAL
TXDI[7:0]
REFCLKP
REFCLKN
TXPCLK_IO
TXOP
TXON
PIO_CTRL
CDRDIS
M
ODE
O
~ ~
UTPUT
U
ENB
SING
Div by 8
ENB
8
Figure
0
1
8
I
I
NTERFACE BLOCK
NTERNAL
Div by
SIPO
155.52MHz
8
622.08/
CMU
17.
PISO
187 Ohm Pull Down Resistors
CDR
DATA
CLK
MUX
30
XRT91L31
OR AN
Optical Module
DATA
CLK
AC-Coupled SFP
E
XTERNAL
Clk
Data
to Retimer
CDR
Retimer
R
ECOVERED
~ ~
XRXCLKIP
XRXCLKIN
TXOP
TXON
RXIP
RXIN
Optical Fiber
C
LOCK
REV. 1.0.2