OC-48/STM-16 Receiver with Clock
Recovery
SRC48
Product Description
The SRC48 modules are receivers with internal clock recovery designed
to meet or exceed the SONET/SDH optical interface requirements at OC-
48/STM-16 (2.488 Gb/s) data rate. Three performance versions are avail-
able which are fully compliant with Short Reach, Intermediate Reach
and Long Reach specifications at 1300 nm and 1550 nm wavelength.
The receiver for the Short Reach and Intermediate Reach version uses
PIN photodiodes. For the Long Reach version, InGaAs avalanche photo-
diodes (APDs) are used to achieve high sensitivity. The Long Reach re-
ceiver features a low noise GaAs transimpedance IC with AGC capability
to provide an extremely wide dynamic range. A Phase Lock Loop (PLL)
circuit is included to perform the clock recovery function and resam-
pling of the data. Both DATA and CLOCK outputs are differential signals
designed to be AC-coupled into 50 ohm load. A TTL Signal Detect func-
tion which indicates loss of optical input and an analog Received Opti-
cal Power Monitor output ares also provided.
Features
Fully compliant with SONET/SDH OC-48/STM-16
(2.5 Gb/s) specifications
All receiver modules can be operated with a single +5V supply. The op-
erating temperature range is -40°C to +85°C for the Short Reach and
Intermediate Reach version and 0°C to +70°C for the Long Reach ver-
sion. All receivers are housed in a 24-pin dual-in-line metal package
with fiber pigtail (single mode fiber for Long Reach version and 50/125
μm multimode fiber for Short Reach and Intermediate Reach versions).
The fiber pigtail is terminated with ST, FC or SC connector.
Long Reach 1310 nm & 1550 nm as well as
Intermediate Reach and Short Reach
Internal temperature-compensated High
Voltage APD Supply (Long Reach version)
-40°C to +85°C Operating Temperature
(Intermediate Reach and Short Reach)
24-pin DIP metal package
FC, ST, SC-connectorized fiber pigtails
Differential DATA & CLOCK interface
TTL SIGNAL DETECT output
Received Optical Power Monitor function
Single +5 V supply
Absolute Maximum Ratings
Parameter
Symbol
Minimum
Maximum
Units
TST
Storage Temperature
- 40
+ 85
°C
“I”option (“SR”& “IR”only)
“H”option
- 40
+ 85
+ 70
- 5.0
+ 6.0
VCC
Operating Case Temperature
TOP
°C
0
-
Pin, max
VCC
VIN
-
Maximum Optical Input Power (“LR”only)
Supply Voltage
dBm
V
0
0
-
Input Voltage
V
Lead Soldering Temperature & Time
260°C, 10 sec
R3.2009.04.30
An Oplink Company