OC-3/STM-1 Receiver with Clock
Recovery
SRC03 Series
Product Description
The SRC03 is a Receiver Module with internal clock,recovery designed to
meet or exceed the SONET/SDH optical interface requirements at OC-3/
STM-1 (155 Mb/s) data rate. Highly reliable InGaAs/InP PIN photodiodes
are used to cover the entire long wavelength range from 1100 nm to 1550
nm.
The receiver features a low noise GaAs transimpedance IC with AGC ca-
pability to provide an extremely wide dynamic range and high sensitivity.
A Phase Lock Loop (PLL) circuit is included to perform the clock recovery
function and resampling of the data.
The SRC03 receiver can be operated with dual +5 V and - 5 V supply, or
single +5 V supply. The DATA & CLOCK interface signals are differential
PECL while the SIGNAL DETECT outputs have TTL interface.
The SRC03 module operate over an operating temperature range of 0°C
to +70°C (“H” option) or -40°C to +85°C (“ ” option). They are housed in a
20-pin dual-in-line metal package with integral ST, FC or SC connector re-
ceptacle or 50 µm multimode fiber pigtail. The fiber pigtail is terminated
with ST, FC or SC connector.
Related OC-3/STM-1 transmitters & receivers
STX-03-LED: 20-pin LED transmitter
STX-03: 20-pin laser transmitter
SRX-03: 20-pin receiver without clock recovery
SRC-03-S: 24-pin receiver with clock recovery
Features
Full compliance with SONET/SDH OC-3/
STM-1 specifications
Long Reach and Intermediate Reach
Phase-Lock-Loop (PLL) Clock Recovery
- 40°C to +85°C Operating Temperature
(option “I”)
Multi-sourced 20-pin DIP metal package
FC, ST, SC-connectorized fiber pigtails or
Integral FC, SC or ST connector receptacle
PECL DATA & CLOCK interface
TTL SIGNAL DETECT interface
Absolute Maximum Ratings
Parameter
Storage Temperature
Operating Temperature
Operating & Storage Humidity
Supply Voltage
Lead Soldering Temperature & Time
“I” option
“H” option
Symbol
T
ST
T
OP
-
V
CC
-
Minimum
- 40
- 40
0
-
0
-
Maximum
+ 85
+ 85
+ 70
85
+ 6.0
260°C, 10 sec
Units
°C
°C
%
V
R5.2008.06.18
Oplink Communications, Inc.
SRC03 Series
Receiver Electrical Interface
(Over Operating Case Temperature)
Parameter
Supply Voltage
1
Supply Current
Output HIGH Voltage (DATA & CLOCK)
Output LOW Voltage (DATA & CLOCK)
Output HIGH Voltage (SIGNAL DETECT)
Output LOW Voltage (SIGNAL DETECT)
1
Symbol
V
CC
V
PD
I
CC
V
OH
V
OL
V
OH
V
OL
Minimum
4.75
- 10.0
-
V
CC
- 1.20
V
CC
- 2.0
2.7
0
Typical
5.0
- 5.0
85
-
-
-
-
Maximum
5.5
- 2.0
120
V
CC
- 0.70
V
CC
- 1.70
V
CC
0.5
Units
V
V
mA
V
V
V
V
For +5V & - 5V dual supply:
V
CC
= +5V, CASE = GND = 0V and
V
PD
= - 5V.
V
PD
is the photodiode supply voltage only.
I
VPD
can be used for monitoring the signal photocurrent.
For +5V single supply:
V
CC
= +5V,
V
PD
= CASE = GND = 0V.
Receiver Performance Characteristics
(Over Operating Case Temperature)
Parameter
Data Rate
Receiver Sensitivity (10
-10
BER)
1
Maximum Input Optical
Power (10
-10
BER)
1
Signal Detect Thresholds
Signal Detect Hysteresis
Wavelength of Operation
Output Clock Jitter
Jitter Tolerance & Transfer Function
1
Symbol
B
P
min
P
max
P
sd+
P
sd-
λ
CLK
J
Minimum
155
- 34.0
- 6.0
- 3.0
-
- 45.0
-
1100
-
Typical
155.52
- 36.0
0
0
-
-
0.5
-
-
Maximum
156
-
-
-
- 34.0
-
-
1600
0.01
Units
Mb/s
dBm
dBm
dBm
dBm
dB
nm
UIrms
Single Supply
Dual Supply
Increasing Light Input
Decreasing Light Input
compliant with ITU Recommendation G.958
Specified in Average Optical Input Power and measured at 1300 nm wavelength with 2
23
-1 PRBS.
Interface Circuit
10
0.01
1 µH coil or
ferrite inductor
+
+5 volt
10
0.1
SIGNAL
DETECT+
(TTL LEVELS)
SIGNAL
DETECT -
1 µH coil or
ferrite inductor
- 5 volt
10
10
0.01
11
12
82
82
82
82
SRC-03
14
7
9
4
DATA+
DATA-
CLOCK+
CLOCK-
(PECL LEVELS)
(PECL LEVELS)
10 (VPD)
1, 13, 20
5
For single supply operation,
pin 10 is grounded.
6, 8, 15
130
130
130
130
RESISTOR VALUES ARE IN OHM, CAPACITOR VALUES ARE IN µF UNLESS OTHERWISE INDICATED
Oplink Communications, Inc.
2
R5.2008.06.18
SRC03 Series
Application Notes
Receiver Circuit:
The receiver converts the incident optical power to a
photocurrent via a high performance PIN photodiode. The photocurrent
is converted to a voltage signal by a transimpedance amplifier. This
signal is then amplified by additional gain stages and processed through
a shaping filter and a comparator to generate the data to the clock
recovery circuit. The clock recovery circuit uses a Phase Lock Loop (PLL) to
recover the clock from the data and resamples the data to generate clean
and reshaped differential DATAoutputs. Also provided are differential
recovered CLOCK outputs.
Both differential DATA+ and DATA- as well as CLOCK+ and CLOCK- outputs
are open emitter PECL levels requiring termination (50 ohms to
V
CC
- 2
volts or 510 ohms to
GND
is recommended). For optimum performance,
both outputs should be terminated in the same manner, even if only
one is used.
The Signal Detect circuit monitors the level of the incoming optical signal
and generates a logic LOW (TTL) signal when insufficient photocurrent
is produced.
Interface Circuit:
The power supply line should be wellfiltered. The
power supply should be bypassed by 0.01 or 0.1 µF ceramic chip
capacitors placed as close to the receiver module as possible. If the
receiver outputs drive long traces or multiple loads, the use of an ECL
buffer gate to isolate the receiver from transmission line reflections is
recommended.
Pin Assignments (Top View)
DATA & CLOCK Timing Diagram
CASE
N/C
N/C
CLOCK +
CLOCK -
GND
DATA+
GND
DATA -
N/C
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
CASE
N/C
N/C
N/C
N/C
GND
SIGNAL DETECT -
CASE
SIGNAL DETECT+
V
CC
(+5 V)
Set-up
3.0 < t
S
< 3.5 ns
Hold
3.0 < t
H
< 3.3 ns
DATA
CLOCK
N/C: No internal connection
All CASE pins should be grounded
Pigtail Package
The pigtail length from the package edge is
1.0 meter minimum, 1.1 meter typical.
Dimension in inches
Oplink Communications, Inc.
3
R5.2008.06.18
SRC03 Series
SC-receptacled Package
Dimension in inches
FC-receptacled Package
46335 Landing Pkwy Fremont, CA 94538 Tel: (510) 933-7200 Fax: (510) 933-7300 Email: Sales@Oplink.com • www.oplink.com
Dimension in inches
ST Receptacle Package
Laser Safety:
All transceivers
are Class I Laser products per
FDA/CDRH and IEC-60825
standards. They must be oper-
ated under specified operating
conditions.
Oplink
Communications, Inc.
DATE OF MANUFACTURE:
This product complies with 21 CFR
1040.10 and 1040.11
Meets Class I Laser Safety
Requirements
Dimension in inches
Ordering Information
SRC
8
0
3
X
R
1
0
0
0
Supply Voltage
RX only 5V= 8
Receivers
Wavelength Range
1100~1600nm PIN
Temperature Range
-40 ~85˚C= I
0~70˚C= H
Connector Type & Option
Pigtail FC, SD-TTL = PA
Pigtail ST, SD-TTL = PB
Pigtail SC, SD-TTL = P5
Pigtail FC, SD-PECL = PC
Pigtail ST, SD-PECL = PD
Pigtail SC, SD-PECL = P4
Oplink Communications, Inc. reserves the right to make changes in equipment design or specifications without notice. Information supplied by Oplink Commu-
nications, Inc. is believed to be accurate and reliable. However, no responsibility is assumed by Oplink Communications, Inc. for its use nor for any infringements
of third parties, which may result from its use. No license is granted by implication or otherwise under any patent right of Oplink Communications, Inc.
R5.2008.06.18
© 2008, Oplink Communications, Inc.
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