OCP
DTR-2488-SM2-LC/LS-W-G-CWDM
OC-48/STM-16 2x10 SFF Single Mode CWDM Transceivers
Features
Eight (8) Wavelength CWDM Transceivers
Compliant with SONET/SDH OC-48/STM-16
IR-2/S-16.2 & LR-2/L-16.2 Specifications
Eye Safe (Class I Laser Safety)
Multi-sourced 2x10 Package Style
Duplex LC Optical Interface
Differential Bias Monitor Voltage & Back Facet
Monitor Voltage Outputs
Receiver Power Monitor Output
AC Coupling or DC Coupling Option to LV-PECL
DATA Compatible Interface
LV-TTL SIGNAL DETECT Output
Single +3.3V Power Supply
Description
The DTR-2488-SM2-LC/LS-W-G-CWDM SFF series of fiber
optic transceivers provide a quick and reliable interface for
intermediate reach (IR-2) and long reach (LR-2) applications.
Products under this series are compliant with SONET/SDH
OC-48/STM-16 (2.488Gb/s) standards for IR-2/S-16.2
intermediate reach and LR-2/L-16.2 long reach applications
,and are available in eight (8) wavelengths: 1470nm, 1490nm,
1510nm, 1530nm, 1550nm, 1570nm, 1590nm and 1610nm. Two
performance options are available. In option L0, a guaranteed
minimum optical power of -5dBm is offered with a PIN receiver
that corresponds to a link distance of 15km (assuming fiber loss
of 0.25dB/km). In option HP, a guaranteed minimum optical
power of -2dBm is offered with an APD receiver that corresponds
to a link distance of 80km (assuming fiber loss of 0.25dB/km). All
modules satisfy Class I Laser Safety requirements in accordance
with the U.S. FDA/CDRH and international IEC-60825 standards.
The transmit and receive functions are contained in a narrow
width two-row, 20-pin (2x10) package with a duplex LC optical
interface. The receptacle fits into an RJ-45 form factor outline.
The 20-pin configuration is in conformance to the SFF MSA.
The transmitter design incorporates all the necessary control
and driver circuitry for converting differential data to light.
The receiver uses an InGaAs/InP PIN photodiode for IR-2
applications and an APD photodiode for LR-2 applications to
covert the light signal into an electrical current which is
amplified and regenerated into differential data outputs. AC-
coupled transmit and receive DATA interface is recommended
for compatibility with LV-PECL signal levels. An option for
DC-coupled interface is also available. LV-TTL SIGNAL
DETECT function which indicates loss of optical input is
also provided.
The transceivers operate from a single +3.3V power supply
over an operating case temperature range of -5°C to +70°C.
The package is made of metal for excellent EMI immunity.
Absolute Maximum Ratings
Parameter
Storage Temperature
Operating Case Temperature
Maximum Input Optical Power (LR-2 only, 60 seconds max.)
Supply Voltage
Input Voltage
Output Current
Lead Soldering Temperature & Time
Symbol
T
st
T
op
P
in, max
V
CC
V
in
I
O
-
Minimum
- 40
-5
-
0
0
-
-
Maximum
+ 85
+ 70
+ 3.0
+ 5.0
V
CC
50
Units
°C
°C
dBm
V
V
mA
260°C, 10 seconds
Optical Communication Products, Inc.
1
21737-0266, Rev. D
07-06-2005
DTR-2488-SM2-LC/LS-W-G-CWDM
Transmitter Performance Characteristics
(over Operating Case Temperature Range,
V
CC
= 3.13 to 3.47V)
All parameters guaranteed only at typical data rate
Parameter
Operating Data Rate
1
Average Optical Output Power
(coupled into single mode fiber)
50% duty cycle
Extinction Ratio
L0
HP
1470
1490
1510
Center Wavelength
1530
1550
1570
1590
1610
Spectral Width (-20dB)
Side Mode Suppression Ratio
Dispersion Penalty
IR-2
LR-2
2
∆λ
20
SMSR
-
λ
c
P
o
P
hi
/P
lo
Symbol
B
Minimum
-
- 5.0
- 2.0
8.2
1464
1484
1504
1524
1544
1564
1584
1604
-
30
-
-
Typical
2.488
- 2.0
0
-
1470
1490
1510
1530
1550
1570
1590
1610
-
-
-
-
Maximum
-
0
+ 3.0
-
1477.5
1497.5
1517.5
1537.5
1557.5
1577.5
1597.5
1617.5
1.0
-
1.0
2.0
nm
dB
dB
nm
dB
Units
Gb/s
dBm
1
Optical Output Eye
Compliant with Telcordia GR-253-CORE and ITU-T Recommendation G.957
Data rate ranges from 155Mb/s to 2.7Gb/s. However, some degradation may be incurred in overall performance.
2
Specified at 1600ps/nm dispersion, which corresponds to the approximate worse-case dispersion for 80km G.652/G.654 fiber over the
wavelength range of 1464 -1617.5nm.
Receiver Performance Characteristics
Parameter
Operating Data Rate
1
Receiver Sensitivity (10
-10
BER)
2
Maximum Input Optical Power
(10
-10
BER)
2
SIGNAL DETECT
Thresholds
SIGNAL DETECT Timing
SIGNAL DETECT Hysteresis
Wavelength of Operation
Jitter Tolerance & Transfer Function
1
2
(over Operating Case Temperature Range,
V
CC
= 3.13 to 3.47V)
All parameters guaranteed only at typical data rate
Symbol
B
IR-2
LR-2
IR-2
LR-2
Increasing Light input
Decreasing Light Input
Increasing Light input
Decreasing Light Input
P
min
P
max
P
sd+
P
sd-
P
sd+
P
sd-
-
-
λ
Minimum
-
- 19.0
- 29.0
0
- 8.0
-
- 42.0
-
- 42.0
3.0
0.5
1260
Typical
2.488
-
- 31.0
+ 1.0
-
-
-
-
-
-
1.0
-
Maximum
-
-
-
-
-
- 19.0
-
- 29.0
-
100
-
1620
µs
dB
nm
dBm
Units
Gb/s
dBm
dBm
IR-2
LR-2
Compliant with ITU Recommendation G.958
Data rate ranges from 155Mb/s to 2.7Gb/s. However, some degradation may be incurred in overall performance.
Specified in average input optical power and measured at 2.488Gb/s and 1550nm with 2
23
-1 PRBS.
Laser Safety:
All transmitters are Class I Laser products
per FDA/CDRH and IEC-60825 standards. They must
be operated under specified operating conditions.
Optical Communication Products, Inc.
DATE OF MANUFACTURE:
MANUFACTURED IN THE USA
This product complies with
21 CFR 1040.10 and 1040.11
Meets Class I Laser Safety Requirements
2
21737-0266, Rev. D
07-06-2005
DTR-2488-SM2-LC/LS-W-G-CWDM
Transmitter Electrical Interface
(over Operating Case Temperature Range,
V
CC
= 3.13 to 3.47V)
Parameter
Input Voltage Swing between DATA+ & DATA-
Input Impedance
Transmitter Disable Voltage
Transmitter Enable Voltage
Differential Bias Monitor Voltage (T
a
= 25°C)
Differential Back Facet Monitor Voltage
Symbol
V
INDIF
Z
IL
V
DIS
V
EN
V
BM+
- V
BM-
V
FM+
- V
FM-
Minimum
0.30
-
V
CC
- 1.3
0
0.10
-
Typical
0.80
50
-
-
-
30
Maximum
1.60
-
V
CC
0.8
0.70
-
Units
V
P-P
Ω
V
V
V
mV
Receiver Electrical Interface
(over Operating Case Temperature Range,
V
CC
= 3.13 to 3.47V)
Parameter
Output Voltage Swing
1,2
Output Current
Output HIGH Voltage (LV-TTL)
Output LOW Voltage (LV-TTL)
Receiver Power Monitor Current
1
2
3
Symbol
V
p-p
I
O
V
OH
V
OL
I
RPM
Minimum
0.3
-
2.0
0
0.6
Typical
-
-
-
-
0.85
Maximum
0.8
25
V
CC
0.4
1.3
Units
V
mA
V
V
µΑ/µW
Single ended into 50Ω load.
DC-coupled version is also available (50Ω to
V
CC
- 2V termination) with output HIGH voltage level of
V
CC
- 1.10V min. and
V
CC
- 0.90V max.
The output LOW voltage (LV-PECL) is
V
CC
- 1.84V min. and
V
CC
- 1.60V max.
3
Power input, RPM is specified from -29dBm to -17dBm for APD and 0dBm to -19dBm for PIN.
Electrical Power Supply Characteristics
(over Operating Case Temperature Range,
V
CC
= 3.13 to 3.47V)
Parameter
Supply Voltage
Supply Current
1
1
Symbol
V
CC
I
CC
Minimum
3.13
-
Typical
3.3
195
Maximum
3.47
310
Units
V
mA
Supply current does not include termination resistor current for DC-coupled version.
Pin Assignments
PIN
1
2
3
4
5
6
7
8
9
FUNCTION
RPM (Reciever Power Monitor)
RX GND
RX GND
N/C
N/C
RX GND
V
CC
RX
SD (RX SIGNAL DETECT)
RD- ( RX DATA OUT-)
PIN
11 V
CC
TX
12
13
14
15
16
17
18
19
20
TX GND
TX DISABLE
FUNCTION
Laser Bias & Laser Back Facet Monitor Circuits
VCC
LD
I
b
BM+
3kΩ
10Ω
3kΩ
BM-
VCC
PD
3kΩ
I
mon
200Ω
3kΩ
FM-
Control
Circuit
FM+
TD+ (TX DATA IN+)
TD- (TX DATA IN-)
TX GND
BM- (BIAS MONITOR-)
BM+ (BIAS MONITOR +)
Bias
Circuit
GND
FM- (FACET MONITOR-)
FM+ (FACET MONITOR+)
10 RD+ ( RX DATA OUT+)
GND
LD Bias
Monitor Circuit
LD Back Facet
Monitor Circuit
3
21737-0266, Rev. D
07-06-2005
DTR-2488-SM2-LC/LS-W-G-CWDM
Receiver Power Monitor option 1
Vcc
+3.3V
1
µ
H coil or
ferrite inductor
0.1
+
Fig.1 DC-coupled modules
Capacitor values in
µ
F, Resistor values in
Ω
Vcc
10
0.1
160
160
DTR-2488
External resistor
1
µ
H coil or
+
ferrite inductor
11
7
1
14
TD+
50
Ω
line
50
Ω
line
50
Ω
line
50
Ω
line
100
LV-PECL
10
SIGNAL DETECT
0.1
8
100
15
TD-
LV-PECL
DTR-2488-SM2
1
10
RD+
806Ω
Recommended external current
monitor resistor value is 1kΩ
RPM
(see Power Monitor Options)
9
GND
2,3,6 POSTS 12,16
RD-
160
160
chassis
ground
Receiver Power Monitor option 2
Vcc
+3.3V
Vcc
1
µ
H coil or
ferrite inductor
0.1
+
Fig.2 AC-coupled modules
Capacitor values in
µ
F, Resistor values in
Ω
depends on SERDES
10
0.1
160
160
DTR-2488
R1
1
AD8551 or
equivalent
R1
1
µ
H coil or
7
11
14
TD+
50
Ω
line
50
Ω
line
50
Ω
line
50
Ω
line
100
2N3906 or
equivalent
+
ferrite inductor
10
0.1
100
15
TD-
8
DTR-2488-SM2
RPM
R2
SIGNAL DETECT
10
RD+
SERDES
806Ω
R1: 510
Ω
R2: 2k
Ω
recommended
1
RPM
(see Power Monitor Options)
9
RD-
GND
2,3,6 POSTS 12,16
depends on SERDES
chassis
ground
Application Notes
DATA interface (DC-coupled modules):
The interface
circuit for standard DC-coupled modules with direct-coupled
LV-PECL interface is shown in Fig. 1. The transmitter input
has internal 50Ω termination.
DATA interface (AC-coupled modules):
For modules with
AC coupling option, both transmitter and receiver interfaces
have internal bias, 50Ω termination and AC coupling capacitors.
The transmitter can be connected directly to the driving
SERDES as shown in Fig. 2. The receiver can be connected
directly to the external 50Ω loads (termination resistor of the
SERDES). For best performance, both DATA+ & DATA-
should be used.
SIGNAL DETECT:
The SIGNAL DETECT circuit monitors
the incoming optical signal level and generates a logic LOW
signal when an insufficient photocurrent is produced. The output
is LV-TTL with no termination required.
TX DISABLE:
The transmitter is normally enabled (i.e. when
the TX DISABLE control input is not connected). When the
TX DISABLE control input voltage is higher than
V
CC
- 1.3V,
the laser is turned off independent of the input data.
Power supply and grounding:
The power supply line should
be well-filtered. All 0.1µF power supply bypass capacitors
should be as close to the DTR transceiver module as possible.
The module case ground is internally AC-coupled to the circuit
ground.
4
21737-0266, Rev. D
07-06-2005
DTR-2488-SM2-LC/LS-W-G-CWDM
Package without
EMI Shield (LC)
[13.56 MAX]
.535 MAX
TX
48.39
1.905
10.49
.413
RX
13.11
.516
6.25
.246
9.35
.37
[9.78 MAX]
.385 MAX
0.38
.015 TYP
(X)*
0.25
2x .010
(Y)*
PIN 11
1.02
2X .040
2X
2.54
.100
10.16
.400
*(x) & (y): See Pin Length
Option Table in Ordering
Information
PIN 1
1.78
.070 TYP
8.89
.350
18.54
.730
1.91
2X .075
PIN 10
[0.46]
.018
Dimensions in inches [mm]
Default tolerances:
.xxx = + .005”, .xx = + .01”
Package with
EMI Shield (LS)
[13.56 MAX]
.535 MAX
48.39
1.905
10.49
.413
RX
TX
3.5
.14
6.25
.246
[11]
.43
[9.78 MAX]
.385 MAX
9.65
.38
0.38
.015 TYP
(X)*
0.25
2X .010
PIN 11
1.02
2X .040
(Y)*
2.54
2X .100
10.16
.400
[13.59 +0/-0.254]
.535 +0/-.01
15.6
.62
*(x) & (y): See Pin Length
Option Table in Ordering
Information
Dimensions in inches [mm]
Default tolerances:
.xxx = + .005”, .xx = + .01”
1.91
2X .075
PIN 10
[0.46]
0.18
PIN 1
1.78
.070 TYP
8.89
.350
18.54
.730
5
21737-0266, Rev. D
07-06-2005
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