OCP
©
DTR-1250-SM-LC/LS-MR
3.3V LC connector SFF Gigabit Ethernet 1300 nm & 1550 nm
Multirate Laser Transceivers
Features
!
Data rate applications from 125 Mbps to 1300 Mbps
!
Compliant with IEEE 802.3z Gigabit Ethernet
1000BASE-LX PMD specifications
!
Distance options of 10 km, 25 km, 40 km and 70 km
!
Eye Safe (Class I Laser Safety)
!
Excellent EMI & ESD protection (optional extra EMI
shield also available)
!
Multi-sourced 10-pin (2x5) SFF (Small Form Factor)
package style
!
-40 °C to +85 °C Operating Temperature (“A” option)
!
Duplex LC optical connector interface
!
Single +3.3 V supply & LV-PECL DATA interface
(AC coupling option also available)
!
LV-TTL TX DISABLE input & RX SIGNAL DETECT
output
Description
The DTR-1250-SM-LC-MR and DTR-1250-SM-LS-MR fiber
optic transceivers offer a simple and convenient way to interface
1000BASE-LX Gigabit Ethernet boards running at 1.25 Gbaud
to single mode and multimode fiber optic cables. The multi-rate
transceiver operates at Fast Ethernet data rate 125 Mbps to
Gigebit Ethernet 1.25 Gbps. In addition to option “L2” for the
5 km distance specified in IEEE 802.3z standard, five other
options with longer distance capability with single mode fibers
are offered. In option “L1”, a 1300 nm Fabry Perot laser with
higher power and narrower spectral width and center
wavelength range is used to increase the distance to at least
10 km. In option “L0”, an even higher power 1300 nm Fabry
Perot laser is used to offer more optical power budget. In option
“H3”, a 1300 nm DFB laser and a high sensitivity receiver are
used to increase the distance to over 25 km or 30 km (assuming
worst case fiber loss of 0.4 dB/km and 0.35 dB/km respectively).
In option “H5”, a 1550 nm DFB laser and a high sensitivity
receiver are used to increase the distance to over 35 km or
40 km (assuming worst case fiber loss of 0.3 and 0.25 dB/km
respectively). Finally, in option “H7”, a high power 1550 nm
DFB laser and an ultra high sensitivity receiver are used to
increase the distance to 70 km (assuming fiber loss of 0.2 to
0.25 dB/km). All modules satisfy Class I Laser Safety
requirements in accordance with the US FDA/CDRH and
international IEC-825 standards.
The transmit and receive functions are contained in a narrow
width two-row, 10-pin (2x5) package with a Duplex LC
connector interface. The receptacle fits into an RJ-45 form
factor outline. The 10-pin configuration is in conformance to
a Small Form Factor (SFF) multisource agreement.
The transmitter and receiver DATA interface are differential
direct-coupled LV-PECL. An alternate version with
AC coupling interface is also available. An LV-TTL Transmitter
Disable control input is provided. The receiver Signal Detect
output interface is also LV-TTL.
The transceiver operates from a single +3.3V power supply
over an operating temperature range of -5 °C to +70 °C and
-40 °C to +85 °C (“A” option). The package is made of metal for
excellent EMI shielding.
Symbol
T
st
Minimum
- 40
- 40
- 5.0
0
0
-
-
Maximum
+ 85
+ 85
+ 70
+ 5.0
V
CC
50
260°C, 10 sec
21737-0337, Rev. A
5-16-2002
Absolute Maximum Ratings
Parameter
Storage Temperature
Operating Case Temperature
Supply Voltage
Input Voltage
Output Current
Lead Soldering Temperature & Time
"A" option
"Blank" option
Units
°C
°C
V
V
mA
T
op
V
CC
V
in
I
O
-
Optical Communication Products, Inc.
1
DTR-1250-SM-LC/LS-MR
Transmitter Electrical Interface
Parameter
Input HIGH Voltage
1
Input LOW Voltage
1
Transmitter Disable Voltage
Transmitter Enable Voltage
1
(over Operating Case Temperature Range)
Symbol
V
IH
V
IL
V
DIS
V
EN
Minimum
V
CC
- 1.165
V
CC
- 1.950
V
CC
- 1.3
0
Typical
-
-
-
-
Maximum
V
CC
- 0.700
V
CC
- 1.475
V
CC
0.8
Units
V
V
V
V
For AC-coupled modules, the input voltage swing is 0.25 V minimum and 1.2 V maximum single-ended.
Receiver Electrical Interface
(over Operating Case Temperature Range)
Parameter
Output HIGH Voltage (LV-PECL)
1,2
Output LOW Voltage (LV-PECL)
1,2
Output HIGH Voltage (LV-TTL)
Output LOW Voltage (LV-TTL)
Symbol
V
OH
V
OL
V
OH
V
OL
Minimum
V
CC
- 1.10
V
CC
- 1.84
2.4
0
Typical
-
-
-
-
Maximum
V
CC
- 0.90
V
CC
- 1.60
V
CC
0.8
mA
Units
V
V
I
O
Output Current
-
-
25
1
With 50 ohm terminated to
V
CC
- 2 volt (for DC-coupled modules).
2
For AC-coupled modules, the output voltage swing into 50-ohm load is 0.3 V minimum and 1 V maximum single-ended.
Electrical Power Supply Characteristics
(over Operating Case Temperature Range)
Parameter
Supply Voltage
Supply Current
1
1
Symbol
V
CC
Minimum
3.13
-
-
Typical
3.3
150
175
Maximum
3.47
220
245
Units
V
mA
mA
DC-coupled module
AC-coupled module
I
CC
I
CC
Supply current does not include termination.
+3.3 volt
1
µ
H coil or
ferrite inductor
0.1
1
µ
H coil or
ferrite inductor
+
+
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 50 ohm termination.
DATA interface (AC-coupled modules):
For modules with AC coupling option, both
transmitter and receiver interface has internal
bias, termination and AC coupling capacitor.
The transmitter can be connected directly to
the driving SERDES as shown in Fig. 2. The
receiver can be connected directly to the
external 50 ohm loads (termination resistor
of the SERDES). For best performance, both
DATA+ & DATA- should be used.
TX DISABLE:
The transmitter is normally
enabled (i.e. when the TX DISABLE control
input is not connected or at LV-TTL logic
LOW). When the TX DISABLE voltage is
higher than
V
CC
- 1.3 V, the laser is turned off
independent of the input data.
SIGNAL DETECT:
The Signal Detect
circuit monitors the level of the incoming
optical signal and generates a logic LOW
signal when insufficient photocurrent is
produced. Its output is LV-TTL with no
termination required.
21737-0337, Rev. A
5-16-2002
Capacitor values in
µ
F, Resistor values in ohm
10
0.1
160
160
6
0.1
2
9
100
10
TXD+
50 ohm line
50 ohm line
50 ohm line
50 ohm line
100
LV-PECL
10
TXD -
RXD+
LV-PECL
TX DISABLE
SIGNAL DETECT
8
3
7
5
4
GND
POSTS
RXD -
1
160
160
Fig.1 DC-coupled modules
+3.3 volt
1
µ
H coil or
ferrite inductor
0.1
1
µ
H coil or
ferrite inductor
+
+
Capacitor values in
µ
F, Resistor values in ohm
depending on SERDES
10
0.1
160
6
0.1
10
RXD+
8
3
7
5
RXD -
50 ohm line
GND
POSTS
160
2
100
50 ohm line
9
TXD+
TXD -
50 ohm line
10
50 ohm line
100
SERDES
TX DISABLE
SIGNAL DETECT
4
1
depending on SERDES
Fig.2 AC-coupled modules
2
DTR-1250-SM-LC/LS-MR
Transmitter Performance Characteristics
(over Operating Case Temperature,
V
CC
= 3.13
Parameter
Data Rate
Symbol
B
Minimum
Typical
Maximum
to 3.47 V)
Units
125
1250
1300
Mb/s
L2
- 11.0
-
- 3.0
L1
- 9.0
-
- 3.0
1
P
o
Optical Output Power
L0
- 5.0
-
0
dBm
H3, H5
- 4.0
-
1.0
H7
- 3.0
-
2.0
L2
1270
1310
1355
L1, L0 (-5°C to 70°C)
1285
1310
1345
λ
c
Center Wavelength
nm
L1, L0 (-40°C to 85°C)
1274
1310
1360
H3
1280
1310
1335
H5, H7
1480
1550
1580
L2
-
-
4.0
∆λ
RMS
Spectral Width (RMS)
1
L1, L0
-
-
2.5
nm
∆λ
20
Spectral Width (-20 dB)
H3, H5, H7
-
-
1.0
P
hi
/ P
lo
9
-
-
dB
Extinction Ratio
DJ
Deterministic Jitter
-
-
80
ps
RJ
Random Jitter
-
-
147
ps
RIN
Relative Intensity Noise
-
-
- 120
dB/Hz
Transmitter Output Eye
compliant with Eye Mask Defined in IEEE 802.3z standard
1
Measured average power coupled into single mode fiber (SMF). For 50
µm
or 62.5
µm
multimode fiber (MMF) operation, the output power is
0.5 dB less and is measured after a single mode fiber offset-launch mode-conditioning patch cord as specified in IEEE 802.3z .
Receiver Performance Characteristics
(over Operating CaseTemperature,
V
CC
= 3.13
Parameter
Data Rate
Minimum Input Optical Power
(10
-12
BER)
1
Maximum Input Optical Power (10
-12
BER)
1
L2, L1, L0
Signal Detect
Thresholds
Increasing
Light Input
Decreasing Light Input
Signal Detect Hysteresis
Deterministic Jitter
Random Jitter
Wavelength of Operation
Return Loss
Electrical 3 dB upper cutoff frequency
Stressed Receiver Sensitivity
1
to 3.47 V)
Units
Mb/s
dBm
dBm
dBm
dBm
dB
ps
ps
nm
dB
MHz
Symbol
B
L2, L1, L0
H3, H5
H7
P
min
P
max
H3, H5
H7
P
sd-
-
DJ
RJ
λ
-
-
P
sd+
Minimum
125
- 20.0
- 21.0
- 23.0
- 3.0
-
-
-
- 30.0
0.5
-
-
1100
12
-
Typical
1250
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Maximum
1300
-
-
-
-
- 20.0
- 21.0
- 23.0
-
-
170
96
1600
-
1500
compliant with IEEE 802.3z standard
Measured with 2
7
-1 PRBS at 1250 Mb/s and 125 Mb/s at 1300 nm wavelength.
Power supply and grounding:
The power supply line should
be well-filtered. All 0.1
µF
power supply bypass capacitors
should be as close to the DTR transceiver module as possible.
The two front GND posts (mounting studs) should be
grounded to Chassis Ground for best EMI and ESD protection.
If Chassis Ground is not available, they should be tied to
Circuit Ground.
Transmission distance:
The transmission distances
indicated for the H3, H5 and H7 modules with DFB laser
options are guidelines only, not guaranteed. The exact
distance is dependent on the particular fiber loss involved
and can be calculated from the optical loss budget.
3
21737-0337, Rev. A
5-16-2002
DTR-1250-SM-LC/LS-MR
Package without
EMI shield (LC)
13.56
.534
TX
6.25
.246
48.44
1.907
10.54
.415
RX
9.35
.368
9.78MAX
.385MAX
0.38
.015
*y
*x
0.46
.018
1.02
.040
18.54
.730
2X
2X
2.54
.100
10
10.16
.400
1
13.11
.516
1.91
.075
1.78
.070
0.76
.030
17.78
.700
Dimension in inches [mm]
Package with
EMI Shield (LS)
13.56
.534
48.44
1.907
10.54
.415
6.25
.246
4.1
.16
9.78MAX
.385MAX
9.65
.380
11
.43
0.38
.015
*y
*X
0.46
.018
2X
1.02
.040
18.54
.730
2.54
2X
.100
10
10.16
.400
1
13.41
.528
14.8
.58
1.91
.075
1.78
.070
0.76
.030
17.78
.700
Dimension in inches [mm]
Notes:
1. Default tolerance for all dimensions given in inches (Unless otherwise noted)
.xxx = +0.005
.xx = +0.01
2. *x, *y: see Pin length option table in ordering information
21737-0337, Rev. A
5-16-2002
4
DTR-1250-SM-LC/LS-MR
Pin Assignments
PIN
1
2
3
4
5
6
7
8
9
10
FUNCTION
RX GND
V
CC
RX
SD (RX SIGNAL DETECT)
RD- (RX DATA OUT -)
RD+ (RX DATA OUT +)
V
CC
TX
TX GND
TX DISABLE
TD+ (TX DATA IN +)
TD- (TX DATA IN -)
Laser Safety:
All transmitters are Class I Laser products
per FDA/CDRH and IEC-825 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
Ordering Information
DTR-1250 - SM -
WW
-
T - Xn
-
YY
- Mp
- MR
see Pin Length
option table
Package Types
LC: Package without Shield
LS: Package With Shield
Temperature Range
“Blank”: -5 °C to 70 °C
“A”: -40 °C to 85 °C
Coupling option
“Blank”: DC coupling
AC : AC coupling
Pin Length option table
Light Output Power
L2:
L1:
L0:
H3:
H5:
H7:
-7dBm (typ.), (5km)
-6dBm (typ.), (10km)
-3dBm (typ.), (10km)
-1dBm (typ.), (25 km w/ 1300 nm DFB laser)
-2dBm (typ.), (40 km w/ 1550 nm DFB laser)
-1dBm (typ.), (70 km w/ 1550 nm DFB laser)
Options
(P)
M
Pin Length (x)
Inches
0.140 + 0.010
Millimeters
3.56 + 0.250
Post Length (y)
Inches
Millimeters
0.125
+ 0.010
- 0.005
0.155
+ 0.010
- 0.005
0.180 + 0.010
3.17
+ 0.250
- 0.125
3.94
+ 0.250
- 0.125
4.57 + 0.250
M5
M8
0.155 + 0.010
0.180 + 0.010
3.94 + 0.250
4.57 + 0.250
Note:
1. When “A” option is required for H5 and H7 power output, it is only available over temperature range of -25°C to +70 °C.
2. These are target distances to be used for classification and not for specification.
Optical Communication Products, Inc.
20961 Knapp Street, Chatsworth, CA 91311, Tel.: 818-701-0164, FAX: 818-701-1468, http://www.ocp-inc.com
Optical Communication Products, Inc. reserves the right to make changes in equipment design or specifications without notice. Information supplied by Optical Communication
Products, Inc. is believed to be accurate and reliable. However, no responsibility is assumed by Optical Communication Products, 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 Optical Communication Products, Inc.
5
21737-0337, Rev. A
5-16-2002
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