OCP
DTR-1250-MM-LC-MR & DTR-1250-MM-LS-MR
3.3V LC connector SFF Multi-Rate Gigabit Ethernet
850 nm VCSEL Transceivers
Features
!
Data rate applications from 125 Mbps to
1300 Mbps
!
Compliant with IEEE 802.3z Gigabit Ethernet
1000BASE-SX specifications
!
275 m distance with 62.5
µm
multimode fiber
!
550 m distance with 50
µm
multimode fiber
!
850 nm VCSEL technology
!
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
!
Duplex LC optical connector interface
!
Single +3.3 V supply & LV-PECL DATA
interface (AC coupling option also available)
©
Description
The DTR-1250-MM-LC-MR and DTR-1250-MM-LS-MR
fiber optic multi-rate transceiver offer a simple and
convenient way to interface 1000BASE-SX Gigabit
Ethernet boards running at 1.25 Gbaud to multimode fiber
optic cables.
The multirate transceiver operates from Fast
Ethernet data rate (125 Mbps) to Gigabit Ethernet data
rate (1250 Mbps).
A high reliability 850 nm wavelength
Vertical Cavity Surface Emitting Laser (VCSEL) is used in
the transmitter. 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
!
LV-TTL TX DISABLE input & RX SIGNAL
DETECT output
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 0°C to +70°C. The
package is made of metal for excellent EMI shielding.
Absolute Maximum Ratings
Parameter
Storage Temperature
Operating Case Temperature
Supply Voltage
Input Voltage
Output Current
Lead Soldering Temperature & Time
Symbol
T
st
T
op
V
CC
V
in
I
O
-
Minimum
- 40
0
- 0.5
- 0.5
-
-
Maximum
+ 85
+ 70
+ 6.0
V
CC
50
Units
°C
°C
V
V
mA
260°C, 10 sec
Optical Communication Products, Inc.
1
21737-0249,Rev.A
5-28-2002
DTR-1250-MM-LC-MR & DTR-1250-MM-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)
Output Current
1
2
Symbol
V
OH
V
OL
V
OH
V
OL
I
O
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
25
Units
V
V
mA
With 50 ohm terminated to
V
CC
- 2 volt (for DC-coupled modules).
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
160
185
Maximum
3.47
200
225
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.
Capacitor values in
µ
F, Resistor values in ohm
10
0.1
160
160
6
0.1
2
50 ohm line
9
TXD+
100
10
RXD+
5
4
RXD -
TXD -
10
50 ohm line
50 ohm line
50 ohm line
LV-PECL
TX DISABLE
SIGNAL DETECT
8
3
7
100
LV-PECL
GND
POSTS
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+
5
RXD -
50 ohm line
3
7
GND
POSTS
160
2
100
50 ohm line
9
TXD+
TXD -
50 ohm line
10
50 ohm line
100
SERDES
TX DISABLE
SIGNAL DETECT
8
4
1
depending on SERDES
Fig.2 AC-coupled modules
21737-0249,Rev.A
5-28-2002
2
DTR-1250-MM-LC-MR & DTR-1250-MM-LS-MR
Transmitter Performance Characteristics
(over Operating Case Temperature,
V
CC
= 3.13
Parameter
Data Rate
Optical Output Power
1
Center Wavelength
Spectral Width (RMS)
Extinction Ratio
Deterministic Jitter
Random Jitter
Relative Intensity Noise
Coupled Power Ratio
Transmitter Output Eye
1
to 3.47 V)
Units
Mb/s
dBm
nm
nm
dB
ps
ps
dB/Hz
dB
Symbol
B
P
o
λ
c
∆λ
RMS
P
hi
/ P
lo
DJ
RJ
RIN
CPR
Minimum
125
- 9.5
820
-
9
-
-
-
9
Typical
1250
-7
-
-
-
-
-
-
-
Maximum
1300
-4
860
0.85
-
80
147
- 117
-
compliant with Eye Mask Defined in 802.3z standard
Measured average power coupled into either 50
µm
or 62.5
µm
multimode fiber (MMF).
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
Signal Detect
Thresholds
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
P
min
P
max
P
sd+
P
sd-
-
DJ
RJ
λ
-
-
Minimum
125
- 17.0
- 3.0
-
- 30.0
0.5
-
-
770
12
-
Typical
1250
-
-
-
-
-
-
-
-
-
-
Maximum
1300
-
-
- 17.0
-
-
170
96
860
-
1500
Increasing Light Input
Decreasing Light Input
Signal Detect Hysteresis
compliant with 802.3z standard
Measured with 2
7
-1 PRBS at 1250 Mb/s and 125 Mb/s at 850 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.
Laser Safety:
All transmitters are Class I Laser products
per FDA/CDRH and IEC-825 standards. They must be
operated under specified operating conditions.
Pin Assignments
PIN
1
2
3
4
5
6
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 -)
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
7
8
9
10
3
21737-0249,Rev.A
5-28-2002
DTR-1250-MM-LC-MR & DTR-1250-MM-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
21737-0249,Rev.A
5-28-2002
4
DTR-1250-MM-LC-MR & DTR-1250-MM-LS-MR
Ordering Information
DTR-1250 - MM -
Lx
-
YY
- Mp
- MR
see Pin Length
option table
Coupling option
Pin Length Option Table
Options
(P)
M
Pin Length (x)
Inches
0.140 + 0.010
Millimeters
3.56 + 0.250
Post Length (y)
Inches
Millimeters
“Blank” : DC coupling
AC : AC coupling
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
Package Types
LC: Package without Shield
LS: Package With Shield
M5
M8
0.155 + 0.010
0.180 + 0.010
3.94 + 0.250
4.57 + 0.250
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
21737-0249,Rev.A
5-28-2002
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