Page 1
RoHS compliant
850 nm Multi-mode Transceiver
Small Form Pluggable (SFP), 3.3V
1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet
Features
Compliant with Fiber Channel 100-M5-SN-I and
100-M6-SN-I standard
Compliant with IEEE802.3z Gigabit Ethernet
standard
Industry standard small form pluggable (SFP)
package
Duplex LC connector
Differential LVPECL inputs and outputs
Single power supply 3.3V
TTL signal detect indicator
Hot Pluggable
Class 1 laser product complies with EN 60825-1
Application
Distributed multi-processing
Switch to switch interface
High speed I/O for file server
Bus extension application
Channel extender, data storage
Ordering Information
PART NUMBER INPUT/OUTPUT SIGNAL DETECT VOLTAGE TEMPERATURE
LM28-C3S-TC-N AC/AC TTL 3.3V
LM28-C3S-TI-N AC/AC TTL 3.3V
LM28-C3S-TI-N-ER AC/AC TTL 3.3V
0°C to 70 °C
-20°C to 85 °C
-40°C to 85 °C
Page 1 of 9
Version 1.1
Date: 10/30/2006
Headquarters :
12 Shyr Jiann Road, Hsinchu Industrial Park, Hukow,
Hsinchu Hsien,, Taiwan 303
TEL: +886-3-5986799
FAX: +886-3-5986655
Website: www.apacoe.com.tw
Page 2
RoHS compliant
850 nm Multi-mode Transceiver
Small Form Pluggable (SFP), 3.3V
1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet
Absolute Maximum Ratings
PARAMETER SYMBOL MIN MAX UNITS NOTE
Storage Temperature T
Supply Vo ltage Vcc
S
−40
−0.5
85
4.0 V
°
C
Input Voltage VIN
−0.5
Vcc V
Output Current Io --- 50 mA
Operating Current IOP --- 400 mA
Recommended Operating Conditions
PARAMETER SYMBOL MIN MAX UNITS NOTE
°
C
°
C
°
C
LM28-C3S-TC-N
LM28-C3S-TI-N
LM28-C3S-TI-N-ER
Case Operating Temperature TC
0 70
-20 85
-40 85
Supply Voltage Vcc 3.1 3.5 V
Supply Current ITX + I
RX
--- 250 mA
Transmitter Electro-optical Characteristics
Vcc = 3.1 V to 3.5 V, TC = 0
°
PARAMETER SYMBOL MIN TYP. MAX UNITS NOTE
Output Optical Power
µ
(50/125
(62.5/125
m fiber, NA=0.20)
µ
m fiber, NA=0.275)
Extinction Ratio ER 9 --- --- dB
Coupled Power Ratio CPR 9 --- --- dB
C to 70
°
C (-20
°
C to 85
P
out
°
C) (-40
−9.5
°
C to 85
°
C)
--- -4 dBm
Center W avel ength
Spectral Width (RMS)
Rise/Fall Time, (20−80%)
λ
C
∆
λ
--- --- 260 ps
T
r, f
Relative Intensity Noise RIN --- ---
830 850 860 nm
--- --- 0.85 nm
−117
dB/Hz
Total Jitter TJ --- --- 227 ps
Output Eye Compliant with IEEE802.3z
Max. P
Differential Input Voltage V
TX-DISABLE Asserted P
out
Page 2 of 9
Version 1.1
Date: 10/30/2006
--- ---
OFF
0.4 --- 2.0 V
DIFF
−45
dBm
Headquarters :
12 Shyr Jiann Road, Hsinchu Industrial Park, Hukow,
Hsinchu Hsien,, Taiwan 303
TEL: +886-3-5986799
FAX: +886-3-5986655
Website: www.apacoe.com.tw
Page 3
RoHS compliant
850 nm Multi-mode Transceiver
Small Form Pluggable (SFP), 3.3V
1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet
Receiver Electro-optical Characteristics
Vcc = 3.1 V to 3.5 V, TC = 0
PARAMETER SYMBOL MIN TYP. MAX UNITS NOTE
Optical Input Power-maximum P
Optical Input Power-minimum
(Sensitivity)
Operating Center Wavelength
Optical Return Loss ORL 12 --- --- dB
°
C to 70
°
°
C (-40
0 --- --- dBm
IN
--- ---
P
IN
λ
C
C to 85
°
C)
−18
dBm
770 --- 860 nm
BER < 10
BER < 10
−12
−12
Loss of Signal-Asserted PA --- --Loss of Signal-Deasserted PD
Differential Output Voltage V
Data Output Rise, Fall Time
(20−80%)
Receiver Loss of Signal Output
Voltage-Low
Receiver Loss of Signal Output
Voltage-High
DIFF
T
RX_LOS
RX_LOS
−35
0.5 --- 1.2 V
--- --- 0.35 ns
r, f
0 --- 0.5 V
L
2.4 --- VCC V
H
--- --- dBm
−18
dBm
Page 3 of 9
Version 1.1
Date: 10/30/2006
Headquarters :
12 Shyr Jiann Road, Hsinchu Industrial Park, Hukow,
Hsinchu Hsien,, Taiwan 303
TEL: +886-3-5986799
FAX: +886-3-5986655
Website: www.apacoe.com.tw
Page 4
RoHS compliant
850 nm Multi-mode Transceiver
Small Form Pluggable (SFP), 3.3V
1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet
Block Diagram of Transceiver
DATA
DATA/
TX_DISABLE
TX_FAULT
(0)
(1)
(2)
ELECTRICAL SUBASSEMBLY
LD Driver
&
Fault Sense
MOD_DEF
LASER
OPTICAL
SUB-
ASSEMBLIES
DUPLEX SC
RECEPTACLE
DATA
DATA/
RX_LOS
POST-Amp
&
LOS Detect
TOP VIEW (Label side)
RRE-
AMPLIFIER
IC
Photo
Diode
Transmitter Section
The transmitter section consists of a 850 nm VCSEL in an eye safe optical subassembly (OSA) which mates to the fiber cable.
The laser OSA is driven by a LD driver IC which converts differential input LVPECL logic signals into an analog laser driving
current.
TX_DISABLE
The TX_DISABLE signal is high (TTL logic “1”) to turn off the laser output. The laser will turn on when TX_DISABLE is low
(TTL logic “0”).
Receiver Section
The receiver utilizes a MSM detector integrated with a trans-impedance preamplifier in an OSA. This OSA is connected to a
circuit providing post-amplification quantization, and optical signal detection.
Receive Loss (RX_LOS)
The RX_LOS is high (logic “1”) when there is no incoming light from the companion transceiver. This signal is normally used by
the system for the diagnostic purpose. The signal is operated in TTL level.
Page 4 of 9
Version 1.1
Date: 10/30/2006
Headquarters :
12 Shyr Jiann Road, Hsinchu Industrial Park, Hukow,
Hsinchu Hsien,, Taiwan 303
TEL: +886-3-5986799
FAX: +886-3-5986655
Website: www.apacoe.com.tw
Page 5
Dimensions
RoHS compliant
850 nm Multi-mode Transceiver
Small Form Pluggable (SFP), 3.3V
1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet
Page 5 of 9
Version 1.1
Date: 10/30/2006
DIMENSIONS ARE IN MILLIMETERS
ALL DIMENSIONS ARE 0.2mm UNLESS OTHERWISE SPECIFIED
Unit: mm
Headquarters :
12 Shyr Jiann Road, Hsinchu Industrial Park, Hukow,
Hsinchu Hsien,, Taiwan 303
TEL: +886-3-5986799
FAX: +886-3-5986655
Website: www.apacoe.com.tw
Page 6
RoHS compliant
850 nm Multi-mode Transceiver
Small Form Pluggable (SFP), 3.3V
1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet
SFP host board mechanical layout
X
Y
L
S
XY
A
X
A S
1
PIN1
1
X
LA S
LEGEND
1.PADS AND VIAS ARE CHASSIS GROUND
2.THROUGH HOLES, PLATING OPTIONAL
3.HATCHED AREA DENOTES COMPONENT
AND TRACE KEEPOUT(EXCEPT CHASSIS
GROUND)
4.AREA DENOTES COMPONENT KEEPOUT
(TRACES ALLOWED)
DIMENSIONS ARE IN MILLIMETERS
AS
PIN1
B S
AS
B S
AS
B S
Unit: mm
Page 6 of 9
Version 1.1
Date: 10/30/2006
Headquarters :
12 Shyr Jiann Road, Hsinchu Industrial Park, Hukow,
Hsinchu Hsien,, Taiwan 303
TEL: +886-3-5986799
FAX: +886-3-5986655
Website: www.apacoe.com.tw
Page 7
Assembly drawing
RoHS compliant
850 nm Multi-mode Transceiver
Small Form Pluggable (SFP), 3.3V
1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet
1.7±0.9
3.5±0.3
41.73±0.5
PCB
15.0 MAX
CAGE ASSEMBLY
9.8 MAX
11.0 REF.
BEZEL
BELOW PCB
0.4±0.1
15.25±0.1
10.4±0.1
16.25±0.1
MSA-SPECIFIED BEZEL
PCB
Page 7 of 9
Version 1.1
Date: 10/30/2006
DIMENSIONS ARE IN MILLIMETERS
Unit: mm
Headquarters :
12 Shyr Jiann Road, Hsinchu Industrial Park, Hukow,
Hsinchu Hsien,, Taiwan 303
TEL: +886-3-5986799
FAX: +886-3-5986655
Website: www.apacoe.com.tw
Page 8
Pin Assignment
Pin-Out
RoHS compliant
850 nm Multi-mode Transceiver
Small Form Pluggable (SFP), 3.3V
1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet
PIN 11
PIN 10
PIN 20
PIN 1
Pin Signal Name Description
1 T
2 TX_FAULT Transmit Fault
3 TX_DISABLE Transmit Disable
4 MOD_DEF (2) SDA Serial Data Signal
5 MOD_DEF (1) SCL Serial Clock Signal
6 MOD_DEF (0) TTL Low
7 RATE SELECT Open Circuit
8 RX_LOS Receiver Loss of Signal, TTL High, open collector
9 R
10 R
11 R
12
13
14 R
15 V
16 V
17 T
18
19
20 T
Transmit Ground
GND
Receiver Ground
GND
Receiver Ground
GND
Receiver Ground
GND
RX−
RX+
Receiver Ground
GND
Receiver Power Supply
CCR
Transmitter Power Supply
CCT
Transmitter Ground
GND
TX+
TX−
Transmitter Ground
GND
Receive Data Bar, Differential PECL, ac coupled
Receive Data, Differential PECL, ac coupled
Transmit Data, Differential PCEL, ac coupled
Transmit Data Bar, Differential PCEL, ac coupled
Page 8 of 9
Version 1.1
Date: 10/30/2006
Headquarters :
12 Shyr Jiann Road, Hsinchu Industrial Park, Hukow,
Hsinchu Hsien,, Taiwan 303
TEL: +886-3-5986799
FAX: +886-3-5986655
Website: www.apacoe.com.tw
Page 9
RoHS compliant
850 nm Multi-mode Transceiver
Small Form Pluggable (SFP), 3.3V
1.0625Gbd Fiber Channel/1.25 Gigabit Ethernet
Eye Safety Mark
The LM2 series multimode transceiver is a class 1 laser
product. It complies with EN 60825-1 and FDA 21 CFR
1040.10 and 1040.11. In order to meet laser safety
requirements the transceiver shall be operated within the
Absolute Maximum Ratings.
Caution
All adjustments have been done at the factory before
the shipment of the devices. No maintenance and user
serviceable part is required. Tampering with and
modifying the performance of the device will result in
voided product warranty.
Note : All information contained in this document is subject to change without notice.
Required Mark
Class 1 Laser Product
21 CFR 1040.10 and 1040.11
Complies with
Page 9 of 9
Version 1.1
Date: 10/30/2006
Headquarters :
12 Shyr Jiann Road, Hsinchu Industrial Park, Hukow,
Hsinchu Hsien,, Taiwan 303
TEL: +886-3-5986799
FAX: +886-3-5986655
Website: www.apacoe.com.tw
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