Finisar Corporation – 7-May-16 Rev. B2 Page 1
Product Specification
100m Multirate Parallel MMF 100/128G QSFP28 Optical
Transceiver
FTLC9551SEPM
PRODUCT FEATURES
Hot-pluggable QSFP28 form factor
Supports 103.1Gb/s to 112.2Gb/s
aggregate bit rates
Power dissipation < 3.5W
RoHS-6 compliant
Commercial case temperature range
of 0°C to 70°C
Single 3.3V power supply
Maximum link length of 100m on
OM4 Multimode Fiber (MMF)
4x25Gb/s 850mm VCSEL-based
transmitter
4x25G electrical interface
Single MPO12 receptacle
I2C management interface
APPLICATIONS
100GBASE-SR4 100G Ethernet
128G Fibre Channel
4x28Gb/s Multimode OTN
Finisar’s FTLC9551SEPM 100G QSFP28 transceiver modules are designed for use in
100 Gigabit Ethernet, 128GFC and 4x28G OTN client links over multimode fiber. They
are compliant with the QSFP28 MSA
1
, 128GFC
2
and IEEE 802.3bm 100GBASE-SR4
3
and CAUI-4
3
. Digital diagnostics functions are available via the I2C interface, as
specified by the QSFP28 MSA
1
and Finisar Application Note AN-2142
4
. The transceiver
is RoHS-6 compliant per Directive 2011/65/EU
5
and Finisar Application Note AN-2038
6
.
PRODUCT SELECTION
FTLC9551SEPM
S: 128GFC maximum bit rate (112.2 Gb/s)
E: 4x25G parallel optics
P: Pull tab release
M: MPO receptacle
FTLC9551SEPM Product Specification – May 2016
Finisar Corporation – 7-May-16 Rev. B2 Page 2
I. Pin Descriptions
Figure 1 – QSFP28-compliant 38-pin connector (per SFF-8679)
Pin
Symbol
Name/Description
Notes
1
GND
Ground
1
2
Tx2n
Transmitter Inverted Data Input
3
Tx2p
Transmitter Non-Inverted Data Input
4
GND
Ground
1
5
Tx4n
Transmitter Inverted Data Input
6
Tx4p
Transmitter Non-Inverted Data Input
7
GND
Ground
1
8
ModSelL
Module Select
9
ResetL
Module Reset
10
Vcc Rx
+3.3 V Power supply receiver
11
SCL
2-wire serial interface clock
12
SDA
2-wire serial interface data
13
GND
Ground
1
14
Rx3p
Receiver Non-Inverted Data Output
15
Rx3n
Receiver Inverted Data Output
16
GND
Ground
1
17
Rx1p
Receiver Non-Inverted Data Output
18
Rx1n
Receiver Inverted Data Output
19
GND
Ground
1
20
GND
Ground
1
21
Rx2n
Receiver Inverted Data Output
22
Rx2p
Receiver Non-Inverted Data Output
23
GND
Ground
1
24
Rx4n
Receiver Inverted Data Output
25
Rx4p
Receiver Non-Inverted Data Output
26
GND
Ground
1
27
ModPrsL
Module Present
28
IntL
Interrupt
29
Vcc Tx
+3.3 V Power supply transmitter