SFP-10GD-LR MRV [MRV Communications, Inc.], SFP-10GD-LR Datasheet - Page 4

• Manufacturer Part Number: SFP-10GD-LR
• Description: 10 Gbps 10 km Single-Mode SFP+ Transceiver
• Manufacturer: MRV [MRV Communications, Inc.]

Datasheet
Digital Diagnostics Functions
MRV’s SFP-10GD-LR SFP+ transceivers support the 2-wire serial communication protocol as defi ned in the SFF-8472. It is very closely
related to the E
The standard SFP serial ID provides access to identifi cation information that describes the transceiver’s capabilities, standard interfaces,
manufacturer, and other information.
Additionally, MRV’s SFP+ transceivers provide a enhanced digital diagnostic monitoring interface, which allows real-time access to
device operating parameters such as transceiver temperature, laser bias current, transmitted optical power, received optical power
and transceiver supply voltage. It also defi nes a sophisticated system of alarm and warning fl ags, which alerts end-users when
particular operating parameters are outside of a factory set normal range.
The SFP MSA defi nes a 256-byte memory map in E
(A0h). The digital diagnostic monitoring interface makes use of the 8 bit address 1010001X (A2h), so the originally defi ned serial ID
memory map remains unchanged. The interface is identical to, and is thus fully backward compatible with both the GBIC Specifi cation
and the SFP Multi Source Agreement.
The operating and diagnostics information is monitored and reported by a Digital Diagnostics Transceiver Controller (DDTC) inside
the transceiver, which is accessed through a 2-wire serial interface. When the serial protocol is activated, the serial clock signal (SCL,
Mod Def 1) is generated by the host. The positive edge clocks data into the SFP transceiver into those segments of the E
that are not write-protected. The negative edge clocks data from the SFP transceiver. The serial data signal (SDA, Mod Def 2) is bi-
directional for serial data transfer. The host uses SDA in conjunction with SCL to mark the start and end of serial protocol activation.
The memories are organized as a series of 8-bit data words that can be addressed individually or sequentially.
For more information, please see the SFP MSA documentation.
SFP-10GD-LR transceivers can be used in host systems that require either internally or externally calibrated digital diagnostics.
Notes:
Digital Diagnostics Specifi cations
Parameter
Accuracy
Internally Measured Transceiver Temperature
Internally Measured Transceiver Supply Voltage
Measured TX Bias Current
Measured TX Output Power
Measured RX Received Average Optical Power
Dynamic Range for Rated Accuracy
Internally Measured Transceiver Temperature
Internally Measured Transceiver Supply Voltage
Measured TX Bias Current
Measured TX Output Power
Measured RX Received Average Optical Power
Max Reporting Range
Internally Measured Transceiver Temperature
Internally Measured Transceiver Supply Voltage
Measured TX Bias Current
Measured TX Output Power
Measured RX Received Average Optical Power
1.
2
PROM defi ned in the GBIC standard, with the same electrical specifi cations.
Accuracy of Measured Tx Bias Current is 10% of the actual Bias Current from the laser driver to the laser.
Δ DD
DD
DD
Δ DD
Δ DD
Δ DD
DD
DD
DD
DD
DD
DD
Symbol
Δ DD
2
Temperature
Temperature
DD
DD
PROM that is accessible over a 2-wire serial interface at the 8 bit address 1010000X
Temperature
Rx-Power
Tx-Power
Rx-Power
Tx-Power
Voltage
Voltage
Rx-Power
Tx-Power
Voltage
Bias
Bias
Bias
4
-14.2
Min
-8.2
-40
-10
-22
3.1
2.8
-5
0
0
-
-
-
-
-
Typical
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Max
TBD
125
3.5
0.5
0.5
4.0
+2
+2
10
70
20
3
3
2
2
Unit
dBm
dBm
dBm
dBm
mA
mA
dB
dB
ºC
%
%
ºC
ºC
V
V
Note
2
PROM
1
-
-
-
-
-
-
-
-
-
-
-
-
-
-