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Ref: ATGBICS_3CSFP81-C_V2

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Product Datasheet

SFP Module EEPROM Information and Management

The SFP modules implement the 2-wire serial communication protocol as defined in the SFP -8472. The serial

ID information of the SFP modules and Digital Diagnostic Monitor parameters can be accessed through the

I2C interface at address A0h and A2h. The memory is mapped in Table 1. Detailed ID information (A0h) is

listed in Table 2. And the DDM specification at address A2h. For more details of the memory map and byte

definitions, please refer to the SFF-8472, “Digital Diagnostic Monitoring Interface for Optical Transceivers”.

The DDM parameters have been internally calibrated.

Table 1. Digital Diagnostic Memory Map (Specific Data Field Descriptions)

Digital Diagnostic Monitor Characteristics

Data Address

Parameter

Accuracy

Unit

96-97

Transceiver Internal Temperature

±3.0

°C

98-99

VCC3 Internal Supply Voltage

±3.0

%

100-101

Laser Bias Current

±10

%

102-103

Tx Output Power

±3.0

dBm

104-105

Rx Input Power

±3.0

dBm