(Cisco P/N GLC-SX-MMD= ) - 1000BASE-SX SFP transceiver module, MMF, 850nm, DOM 24069680SFP550

P/N: 24069680SFP550

1.25Gbps SFP Optical Transceiver, 550M Reach

Features

 Data-rate of 1.25Gbps operation

 850nm VCSEL laser and PIN photodetector

 Compliant with SFP MSA and SFF-8472 with duplex LC receptacle  Digital Diagnostic Monitoring:

Internal Calibration or External Calibration 

 500m transmission with 50/125µm MMF

 300m transmission with 62.5/125µm MMF 

 Compatible with RoHS

 +3.3V single power supply

 Operating case temperature:

Standard : 0 to +70°C ES8512-3LCD05

Applications

 Gigabit Ethernet

 Fiber Channel

 Switch to Switch interface

 Switched backplane applications

 Router/Server interface

 Other optical transmission systems

Description

The SFP transceivers are high performance, cost effective modules supporting data-rate of 1.25Gbps and 550m transmission distance with MMF.

The transceiver consists of three sections: a VCSEL laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.

The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472. For further information, please refer to SFP MSA.

Module Block Diagram

Absolute Maximum Ratings

Electrical Characteristics (TOP=0to70℃,VCC=3.15to3.60Volts)

Notes:

1. Connected directly to TX data input pins. AC coupled thereafter.

2. Or open circuit.

3. Into 100 ohms differential termination.

4. 20 – 80 %

5. Loss Of Signal is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.

6. Receiver sensitivity is compliant with power supply sinusoidal modulation of 20 Hz to 1.5 MHz up to specified value

applied through the recommended power supply filtering network.

Optical Characteristics (TOP=0to70℃,VCC=3.15to3.60Volts)

Notes:

1. Class 1 Laser Safety per FDA/CDRH and IEC-825-1 regulations.

2. With worst-case extinction ratio. Measured with a PRBS 27-1 test pattern, @1.25Gb/s, BER<10-12 .

3. Jitter added by receiver (peak to peak). Measured at –18.0dBm average Rx sensitivity, PRBS 27-1 test pattern.

Pin Descriptions

Notes:

1. Circuit ground is internally isolated from chassis ground.

if intended for use. Pull up voltage should be between 2.0V to Vcc + 0.3V. A high output indicates a transmitter fault

caused by either the TX bias current or the TX output power exceeding the preset alarm thresholds. A low output

indicates normal operation. In the low state, the output is pulled to <0.8V.

4. Should be pulled up with 4.7k - 10kohms on host board to a voltage between 2.0V and 3.6V. MOD_DEF(0) pulls line

low to indicate module is plugged in.

5. LOS is open collector output. Should be pulled up with 4.7k – 10 kohms on host board to a voltage between 2.0V

and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.

Pin Definitions

Pin Diagram

Pinout of Connector Block on Host Board

Digital Diagnostic Functions The ES8512-3LCD05 transceivers support the 2-wire serial communication protocol as defined in the SFP MSA1. It is very closely related to the EEPROM defined in the GBIC standard, with the same electrical specifications. The standard SFP serial ID provides access to identification information that describes the transceiver’s capabilities, standard interfaces, manufacturer, and other information. 

Additionally, the SFP transceivers provide a unique 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 defines a sophisticated system of alarm and warning flags, which alerts end-users when particular operating parameters are outside of a factory set normal range. 

 The SFP MSA defines a 256-byte memory map in EEPROM that is accessible over a 2-wire serial interface at the 8 bit address 1010000X (A0h). The digital diagnostic monitoring interface makes use of the 8 bit address 1010001X (A2h), so the originally defined serial ID memory map remains unchanged. The interface is identical to, and is thus fully backward compatible with both the GBIC Specification 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 E2PROM 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. Digital diagnostics for the ES8512-3LCD05 are Internally calibrated by default.

Regulatory Compliance

Certification:  IEEE 802.3ae 10GBASE-LR ;SFF-8431 ;ROHS;Class A, CE, CE-mark