1.25G CSFP Transceiver (WT-CSFP-135/53-20km)

model：

Dual channel Compact (Option2) SFP, LC, +3.3V, 20km 1310 FP, 1550nm DFB-LD, Single-Mode, DDM

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Description Technical parameters Applications Download Related Products

Features

l 1250Mbps Typical Data Rate and compliant to 1000Base BX20 IEEE802.3ah

l 1310nm FP laser transmitter for UCFP-135

1550nm DFB laser transmitter for UCFP-153

l PIN photo-detector

l Up to 20km on 9/125µm SMF

l Hot-pluggable CSFP footprint

l LC/UPC type pluggable optical interface

l Achieve operational compatibility with conventional SFP

l Metal enclosure, for lower EMI

l RoHS compliant and lead-free

l Single +3.3V power supply

l Support Digital Diagnostic Monitoring interface

l Compliant with SFF-8472

l Case operating temperature: Industrial / Commercial optional, 0°C to +70°C / -40°C to +85°C

Applications

l Gigabit Ethernet(1000BASE-BX20)

l Point to Point FTTH Application

l Switched Backplane Applications

l Router/Server Interface

l Switch to Switch Interface

Description

The WT-CSFP-135/53 CSFP transceivers are compatible with the Compact Small Form- Factor Pluggable (CSFP) Multi-Source Agreement (MSA) option 2, The transceiver consists of 2-channel Bi-directional Optical Transceiver unit with five sections: the LD driver, the limiting amplifier, the digital diagnostic monitor, the 1310nm FP laser (the 1550nm DFB laser) and the PIN photo-detector .The module data link up to 20KM in 9/125um single mode fiber.

The optical output can be disabled by a TTL logic high-level input of Tx Disable, and the system also can disable the module via I2C. Tx Fault is provided to indicate that degradation of the laser. Loss of signal (LOS) output is provided to indicate the loss of an input optical signal of receiver or the link status with partner. The system can also get the LOS (or Link)/Disable/Fault information via I2C register access.

Conventional SFP will function when plugged into a C-SFP socket, at the same time no damage to C-SFP and host board if C-SFP module is plugged into a conventional SFP socket

Mechanical Specifications (Unit: mm)

Label： SFP

Electrical Interface Characteristics

Parameter	Symbol		Min.		Typ.	Max.	Unit	Note
*Transmitter*
Total Supply Current		ICC				A	mA	Note (1)
Transmitter Disable Input-High		VDISH		2		Vcc+0.3	V
Transmitter Disable Input-Low		VDISL		0		0.8	V
Transmitter Fault Input-High		VTxFH		2		Vcc+0.3	V
Transmitter Fault Input-Low		VTxFL		0		0.8	V
*Receiver*
Total Supply Current		ICC				B	mA	Note (1)
LOSS Output Voltage-High		VLOSH		2		Vcc+0.3	V	LVTTL
LOSS Output Voltage-Low		VLOSL		0		0.8	V

Note (1): A (TX) + B (RX) = 450mA (Not include termination circuit)

For detail, please check the datasheet in "Download".