FTCS-8528G-02DI 28.05Gbps SFP28 SR Transceiver 850nm 100m MMF LC Industrial

28.05Gbps SFP28 Transceiver, Multi Mode, 100m Reach
FTCS-8528G-02DI

Product Features

Supports up to 28.05Gbps bit rates
Hot-pluggable SFP+ footprint
850nm VCSEL laser and PIN photodiode
100m over M5F MMF (50/125 um OM4)
70m over M5E MMF (50/125um OM3)
20m on MMF (50/125um OM2)
Compliant with SFP+ MSA and SFF-8472 with duplex LC receptacle
Compatible with RoHS
Single +3.3V power supply
Real Time Digital Diagnostic Monitoring
Operating case temperature:

Standard: -40 to +85°C

Applications

Tri-Rate 8.5/14.025/28.05 Gb/s Fibre Channel

Description

The SFP28 transceivers are high performance, cost effective modules supporting data rate of 28.05Gbps over multimode fiber.

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 and SFF-8472 digital diagnostics functions.

Temp

Vcc

LD Bias

Tx Power

Rx Power

TD+/-

TxFault

TxDis

LOS

RD+/-

POWER

SCL

SDA

LD Driver

PIN+TIA

Post Amp

I2C Controller

EEPROM

ADC/DAC

Transceiver functional diagram

Absolute Maximum Ratings

Parameter	Symbol	Min	Max	Unit
Supply Voltage	Vcc	-0.5	4	V
Storage Temperature	Ts	-40	+85	°C
Operating Humidity	–	5	85	%

Recommended Operating Conditions

Parameter	Symbol	Min	Typical	Max	Unit
Operating Case Temperature	Tc	-40		+850	°C
Power Supply Voltage	Vcc	3.135	3.30	3.465	V
Power Supply Current	Icc			300	mA
Data Rate			28.05		Gbps

Optical and Electrical Characteristics

Parameter		Symbol	Min	Typical	Max	Unit	Notes
Transmitter
Centre Wavelength		λc	840	850	860	nm
Spectral Width（RMS）		Δλ			0.57	nm
Side-Mode Suppression Ratio		SMSR	–	–	–	dB
Average Output Power		P_out	-6.2		2	dBm	1
Extinction Ratio		ER	2.0			dB
Data Input Swing Differential		V_IN	180		950	mV	2
Input Differential Impedance		Z_IN	90	100	110	Ω
TX Disable	Disable		2.0		Vcc	V
TX Disable	Enable		0		0.8	V
TX Fault	Fault		2.0		Vcc	V
TX Fault	Normal		0		0.8	V
Receiver
Centre Wavelength		λc	840	850	860	nm
Receiver Sensitivity		SEN			-10.2	dBm	3
Receiver Overload			2			dBm	3
LOS De-Assert		LOS_D			-13	dBm
LOS Assert		LOS_A	-30			dBm
LOS Hysteresis			0.5		4	dB
Data Output Swing Differential		V_out	500		900	mV	4
LOS		High	2.0		Vcc	V
LOS		Low			0.8	V

Notes:

1. The optical power is launched into MMF.

2. PECL input, internally AC-coupled and terminated.

3. For 32GFC with FEC, receiver sensitivity is defined at 1E-6 BER level, not 1E-12 BER level.

4. Internally AC-coupled.

Timing and Electrical

Parameter	Symbol	Min	Typical	Max	Unit
Tx Disable Negate Time	t_on			2	ms
Tx Disable Assert Time	t_off			100	µs
Time To Initialize, including Reset of Tx Fault	t_init			300	ms
Tx Fault Assert Time	t_fault			100	µs
Tx Disable To Reset	t_reset	10			µs
LOS Assert Time	t_loss_on			100	µs
LOS De-assert Time	t_loss_off			100	µs
Serial ID Clock Rate	f_serial_clock		100	400	KHz
MOD_DEF (0:2)-High	V_H	2		Vcc	V
MOD_DEF (0:2)-Low	V_L			0.8	V

Diagnostics

Parameter	Range	Unit	Accuracy	Calibration
Temperature	0 to +70	°C	±3°C	Internal
Voltage	3.0 to 3.6	V	±3%	Internal
Bias Current	0 to 15	mA	±10%	Internal
TX Power	-6.2 to 2	dBm	±3dB	Internal
RX Power	-12 to 2	dBm	±3dB	Internal

Digital Diagnostic Memory Map

The transceivers provide serial ID memory contents and diagnostic information about the present operating conditions by the 2-wire serial interface (SCL, SDA).

The diagnostic information with internal calibration or external calibration all are implemented, including received power monitoring, transmitted power monitoring, bias current monitoring, supply voltage monitoring and temperature monitoring.

The digital diagnostic memory map specific data field defines as following.

Pin Descriptions

Pin	Signal Name	Description	Plug Seq.	Notes
1	V_EET	Transmitter Ground	1
2	TX FAULT	Transmitter Fault Indication	3	Note 1
3	TXDISABLE	Transmitter Disable	3	Note 2
4	SDA	SDA Serial Data Signal	3
5	SCL	SCL Serial Clock Signal	3
6	MOD_ABS	Module Absent. Grounded within the module	3
7	RS0	Not Connected	3
8	LOS	Loss of Signal	3	Note 3
9	RS1	Not Connected	3
10	V_EER	Receiver ground	1
11	V_EER	Receiver ground	1
12	RD-	Inv. Received Data Out	3	Note 4
13	RD+	Received Data Out	3	Note 4
14	V_EER	Receiver ground	1
15	V_CCR	Receiver Power Supply	2
16	V_CCT	Transmitter Power Supply	2
17	V_EET	Transmitter Ground	1
18	TD+	Transmit Data In	3	Note 5
19	TD-	Inv. Transmit Data In	3	Note 5
20	V_EET	Transmitter Ground	1

Notes:

Plug Seq.: Pin engagement sequence during hot plugging.

1) TX Fault is an open collector output, which should be pulled up with a 4.7k~10kΩ resistor on the host board to a voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; Logic 1 indicates a laser fault of some kind. In the low state, the output will be pulled to less than 0.8V.

2) Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.

3) LOS is open collector output. Should be pulled up with 4.7k~10kΩ on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.

4) RD-/+: These are the differential receiver outputs. They are internally AC-coupled 100 differential lines which should be terminated with 100Ω (differential) at the user SERDES.

5) TD-/+: These are the differential transmitter inputs. They are internally AC-coupled, differential lines with 100Ω differential termination inside the module.

Recommended Interface Circuit

Mechanical Dimensions

Ordering information

Part Number

Product Description

FTCS-8528G-02DI

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FTCS-8528G-02DI 28.05Gbps SFP28 SR Transceiver 850nm 100m MMF LC Industrial

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