Cudy 1.25Gb/s SFP

● 1.25Gb/s SFP, 1310nm FP, SM, 20km, 12.5dB

SM100GSA-20 Copper Small Form Pluggable

(SFP) transceivers are based on the SFP Multi Source Agreement (MSA).

They are compatible with the Gigabit Ethernet and 1000BASE-T standards

as specified in IEEE Std 802.3 . The 1000BASE-T physical layer IC (PHY)

can be accessed via I2C, allowing access to all PHY settings and features.

The 1000BASE-T uses the SFP’s RX_LOS pin for link indication. If pull up

SFP’s TX_DISABLE pin, PHY IC be reset..

Product choice

Product part Number	Link Indicator on RX_LOS Pin	Support 1000base-X	Support SGMII
SFP-1000BASE-T	Yes	Yes(default)	Yes
SFP-1000BASE-T-SGMII	Yes	No	Yes

SFP to Host Connector Pin Out

Pin	Symbol	Name/Description	Ref
1	VEET	Transmitter Ground (Common with Receiver Ground)	1
2	TFAULT	Transmitter Fault. Not supported.
3	TDIS	Transmitter Disable. Laser output disabled on high or open.	2
4	MOD_DEF(2)	Module Definition 2. Data line for Serial ID.	3
5	MOD_DEF(1)	Module Definition 1. Clock line for Serial ID.	3
6	MOD_DEF(0)	Module Definition 0. Grounded within the module.	3
7	Rate Select	No connection required
8	LOS	Loss of Signal indication. Logic 0 indicates normal operation.	4
9	VEER	Receiver Ground (Common with Transmitter Ground)	1
10	VEER	Receiver Ground (Common with Transmitter Ground)	1
11	VEER	Receiver Ground (Common with Transmitter Ground)	1
12	RD-	Receiver Inverted DATA out. AC Coupled
13	RD+	Receiver Non-inverted DATA out. AC Coupled
14	VEER	Receiver Ground (Common with Transmitter Ground)	1
15	VCCR	Receiver Power Supply
16	VCCT	Transmitter Power Supply
17	VEET	Transmitter Ground (Common with Receiver Ground)	1
18	TD+	Transmitter Non-Inverted DATA in. AC Coupled.
19	TD-	Transmitter Inverted DATA in. AC Coupled.
20	VEET	Transmitter Ground (Common with Receiver Ground)	1

Notes:

1. Circuit ground is connected to chassis ground

2. PHY disabled on TDIS > 2.0V or open, enabled on TDIS < 0.8V

3. Should be pulled up with 4.7k – 10k Ohms on host board to a voltage between 2.0 V and 3.6 V. MOD_DEF(0) pulls line low to indicate module is plugged in.

4. LVTTL compatible with a maximum voltage of 2.5V.

Not supported on 10/100/1000BASE-T.

Diagram of host board connector block pin numbers and names

+3.3V Volt Electrical Power Interface

The SFP-1000BASE-T/SFP-1000BASE-T-SGMII has an input voltage range of 3.3 V +/- 5%. The 4V maximum voltage is not allowed for continuous operation.

+3.3 Volt Electrical Power Interface
Parameter	Symbol	Min	Typ	Max	unit	Notes/Conditions
Supply Current	Is		320	375	mA	1.2W max power overfull range of voltageand temperature.See caution note below
Input Voltage	Vcc	3.13	3.3	3.47	V	Referenced to GND
Maximum Voltage	Vmax			4	V
Surge Current	Isurge			30	mA	Hot plug above steady statecurrent. See caution note below

Caution: Power consumption and surge current are higher than the specified values in the SFP MSA.

Low-Speed Signals

MOD_DEF(1) (SCL) and MOD_DEF(2) (SDA), are open drain CMOS signals (see section VII,

“Serial Communication Protocol”). Both MOD_DEF(1) and MOD_DEF(2) must be pulled up to host_Vcc.

Low-Speed Signals, Electronic Characteristics
Parameter	Symbol	Min	Max	unit	Notes/Conditions
SFP Output LOW	VOL	0	0.5	V	4.7k to 10k pull-up to host_Vcc,measured at host side of connector
SFP Output HIGH	VOH	host_Vcc -0.5	host_Vcc + 0.3	V	4.7k to 10k pull-up to host_Vcc,measured at host side of connector
SFP Input LOW	VIL	0	0.8	V	4.7k to 10k pull-up to Vcc,measured at SFP side of connector
SFP Input HIGH	VIH	2	Vcc + 0.3	V	4.7k to 10k pull-up to Vcc,measured at SFP side of connector

High-Speed Electrical Interface

All high-speed signals are AC-coupled internally

High-Speed Electrical Interface, Transmission Line-SFP
Parameter	Symbol	Min	Typ	Max	unit	Notes/Conditions
Line Frequency	fL		125		MHz	5-level encoding, perIEEE 802.3
Tx Output Impedance	Zout,TX		100		Ohm	Differential, for allfrequencies between1MHz and 125MHz
Rx Input Impedance	Zin,RX		100		Ohm	Differential, for allfrequencies between1MHz and 125MHz

High-Speed Electrical Interface, Host-SFP
Parameter	Symbol	Min	Typ	Max	unit	Notes/Conditions
Single ended data inputswing	Vinsing	250		1200	mV	Single ended
Single ended data outputswing	Voutsing	350		800	mV	Single ended
Rise/Fall Time	Tr,Tf		175		psec	20%-80%
Tx Input Impedance	Zin		50		Ohm	Single ended
Rx Output Impedance	Zout		50		Ohm	Single ended

General Specifications

General
Parameter	Symbol	Min	Typ	Max	unit	Notes/Conditions
Data Rate	BR	10		1000	Mb/sec	IEEE 802.3 compatible.See Notes 2 through 4 below
Cable Length	L			100	m	Category 5 UTP. BER

Notes:
1. Clock tolerance is +/- 50 ppm
2. By default, the SFP-1000BASE-T/SFP-1000BASE-T-SGMII is a full duplex device in preferred master mode.
3. Automatic crossover detection is enabled. External crossover cable is not required.

Environmental Specifications

Environmental Specifications
Parameter	Symbol	Min	Typ	Max	unit	Notes/Conditions
Operating Temperature	Top	-40		70	°C	Case temperature
Storage Temperature	Tsto	-40		85	°C	Ambient temperature

Serial Communication Protocol

All SFPs support the 2-wire serial communication protocol outlined in the

SFP MSA. These SFPs use an MCU, can be accessed with address of A0h.

The 1000BASE-T physical layer IC can also be accessed via the 2-wire serial bus

at address ACh. For details interfacing with the PHY IC, see Marvell data sheet

titled “Alaska Ultra 88E1111 Integrated Gigabit Ethernet Transceiver”

(Marvell document number MV-S100649-00).

Serial Bus Timing, Requirements
Parameter	Symbol	Min	Typ	Max	unit	Notes/Conditions
I2C Clock Rate		0		200,000	Hz

Mechanical Specifications (Unit:mm)

Brand

Cudy

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