1.25G SFP Bi-di SM100GSB-20B
-
SM100GSB-20B 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 over
full range of voltage
and 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 state
current. 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, per
IEEE 802.3
Tx Output Impedance
Zout,TX
100
Ohm
Differential, for all
frequencies between
1MHz and 125MHz
Rx Input Impedance
Zin,RX
100
Ohm
Differential, for all
frequencies between
1MHz and 125MHz
High-Speed Electrical Interface, Host-SFP
Parameter
Symbol
Min
Typ
Max
unit
Notes/Conditions
Single ended data input
swing
Vinsing
250
1200
mV
Single ended
Single ended data output
swing
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)
-
-
● 1550Tx/1310Rx DFB 20km, 12.5dB
