ASFP-1G-T-I -

Alpha Bridge ASFP-1G-T-I

Features

• Up to 1.25Gb/s bi-directional data links
• Hot-pluggable SFP footprint
• Extended case temperature range commercial (0°C to +70°C ), industrial (-40°C to +85°C )
• Fully metallic enclosure for low EMI
• Low power dissipation (1.05 W typical)
• Compact RJ-45 connector assembly
• Access to physical layer IC via 2-wire serial bus
• 1000BASE-T operation in host systems with SERDES interface
• 10/100/1000Mbps compliant in host systems with SGMII interface

Applications

• 1.25 Gigabit Ethernet over Cat cable

Description

The Copper Small Form Pluggable (SFP)transceivers is high performance, cost-effective module compliant with the Gigabit Ethernet and 1000BASE-T standards as specified in IEEE 802. 3-2002 and IEEE 802.3ab, which supporting 1000Mbps data- rate up to 100 meters reach over unshielded twisted-pair category cable. The module supports 1000Mbps full duplex data-links with 5-level Pulse Amplitude Modulation (PAM) signals. All four pairs in the cable are used with symbol rate at 250Mbps on each pair. The module provides standard serial ID information compliant with SFP MSA, which can be accessed with address of A0h via the 2wire serial CMOS EEPROM protocol. The physical IC can also be accessed via 2wire serial bus at address A0h.

Pin Descriptions

Pin	Signal Name	Description	Plug Seq.	Notes
1	VEET	Transmitter Ground	1
2	TX FAULT	Transmitter Fault Indication	3	Note1
3	TX DISABLE	Transmitter Disable	3	Note2
4	MOD_DEF(2)	SDA Serial Data Signal	3	Note3
5	MOD_DEF(1)	SCL Serial Clock Signal	3	Note3
6	MOD_DEF(0)	TTL Low	3	Note3
7	Rate Select	Not Connected	3
8	LOS	Loss of Signal	3	Note 4
9	VEER	Receiver ground	1
10	VEER	Receiver ground	1
11	VEER	Receiver ground	1
12	RX-	Inv. Received Data Out	3	Note 5
13	RX+	Received Data Out	3	Note 5
14	VEER	Receiver ground	1
15	VCCR	Receiver Power Supply	2
16	VCCT	Transmitter Power Supply	2
17	VEET	Transmitter Ground	1
18	TX+	Transmit Data In	3	Note 6
19	TX-	Inv. Transmit Data In	3	Note 6
20	VEET	Transmitter Ground	1

+3.3 Volt Electrical Power Interface

Parameter	Symbol	Min	Type	Max	Units	Notes/Conditions
Supply Current		Is	320	375	mA	1.2W max power over full range of voltage and temperature. See the 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 the caution note below

low-Speed signals

Parameter	Symbol	Min	Max	Units	Notes/Conditions
SFP Output LOW	VOL	0	0.5	V	4.7k to 10k pull-up to host_Vcc, measured at host side of the 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

Parameter	Symbol	Min	Typ.	Max	Units	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 electriacl interface, host sfp

Parameter	Symbol	Min	Typ.	Max	Units	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

Genral Specifictaion

Parameter	Symbol	Min	Typ.	Max	Units	Notes/Conditions
Data Rate	BR	10		1,000	Mb/sec	IEEE 802.3 compatible.See Notes 2 through 4 below
Cable Length	L			100	m	Category 5 UTP. BER <10-12

Ordering Information

Part Number	Description
ASFP-1G-T-I	10/100/1000Mbps, Copper SFP, RJ45, 100 Meter