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Ref: ATGBICS_U1GC-C_V1

Page 4 of 7

Product Datasheet

+3.3V Volt Electrical Power Interface

The U1GC-C has an input voltage range of 3.3 V +/- 5%. The 4 V maximum voltage is not allowed for

continuous operation.

Parameter

Symbol

Min.

Typical

Max.

Units

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

Surge

Current

Isurge

30

mA

Hot plug above steady state

current. See caution note

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

Table 2. +3.3 Volt electrical power interface

Low-Speed Signals

MOD_DEF(1) (SCL) and MOD_DEF(2) (SDA), are open drain CMOS signals. Both MOD_ DEF(1) and

MOD_DEF(2) must be pulled up to host_Vcc.

Parameter

Symbol

Min.

Max.

Units

Notes/Conditions

SFP Output

LOW

VOL

0

0.5

V

4.7k to 10k pull-up to

host_Vcc.

SFP Output

HIGH

VOH

host_Vcc -

0.5

host_Vcc +

0.3

V

4.7k to 10k pull-up to

host_Vcc.

SFP Input LOW

VIL

0

0.8

V

4.7k to 10k pull-up to Vcc.

SFP Input

HIGH

2

Vcc + 0.3 V

V

4.7k to 10k pull-up to Vcc.

High-Speed Electrical Interface

Transmission Line-SFP

Parameter

Symbol

Min.

Typical

Max.

Units

Notes/Conditions

Line Frequency

fL

125

MHz

5-level encoding, per IEEE

802.3

Tx Output

Impedance

Zout,TX

100

Ohm

Differential

Rx Input

Impedance

Zin,RX

100

Ohm

Differential

Table 4. High-speed electrical interface, transmission line-SFP