8

Transmitter and Receiver Electrical Characteristics

Parameter

Symbol

Minimum

Typical

Maximum

Unit

Notes

Data Input:

Transmitter Differential

Input Voltage (TD +/-)

500

2400

mV

Note 1

Data Output:

Receiver Differential

Output Voltage (RD +/-)

370

735

2000

mV

Note 2

Receive Data Rise & Fall Times

(Receiver)

Trf

100

250

ps

Note 3

Transceiver Timing Characteristics

Parameter

Symbol

Minimum

Typical

Maximum

Unit

Notes

Tx Disable Assert Time

t_off

NA

Note 4

Tx Disable Negate Time

t_on

NA

Note 4

Module Reset Assert Time

t_off_rst

10

ms

Note 5

Module Reset Negate Time

t_on_rst

300

ms

Note 6

Time to initialize

t_init

300

ms

Tx Fault Assert Time

t_fault

NA

Note 7

Tx Disable to Reset

t_reset

NA

Note 7

LOS Assert Time

t_loss_on

NA

Note 7

LOS De-assert Time

t_loss_off

NA

Note 7

Rate Select Change Time

t_ratesel

NA

Note 7

Serial ID Clock Rate

F_serial_clock

100

kHz

Notes:

1. Internally ac coupled and terminated (100 Ohm differential). These levels are compatible with CML and LVPECL voltage swings.

2. Internally ac coupled with an external 100 ohm differential load termination.

3. 20%-80% rise and fall times measured with a 500 MHz signal utilizing a 1010 pattern.

4. Tx Disable function as described in the SFP MSA is not used in the 1000BASE-T module.

5. Time from rising edge of Tx Disable until link comes down.

6. Time from falling edge of Tx Disable until auto-negotiation starts.

7. Not used in the 1000BASE-T module