Over recommended operating supply and temperature ranges unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

(Note 2)

Max

Units

DRIVER SPECIFICATIONS

V

PE

Output Pre-Emphasis

Voltage Ratio

20*log(VODPE/VODB)

R

Running K28.7 pattern at 4.25 Gbps

PREx_[1:0]=00

PREx_[1:0]=01

PREx_[1:0]=10

PREx_[1:0]=11

x=S for switch side pre-emphasis control

x=L for line side pre-emphasis control

See Figure 1 on waveform.

See Figure 5 for test circuit.

0

−3

−6

−9

dB

dB

dB

dB

t

PE

Pre-Emphasis Width

(Note 8)

Tested at −9 dB pre-emphasis level,

PREx[1:0]=11

x=S for switch side pre-emphasis control

x=L for line side pre-emphasis control

See Figure 4 on measurement condition.

125

200

250

ps

R

OTSE

Output Termination

On-chip termination from OUT+ or OUT− to

V

CC

42

50

58

Ω

R

OTD

Output Differential

Termination

On-chip differential termination between OUT+

and OUT−

100

Ω

∆R

OTSE

Mis-Match in Output

Termination

Resistors

Mis-match in output terminations at OUT+ and

OUT−

5

%

V

OCM

Output Common

Mode Voltage

2.4

2.9

V

POWER DISSIPATION

P

D

Power Dissipation

V

All outputs terminated by 100

PREL_[1:0]=0, PRES_[1:0]=0

Running PRBS 2

1W

AC CHARACTERISTICS

t

R

Differential Low to

High Transition Time

Measured with a clock-like pattern at

100 MHz, between 20% and 80% of the

differential output voltage. Pre-emphasis

disabled.

Transition time is measured with fixture as

shown in Figure 5, adjusted to reflect the

transition time at the output pins.

80

ps

t

F

Differential High to

Low Transition Time

80

ps

t

PLH

Differential Low to

High Propagation

Delay

Measured at 50% differential voltage from

input to output.

0.5

2

ns

t

PHL

Differential High to

Low Propagation

Delay

0.5

2

ns

t

SKP

Pulse Skew (Note 8)

|t

ps

t

SKO

Output Skew

(Notes 7, 8)

Difference in propagation delay among data

paths in the same device.

200

ps

t

SKPP

Part-to-Part Skew

(Note 8)

Difference in propagation delay between the

same output from devices operating under

identical condition.

500

ps

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