5

ML4662

AC ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

MIN

TYP

MAX

UNITS

TRANSMIT

Transmit Idle Frequency

0.85

1.25

MHz

Transmit Idle Duty Cycle

45

55

%

Transmit Turn-On Pulse Width

20

ns

Transmit Turn-On Delay

200

ns

Transmit loopback Start up Delay

500

ns

Transmit Start of Idle

400

2100

ns

Transmit Steady State Propagation Delay

15

50

ns

Transmit Jitter into 31

Ω Load

±1.5

ns

Transmit Turn-off Pulse Width

180

ns

RECEIVE

Receive Squelch Frequency Threshold

2.51

4.5

MHz

Receive Turn-On Delay

270

ns

Last Bit Received to Slow Decay Output

230

300

ns

Receive Steady State Propagation Delay

15

50

ns

Receive Jitter

±1.5

ns

Differential Output Rise Time 20% to 80% (Rx

±, COL±)4

ns

Differential Output Fall Time 20% to 80% (Rx

±, COL±)4

ns

COLLISION

Collision Present to SQE Assert

0

350

ns

Time for SQE to Deactivate After Collision

0

700

ns

Collision Frequency

8.5

11.5

MHz

Collision Pulse Duty Cycle

40

50

60

%

SQE Test Delay (Tx Inactive to SQE)

0.6

1.6

µs

SQE Test Duration

0.5

1.0

1.5

µs

JABBER AND LED TIMING

Jabber Activation Delay

20

70

150

ms

Jabber Reset Unjab Time

250

450

750

ms

Delay from Outputs Disabled to Collision Oscillator On

100

ns

RCV, CLSN, XMT On Time

8

16

32

ms

Low Light Present to LMON High

3

5

10

µs

Low Light Present to LMON Low

250

750

ms

Note 1: Limits are guaranteed by 100% testing, sampling, or correlation with worst-case test conditions.

Note 2: This does not include the current from the AUI pull-down resistors, or LED status outputs.

Note 4: Does not include prebias current for fiber optic LED which would typically be 3mA.