10

Note 1:Guaranteed by characterization over process, temperature, and Vcc.

Note 2:It is recommended that the CDET control input be tied directly to Vcc or GND to ensure proper operation. If CDET is to be driven from a gate, it is

recommended that the gate be capable of true CMOS logic levels.

Note 3:The median voltage level for EQSEL is normally accomplished by floating that pin.

Note 4:ICC is a measure of total device current in normal MLT-3 mode with a 125Mb/s random data pattern applied to the PMRD+/- inputs to allow the

TXO+/- outputs to switch at a nominal 2V pk-pk differential amplitude into a standard 50

Ω differential load. ICC is minus the current through the PECL inputs.

Device configuration: LBEN=0, CDET=0, ENCSEL=0, EQSEL=float, PMRD+/-=125Mb/s data, RXI+/-=125Mb/s data.

Note 5:ICC does not include the current through the PECL outputs. Standard 50

Ω Thevenin equivalent PECL terminations (figure 10) require approximately

14 mA per pin, or a total of 56 mA. 100

Ω PECL terminations require approximately 7 mA per pin, or a total of 28 mA. These external PECL termination current

requirements should be considered when analyzing system power requirements.

Note 6:TXO output current is a measure of the total differential current present at the TXO+/- outputs into a standard 50

Ω differential load. Device configu-

Note 8:Signal Detect Assert Threshold is a measure of the pk-pk differential signal amplitude at the RXI+/- inputs of the RJ45 required to cause the Signal

Detect differential output to assert. Device configuration: LBEN=0, CDET=0, ENCSEL=0, EQSEL=float, PMRD+/-=static, RXI+/-=125Mb/s data with swept

amplitude.

Note 9:Signal Detect De-assert Threshold is a measure of the pk-pk differential signal amplitude at the RXI+/- inputs of the RJ45 required to cause the Signal

Detect differential output to de-assert. Device configuration: LBEN=0, CDET=0, ENCSEL=0, EQSEL=float, PMRD+/-=static, RXI+/-=125Mb/s data with

swept amplitude

Figure 4-1. ICC / Load Diagram

x 100

TXVCC

RXVCC

VCC

EXTVCC

SD+

SD-

PMID+

PMID-

TXO+ TXO-

TXGND RXGND GND

VCC

+

-

DP83223

25

Ω

25

Ω

VCC - 2V

+

-

50

Ω

TXREF

510

Ω

50

Ω 50Ω 50Ω

ICC