AM79C981 datasheet(26/40 Pages) AMD

26 / 40 page

AMD

PRELIMINARY

1–96

Am79C981

DC CHARACTERISTICS (continued)

Parameter

Symbol

Parameter Description

Test Conditions

Min

Max

Unit

Twisted Pair Ports

IIRXD

Input current at RXD+/-

AVSS<VIN<AVDD

–500

+500

µA

RRXD

RXD differential input resistance

(Note 1)

–

Ω

VTIVB

RXD+,RXD- open circuit input

IIN = 0 mA

AVDD–3.0

AVDD–1.5

voltage (bias)

VTID

Differential Mode input voltage

AVDD = 5.0 V

–3.1

+3.1

range (RXD)

VTSQ+

RXD positive squelch threshold

Sinusoid 5 MHz <f< 10 MHz

300

520

(peak)

VTSQ-

RXD negative squelch threshold

Sinusoid 5 MHz <f< 10 MHz

–520

–300

(peak)

VTHS+

RXD post-squelch positive threshold

Sinusoid 5 MHz <f< 10 MHz

150

293

(peak)

VTHS-

RXD post-squelch negative threshold

Sinusoid 5 MHz <f< 10 MHz

–293

–150

(peak)

VRXDTH

RXD switching threshold

(Note 1)

–60

+60

VTXH

TXD+/- and TXP+/- output

DVSS = 0 V

DVDD–0.6

DVDD

HIGH voltage

(Note 2)

VTXL

TXD+/- and TXP+/- output

DVDD = 5 V

DVSS

DVSS+0.6

LOW voltage

(Note 2)

VTXI

TXD+/- and TXP+/- differential

–40

+40

output voltage imbalance

VTXOFF

TXD+/- and TXP+/- differential

DVDD = 5 V

–

idle output voltage

RTXD

TXD+/- differential driver

(Note 1)

–

Ω

output impedance

RTXP

TXP+/- differential driver

(Note 1)

–

Ω

output impedance

Power Supply Current

IDD

Power supply current (idle)

fX1 = 20 MHz

–

180

Power supply current (transmitting

fX1 = 20 MHz

–

300

– no TP load)

Power supply current (transmitting

fX1 = 20 MHz

–

(Note 8)

– with TP load)

AM79C981 데이터시트(PDF) 26 Page - Advanced Micro Devices

AM79C981 데이터시트(HTML) 26 Page - Advanced Micro Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

데이터시트 다운로드

링크 URL