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AM79C100

Twisted-Pair Ethernet Transceiver (TPEX)

Advanced Micro Devices 

DC CHARACTERISTICS (continued)

Parameter

Symbol

Parameter Description

Twisted Pair Interface

IIRXD

Input Current at RXD±

RRXD

RXD± Differential Input

Resistance

VTIVB

RXD+, RXD– Open Circuit

Input Voltage (Bias)

VTIDV

Differential Mode Input

Voltage Range (RXD±)

VTSQ+

RXD Positive

Squelch Threshold (Peak)

VTSQ–

RXD Negative

Squelch Threshold (Peak)

VTHS+

RXD Post-Squelch Positive

Threshold (Peak)

VTHS–

RXD Post-Squelch Negative

Threshold (Peak)

VLTSQ+

RXD Positive

Squelch Threshold (Peak)

VLTSQ–

RXD Negative

Squelch Threshold (Peak)

VLTHS+

RXD Post-Squelch Positive

Threshold (Peak)

VLTHS–

RXD Post-Squelch Negative

Threshold (Peak)

VRXDTH

RXD Switching Threshold

VTXH

TXD± and TXP±

Output HIGH Voltage

VTXL

TXD± and TXP±

Output LOW Voltage

VTXI

TXD± and TXP± Differential

Output Voltage Imbalance

VTXOFF

TXD± and TXP±

Idle Output Voltage

RTX

TXD± and TXP± Differential

Driver Output Impedance

IIREXT

Input Current at REXT Pin

Power Supply Current

IDD

Power Supply Current

(Idle)

Power Supply Current

(Transmitting—No TP load)

Power Supply Current

(Transmitting—with TP load)

IDDPRDN

Power Supply Current

in Power Down Mode

Notes:

1. Parameter not tested.

2. Uses switching test load.

Test Conditions

AVSS < VIN < AVDD

(Note 1)

IIN = 0 mA

AVDD = +5 V

Sinusoid

5 MHz < f < 10 MHz

Sinusoid

5 MHz < f < 10 MHz

Sinusoid

5 MHz < f < 10 MHz

Sinusoid

5 MHz < f < 10 MHz

LRT = LOW

LRT = LOW

LRT = LOW

LRT = LOW

(Note 1)

DVSS = 0 V

(Note 2)

DVSS = +5 V

(Note 2)

DVDD = +5 V

(Note 1)

REXT = 24.3 kΩ ±1%

AVDD = +5 V

PRDN/RST = HIGH

DVDD = AVDD = +5 V

PRDN/RST = LOW

PRDN/RST = HIGH

DVDD = AVDD = +5 V

PRDN/RST = LOW

16

Am79C100

AMD

Min

Max

Unit

–500

10

500

uA

KΩ

AvDD –3.0 AvDD –1.5

V

–3.1

3.1

V

300

520

mV

–520

–300

mV

150

293

mV

–293

–150

mV

180

312

mV

–312

–180

mV

90

175

mV

–175

–90

mV

–60

60

mV

DVDD –0.6

DVDD

V

DVSS

DVSS + 0.6 V

–40

40

mV

–40

40

mV

40

Ω

120

µA

40

mA

95

mA

150

mA

4

mA

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