MAX4890 datasheet(3/17 Pages) MAXIM

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10/100/1000 Base-T Ethernet LAN Switch

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ELECTRICAL CHARACTERISTICS (continued)

(V+ = +3V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+ = 3.3V, TA = +25°C.) (Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

VCT1

1MHz < f < 30MHz

-45

VCT2

30MHz < f < 60MHz

-40

Crosstalk

VCT3

Any switch to any

switch RL = 100

Ω,

Figure 3

60MHz < f < 100MHz

-35

VDCT1

1MHz < f < 30MHz

-60

VDCT2

30MHz < f < 60MHz

-55

Differential Crosstalk

VDCT3

RL = 100

Ω,

Figure 4

60MHz < f < 100MHz

-50

SWITCH DYNAMICS

On-Channel -3dB Bandwidth

RL = 100

Ω, Differential pair

1000

MHz

Off-Capacitance

COFF

f = 1MHz, _B_ inputs

3.5

On-Capacitance

CON

f = 1MHz, _B_ inputs

6.5

Off-Capacitance, LED Switches

COFFLED

f = 1MHz, _LED inputs

On-Capacitance, LED Switches

CONLED

f = 1MHz, _LED inputs

Turn-On Time

tON

VA_ = 1V, Figure 5

Turn-Off Time

tOFF

VA_ = 1V, Figure 5

Propagation Delay

tPLH, tPHL

CL = 10pF, Figure 6

0.15

Output Skew Between Ports

tSK(o)

Skew between A4 and A5 and any other

port, Figure 7

0.01

Output Skew Same Port

tSK(p)

Skew between opposite transitions in same

port

0.07

SWITCH LOGIC

Input-Voltage Low

VIL

0.8

Input-Voltage High

VIH

2.0

Input-Logic Hysteresis

VHYST

100

Input Leakage Current

ISEL

V+ = 3.6V, VSEL = 0 or V+

-5

Operating Supply-Voltage Range

V+

3.6

Quiescent Supply Current

I+

V+ = 3.6V, VSEL = 0 or V+

280

450

µA

Note 2: Specifications at -40°C are guaranteed by design.

Note 3: Guaranteed by design.

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