Detailed Description

The LVDS interface standard is a signaling method

intended for point-to-point communication over a con-

trolled-impedance medium, as defined by the ANSI/

TIA/EIA-644 and IEEE 1596.3 standards. The LVDS

standard uses a lower voltage swing than other com-

mon communication standards, achieving higher data

rates with reduced power consumption while reducing

EMI emissions and system susceptibility to noise.

The MAX9155 is a 200Mbps LVDS repeater intended

for high-speed, point-to-point, low-power applications.

The MAX9155 accepts an LVDS input and reproduces

an LVDS signal at the output. This device is capable of

detecting differential signals as low as 50mV and as

high as 1.2V within a 0 to 2.4V input voltage range. The

LVDS standard specifies an input voltage range of 0 to

2.4V referenced to ground.

Fail-Safe

Fail-safe is a feature that puts the output in a known

logic state (differential high) under certain fault condi-

tions. The MAX9155 outputs are differential high when

the inputs are undriven and open, terminated, or shorted

(Table 1).

Low-Jitter, Low-Noise LVDS

Repeater in an SC70 Package

_______________________________________________________________________________________

5

400

450

500

550

600

650

700

750

800

-40

-15

10

35

60

85

TRANSITION TIME

VS.

TEMPERATURE

TEMPERATURE (

°C)

0

200

100

400

300

500

600

25

150

DIFFERENTIAL OUTPUT VOLTAGE

VS.

LOAD RESISTOR

LOAD RESISTOR (

Ω)

75

50

100

125

Typical Operating Characteristics (continued)

Pin Description

PIN

NAME

FUNCTION

1

OUT-

Inverting LVDS Output

2

GND

Ground

3

IN-

Inverting LVDS Input

4

IN+

Noninverting LVDS Input

with 0.01µF ceramic capacitor.

6

OUT+

Noninverting LVDS Output

> 50mV

High

< -50mV

Low

50mV

Indeterminate

Undriven open, short, or terminated

High

High = 450mV

Low = -250mV

Table 1. Function Table for LVDS Fail-Safe

Input (Figure 2)