3.3V, High-Speed, RS-485/RS-422 Transceiver in

SOT Package

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9

Detailed Description

The MAX3362 low-power, high-speed transceiver for

RS-485/RS-422 communication operates from a single

+3.3V power supply. The device contains one differen-

tial line driver and one differential line receiver. The dri-

ver and receiver may be independently enabled. When

disabled, outputs enter a high-impedance state.

The transceiver guarantees data rates up to 20Mbps,

with an output skew of less than 6ns. This low skew

time makes the MAX3362 ideal for multidrop clock/data

distribution applications, such as cellular base stations.

Driver and receiver propagation delays are below 50ns.

The output level is guaranteed at 1.5V on a standard

54

Ω load.

The device has a hot-swap feature that eliminates false

transitions on the data cable during circuit initialization.

Also, drivers are short-circuit current limited and are

protected against excessive power dissipation by ther-

mal shutdown circuitry.

1.5V

-1.5V

GENERATOR

50

Ω

Ω

R

S3

S1

S2

IN

OUT

3V

0

0

1.5V

IN

OUT

3V

0

0

1.5V

0.25V

IN

OUT

3V

0

1.5V

IN

OUT

3V

0

0

1.5V

0.25V

1.5V

S1 OPEN

S2 CLOSED

S3 = 1.5V

S1 OPEN

S2 CLOSED

S3 = 1.5V

S1 CLOSED

S2 OPEN

S3 = -1.5V

S1 CLOSED

S2 OPEN

S3 = -1.5V

Figure 7. Receiver Enable and Disable Times