PIN

NAME

FUNCTION

MAX3483/

MAX3485/

MAX3486

MAX3488/

MAX3490

MAX3491

1

2

2

RO

Receiver Output. If A > B by 200mV, RO will be high; if A < B by

200mV, RO will be low.

2

—

3

RE

Receiver Output Enable. RO is enabled when RE is low; RO is high

impedance when RE is high. If RE is high and DE is low, the device

will enter a low-power shutdown mode.

3

—

4

DE

Driver Output Enable. The driver outputs are enabled by bringing DE

high. They are high impedance when DE is low. If RE is high and DE

is low, the device will enter a low-power shutdown mode. If the driver

outputs are enabled, the parts function as line drivers. While they are

high impedance, they function as line receivers if RE is low.

4

3

5

DI

Driver Input. A low on DI forces output Y low and output Z high.

Similarly, a high on DI forces output Y high and output Z low.

5

4

6, 7

GND

Ground

—

5

9

Y

Noninverting Driver Output

—

6

10

Z

Inverting Driver Output

6

—

—

A

Noninverting Receiver Input and Noninverting Driver Output

—

8

12

A

Noninverting Receiver Input

7

—

—

B

Inverting Receiver Input and Inverting Driver Output

—

7

11

B

Inverting Receiver Input

8

1

13, 14

—

—

1, 8

N.C.

No Connect—not internally connected

0.8

0.7

0.9

1.0

1.1

1.2

-40 -20

0

20

40

60

100

80

SUPPLY CURRENT

vs. TEMPERATURE

TEMPERATURE (°C)

X = DON’T CARE

DE = 0, RE = 0

0

10

20

30

40

50

60

70

80

100

90

-40 -20

0

20

40

60

100

80

SHUTDOWN CURRENT

vs. TEMPERATURE

TEMPERATURE (°C)

MAX3483/MAX3485/

MAX3486/MAX3488/

MAX3490/MAX3491

3.3V-Powered, 10Mbps and Slew-Rate-Limited

True RS-485/RS-422 Transceivers

Maxim Integrated │ 7

www.maximintegrated.com

Typical Operating Characteristics (continued)

Pin Description