MAX1487E 查看數據表（PDF） - Maxim Integrated

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MAX1487E

±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers

Maxim Integrated 

±15kV ESD-Protected, Slew-Rate-Limited,

Low-Power, RS-485/RS-422 Transceivers

______________________________________________________________Pin Description

PIN

MAX481E/MAX483E

MAX485E/MAX487E

MAX1487E

MAX488E

MAX490E

MAX489E

MAX491E

NAME

FUNCTION

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

–R—E–

Receiver Output Enable. RO is enabled when –R—E– is

low; RO is high impedance when R–—E– is high.

Driver Output Enable. The driver outputs, Y and Z, are

enabled by bringing DE high. They are high imped-

3

—

4

DE

ance when DE is low. If the driver outputs are enabled,

the parts function as line drivers.

impedance, they function as line

rWecheileivethresyifa–R—reE–hisiglhow.

Driver Input. A low on DI forces output Y low and out-

4

3

5

DI

put 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

14

VCC

Positive Supply: 4.75V ≤ VCC ≤ 5.25V

—

—

1, 8, 13

N.C.

No Connect—not internally connected

_______________________________________________________________________________________ 7

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