XR5487EID-F Просмотр технического описания (PDF) - Exar Corporation

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XR5487EID-F

ULTRA HIGH SPEED RS-485/RS-422 PROFIBUS TRANSCEIVERS WITH 1/8TH UNIT LOAD AND +/-15KV ESD-PROTECTION

Exar Corporation 

XR5486E-5488E

REV. 1.0.0

ULTRA HIGH SPEED RS-485/RS-422 PROFIBUS TRANSCEIVERS WITH 1/8TH UNIT LOAD AND +/-15KV ESD-PROTECTION

PIN DESCRIPTIONS

Pin Assignments

PIN NUMBER

HALF DUPLEX

FULL DUPLEX

PIN NAME

TYPE

DESCRIPTION

XR5488E

XR5487E

XR5486E

1

2

2

Receiver Output. When RE is low and if (A-

RO

O B) ≥ -50mV, RO is High. If (A-B) ≤ -200mV,

RO is Low.

2

-

3

Receiver Output Enable. When RE is Low,

RO is enabled. When RE is High, RO is

RE

I high impedance. RE should be High and DE

should be low to enter shutdown mode. RE

is a hot-swap input.

3

-

4

Driver Output Enable. When DE is High,

outputs are enabled. When DE is low, out-

DE

I puts are high impedance. DE should be low

and RE should be High to enter shutdown

mode. DE is a hot-swap input.

4

3

5

Driver Input. With DE high, a low level on DI

forces Non-Inverting output low and invert-

DI

I ing output high. Similarly, a high level on DI

forces Non-Inverting output High and Invert-

ing output Low.

5

4

6, 7

GND

Pwr Ground.

6

-

-

A

O

Non-Inverting Receiver Input and Non-

Inverting Driver Output.

7

-

-

B

O

Inverting Receiver Input and Inverting

Driver Output.

8

1

14

Vcc

Pwr

+5.0V power supply input. Bypass with

0.1uF capacitor.

-

8

12

A

I Non-Inverting Receiver Input.

-

7

11

B

I Inverting Receiver Input.

-

5

9

Y

O Non-Inverting Driver Output.

-

6

10

Z

O Inverting Driver Output.

-

-

1, 8, 13

NC

- No Connect, not internally connected.

Pin type: I=Input, O=Output.

3

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