Rev J 3/8/2007

SP1486E PROFIBUS/RS485 Transceivers

© Copyright 2007 Sipex Corporation

2

PIN ASSIGNMENTS

Pin Name

Pin Function

Pin Function

1

RO

Receiver Output. When RE is low and if (A – B) ≥ -40mV, RO is High. If (A – B) ≤ - 200mV, RO

is low.

2

RE

Receiver Output Enable. RO is enabled when RE is low. When RE is high, RO is high imped-

ance. Drive RE high and DE low to enter shutdown mode. RE is a hot-swap input.

3

DE

Driver Output Enable. When DE is high, outputs are enabled. When DE is low, outputs are

high impedance. Drive DE low and RE high to enter shutdown mode. DE is a hot-swap input.

4

DI

Driver Input. With DE high, a low level on DI forces non-inverting output low and inverting out-

put high. Similarly, a high level on DI forces non-inverting output high and inverting output low.

5

GND

Ground

6

A

Non-inverting Receiver Input and Non-inverting Driver Output

7

B

Inverting Receiver Input and Inverting Driver Output

8

Vcc

Positive Supply Vcc. Bypass Vcc to GND with a 0.1uF capacitor.