3

Rev N 9/15/2006

SP3080E Advanced RS485 Transceiver

© Copyright 2006 Sipex Corporation

PIN ASSIGNMENTS

Pin Number

Pin Name

Pin Function

2

RO

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

200mV, RO is low.

3

RE

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

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

input.

4

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.

5

DI

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

inverting output high. A high level on DI forces non-inverting output high and inverting

output low.

6, 7

GND

Ground

9

Y

Non-inverting Driver Output

10

Z

Inverting Driver Output

11

B

Inverting Receiver Input

12

A

Non-inverting Receiver Input

14

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

1, 8, 13

NC

No Connect, not internally connected

Note: On the 14-pin package connect both pins 6 and 7 to Ground.