±15kV ESD-Protected, 10Mbps, 3V/5V,

Low-Power Quad RS-422/RS-485 Receivers

6

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Pin Description

NAME

FUNCTION

1

A-

Inverting Receiver A Input

2

A+

Noninverting Receiver A Input

PIN

3

YA

Receiver A Output. Enabled when ENAC = high. YA will be logic high if A+ > A- by 200mV, and low if

A+ < A- by 200mV. It will be logic high if A+ and A- remain floating. Otherwise, the state is undetermined.

YA goes high impedance when ENAC = low.

4

ENAC

Receiver Output A and C Enable High. A logic high on this input enables receivers A and C.

8

GND

Ground

7

C-

Inverting Receiver C Input

6

C+

Noninverting Receiver C Input

5

YC

Receiver C Output. Same functionality as YA.

13

YB

Receiver B Output. Same functionality as YD.

12

ENBD

Receiver Output B and D Enable High. A logic high on this input enables receivers B and D.

11

YD

Receiver D Output. Enabled when ENBD = high. YD will be logic high if D+ > D- by 200mV, and low if

D+ < D- by 200mV. It will be a logic high if D+ and D- remain floating. Otherwise, the state is undetermined.

YD goes high impedance when ENBD = low.

10

D+

Noninverting Receiver D Input

9

D-

Inverting Receiver D Input

TIME (200ns/div)

SHUTDOWN TIMING

MAX3093/94E TOC09

MAX3093E

Y VOLTAGE

5V/div

2V/div

2V/div

MAX3094E

Y VOLTAGE

G VOLTAGE

CIRCUIT OF FIGURE 3,

S1 OPEN, S2 CLOSED, S3 = 1V

Typical Operating Characteristics (continued)

14

B+

Noninverting Receiver B Input

15

B-

Inverting Receiver B Input

16

Positive Supply