SP486CT datasheet(4/7 Pages) SIPEX

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SP486/487

Quad RS-485/RS-422 Line Drivers

PINOUT — SP487

SP487

DI1

DO1A

DO1B

EN1/EN2

DO2B

DO2A

DI2

GND

VCC

DI4

DO4A

DO4B

EN3/EN4

DO3B

DO3A

DI3

Pin 16 — Supply Voltage V

CC — 4.75V ≤ VCC ≤

5.25V.

SP487 PINOUT

Pin 1 — DI

1 — Driver 1 Input — If Driver 1 output is

enabled,logic0onDI

1 forces driver output DO1A low

and DO

1B high. A logic 1 on DI1 with Driver 1 output

enabled forces driver DO

1A high and DO1B low.

Pin 2 — DO

1A — Driver 1 output A.

Pin 3 — DO

1B — Driver 1 output B.

Pin 4 — EN

1/EN2 — Driver 1 and 2 Output Enable.

Please refer to SP487 Truth Table (2).

Pin 5 — DO

2B — Driver 2 output B.

Pin 6 — DO

2A — Driver 2 output A.

Pin 7 — DI

2 — Driver 2 Input — If Driver 2 output is

enabled,logic0onDI

2 forces driver output DO2A low

and DO

2B high. A logic 1 on DI2 with Driver 2 output

enabled forces driver DO

2A high and DO2B low.

Pin 8 — GND — Digital Ground.

Pin 9 — DI

3 — Driver 3 Input — If Driver 3 output is

enabled,logic0onDI

3 forces driver output DO3A low

and DO

3B high. A logic 1 on DI3 with Driver 3 output

enabled forces driver DO

3A high and DO3B low.

Pin 10 — DO

3A — Driver 3 output A.

INPUT

ENABLES

OUTPUTS

OUTA

OUTB

Hi–Z

Table 1. SP486 Truth Table

INPUT

ENABLES

OUTPUTS

EN1/EN2 or EN3/EN4

OUTA

OUTB

HHH

Hi–Z

Table 2. SP487 Truth Table

Pin 11 — DO

3B — Driver 3 output B.

Pin 12 — EN

3/EN4 — Driver 3 and 4 Output Enable.

Please refer to SP487 Truth Table (2).

Pin 13 — DO

4B — Driver 4 output B.

Pin 14 — DO

4A — Driver 4 output A.

Pin 15 — DI

4 — Driver 4 Input — If Driver 4 output

is enabled, logic 0 on DI

4 forces driver output DO4A

low and DO

4B high. A logic 1 on DI4 with Driver 3

output enabled forces driver DO

4A high and DO4B

low.

Pin 16 — Supply Voltage V

CC — 4.75V ≤ VCC ≤

5.25V.

FEATURES…

The SP486 and SP487 are low–power quad differ-

ential line drivers meeting RS-485 and RS-422

standards. The SP486 features active high and

active low common driver enable controls; the

SP487 provides independent, active high driver

enable controls for each pair of drivers. The driver

outputs are short–circuit limited to 200mA. Data

rates up to 10Mbps are supported. Both are avail-

able in 16–pin plastic DIP and SOIC packages.

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