SP486 Datasheet, PDF (4/7 Pages) Sipex Corporation – Quad RS-485/RS-422 Line Drivers

PINOUT — SP487
DI₁ 1
1
DO₁A 2
DO₁B 3
EN₁/EN₂ 4
DO₂B 5
DO₂A 6
2
DI₂ 7
GND 8
SP487 ^{16 V}CC
15 DI₄
4
14 DO₄A
13 DO₄B
12 EN₃/EN₄
11 DO₃B
10 DO₃A
3
9 DI₃
Pin 16 — Supply Voltage V_CC — 4.75V ≤ V_CC ≤
5.25V.
SP487 PINOUT
Pin 1 — DI — Driver 1 Input — If Driver 1 output is
1
enabled, logic 0 on DI₁ forces driver output DO₁A low
and DO₁B high. A logic 1 on DI₁ with Driver 1 output
enabled forces driver DO₁A high and DO₁B low.
Pin 2 — DO₁A — Driver 1 output A.
Pin 3 — DO₁B — Driver 1 output B.
Pin 4 — EN₁/EN₂ — Driver 1 and 2 Output Enable.
Please refer to SP487 Truth Table (2).
Pin 5 — DO₂B — Driver 2 output B.
Pin 6 — DO A — Driver 2 output A.
2
Pin 7 — DI₂ — Driver 2 Input — If Driver 2 output is
enabled, logic 0 on DI₂ forces driver output DO₂A low
and DO₂B high. A logic 1 on DI₂ with Driver 2 output
enabled forces driver DO₂A high and DO₂B low.
Pin 8 — GND — Digital Ground.
Pin 9 — DI₃ — Driver 3 Input — If Driver 3 output is
enabled, logic 0 on DI₃ forces driver output DO₃A low
andDO Bhigh.Alogic1onDI withDriver3output
3
3
enabled forces driver DO₃A high and DO₃B low.
Pin 10 — DO A — Driver 3 output A.
3
INPUT
DI
H
L
H
L
X
ENABLES
EN
EN
H
X
H
X
X
L
X
L
L
H
Table 1. SP486 Truth Table
OUTPUTS
OUTA OUTB
H
L
L
H
H
L
L
H
Hi–Z
Hi–Z
Pin 11 — DO₃B — Driver 3 output B.
Pin 12 — EN₃/EN₄ — Driver 3 and 4 Output Enable.
Please refer to SP487 Truth Table (2).
Pin 13 — DO₄B — Driver 4 output B.
Pin 14 — DO₄A — Driver 4 output A.
Pin 15 — DI — Driver 4 Input — If Driver 4 output
4
is enabled, logic 0 on DI₄ forces driver output DO₄A
low and DO₄B high. A logic 1 on DI₄ with Driver 3
output enabled forces driver DO A high and DO B
4
4
low.
Pin 16 — Supply Voltage V_CC — 4.75V ≤ V_CC ≤
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.
INPUT
ENABLES
OUTPUTS
DI EN1/EN2 or EN3/EN4 OUTA OUTB
H
H
H
L
L
H
L
H
X
L
Hi–Z Hi–Z
Table 2. SP487 Truth Table
SP486/487
Quad RS-485/RS-422 Line Drivers
4
© Copyright 2000 Sipex Corporation