SP483 AC SPECIFICATIONS
T
MIN
to T
MAX
and V
CC
= 5V
±
5% unless otherwise noted.
PARAMETERS
SP483 DRIVER
AC Characteristics
Maximum Data Rate
Driver Input to Output
Driver Skew
Driver Rise and Fall Time
MIN.
TYP.
MAX.
UNITS
CONDITIONS
250
250
250
800
800
100
2000
2000
800
2000
2000
2000
3000
3000
kbps
ns
ns
ns
ns
ns
ns
ns
ns
t
PLH
; R
DIFF
= 54Ω, C
L1
= C
L2 =
100pF;
see figures 3 & 6
t
PHL
; R
DIFF
= 54Ω, C
L1
= C
L2 =
100pF;
see figures 3 & 6
see figures 3 & 6,
t
SKEW
= |t
DPLH
- t
DPHL
|
250
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
SP483 RECEIVER
AC Characteristics
Maximum Data Rate
Receiver Input to Output
Diff. Receiver Skew It
PLH
-t
PHL
I
Receiver Enable to
Output Low
Receiver Enable to
Output High
Receiver Disable from Low
Receiver Disable from High
SP483
Shutdown Timing
Time to Shutdown
Driver Enable from Shutdown
to Output High
Driver Enable from Shutdown
to Output Low
Receiver Enable from
Shutdown to Output High
Receiver Enable from
Shutdown to Output Low
250
250
100
20
20
20
20
250
250
300
300
From 10% to 90%; R
DIFF
= 54Ω,
C
L1
= C
L2
= 100pF,
see figures 3 & 6
C
L
= 100pF;
See figures 4 & 7;
S
2
closed
C
L
= 100pF;
See figures 4 & 7;
S
1
closed
C
L
= 15pF;
See figures 4 & 7;
S
1
closed
C
L
= 15pF;
See figures 4 & 7;
S
2
closed
2000
kbps
ns
ns
Figures 3 & 8
Figures 3 & 8
t
PLH
; R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF;
R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF;
C
RL
= 15pF;
Figures 2 & 9;
S
1
closed
C
RL
= 15pF;
Figures 2 & 9;
S
2
closed
C
RL
= 15pF;
Figures 2 & 9;
S
1
closed
C
RL
= 15pF;
Figures 2 & 9;
S
2
closed
50
50
50
50
ns
ns
ns
ns
50
200
600
2000
2000
2500
2500
ns
ns
ns
ns
ns
RE = 5V, DE = 0V
C
L
= 100pF;
See figures 4 & 7;
S
2
closed
C
L
= 100pF;
See figures 4 & 7;
S
1
closed
C
L
= 15pF;
See figures 4 & 7;
S
2
closed
C
L
= 15pF;
See figures 4 & 7;
S
1
closed
RO 1
RE 2
DE 3
DI 4
R
8
7
6
V
CC
B
A
GND
PIN FUNCTION
Pin# Name Description
1
2
3
RO
RE
DE
DI
GND
A
B
Vcc
Receiver Output.
Receiver Output Enable
Active LOW.
Driver Output Enable
Active HIGH.
Driver Input.
Ground Connection.
Driver Output/Receiver Input
Non-inverting.
Driver Output/Receiver Input
Inverting.
Positive Supply 4.75V<Vcc< 5.25V.
© Copyright 2002 Sipex Corporation
D
SP485
Top View
5
4
5
6
7
8
SP481, SP483, SP485
Pinout (Top View)
Rev. 07/16/02
SP481/483/485 Low Power Half-Duplex RS485 Transceivers
4
SIPEX [ SIPEX CORPORATION ]
