SP481_04 Datasheet, PDF (4/10 Pages) Sipex Corporation – Low Power Half-Duplex RS-485 Transceivers

SP483 AC SPECIFICATIONS
T_MIN to T_MAX and V_CC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN.
SP483 DRIVER
AC Characteristics
Maximum Data Rate
250
Driver Input to Output
250
Driver Skew
250
Driver Rise and Fall Time
250
Driver Enable to Output High 250
Driver Enable to Output Low 250
Driver Disable Time from Low 300
Driver Disable Time from High 300
TYP.
800
800
100
SP483 RECEIVER
AC Characteristics
Maximum Data Rate
250
Receiver Input to Output
250
Diff. Receiver Skew It_PLH-t_PHLI
100
Receiver Enable to
Output Low
20
Receiver Enable to
Output High
20
Receiver Disable from Low
20
Receiver Disable from High
20
SP483
Shutdown Timing
Time to Shutdown
50
200
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
MAX. UNITS CONDITIONS
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|
From 10% to 90%; R_DIFF = 54Ω,
C_L1 = C_L2 = 100pF, see figures 3 & 6
C_L = 100pF; See figures 4 & 7; S₂ closed
C_L = 100pF; See figures 4 & 7; S₁ closed
C_L = 15pF; See figures 4 & 7; S₁ closed
C_L = 15pF; See figures 4 & 7; S₂ closed
2000
50
50
50
50
kbps
ns
ns
ns
ns
ns
ns
t_PLH; R_DIFF = 54Ω, C_L1 = C_L2 = 100pF;
Figures 3 & 8
R_DIFF = 54Ω, C_L1 = C_L2 = 100pF;
Figures 3 & 8
C_RL = 15pF; Figures 2 & 9; S₁ closed
C_RL = 15pF; Figures 2 & 9; S₂ closed
C_RL = 15pF; Figures 2 & 9; S₁ closed
C_RL = 15pF; Figures 2 & 9; S₂ closed
600
ns RE = 5V, DE = 0V
2000
ns
C_L = 100pF; See figures 4 & 7; S₂ closed
2000
ns
C_L = 100pF; See figures 4 & 7; S₁ closed
2500 ns
C_L = 15pF; See figures 4 & 7; S₂ closed
2500 ns
C_L = 15pF; See figures 4 & 7; S₁ closed
RO 1
R
8 V_CC
RE 2
7B
DE 3
6A
D
DI 4
SP485 ^{5 GND}
Top View
SP481, SP483, SP485
Pinout (Top View)
PIN FUNCTION
Pin# Name Description
1 RO Receiver Output.
2 RE Receiver Output Enable
Active LOW.
3 DE Driver Output Enable
Active HIGH.
4 DI Driver Input.
5 GND Ground Connection.
6 A Driver Output/Receiver Input
Non-inverting.
7 B Driver Output/Receiver Input
Inverting.
8 Vcc Positive Supply 4.75V<Vcc< 5.25V.
Rev. 07/16/02
SP481/483/485 Low Power Half-Duplex RS485 Transceivers
4
© Copyright 2002 Sipex Corporation