SP490_05 Datasheet, PDF (5/12 Pages) Sipex Corporation – Full Duplex RS-485 Transceivers

ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at
these ratings or any other above those indicated in the operation sections
of the specifications below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect reliability.
V_CC............................................................................................................................+7V
Input Voltages
Logic...................................................-0.5V to (V_CC+0.5V)
Drivers................................................-0.5V to (V_CC+0.5V)
Receivers..................................................................±14V
Output Voltages
Logic...................................................-0.5V to (V_CC+0.5V)
Drivers......................................................................±14V
Receivers...........................................-0.5V to (V_CC+0.5V)
Storage Temperature......................................................-65˚C to +150
Power Dissipation.....................................................................1000mW
T_MIN to T_MAX and V_CC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN.
SP491 DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage
GND
2
Differential Output Voltage
1.5
Change in Magnitude of Driver
Differential Output Voltage for
Complimentary States
Driver Common-Mode
Output Voltage
Input High Voltage
2.0
Input Low Voltage
Input Current
Driver Short-Circuit Current
V_OUT = HIGH
35
V_OUT = LOW
35
SP491 DRIVER
AC Characteristics
Maximum Data Rate
5
Driver Input to Output
20
Driver Input to Output
20
Driver Skew
Driver Rise or Fall Time
3
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
TYP.
30
30
5
15
40
40
40
40
ELECTRICAL CHARACTERISTICS
MAX. UNITS CONDITIONS
V_CC Volts
V_CC Volts
V_CC Volts
Unloaded; R = ∞ ; see figure 1
With Load; R = 50Ω; (RS422);
see figure 1
With Load; R = 27Ω; (RS485); see figure 1
0.2 Volts
3 Volts
Volts
0.8 Volts
±10 µA
250 mA
250 mA
R = 27Ω or R = 50Ω; see figure 1
R = 27Ω or R = 50Ω; see figure 1
Applies to D, REB, DE
Applies to D, REB, DE
Applies to D, REB, DE
-7V ≤ V_O ≤ 12V
-7V ≤ V_O ≤ 12V
Mbps
60 ns
60 ns
10 ns
40 ns
70 ns
70 ns
70 ns
70 ns
REB = 5V, DE = 5V
t_PLH; R_DIFF = 54Ω, C_L1 = C_L2 = 100pF;
see figures 3 and 6
t_PHL; R_DIFF = 54Ω, C_L1 = C_L2 = 100pF;
see figures 3 and 6
see figures 3 and 6,
t_SKEW = | t_DPLH - t_DPHL |
From 10% to 90%; R_DIFF = 54Ω,
C_L1 = C_L2 = 100pF; see figures 3 and 6
C_L1 = C_L2 = 100pF; see figures
4 and 7; S₂ closed
C_L1 = C_L2 = 100pF; see figures
4 and 7; S₁ closed
C_L1 = C_L2 = 100pF; see figures
4 and 7; S₁ closed
C_L1 = C_L2 = 100pF; see figures
4 and 7; S₂ closed
Date: 02/24/05
SP490/491 Full Duplex RS-485 Transceivers
5
© Copyright 2005 Sipex Corporation