SP481_04 Datasheet, PDF (2/10 Pages) Sipex Corporation – Low Power Half-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........................................................................................................±12V
Input Voltages
Logic........................................................-0.3V to (V_CC+0.5V)
Drivers..................................................-0.3V to (V_CC+0.5V)
Receivers................................................................. ±15V
Output Voltages
Logic........................................................-0.3V to (V_CC+0.5V)
Drivers...................................................................... ±15V
Receivers............................................-0.3V to (V_CC+0.5V)
Storage Temperature.......................................................-65˚C to +150˚C
Power Dissipation...........................................................................500mW
T_MIN to T_MAX and V_CC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN.
SP481/SP483/SP485 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
SP481/SP485 DRIVER
AC Characteristics
Maximum Data Rate
5
Driver Input to Output
Driver Input to Output
Driver Skew
Driver Rise or Fall Time
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
MAX.
V_CC
V_CC
V_CC
0.2
3
0.8
±10
250
250
60
60
10
40
70
70
70
70
ELECTRICAL CHARACTERISTICS
UNITS CONDITIONS
Volts
Volts
Volts
Unloaded; R = ∞ ; see figure 1
with load; R = 50Ω; (RS422);
see figure 1
with load; R = 27Ω; (RS485); see figure 1
Volts
Volts
Volts
Volts
µA
mA
mA
R = 27Ω or R = 50Ω; see figure 1
R = 27Ω or R = 50Ω; see figure 1
Applies to DE, DI, RE
Applies to DE, DI, RE
Applies to DE, DI, RE
-7V ≤ V_O ≤ +12V
-7V ≤ V_O ≤ +12V
Mbps
ns
ns
ns
ns
ns
ns
ns
ns
RE = 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_L = 100pF; see figures 4 & 7; S₂ closed
C_L = 100pF; see figures 4 & 7; S₁ closed
C_L = 15pF; see figures 2 & 9; S₁ closed
C_L = 15pF; see figures 2 & 9; S₂ closed
SP481/SP483/SP485 RECEIVER
DC Characteristics
Differential Input Threshold
+0.2 Volts -7V ≤ V_CM ≤ +12V
Input Hysteresis
10
mV
V_CM = 0V
Output Voltage High
2.4
5
Volts I_O = -4mA,V_ID = +200mV
Output Voltage Low
0.0
0.4 Volts I_O = +4mA,V_ID = -200mV
Three-State (High Impedance)
Output Current
Input Resistance
Input Current (A, B); V_IN = 12V
Input Current (A, B); V_IN = -7V
Short-Circuit Current
±1
µA
0.4V ≤ V_O ≤ 2.4V; RE = 5V
15
kΩ
-7V ≤ V_CM ≤ +12V
+1.0 mA
DE = 0V, V_CC = 0V or 5.25V, V_IN = 12V
-0.8 mA
DE = 0V, V_CC = 0V or 5.25V, V_IN = -7V
95
mA
0V ≤ V_CM ≤ V_CC
Rev. 07/28/04
SP481/483/485 Low Power Half-Duplex RS485 Transceivers
2
© Copyright 2002 Sipex Corporation