SP483_17 Datasheet, PDF (3/13 Pages) Exar 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.......................................................................+7V
Input Voltages
Logic.........................-0.3V to (Vcc + 0.5V)
Drivers......................-0.3V to (Vcc + 0.5V)
Receivers.........................................+/-15V
Output Voltages
Logic.........................-0.3V to (Vcc + 0.5V)
Drivers.............................................+/-15V
Receivers..................-0.3V to (Vcc + 0.5V)
Storage Temperature.......................-65˚C to +150˚C
Power Dissipation
8-pin NSOIC...................................................500mW
T_MIN to T_MAX and V_CC = 5V +/-5% unless otherwise noted.
PARAMETERS
MIN.
SP483/SP485 DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage
2
TYP.
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
Driver Short Circuit Current,
V_OUT = LOW
SP485 DRIVER
AC Characteristics
Maximum Data Rate
5
Driver Input to Output, t_PLH
30
Driver Input to Output, t_PHL
30
Driver Skew
5
Driver Rise or Fall Time
15
ELECTRICAL CHARACTERISTICS
MAX. UNITS CONDITIONS
Vcc
Volts Unloaded; R = ∞ ; see figure 1
Vcc
Volts With Load; R = 50Ω (RS-422);
see figure 1
Vcc
Volts With Load; R = 27Ω (RS-485);
see figure 1
0.2
Volts R = 27Ω or R = 50Ω; see figure 1
3
Volts R = 27Ω or R = 50Ω; see figure 1
0.8
+/-10
250
250
Volts
Volts
µA
mA
Applies to DE, DI, RE
Applies to DE, DI, RE
Applies to DE, DI, RE
-7V ≤ V_O ≤ +12V
mA -7V ≤ V_O ≤ +12V
Mbps RE = 5V, DE = 5V
60
ns
Figures 3 and 5, R_DIFF = 54Ω,
C_L1 = C_L2 = 100pF
60
ns
Figures 3 and 5, R_DIFF = 54Ω,
C_L1 = C_L2 = 100pF
10
ns Figures 3 and 5,
t_SKEW = |t_DPHL - t_DPLH|
40
ns
From 10%-90%; R_DIFF = 54Ω
C_L1 = C_L2 = 100pF; see figures 3
and 5
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP483_485_101_062711