SP481E Datasheet, PDF (2/12 Pages) Sipex Corporation – Enhanced 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...................................................550mW
(derate 6.60mW/ºC above +70ºC)
8-pin PDIP....................................................1000mW
(derate 11.8mW/ºC above +70ºC)
T_MIN to T_MAX and V_CC = +5.0V +/-5% unless otherwise noted.
PARAMETERS
MIN. TYP.
SP481E/SP485E DRIVER
DC Characteristics
Differential Output Voltage
GND
Differential Output Voltage
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
V_OUT = LOW
SP481E/SP485E DRIVER
AC Characteristics
Max. Transmission Rate
10
Driver Input to Output, t_PLH
Driver Input to Output, t_PLH
(SP485EMN ONLY)
Driver Input to Output, t_PHL
Driver Input to Output, t_PHL
(SP485EMN ONLY)
Driver Skew
20
30
20
30
20
30
20
30
5
Driver Rise or Fall Time
3
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
Volts
Volts
µA
Applies to DE, DI, RE
Applies to DE, DI, RE
Applies to DE, DI, RE
+/-250
+/-250
mA -7V ≤ V_O ≤ +12V
mA -7V ≤ V_O ≤ +12V
Mbps
RE = 5V, DE = 5V; R_DIFF = 54Ω,
C_L1 = C_L2 = 100pF
60
ns
See Figures 3 & 5, R_DIFF = 54Ω,
80
ns
C_L1 = C_L2 = 100pF
60
ns
See Figures 3 & 5, R_DIFF = 54Ω,
80
ns
C_L1 = C_L2 = 100pF
10
ns see 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 6
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP481E,485E_100_121808