SP3490 Datasheet, PDF (4/12 Pages) Sipex Corporation – +3.3V Low Power Full Duplex RS-485 Transceivers with 10Mbps Data Rate

T_AMB = T_MIN to T_MAX and V_CC = +3.3V +/-5% unless otherwise noted.
PARAMETERS
MIN. TYP.
SP3491 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
SP3491 DRIVER
AC Characteristics
Max. Transmission Rate
10
Driver Input to Output, t_PLH
Driver Input to Output, t_PHL
Differential Driver Skew
20
40
20
40
2
Driver Rise or Fall Time
5
Driver Enable to Output HIGH
52
Driver Enable to Output LOW
60
Driver Disable from LOW
40
Driver Disable from HIGH
60
ELECTRICAL CHARACTERISTICS
MAX. UNITS CONDITIONS
Vcc
Volts Unloaded; R = ∞Ω ; Figure 1
Vcc
Volts With Load; R = 50Ω (RS-422);
Figure 1
Vcc
Volts With Load; R = 27Ω (RS-485);
Figure 1
0.2
Volts R = 27Ω or R = 50Ω; Figure 1
3
Volts R = 27Ω or R = 50Ω; Figure 1
0.8
+/-10
Volts
Volts
µA
Applies to DE, D, REB
Applies to DE, D, REB
Applies to DE, D, REB
+/-250
+/-250
mA -7V ≤ V_O ≤ +12V; Figure 8
mA -7V ≤ V_O ≤ +12V; Figure 8
Mbps
60
ns Figures 2 & 9
60
ns Figures 2 & 9
ns
|t_PHL(Y)- t_PLH(Y)|, |t_PHL(Z)- t_PLH(Z)|,
Figures 2 and 9
20
ns From 10%-90%; Figures 3 and 10
120
ns Figures 4 and 11
120
ns Figures 5 and 11
120
ns Figures 5 and 11
120
ns Figures 4 and 11
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP3490_3491_102_102710