SP3490 Datasheet, PDF (5/11 Pages) Sipex Corporation – +3.3V Low Power Full Duplex RS-485 Transceivers with 10Mbps Data Rate

SPECIFICATIONS
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
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
V_OUT = LOW
SP3491 DRIVER
AC Characteristics
Maximum Data Rate
10
Driver Input to Output, t_PLH
20
40
Driver Input to Output, t_PHL
20
40
Differential Driver Skew
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
MAX. UNITS CONDITIONS
V_CC Volts Unloaded; R = ∞; Figure 1
V_CC Volts With Load; R = 50Ω; (RS-422);
Figure 1
V_CC Volts With Load; R = 27Ω; (RS-485); Figure 1
0.2
3
0.8
+10
+250
+250
Volts
Volts
Volts
Volts
µA
mA
mA
R = 27Ω or R = 50Ω; Figure 1
R = 27Ω or R = 50Ω; 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 Figures 2 and 8
60
ns Figures 2 and 8
ns
t_PHL(Y) - t_PLH(Y) , t_PHL(Z) - t_PLH(Z) ,
Figures 2 and 8
20
ns From 10% to 90%; Figures 3 and 9
120
ns Figures 4 and 10
120
ns Figures 5 and 10
120
ns Figures 5 and 10
120
ns Figures 4 and 10
NOTE 1: The input pulse is supplied by a generator with the following characteristics:
PRR=250KHz, 50% duty cycle, t_r < 6.0ns, Z₀=50Ω.
NOTE 2: C_L includes probe and stray capacitance.
Rev. 10/11/02
SP3490/3491 Low Power Full-Duplex RS485 Transceivers
5
© Copyright 2002 Sipex Corporation