SP3481 Datasheet, PDF (2/9 Pages) Sipex Corporation – +3.3V Low Power Half-Duplex RS-485 Transceivers with 10Mbps Data Rate

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 ............................................................................................. +6.0V
Input Voltages
Logic ..................................................... -0.3V to +6.0V
Drivers ................................................... -0.3V to +6.0V
Receivers ............................................................ ±15V
Output Voltages
Drivers .................................................................. ±15V
Receivers .............................................. -0.3V to +6.0V
Storage Temperature ................................................ .-65˚C to +150˚C
Power Dissipation per Package
8-pin NSOIC (derate 6.90mW/^oC above +70^oC) ..................... 600mW
8-pin PDIP (derate 11.8mW/^oC above +70^oC) ...................... 1000mW
SPECIFICATIONS
T_AMB = T_MIN to T_MAX and V_CC = +3.3V ± 5% unless otherwise noted.
PARAMETERS
MIN. TYP.
SP3481/SP3485 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
SP3481/SP3485 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 Time from Low
40
Driver Disable Time from High
60
SP3481/SP3485 RECEIVER
DC Characteristics
Differential Input Threshold -0.2
Input Hysteresis
20
Output Voltage High
Output Voltage Low
V_CC-0.4
Three-State (High Impedance)
Output Current
Input Resistance
12
15
Input Current (A, B); V_IN = 12V
Input Current (A, B); V_IN = -7V
Short-Circuit Current
7
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 R = 27Ω or R = 50Ω; Figure 1
Volts
Volts
Volts
µA
R = 27Ω or R = 50Ω; Figure 1
Applies to DE, DI, RE
Applies to DE, DI, RE
Applies to DE, DI, RE
mA -7V ≤ V_O ≤ +12V
mA -7V ≤ V_O ≤ +12V
Mbps RE = V_CC, DE = V_CC
60
ns Figures 2 and 8
60
ns Figures 2 and 8
10
ns t_DO1 - t_DO2 Figures 2 and 9
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
+0.2
0.4
+1
1.0
-0.8
60
Volts
mV
Volts
Volts
µA
kΩ
mA
mA
mA
-7V ≤ V_CM ≤ +12V
V_CM = 0V
V_ID = +200mV, -1.5mA
V_ID = -200mV, 2.5mA
0V ≤ V_O ≤ V_CC; RE = V_CC
-7V ≤ V_CM ≤ +12V
DE = 0V, V_CC = 0V or 3.6V, V_IN = 12V
DE = 0V, V_CC = 0V or 3.6V, V_IN = -7V
0V ≤ V_CM ≤ V_CC
10/15/02
SP3481/3485 Low Power Half-Duplex RS485 Transceivers
2
© Copyright 2000 Sipex Corporation