SP481E_07 Datasheet, PDF (2/11 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 (V_CC+0.5V)
Drivers..................................................-0.3V to (V_CC+0.5V)
Receivers................................................................. ±15V
Output Voltages
Logic........................................................-0.3V to (V_CC+0.5V)
Drivers...................................................................... ±15V
Receivers............................................-0.3V to (V_CC+0.5V)
Storage Temperature.......................................................-65˚C to +150˚C
Power Dissipation per Package
8-pin NSOIC (derate 6.60mW/^oC above +70^oC)...........................550mW
8-pin PDIP (derate 11.8mW/^oC above +70^oC)............................1000mW
ELECTRICAL CHARACTERISTICS
T_MIN to T_MAX and V_CC = 5V ± 5% unless otherwise noted.
PARAMETERS
SP481E/SP485E DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage
MIN.
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
SP481E/SP485E DRIVER
AC Characteristics
Maximum Data Rate
10
Driver Input to Output
20
Driver Input to Output
20
(SP485EMN ONLY)
TYP.
30
30
MAX. UNITS CONDITIONS
V_CC Volts
V_CC Volts
V_CC Volts
Unloaded; R = ∞ ; see Figure 1
with load; R = 50Ω; (RS-422);
see Figure 1
with load; R = 27Ω; (RS-485);see Figure 1
0.2 Volts
3 Volts
Volts
0.8 Volts
±10 µA
±250 mA
±250 mA
R = 27Ω or R = 50Ω; see Figure 1
R = 27Ω or R = 50Ω; see Figure 1
Applies to DE, DI, RE
Applies to DE, DI, RE
Applies to DE, DI, RE
-7V ≤ V_O ≤ +12V
-7V ≤ V_O ≤ +12V
Mbps
60 ns
80 ns
RE = 5V, DE = 5V; R_DIFF = 54Ω,
C_L1 = C_L2 = 100pF
t_PLH; R_DIFF = 54Ω, C_L1 = C_L2 = 100pF;
see Figures 3 and 5
t_PLH; R_DIFF = 54Ω, C_LI = C_L2 = 100pF;
See Figures 3 and 5
Driver Input to Output
20
30
60 ns
t_PHL; R_DIFF = 54Ω, C_L1 = C_L2 = 100pF;
see Figures 3 and 5
Driver Input to Output
(SP485EMN ONLY)
20
30
80 ns
t_PHL; R_DIFF = 54Ω, C_L1 = C_L2 = 100pF;
see Figures 3 and 5
Driver Skew
5
10 ns
see Figures 3 and 5,
t_SKEW = | t_DPLH - t_DPHL |
Driver Rise or Fall Time
3
15
40 ns
From 10% to 90%; R_DIFF = 54Ω,
C_L1 = C_L2 = 100pF; see Figures 3 & 6
Driver Enable to Output High
40
70 ns
C_L = 100pF; see Figures 4 & 6; S₂
closed
Driver Enable to Output Low
closed
40
70 ns
C_L = 100pF; see Figures 4 & 6; S₁
Driver Disable Time from Low
closed
40
70 ns
C_L = 100pF; see Figures 4 & 6; S₁
Driver Disable Time from High
closed
40
70 ns
C_L = 100pF; see Figures 4 & 6; S₂
May11-2007
SP481E Low Power Half-Duplex RS485 Transceivers
2
© 2007 Sipex Corporation