SP1481E Datasheet, PDF (2/10 Pages) Sipex Corporation – ±15kV 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
ELECTRICAL CHARACTERISTICS
T_MIN to T_MAXand V_CC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN. TYP.
MAX. UNITS CONDITIONS
SP1481E/SP1485E driver
DC Characteristics
Differential Output Voltage
3.5
Differential Output Voltage
2
V_CC Volts
V_CC Volts
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
V_CC Volts
0.2 Volts
3 Volts
Volts
0.8 Volts
±10 μA
±250 mA
±250 mA
SP1481E/SP1485E driver
AC Characteristics
Maximum Data Rate
20
Mbps

Driver Input to Output
20
30 ns
Driver Input to Output
(SP1485EMN ONLY)
20
40 ns
Unloaded; R = ∞; see Figure 1
with load; R = 50Ω; (RS-422);
see Figure 1
with load; R = 27Ω; (RS-485);see Figure 1
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
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 ns
Driver Input to Output
20
40 ns
(SP1485EMN ONLY)
Driver Skew
3
5 ns

Driver Rise or Fall Time
8
20 ns

Driver Enable to Output High
40
70 ns
Driver Enable to Output Low
40
70 ns
Driver Disable Time from Low
40
70 ns
Driver Disable Time from High
40
70 ns
t_PHL; R_DIFF = 54Ω, C_L1 = C_L2 = 100pF;
see Figures 3 and 5
t_PHL; R_DIFF = 54Ω, C_L1 = C_L2 = 100pF;
see Figures 3 and 5
see Figures 3 and 5,
t_SKEW = | t_PLH - t_PHL |
From 10% to 90%; R_DIFF = 54Ω,
C_L1 = C_L2= 100pF; see Figures 3 & 6
C_L = 100pF; seeFigures 4 & 6; S₂ closed
C_L = 100pF; seeFigures 4 & 6; S₁ closed
C_L = 100pF; seeFigures 4 & 6; S₁ closed
C_L = 100pF; seeFigures4 & 6; S₂ closed
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP1481E-1485E_100_061609