SP481E Просмотр технического описания (PDF) - Signal Processing Technologies
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SP481E Datasheet PDF : 11 Pages
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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.
VCC..........................................................................................................+7V
Input Voltages
Logic........................................................-0.3V to (VCC+0.5V)
Drivers..................................................-0.3V to (VCC+0.5V)
Receivers................................................................. ±15V
Output Voltages
Logic........................................................-0.3V to (VCC+0.5V)
Drivers...................................................................... ±15V
Receivers............................................-0.3V to (VCC+0.5V)
Storage Temperature.......................................................-65˚C to +150˚C
Power Dissipation per Package
8-pin NSOIC (derate 6.60mW/oC above +70oC)...........................550mW
8-pin PDIP (derate 11.8mW/oC above +70oC)............................1000mW
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
PARAMETERS
SP481E/SP485E DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage
MIN.
GND
2
TYP.
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
VOUT = HIGH
VOUT = LOW
SP481E/SP485E DRIVER
AC Characteristics
Maximum Data Rate
10
Driver Input to Output
20
30
Driver Input to Output
(SP485EMN ONLY)
20
30
Driver Input to Output
20
30
Driver Input to Output
(SP485EMN ONLY)
Driver Skew
20
30
5
Driver Rise or Fall Time
3
15
Driver Enable to Output High
40
closed
Driver Enable to Output Low
40
closed
Driver Disable Time from Low
40
closed
Driver Disable Time from High
40
closed
ELECTRICAL CHARACTERISTICS
MAX. UNITS CONDITIONS
VCC Volts
VCC Volts
VCC 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 ≤ VO ≤ +12V
-7V ≤ VO ≤ +12V
Mbps
60 ns
80 ns
60 ns
80 ns
10 ns
40 ns
70 ns
70 ns
70 ns
70 ns
RE = 5V, DE = 5V; RDIFF = 54Ω,
CL1 = CL2 = 100pF
tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see Figures 3 and 5
tPLH; RDIFF = 54Ω, CLI = CL2 = 100pF;
See Figures 3 and 5
tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see Figures 3 and 5
tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see Figures 3 and 5
see Figures 3 and 5,
tSKEW = | tDPLH - tDPHL |
From 10% to 90%; RDIFF = 54Ω,
CL1 = CL2 = 100pF; see Figures 3 & 6
CL = 100pF; see Figures 4 & 6; S2
CL = 100pF; see Figures 4 & 6; S1
CL = 100pF; see Figures 4 & 6; S1
CL = 100pF; see Figures 4 & 6; S2
Date: 02/24/05
SP481E Low Power Half-Duplex RS485 Transceivers
2
© Copyright 2005 Sipex Corporation
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