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SP3490 Datasheet Preview

SP3490 Datasheet

3.3V Low Power Full-Duplex RS-485 Transceivers

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SP3490 / SP3491
3.3V Low Power Full-Duplex RS-485 Transceivers
with 10Mbps Data Rate
Description
The SP3490 and SP3491 devices are 3.3V low power full-duplex
transceivers that meet the specifications of the RS-485 and RS-422
serial protocols. These devices are pin-to-pin compatible with the
MaxLinear SP490 and SP491 devices as well as popular industry
standards. The SP3490 and SP3491 feature MaxLinear’s BiCMOS
process, allowing low power operation without sacrificing performance.
The SP3490 and SP3491 meet the electrical specifications of the
RS-485 and RS-422 serial protocols up to 10Mbps under load. The
SP3491 is identical to the SP3490 with the addition of driver and
reciveiver tri-state enable lines.
Block Diagrams
FEATURES
■■ Full-duplex RS-485 and RS-422
transceivers
■■ Operates from a single 3.3V supply
■■ Interoperable with 5.0V logic
■■ Driver/receiver tri-state enable lines
(SP3491)
■■ -7V to 12V common-mode input voltage
range
■■ ±200mV receiver input sensitivity
■■ Allows up to 32 transceivers on the serial
bus
■■ Compatability with LTC490 and SN75179
(SP3490)
■■ Compatability with LTC491 and SN75180
(SP3491)
Ordering Information - Back Page
VCC 1
R2
D3
GND 4
R
D
SP3490
8A
7B
6Z
5Y
NC 1
R2
REB
DE
3
4
D5
6
GND
GND
7
R
D
SP3491
14
13
VCC
NC
12 A
11 B
10 Z
9Y
8 NC
REV 1.0.3
1/12




MaxLinear

SP3490 Datasheet Preview

SP3490 Datasheet

3.3V Low Power Full-Duplex RS-485 Transceivers

No Preview Available !

SP3490 / SP3491
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................................................................................ 6.0V
Input Voltages
Logic...................................... -0.3V to 6.0V
Drivers................................... -0.3V to 6.0V
Receivers............................................ ±14V
Output Voltages
Drivers................................................ ±14V
Receivers............................... -0.3V to 6.0V
Storage Temperature..................................-65˚C to +150˚C
Maximum Junction Temperature, TJ...........................125˚C
Power Dissipation
8-pin NSOIC............................................................. 600mW
(derate 6.90mW/°C above +70°C)
14-pin NSOIC .......................................................... 700mW
(derate 8.33mW/°C above +70°C)
Operating Conditions
Package Power Dissipation
8-pin NSOIC ѲJA................................................. 128.4˚C/W
14-pin NSOIC ѲJA................................................. 88.2˚C/W
ESD Rating
Human Body Model (HBM)........................................... ±2kV
Electrical Characteristics
TAMB = TMIN to TMAX and VCC = 3.3V ±5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX.
SP3490 Driver DC Characteristics
Differential output voltage
Differential output voltage
Differential output voltage
Change in magnitude of driver
differential output voltage for
complimentary states
Driver common-mode output voltage
Input high voltage
Input low voltage
Input current
Driver short circuit current
VOUT = HIGH
Driver short circuit current
VOUT = LOW
SP3490 Driver AC Characteristics
Maximum data rate
Driver input to output, tPLH
Driver input to output, tPHL
2
1.5
2.0
10
20
20
Vcc
Vcc
Vcc
0.2
3
0.8
±10
±250
±250
40 60
40 60
UNITS
V
V
V
V
V
V
V
µA
mA
mA
Mbps
ns
ns
CONDITIONS
Unloaded; R = ∞Ω ; Figure 1
With load; R = 50Ω (RS-422); Figure 1
With load; R = 27Ω (RS-485); Figure 1
R = 27Ω or R = 50Ω; Figure 1
R = 27Ω or R = 50Ω; Figure 1
-7V ≤ VO ≤ 12V; Figure 8
-7V ≤ VO ≤ 12V; Figure 8
R = 27Ω, Figures 2 & 9
R = 27Ω, Figures 2 & 9
REV 1.0.3
2/12


Part Number SP3490
Description 3.3V Low Power Full-Duplex RS-485 Transceivers
Maker MaxLinear
Total Page 12 Pages
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