SP331
Programmable Dual RS-232/RS-485 Transceiver
Description
FEATURES
■■ +5V Only Operation
■■ Software Programmable RS-232 or
RS-485 Selection
■■ Four RS-232 Transceivers in RS-232 Mode
■■ Two RS-485 Full-Duplex Transceivers in
RS-485 Mode
■■ Two RS-232 Transceivers and One
RS-485 Transceiver in Dual Mode
■■ Self-Testing Loopback Mode
■■ Full Driver Tri-State (Hi-Z) Control
■■ Ideal for RS-232 to RS-485 conversion
The SP331 is a programmable RS-232 and/or RS-485 transceiver IC.
The SP331 contains four drivers and four receivers when selected in
RS-232 mode; and two drivers and two receivers when selected in
RS-485 mode. The SP331 also contains a dual mode which has two
RS-232 drivers/receivers plus one differential RS-485 driver/receiver.
The RS-232 transceivers can typically operate at 230kbps while
adhering to the RS-232 specifications. The RS-485 transceivers can operate up to 10Mbps while adhering to the RS-485
specifications. The SP331 includes a self-test loopback mode where
the driver outputs are internally configured to the receiver inputs.
This allows for easy diagnostic serial port testing without using an
external loopback plug. The RS-232 and RS-485 drivers can be disabled
(High-Z output) by controlling a set of four select pins.
Ordering Information - Back Page
Typical Applications Circuit
+5V
9
0.1µF
12
11
0.1µF
+5V
+5V
13
5
VCC
C1+
C1-
SP331
C2+
SEL D
Vcc
TTL/CMOS
26 TI1
27
TI2
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
1
T1
Vcc
20
TX4 3
22
T3
TX3 4
RI2 16
R1
RX2
21 RX3
23
TX1 6
TI4
19 RX1
14
TX2 7
400KΩ
28 TI3
V-
0.1µF
10
0.1µF
C224
SEL A
2
SEL B
400KΩ
TTL/CMOS
V+
15KΩ
RI1 15
15KΩ
RI4 18
R3
15KΩ
RI3 17
0V
RS-485
RS-485
RS-485
RS-485
RS-485
RS-485
RS-485
RS-485
15KΩ
RX4
8 GND
SEL C
REV 1.0.1
25
0V
1/13
SP331
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.
Storage Temperature..................................-65˚C to +150˚C
VCC................................................................................. +7V
Input Voltages
ѲJA................................................. 40˚C/W
Logic......................... -0.5V to (VCC + 0.5V)
NOTE:
1. Exceeding the maximum data rate of 8Mbps at TA = 85˚C may permanently
damage the device.
Drivers...................... -0.5V to (VCC + 0.5V)
Power Dissipation
28-pin WSOIC.............................. 1000mW
Package Derating
28-pin WSOIC
Receivers.........................±30V @ ≤100mA
Driver Outputs.............................................................. ±15V
Maximum Data Rate................................................ 8Mbps(1)
Electrical Characteristics
Limits are specified at TA = 25°C and VCC = +5.0V unless otherwise noted.
PARAMETER
MIN.
TYP.
MAX.
UNITS
0.8
V
CONDITIONS
Logic Inputs
VIL
VIH
2.0
V
Logic Outputs
VOL
VOH
0.4
2.4
V
IOUT = -3.2mA
V
IOUT = 1.0mA
RS-232 Driver
DC Characteristics
HIGH Level Output
+5.0
+15.0
V
RL = 3kΩ, VIN = 0.8V
LOW Level Output
-15.0
-5.0
V
RL = 3kΩ, VIN = 2.0V
-15
+15
V
±100
mA
Open Circuit Voltage
Short Circuit Current
Power Off Impedance
300
Ω
VOUT = 0V
VCC = 0V, VOUT = ±2.0V
AC Characteristics
Slew Rate
30
V/µs
Transistion Time
1.5
µs
Maximum Data Rate
120
235
kbps
Propagation Delay tPHL
2
8
µs
Propagation Delay tPLH
2
8
µs
1.7
3.0
V
RL = 3kΩ, CL = 50pF; VCC = +5.0V, TA @ 25°C
RL = 3kΩ, CL = 2500pF; between ±3V,
TA @ +25°C
RL = 3kΩ, CL = 2500pF
Measured from 1.5V of VIN to 50% of VOUT;
RL = 3kΩ
RS-232 Receiver
DC Characteristics
HIGH Threshold
LOW Threshold
0.8
1.2
Receiver Open Circuit Bias
Input Impedance
3
5
V
+2.0
V
7
kΩ
REV 1.0.1
VIN = +15V to -15V
2/13
SP331
Electrical Characteristics (Continued)
Limits are specified at TA = 25°C and VCC = +5.0V unless otherwise noted.
PARAMETER
MIN.
TYP.
120
235
MAX.
UNITS
CONDITIONS
RS-232 Receiver (Continued)
AC Characteristics
Maximum Data Rate
kbps
Propagation Delay tPHL
0.25
1
µs
Propagation Delay tPLH
0.25
1
µs
6.0
V
5.0
V
RL = 54Ω, CL = 50pF
Balance
±0.2
V
|VT| - |VT|
Common-Mode Output
3.0
V
Measured from 50% of VIN to 1.5V of VOUT
RS-485 Driver
DC Characteristics
Open Circuit Voltage
Differential Output
Output Current
1.5
28.0
Short Circuit Current
±250
mA
RL = 54Ω
mA
Terminated in -7V to +10V
AC Characteristics
Maximum Data Rate
10
Maximum Data Rate
Mbps
RL = 54Ω
8
Mbps
TA = +85°C(1)
Output Transition Time
30
50
ns
Rise/Fall time, 10% - 90%
Propagation Delay tPHL
80
120
ns
Propagation Delay tPLH
80
120
ns
See Figures 2 & 4, RDIFF = 54Ω,
CL1 = CL2 = 100pF
Driver Output Skew
10
20
ns
Per Figure 4, tSKEW = |tPHL - tPLH|
Enable to LOW
90
150
ns
CL = 15pF, S1 Closed
Enable to HIGH
90
150
ns
CL = 15pF, S2 Closed
Disable from LOW
80
120
ns
CL = 15pF, S1 Closed
Disable from HIGH
80
120
ns
CL = 15pF, S2 Closed
+12
V
Enable Timing
Enable Time (see Figures 3 and 5)
Disable Time (see Figures 3 and 5)
RS-485 Receiver
DC Characteristics
Common Mode Range
-7.0
Receiver Sensitivity
Input Impedance
±0.2
12
±0.3
15
V
-7V ≤ VCM ≤ +12V
kΩ
-7V ≤ VCM ≤ +12V
AC Characteristics
Maximum Data Rate
10
Mbps
Maximum Data Rate
8
Mbps
Propagation Delay tPHL
130
200
ns
Propagation Delay tPLH
130
200
ns
Differential Receiver Skew
10
20
ns
REV 1.0.1
TA = +85°C(1)
See Figures 2 & 6, RDIFF = 54Ω,
CL1 = CL2 = 100pF
tSKEW = |tPHL - tPLH|, RDIFF = 54Ω,
CL1 = CL2 = 100pF
3/13
SP331
Electrical Characteristics, Continued
Limits are specified at TA = 25°C and VCC = +5.0V unless otherwise noted.
PARAMETER
MIN.
TYP.
MAX.
UNITS
+5.25
V
CONDITIONS
Power Requirements
Supply Voltage VCC
+4.75
Supply Current ICC
No Load (TX Disabled)
10
15
mA
SEL_A ► SEL_D = "0001"
No Load (RS-232 Mode)
15
30
mA
SEL_A ► SEL_D = "0000"
No Load (RS-485 Mode)
7
20
mA
SEL_A ► SEL_D = "1100"
Environmental
Operating Temperature
Commercial (_C_)
0
70
ºC
Industrial (_E_)
-40
+85
ºC
Storage Temperature
-65
+150
ºC
NOTE:
1. Exceeding the maximum data rate of 8Mbps at TA = 85˚C may permanently damage the device.
Receiver Input Graph
RS-485 RECEIVER
+1.0mA
-7V
-3V
+6V
+12V
1 Unit Load
Maximum Input Current
Versus Voltage
-0.6mA
Test Circuits
R
D
DI
VOD
B
R
Vcc
VOC
Figure 1. Driver DC Test Load Circuit
Output
Under
Test
500Ω
A
S1
CL1
RL
CL2
A
B
RO
15pF
Figure 2. Driver / Receiver Timing Test Circuit
VCC
CL
S2
Figure 3. Driver Timing Test Load #2 Circuit
REV 1.0.1
4/13
SP331
Switching Waveforms
DRIVER INPUT
f ≥ 1MHz; t R ≤ 10ns; t F ≤ 10ns
+3V
DRIVER
OUTPUT
1.5V
0V
B
A
1.5V
t PHL
t PLH
VO 1/2VO
1/2VO
t DPLH
DIFFERENTIAL VO+
OUTPUT 0V
VA – VB VO–
t DPHL
tF
tR
t SKEW = |t DPLH - t DPHL|
Figure 4. Driver Propagation Delays
DE
A, B
A, B
f = 1MHz; t R < 10ns; t F < 10ns
+3V
1.5V
0V
1.5V
t ZL
5V
2.3V
VOL
VOH
2.3V
0V
t LZ
Output normally LOW
0.5V
Output normally HIGH
0.5V
t ZH
t HZ
Figure 5. Driver Enable and Disable Times
A– B
f = 1MHz; t R ≤ 10ns ; t F ≤ 10ns
VOD2 +
0V
VOD2 –
VOH
RECEIVER OUT
VOL
0V
INPUT
1.5V
1.5V
OUTPUT
t PHL
t PLH
Figure 6. Receiver Propagation Delays
REV 1.0.1
5/13
SP331
Switching Waveforms (Continued)
TTL
Input
TTL
INPUT
Driver Output A
Driver Output B
DRIVER
OUTPUT
Differential
Output
VA - VB
Figure 7. Typical RS-232 Driver Output
Figure 8. Typical RS-485 Driver Output
Pinout
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SP331
TI4
SEL_B
TX4
TX3
VCC
TX1
TX2
GND
C1+
V+ (VDD)
C2+
C1–
C2–
V– (VSS)
28
27
26
25
24
23
22
21
20
19
18
17
16
15
TI3
TI2
TI1
SEL_C
SEL_A
SEL_D
RX4
RX3
RX2
RX1
RI4
RI3
RI2
RI1
Figure 9. SP331 Pinout
REV 1.0.1
6/13
SP331
Typical Operating Circuits
+5V
9
0.1µF
0.1µF
0V
0V
+5V
5
C1+
VCC
12 C111
C2+
13
C224
SEL A
2
SEL B
SP331
V+
V-
0.1µF
10
0.1µF
14
0.1µF
0.1µF
SEL D
Vcc
23
+5V
0V
+5V
Vcc
TX1 6
T1
27 TI2
Vcc
TX2 7
T2
400KΩ
TTL/CMOS
28 TI3
Vcc
TX3 4
T3
400KΩ
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
1 TI4
19 RX1
20 RX2
21 RX3
TX4 3
T4
R1
R2
RI1 15
5KΩ
RI2 16
5KΩ
RI3 17
R3
RS-232
TTL/CMOS
TTL/CMOS
26 TI1
Vcc
TTL/CMOS
RS-232
TTL/CMOS
TTL/CMOS
RS-232
TTL/CMOS
TTL/CMOS
RS-232
TTL/CMOS
RS-232
28 TI3
1
TX3 4
RI2 16
R1
RX2
21 RX3
22
T3
TI4
19 RX1
20
TX1 6
TX4 3
400KΩ
RS-232
0.1µF
RX4
8 GND
23
TX2 7
T1
0.1µF
10
V- 14
SEL D
Vcc
27 TI2
V+
SP331
400KΩ
26 TI1
400KΩ
TTL/CMOS
VCC
12 C111
C2+
13
C224
SEL A
2
SEL B
400KΩ
TTL/CMOS
5
9 C1+
15KΩ
RI1 15
0V
RS-485
RS-485
RS-485
RS-485
RS-485
RS-485
15KΩ
RI4 18
R3
15KΩ
RI3 17
RS-485
RS-485
15KΩ
SEL C
25
0V
RS-232
5KΩ
TTL/CMOS
22 RX4
8
GND
R4
RI4 18
5KΩ
SEL C
25
RS-232
0V
Figure 10. Typical Operating Circuits
REV 1.0.1
7/13
SP331
Function Table for Select Pins
A
B
C
D
Mode
Function
0
0
0
0
RS-232
All four RS-232 drivers active
0
0
0
1
RS-232
All four RS-232 drivers tri-state
0
0
1
0
RS-232
All four RS-232 drivers tri-state
0
0
1
1
RS-232
RS-232 (4 ch) Loopback
0
1
0
0
RS-232 / RS-485
T1 and T2 active RS-232; T3 tri-state RS-485
0
1
0
1
RS-232 / RS-485
T1 and T2 tri-state RS-232; T3 active RS-485
0
1
1
0
RS-232 / RS-485
T1 and T2 active RS-232; T3 tri-state RS-485
0
1
1
1
RS-232 / RS-485
RS-232 (2 ch) / RS-485 (1 ch) Loopback
1
0
0
0
RS-485 / RS-232
T1 active RS-485; T3 and T4 active RS-232
1
0
0
1
RS-485 / RS-232
T1 tri-state RS-485; T3 active RS-232; T4 active RS-232
1
0
1
0
RS-485 / RS-232
All RS-485 and RS-232 drivers tri-state
1
0
1
1
RS-485 / RS-232
RS-485 (1 ch) / RS-232 (2 ch) Loopback
1
1
0
0
RS-485
T1 and T3 active RS-485
1
1
0
1
RS-485
T1 tri-state RS-485; T3 active RS-485
1
1
1
0
RS-485
T1 active RS-485; T3 tri-state RS-485
1
1
1
1
RS-485
RS-485 (2 ch) Loopback
Table 1. Mode Function Table (Refer to Control Logic Confirmations for Block Diagrams)
Theory of Operation
The SP331 is made up of four separate circuit blocks: the
charge pump, drivers, receivers, and decoder. Each of
these circuit blocks is described in more detail below.
Charge-Pump
The charge pump is an Exar–patented design (U.S.
5,306,954) and uses a unique approach compared to older
less efficient designs. The charge pump still requires four
external capacitors, but uses a four-phase shifting technique
to attain symmetrical 10V power supplies. Figure 15(a)
shows the waveform found on the positive side of capacitor
C2, and Figure 15(b) shows the negative side of capacitor
C2. There is a free-running oscillator that controls the four
phases of the voltage shifting. A description of each phase
follows.
Phase 1: VSS Charge Storage
During this phase of the clock cycle, the positive side of
capacitors C1 and C2 are initially charged to +5V. C1+ is
then switched to ground and charge on C1– is transferred
to C2–. Since C2+ is connected to +5V, the voltage potential
across capacitor C2 is now 10V.
Phase 2: VSS Transfer
Phase two of the clock connects the negative terminal of
C2 to the VSS storage capacitor and the positive terminal
of C2 to ground, and transfers the generated -10V to C3.
Simultaneously, the positive side of capacitor C 1 is switched
to +5V and the negative side is connected to ground.
Phase 3: VDD Charge Storage
The third phase of the clock is identical to the first phase;
the charge transferred in C1 produces -5V in the negative
terminal of C1, which is applied to the negative side of
capacitor C2. Since C2+ is at +5V, the voltage potential
across C2 is 10V.
Phase 4: VDD Transfer
The fourth phase of the clock connects the negative
terminal of C2 to ground and transfers the generated
10V across C2 to C4, the VDD storage capacitor. Again,
simultaneously with this, the positive side of capacitor C1
is switched to +5V and the negative side is connected to
ground, and the cycle begins again.
Since both V+ and V– are separately generated from VCC in
a no–load condition, V+ and V– will be symmetrical. Older
charge pump approaches that generate V– from V+ will
show a decrease in the magnitude of V– compared to V+
due to the inherent inefficiencies in the design.
The clock rate for the charge pump typically operates at
15kHz. The external capacitors must be 0.1µF with a 16V
breakdown rating.
REV 1.0.1
8/13
SP331
VCC = +5V
VCC = +5V
C4
+5V
C1
+
C2
–
–5V
+
+
–
–
+
–
VDD Storage Capacitor
VSS Storage Capacitor
C4
C1
+
–
C3
–5V
–5V
VDD Storage Capacitor
–
+
VSS Storage Capacitor
C3
VCC = +5V
C4
+5V
–
–
–
Figure 12. Charge Pump Phase 2
VCC = +5V
+
+
–10V
Figure 11. Charge Pump Phase 1
C1
C2
+
C2
+
+
–
–
–
+
VDD Storage Capacitor
VSS Storage Capacitor
+10V
C1
+
C2
–
C3
–5V
+
–
C4
+
–
VDD Storage Capacitor
–
+
VSS Storage Capacitor
C3
Figure 13. Charge Pump Phase 3
Figure 14. Charge Pump Phase 4
+10V
a) C2+
GND
GND
b) C2-10V
Figure 15. Charge Pump Waveforms
REV 1.0.1
9/13
SP331
External Power Supplies
For applications that do not require +5V only, external
supplies can be applied at the V+ and V– pins. The value of
the external supply voltages must be no greater than ±10V.
The current drain for the ±10V supplies is used for RS-232.
For the RS-232 driver the current requirement will be 3.5mA
per driver. The external power supplies should provide a
power supply sequence of: +10V, then +5V, followed by
-10V.
Drivers
The SP331 has four independent RS-232 single-ended
drivers and two differential RS-485 drivers. Control for
the mode selection is done via a four–bit control word.
The drivers are pre-arranged such that for each mode
of operation the relative position and functionality of the
drivers are set up to accommodate the selected interface
mode. As the mode of the drivers is changed, the electrical
characteristics will change to support the requirements of
clock, data, and control line signal levels. Unused driver
inputs can be left floating; however, to ensure a desired
state with no input signal, pull–up resistors to +5V or pull–
down resistors to ground are suggested. Since the driver
inputs are both TTL or CMOS compatible, any value resistor
less than 100kΩ will suffice.
When in RS-232 mode, the single-ended RS-232 drivers
produce compliant RS-232E and ITU V.28 signals. Each
of the four drivers output single-ended bipolar signals in
excess of ±5V with a full load of 3kΩ and 2500pF applied as
specified. These drivers can also operate at least 120kbps.
When programmed to RS-485 mode, the differential RS485 drivers produce complaint RS-485 signals. Each RS485 driver outputs a unipolar signal on each output pin with
a magnitude of at least 1.5V while loaded with a worst case
of 54Ω between the driver’s two output pins. The signal
levels and drive capability of the RS-485 drivers allow the
drivers to also comply with RS-422 levels. The transmission
rate for the differential drivers is 10Mbps.
The RS-232 receiver has a single–ended input with a
threshold of 0.8V to 2.4V. The RS-232 receiver has an
operating voltage range of ±15V and can receive signals up
to 120kbps. RS-232 receivers are used in RS-232 mode for
all signal types include data, clock, and control lines of the
RS-232 serial port.
The differential RS-485 receiver has an input impedance
of 15kΩ and a differential threshold of ±200mV. Since the
characteristics of an RS-422 receiver are actually subsets of
RS-485, the receivers for RS-422 requirements are identical
to the RS-485 receivers. All of the differential receivers can
receive data up to 10Mbps.
Select Mode Pins
Similar to our SP500 family of multiprotocol products, the
SP331 has the ability to change the configuration of the
drivers and receivers via a 4–bit switch. Referring to Table 1;
RS-232 mode, RS-485 mode, or two different combinations
of RS-232/RS-485 can be configured using the SEL_A and
SEL_B pins. The drivers can be put into tri-state mode by
using the SEL_C and SEL_D pins. All receivers remain
active during any tri-state condition of the drivers.
Loopback Mode
Loopback is invoked by asserting “xx11” into the select pins.
In RS-232 / RS-485 or RS-485 / RS-232 loopback mode, the
RS-232 driver outputs loop back into the RS-232 receiver
inputs and the RS-485 differential driver loops back into the
RS-485 receiver. During loopback, the driver outputs and
receiver inputs are disconnected from the outside world.
The driver outputs are in tri-state and the receiver inputs
are disabled. The input impedance of the receivers during
loopback is approximately 15kΩ to ground.
Receivers
The SP331 has four single-ended receivers when
programmed for RS-232 mode and two differential receivers
when programmed for RS-485 mode.
Control for the mode selection is done via a 4–bit control
word, as in the drivers. As the operating mode of the
receivers is changed, the electrical characteristics will
change to support the requirements of the appropriate
serial standard. Unused receiver inputs can be left floating
without causing oscillation. To ensure a desired state of
the receiver output, a pull–up resistor of 100kΩ to +5V
should be connected to the inverting input for a logic low,
or the non–inverting input for a logic high. For single-ended
receivers, a pull–down resistor to ground of 5kΩ is internally
connected, which will ensure a logic high output.
REV 1.0.1
10/13
SP331
SP331 Control Logic Configuration (Refer to Table1)
SEL A
0
0
0
0
0
0
1
1
1
1
1
1
SEL B
0
0
0
1
1
1
0
0
0
1
1
1
SEL C
0
0
1
0
0
1
0
0
1
0
0
1
SEL D
0
1
0
0
1
0
0
1
0
0
1
0
26
TI1
27
TI2
28
TI3
T1
TX1
6
TX2
7
26
TI4
19
RX1
TX1
T1
6
26
T2
TX3
T3
27
T4
R1
20 RX2
R2
21 RX3
R3
TX4
3
RI1
15
RI2
R4
T2
TX2
7
TX3
4
TX4
3
28
TI3
T3
19 RX1
R1
RI1
TI1
TI3
TX1 6
T1
26
TI4
19
RX1
T1
TX2 7
TX3 4
T3
28
1
TX1 6
TI1
TX2 7
TX3 4
TI3
T3
TX4 3
T4
15
RI1 15
R1
19
TX4 3
RI1 15
RX1
R1
RI2 16
RI2 16
16
20 RX2
RI3
R2
RI2
16
21 RX3
R3
RI3 17
17
21
21
22 RX4
TI2
4
28
1
TI1
RI4
RX3
R3
18
RI3
17
RI4
18
22 RX4
R4
RI3 17
RX3
R3
RI4 18
RI4 18
SP331 Loopback (Refer to Table1)
SEL A
0
0
1
1
SEL B
0
1
0
1
SEL C
1
1
1
1
SEL D
1
1
1
1
26
27
28
TI1
TI2
TI3
TX1 6
T1
26
19
20
21
TI4
RX1
RX2
RX3
T2
TX3
T3
27
6
TI2
T2
R1
R2
R3
R4
7
TX3
4
TX4
3
28 TI3
TI3
T3
TX4 3
T4
TX2
4
RI1 15
19
RI2 16
20
RX1
RX2
R1
R2
RI1
RI2
15
16
T1
T3
TX1
6
TX2
7
TX3
4
RI4 18
26 TI1
28 TI3
1
TI4
19 RX1
21 RX3
TX4
T4
RI1 15
R1
R3
TX1 6
T1
19
RX1
RI2 16
RX3
R3
17
RI4
18
REV 1.0.1
22 RX4
R4
R1
TX4
3
RI1
15
RI2
16
RI3 17
21 RX3
RI3
TX2 7
TX3 4
T3
3
RI3 17
21
22 RX4
TX1
T1
26 TI1
TX2 7
28
1
TI1
RI3 17
R3
RI4 18
RI4 18
11/13
SP331
Mechanical Dimensions
WSOIC28
Top View
Side View
Front View
Drawing No: POD-00000106
Revision:
REV 1.0.1
B
12/13
SP331
Ordering Information(1)
Part Number
Operating Temperature Range
SP331CT-L
Lead-Free
Package
Tube
0°C to 70°C
SP331CT-L/TR
Yes(2)
SP331ET-L
-40°C to 85°C
SP331ET-L/TR
Packaging Method
28-pin WSOIC
Reel
Tube
Reel
NOTE:
1. Refer to www.exar.com/SP331 for most up-to-date Ordering Information.
2. Visit www.exar.com for additional information on Environmental Rating.
Revision History
Revision
Date
01/04/05
--
01/26/10
1.0.0
Convert to Exar Format. Add Revision History table. Change revision to 1.0.0. Add Note 1 and
change maximum RS-485 data rate at +85C. Update ABS Max Rating table.
03/19/18
1.0.1
Update to MaxLinear logo. Update format and ordering information table. RS-485 Driver Enable Timing moved on page 3.
Corporate Headquarters:
5966 La Place Court
Suite 100
Carlsbad, CA 92008
Tel.:+1 (760) 692-0711
Fax: +1 (760) 444-8598
www.maxlinear.com
Description
Legacy Sipex Datasheet
High Performance Analog:
1060 Rincon Circle
San Jose, CA 95131
Tel.: +1 (669) 265-6100
Fax: +1 (669) 265-6101
Email: serialtechsupport@exar.com
www.exar.com
The content of this document is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by MaxLinear, Inc.. MaxLinear, Inc. assumes
no responsibility or liability for any errors or inaccuracies that may appear in the informational content contained in this guide. Complying with all applicable copyright laws is the responsibility of the
user. Without limiting the rights under copyright, no part of this document may be reproduced into, stored in, or introduced into a retrieval system, or transmitted in any form or by any means (electronic,
mechanical, photocopying, recording, or otherwise), or for any purpose, without the express written permission of MaxLinear, Inc.
Maxlinear, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support
system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless MaxLinear, Inc. receives, in writing, assurances to its satisfaction that: (a) the
risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of MaxLinear, Inc. is adequately protected under the circumstances.
MaxLinear, Inc. may have patents, patent applications, trademarks, copyrights, or other intellectual property rights covering subject matter in this document. Except as expressly provided in any written
license agreement from MaxLinear, Inc., the furnishing of this document does not give you any license to these patents, trademarks, copyrights, or other intellectual property.
Company and product names may be registered trademarks or trademarks of the respective owners with which they are associated.
© 2010 - 2018 MaxLinear, Inc. All rights reserved
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REV 1.0.1
13/13
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