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PDF SP332 Data sheet ( Hoja de datos )

Número de pieza SP332
Descripción RS-232/RS-485 Multi-mode SerialTransceiver
Fabricantes EXAR 
Logotipo EXAR Logotipo



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No Preview Available ! SP332 Hoja de datos, Descripción, Manual

SP332
RS-232/RS-485 Multi-mode SerialTransceiver
• +5V Only Single Supply Operation
• Software Programmable RS-232 or RS-485
Selection
• 4 Drivers, 4 Receivers RS-232
• 2 Drivers, 2 Receivers RS-485
• Loop back function for Self Test
• 28-pin WSOIC package
TI4
SEL_B
TX4
TX3
VCC
TX1
TX2
GND
C1+
V+
C2+
C1–
C2–
V–
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 TI3
27 TI2
26 TI1
25 SD
24 SEL_A
23 LB
22 RX4
21 RX3
20 RX2
19 RX1
18 RI4
17 RI3
16 RI2
15 RI1
DESCRIPTION
The SP332 is a monolithic device that contains both RS-232 and RS-485 line drivers and
receivers. The configuration of the SP332 can be changed at any time by changing the logic
state of two control pins. The device also includes a loop back function which internally con-
nects driver outputs to receiver inputs for a chip self test. An Exar-patended charge pump
allows +5V-only operation.
TYPICAL APPLICATIONS CIRCUIT
0.1µF
0.1µF
0V
0V
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
RS-232 Mode
+5V
9 C1+
5
VCC
SP33212 C1-
11 C2+
V+ 10
V- 14
13 C2-
24 SEL A
2 SEL B
0.1µF
LOOPBACK 23
Vcc
400KΩ
26 TI1
T1
Vcc
TX1 6
400KΩ
27 TI2
T2
Vcc
TX2 7
400KΩ
28 TI3
T3
Vcc
400KΩ
1 TI4
T4
TX3 4
TX4 3
0.1µF
TTL/CMOS
RS-232
RS-232
RS-232
RS-232
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
19 RX1
20 RX2
21 RX3
22 RX4
8 GND
R1 RI1 15
5KΩ
R2 RI2 16
5KΩ
R3 RI3 17
5KΩ
R4 RI4 18
5KΩ
25
SHUTDOWN
RS-232
RS-232
RS-232
RS-232
TTL/CMOS
0.1µF
0.1µF
+5V
+5V
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
Full Duplex RS-485 Mode
+5V
5
9 C1+
12 C1-
11 C2+
VCC
SP332 V+ 10
V- 14
0.1µF
13
24
2
C2-
SEL A
SEL B
Vcc
400KΩ
26 TI1
27 TI2 Vcc
400KΩ
28 TI3
1 TI4
19 RX1
20 RX2
0.1µF
LOOPBACK 23
TTL/CMOS
TX2 7
T1
TX1 6
TX4 3
T3 TX3 4
RI2 16
R1 15KΩ
RI1 15
15KΩ
RS-485
RS-485
RS-485
RS-485
RS-485
RS-485
21 RX3
R3
RI4 18
15KΩ
RI3 17
RS-485
RS-485
22 RX4
15KΩ
8 GND
SHUTDOWN 25
TTL/CMOS
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP332_100_012610

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SP332 pdf
A
VOD
B
R
R VOC
Figure 1. RS-485 Driver DC Test Load Circuit
Test Circuits
Receiver
Output
Test Point
1KΩ
S1 VCC
CRL 1KΩ
S2
Figure 2. Receiver Timing Test Load Circuit
CL1
DI A RDIFF
B
CL2
A
RO
B
15pF
Output
Under
Test CL
500Ω
S1 VCC
S2
Figure 3. RS-485 Driver/Receiver Timing Test Circuit
Figure 4. RS-485 Driver Timing Test Load #2 Circuit
SWITCHING WAVEFORMS
+3V
DRIVER INPUT
0V
DRIVER
OUTPUT
B
A
DIFFERENTIAL VO+
OUTPUT 0V
VA –VB VO
t SKEW = |t DPLH - tDPHL|
f ≥1MHz; tR ≤10ns; tF ≤10ns
1.5V
tPLH
tPHL
VO 1/2VO
tDPLH
tDPHL
tR
1.5V
1/2VO
tF
Figure 5. RS-485 Driver Propagation Delays
VOD2+
A– B
VOD2
VOH
RECEIVER OUT
VOL
tPHL
f = 1MHz; tR ≤10ns ; tF ≤ 10ns
0V INPUT
1.5V
OUTPUT
tPLH
0V
1.5V
Figure 6. RS-485 Receiver Propagation Delays
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP332_100_012610

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SP332 arduino
ORDERING INFORMATION
Model
Temperature Range
Package Types
SP332CT-L.......................................................................... 0°C to +70°C.............................................................................................28-pin WSOIC
SP332CT-L/TR.................................................................... 0°C to +70°C.............................................................................................28-pin WSOIC
SP332ET-L....................................................................... -40°C to +85°C.............................................................................................28-pin WSOIC
SP332ET-L/TR................................................................. -40°C to +85°C.............................................................................................28-pin WSOIC
Note: /TR = Tape and Reel
revision history
DATE
9617RO
01/26/10
REVISION DESCRIPTION
- Legacy Sipex Datasheet
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.
Notice
EXAR Corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reliabil-
ity. EXAR Corporation assumes no representation that the circuits are free of patent infringement. Charts and schedules contained herein are only for
illustration purposes and may vary depending upon a user's specific application. While the information in this publication has been carefully checked;
no responsibility, however, is assumed for inaccuracies.
EXAR Corporation 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 EXAR Corporation receives, in writting, 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 EXAR Corporation is adequately protected under the circumstances.
Copyright 2010 EXAR Corporation
Datasheet January 2010
Send your Interface technical inquiry with technical details to: uarttechsupport@exar.com
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
11
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