Serial Transceivers

Exar’s serial transceivers find use in industrial systems, building networks, factory and process automation, POS (Point Of Sale) equipment, and many other growing applications. Our extensive transceiver portfolio includes RS-232, RS-485, RS-422, and multi protocol transceivers and spans a range of data rates and advanced features

Most of Exar’s RS232 transceivers are pin and spec compatible with popular industry standard devices for direct drop-in replacement or a reliable second source for high volume production. Our enhanced ESD (ElectroStatic Discharge) devices are suitable for rugged applications in harsh operating conditions; up to ±15kV IEC 61000-4-2, and/or ±15kV HBM (Human Body Model).

Our broad RS 485/422 portfolio ranges from industry standard slew limited transceivers to ultra high speed (52Mbps), as well as high differential output drive transceivers for specialty applications or harsh industrial environments. In addition, Exar has RS485 transceivers that are compliant to popular field bus standards, including PROFIBUS. Advanced features like hot swap/hot plug, enhanced receiver failsafe, and 15kV ESD (ElectroStatic Discharge) protection ensure reliable and robust data communication over long cable lengths.

Exar is a recognized technology leader in multiprotocol serial transceivers. Our SP508, SP509, and SP510 devices support more serial protocols than any other single chip on the market, including RS-232, RS-449, EIA-530, EIA-530A, V.10, V.11, V.28, V.35, V.36, and X.21. Our newest dual protocol parts feature internally switched RS 485/422 cable termination, which greatly simplifies the use of multiple serial protocol standards over a single connector. These products enable our customers to reduce their component and connector count, lower their BOM (Bill Of Materials) costs, and customize their end products on the fly or in the field.

 

Transceiver
 
Multiprotocol
RS232
RS422
RS485

Multiprotocol
Multiprotocol

4
4
10000
5
2
RS232, V.28, RS485, RS422, V.24
4
4
10000
5
2
RS232, V.28, RS485, RS422, V.24
3
5
10000
5
2
RS232, V.28, RS485, RS422, V.24
4
4
250/100/10000
3.3 or 5
2
15
n/a
RS-232, V.28, RS-485, RS-422, V.24
3/2
5/2
250k, 1M/10M
3.3 to 5
1.5/7.0
15
RS-232, V.28, RS-485, RS-422, V.24
3/2
5/4
256/1M/20M
3.3 or 5
2
15
Complete
RS-232, V.28, RS-485, RS-422, V.24
3/1
5/1
256/1M/20M
3.3 or 5
2
15
Complete
RS-232, V.28, RS-485, RS-422, V.24
8
8
20000
3.3
4
Complete
RS232, RS449,EIA530, EIA530A,V.10, V.11, V.28, V.35, V.36,X.21
7
7
5000
5
2
N/A
RS232, RS449,EIA530, V.10, V.11, V.28, X.21, RS485
7
7
10000
5
0.5
Basic
RS232, RS449,EIA530, V.10, V.11, V.28, X.21, RS485, V.35
7
7
10000
5
2
V.35, V.11
RS232, RS449,EIA530, ,V.10, V.11, V.28, V.35, V.36,X.21
7
7
16000
5
2
V.35, V.11
RS232, RS449,EIA530, ,V.10, V.11, V.28, V.35, V.36,X.21
7
7
20000
5
2
V.35, V.11
RS232, RS449,EIA530, ,V.10, V.11, V.28, V.35, V.36,X.21
7
7
20000
5
2
V.35, V.11
RS232, RS449,EIA530, EIA530A,V.10, V.11, V.28, V.35, V.36,X.21
8
8
20000
5
15
Complete
RS232, RS449,EIA530, EIA530A,V.10, V.11, V.28, V.35, V.36,X.21
8
8
52000
5
15
Complete
RS232, RS449,EIA530, EIA530A,V.10, V.11, V.28, V.35, V.36, X.21
8
8
52000
5
15
Complete
RS232, RS449,EIA530, EIA530A,V.10, V.11, V.28, V.35, V.36, X.21
7
7
10000
5
2
Basic
RS232, RS449,EIA530, EIA530A,V.10, V.11, V.28, V.35, V.36,X.21
4
4
10000
5
15
N/A
RS232, RS449,EIA530, EIA530A,V.10, V.11, V.28, V.36, X.21
RS232
RS232

2
2
120
15
4.5
5.5
5
▪
4
0.1
▪
4
3
120
2
4.5
5.5
5
▪
4
0.1
▪
▪
5
3
120
2
4.5
5.5
5
▪
4
0.1
5
3
120
15
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5.5
5
▪
4
0.1
4
4
120
10
4.5
5.5
5
▪
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0.1
4
4
120
15
4.5
5.5
5
▪
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0.1
4
5
120
2
4.5
5.5
5
▪
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0.1
▪
▪
4
5
120
15
4.5
5.5
5
▪
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0.1
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▪
4
5
460
15
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5.5
5
▪
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0.1
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4
5
120
15
4.5
5.5
5
▪
4
0.1
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▪
4
5
460
15
4.5
5.5
5
▪
4
0.1
▪
▪
6
10
460
15
10.8
13.2
12
▪
2
0.1
2
2
120
2
4.5
5.5
5
▪
4
0.1
2
2
120
15
4.5
5.5
5
▪
4
0.1
2
2
120
2
4.5
5.5
5
▪
0
2
2
120
15
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5.5
5
▪
0
5
5
20
2
4.5
5.5
5
▪
0
▪
▪
4
4
20
2
4.5
5.5
5
▪
4
1
2
2
120
2
4.5
5.5
5
▪
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0.1
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2
2
120
15
4.5
5.5
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▪
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0.1
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2
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120
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4.5
5.5
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▪
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0.1
▪
▪
2
2
120
15
4.5
5.5
5
▪
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0.1
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▪
3
2
250
15
3
5.5
3.3
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0.1
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1
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120
15
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5.5
3.3
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1
250
15
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5.5
3.3
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1
1
1000
15
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5.5
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1
250
15
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5.5
▪
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2
120
15
3
5.5
3.3
▪
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0.1
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2
2
250
15
3
5.5
3.3
▪
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0.1
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▪
2
2
1000
15
3
5.5
3.3
▪
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0.1
▪
▪
2
2
120
15
3
5.5
3.3
▪
4
0.1
▪
▪
2
2
250
15
3
5.5
3.3
▪
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0.1
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▪
2
2
1000
15
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5.5
3.3
▪
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0.1
▪
▪
2
2
250
15
3
5.5
3.3
▪
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0.1
▪
▪
2
2
250
15
3
5.5
3.3
▪
4
0.1
▪
▪
1
1
250
15
3
5.5
3.3
▪
4
0.1
▪
▪
1
1
1M
15
3
5.5
3.3
▪
4
0.1
▪
▪
2
2
120
15
3
5.5
3.3
▪
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0.1
2
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250
15
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5.5
3.3
▪
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0.1
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2
460
15
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5.5
3.3
▪
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0.1
2
2
1000
15
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5.5
3.3
▪
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0.1
5
3
250
15
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5.5
3.3
▪
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0.1
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▪
5
3
250
15
3
5.5
3.3
▪
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0.1
▪
▪
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5
120
15
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5.5
3.3
▪
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0.1
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▪
3
5
250
15
3
5.5
3.3
▪
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0.1
▪
▪
3
5
460
15
3
5.5
3.3
▪
4
0.1
▪
▪
3
5
1000
15
3
5.5
3.3
▪
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0.1
▪
▪
3
5
250
15
3
5.5
3.3
▪
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0.1
▪
▪
3
5
1000
15
3
5.5
3.3
▪
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0.1
▪
▪
5
3
250
15
3
5.5
3.3
▪
4
0.1
▪
2
2
120
15
3
5
3.6
▪
4
0.1
▪
RS422
RS422

5
1
1
Half
20Mbps
15
1nA
▪
▪
▪
up to 256
5
1
1
Full
20Mbps
15
1nA
▪
▪
▪
up to 256
5
1
1
Full
20Mbps
15
1nA
▪
▪
▪
up to 256
5
1
1
Half
1Mbps
15
1nA
▪
▪
▪
up to 256
5
1
1
Full
1Mbps
15
1nA
▪
▪
▪
up to 256
5
1
1
Full
1Mbps
15
1nA
▪
▪
▪
up to 256
5
1
1
Half
250
15
1nA
▪
▪
▪
up to 256
5
1
1
Full
250
15
1nA
▪
▪
▪
up to 256
5
1
1
Full
250
15
1nA
▪
▪
▪
up to 256
5
1
1
Half
20000
15
10
▪
▪
▪
32
5
1
1
Half
20000
15
▪
▪
32
5
1
1
Half
20000
15
1
▪
▪
256
5
1
1
Full
20000
15
▪
32
5
1
1
Full
20000
15
10
▪
▪
32
3.3
4
0
Full
60000
2
2
10
3.3
0
4
Full
50000
2
5000
▪
10
3.3
1
1
Full
250
15
0.05
▪
▪
▪
256
3.3
1
1
Full
250
15
0.05
▪
▪
256
3.3
1
1
Half
250
15
0.5
▪
▪
▪
256
3.3
1
1
Full
500
15
0.5
▪
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▪
256
3.3
1
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Full
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0.05
▪
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256
3.3
1
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Half
500
15
0.5
▪
▪
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256
3.3
1
1
Full
16000
15
0.5
▪
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▪
256
3.3
1
1
Full
16000
15
0.05
▪
▪
256
3.3
1
1
Half
16000
15
0.5
▪
▪
▪
256
5
1
1
Full
115
15
1
▪
▪
▪
256
5
1
1
Full
115
15
▪
▪
256
5
1
1
Half
115
15
1
▪
▪
▪
256
5
1
1
Full
500
15
1
▪
▪
▪
256
5
1
1
Full
500
15
▪
▪
256
5
1
1
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500
15
1
▪
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256
5
1
1
Full
20000
15
1
▪
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▪
256
5
1
1
Full
20000
15
▪
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256
5
1
1
Half
20000
15
1
▪
▪
▪
256
3.3
1
1
Half
250
2
1
▪
▪
32
3.3
1
1
Half
10000
2
10
▪
32
3.3
1
1
Full
10000
2
▪
32
3.3
1
1
Full
10000
2
10
▪
▪
32
3.3
1
1
Half
2500
2
10
▪
▪
32
3.3
1
1
Half
32000
15
1
▪
64
3.3
1
1
Full
32000
15
1
▪
▪
64
3.3
1
1
Full
32000
15
1
▪
▪
▪
64
5V
1
1
Half
115kbps
15KV
400
▪
256
5
1
1
Half
10000
15
1
▪
▪
32
5
1
1
Half
250
2
1
▪
▪
32
5
1
1
Half
250
15
1
▪
▪
32
5
1
1
Half
5000
2
▪
32
5
1
1
Half
10000
15
▪
32
5
1
1
Half
1000
2
0.5
▪
400
5
4
0
Quad
10000
2
32
5
4
0
Quad
10000
2
32
5
1
1
Full
5000
2
▪
32
5
1
1
Full
10000
15
▪
32
5
1
1
Full
5000
2
▪
▪
32
5
1
1
Full
10000
15
▪
▪
32
5
1
1
Full
52000
15
1
▪
256
5
1
1
Full
52000
15
1
▪
256
5
1
1
Half
52000
15
1
▪
256
* recently added
RS485
RS485

5
1
1
Half
20Mbps
15
1nA
▪
▪
▪
up to 256
5
1
1
Full
20Mbps
15
1nA
▪
▪
▪
up to 256
5
1
1
Full
20Mbps
15
1nA
▪
▪
▪
up to 256
5
1
1
Half
1Mbps
15
1nA
▪
▪
▪
up to 256
5
1
1
Full
1Mbps
15
1nA
▪
▪
▪
up to 256
5
1
1
Full
1Mbps
15
1nA
▪
▪
▪
up to 256
5
1
1
Half
250
15
1nA
▪
▪
▪
up to 256
5
1
1
Full
250
15
1nA
▪
▪
▪
up to 256
5
1
1
Full
250
15
1nA
▪
▪
▪
up to 256
5
1
1
Half
20000
15
10
▪
▪
▪
32
5
1
1
Half
20000
15
▪
32
5
1
1
Half
20000
15
1
▪
▪
256
5
1
1
Full
20000
15
▪
32
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1
1
Full
20000
15
10
▪
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32
3.3
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1
Full
250
15
0.05
▪
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256
3.3
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250
15
0.05
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256
3.3
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250
15
0.5
▪
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256
3.3
1
1
Full
500
15
0.5
▪
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256
3.3
1
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Full
500
15
0.05
▪
▪
256
3.3
1
1
Half
500
15
0.5
▪
▪
▪
256
3.3
1
1
Full
16000
15
0.5
▪
▪
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256
3.3
1
1
Full
16000
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0.05
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256
3.3
1
1
Half
16000
15
0.5
▪
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256
5
1
1
Full
115
15
1
▪
▪
▪
256
5
1
1
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115
15
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256
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1
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115
15
1
▪
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256
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1
1
Full
500
15
1
▪
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15
1
▪
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256
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1
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20000
15
1
▪
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256
5
1
1
Full
20000
15
▪
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256
5
1
1
Half
20000
15
1
▪
▪
▪
256
3.3
1
1
Half
250
2
1
▪
▪
32
3.3
1
1
Half
10000
2
10
▪
32
3.3
1
1
Full
10000
2
▪
32
3.3
1
1
Full
10000
2
10
▪
▪
32
3.3
1
1
Half
2500
2
10
▪
▪
32
3.3
1
1
Half
32000
15
1
▪
64
3.3
1
1
Full
32000
15
1
▪
64
3.3
1
1
Full
32000
15
1
▪
64
5V
1
1
Half
115kbps
15KV
400
▪
256
5
1
1
Half
10000
15
1
▪
▪
32
5
1
1
Half
250
2
1
▪
▪
32
5
1
1
Half
250
15
1
▪
▪
32
5
1
1
Half
5000
2
▪
32
5
1
1
Half
10000
15
▪
32
5
1
1
Half
1000
2
0.5
▪
400
5
4
0
Quad
10000
2
32
5
4
0
Quad
10000
2
32
5
1
1
Full
5000
2
▪
32
5
1
1
Full
10000
15
▪
32
5
1
1
Full
5000
2
▪
▪
32
5
1
1
Full
10000
15
▪
▪
32
5
1
1
Full
52000
15
1
▪
256
5
1
1
Full
52000
15
1
▪
256
5
1
1
Half
52000
15
1
▪
256
* recently added
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