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POS Register - RS-232 InterfaceClick to sort descending/ascending.
Device
Data-
Sheet
Device Description
Supported Protocols
# of Ports
# of Tx/Rx per Port
High ESD (kV)
Data Rate RS-485/RS-232 (Mbps)
RS-485 Rx Failsafe Type
VLOGIC Supply Pin?
RXEN Polarity
Loopback Feature?
Operating ICC RS-485/RS-232 (mA)
SHDN ICC (µA)
VCC (V)
100-999 Unit MSRP
($)		Package
 ISL3330 3.3V, ±15kV ESD Protected, Dual Protocol (RS-232/RS-485) TransceiversRS-232, RS-422, RS-48511/1 RS-485, RS-422; 2/2 RS-2321520, 0.46/0.4FullNoHighYes1.3/3.7303.32.9320 Ld SSOP
20 Ld SSOP T+R 
 ISL3331 3.3V, ±15kV ESD Protected, Dual Protocol (RS-232/RS-485) TransceiversRS-232, RS-422, RS-48511/1 RS-485, RS-422; 2/2 RS-2321520, 0.46, 0.115/0.4FullYesBothYes1.3/3.7303.33.6040 Ld QFN
40 Ld QFN T+R
Eval Board 
 ISL3332 3.3V, ±15kV ESD Protected, Two Port, Dual Protocol (RS-232/RS-485) TransceiversRS-232, RS-422, RS-48521/1 RS-485, RS-422; 2/2 RS-2321520/0.4FullNoNoneYes1.6/3.7453.34.2728 Ld SSOP
28 Ld SSOP T+R 
 ISL3333 3.3V, ±15kV ESD Protected, Two Port, Dual Protocol (RS-232/RS-485) TransceiversRS-232, RS-422, RS-48521/1 RS-485, RS-422; 2/2 RS-2321520, 0.46, 0.115/0.4FullYesLowYes1.6/3.7603.34.2740 Ld QFN
40 Ld QFN T+R
Eval Board 
 ISL41334 ±15kV ESD Protected, 5V, Two Port, Dual Protocol (RS-232/RS-485) TransceiversRS-232, RS-422, RS-48521/1 RS-485, RS-422; 2/2 RS-2321520, 0.46, 0.115/0.5FullYesLowYes1.6/3.78053.6040 Ld QFN
40 Ld QFN T+R
Eval Board 
 ISL41387 ±15kV ESD Protected, 5V, Dual Protocol (RS-232/RS-485) TransceiversRS-232, RS-422, RS-48511/1 RS-485, RS-422; 2/2 RS-2321520, 0.46, 0.115/0.5FullYesHigh and LowYes1.6/3.73552.9340 Ld QFN
40 Ld QFN T+R
Eval Board 
 ISL81334 ±15kV ESD Protected, 5V, Two Port, Dual Protocol (RS-232/RS-485) TransceiversRS-232, RS-422, RS-48521/1 RS-485, RS-422; 2/2 RS-2321520/0.5FullNoNoneYes1.6/3.74253.6028 Ld SOIC
28 Ld SOIC T+R
28 Ld SSOP
28 Ld SSOP T+R 
 ISL81387 ±15kV ESD Protected, 5V, Dual Protocol (RS-232/RS-485) TransceiversRS-232, RS-422, RS-48511/1 RS-485, RS-422; 2/2 RS-2321520, 0.46/0.5FullNoHighYes1.6/3.73552.9320 Ld SOIC
20 Ld SOIC T+R
20 Ld SSOP
20 Ld SSOP T+R 

Device
Data-
Sheet
Device Description
# of Tx
# of Rx
High ESD
Manual Shutdown
Auto Shutdown
Rx Disable
Data Rate (Mbps)
Cap. Value (µF)
IS Enabled (mA)
IS Disabled (µA)
VCC Range (V)
VCC (min) (V)
VCC (max) (V)
100-999 Unit MSRP
($)		Package
 ICL3224 1μA, +3V to +5.5V, 250kbps, RS-232 Transceivers with Enhanced Automatic Powerdown22NoYesEnhancedNo0.50.10.313 to 5.535.51.6320 Ld PDIP
20 Ld SSOP
20 Ld SSOP T+R 
 ICL3237 1μA Supply-Current, +3V to +5.5V, 250kbps or 1000kbps, RS-232 Transmitters/Receivers53NoYesNoYes0.5/1.00.10.313 to 5.535.51.9928 Ld SSOP
28 Ld SSOP T+R 
 ICL3237E ±15KV ESD Protected, 1μA Supply-Current, +3V to +5.5V, 250kbps or 1000kbps, RS-232 Transmitters/Receivers53YesYesNoYes0.5/1.00.10.30.013 to 5.535.52.6428 Ld SSOP
28 Ld SSOP T+R 
 ICL3238 1μA, +3V To +5.5V, 250kbps, RS-232 Transceivers With Enhanced Automatic Powerdown53NoYesEnhancedNo0.50.10.313 to 5.535.51.0028 Ld SOIC
28 Ld SOIC T+R
28 Ld SSOP
28 Ld SSOP T+R
28 Ld TSSOP
28 Ld TSSOP T+R 
 ICL3238E ±15kV ESD Protected, +3V to +5.5V, 1μA, 250kbps, RS-232 Transceivers With Enhanced Automatic Powerdown53YesYesEnhancedNo0.50.10.30.013 to 5.535.51.7228 Ld SSOP
28 Ld SSOP T+R
28 Ld TSSOP
28 Ld TSSOP T+R 
 ISL3241E QFN Packaged, ±15kV ESD Protected, +2.7V to +3.6V, 250kbps, RS-232 Transmitters/Receivers with Separate Logic Supply Pin35YesYesNoYes0.250.10.312.7 to 3.62.73.61.6732 Ld QFN 
 ISL3243E QFN Packaged, ±15kV ESD Protected, +2.7V to +3.6V, 250kbps, RS-232 Transmitters/Receivers with Separate Logic Supply Pin35YesYesBasicNo0.250.10.312.7 to 3.62.73.61.6732 Ld QFN 
*Data listed above is for reference only, please refer to Product Data Sheets for current specifications.