diff --git a/library/interface.dcm b/library/interface.dcm
index 549a7bbf..8dd3c35c 100644
--- a/library/interface.dcm
+++ b/library/interface.dcm
@@ -36,12 +36,6 @@ K Direct Digital Synthesizer DDS
 F http://www.analog.com/static/imported-files/data_sheets/AD9951.pdf
 $ENDCMP
 #
-$CMP ADUM1200AR
-D ADuM1200AR, Dual-Channel Digital Isolator, 1Mbps 150ns, SO8
-K 2Ch Dual Digital Isolator 1Mbps
-F http://www.analog.com/static/imported-files/data_sheets/ADuM1200_1201.pdf
-$ENDCMP
-#
 $CMP ADuM1200BR
 D ADuM1200BR, Dual-Channel Digital Isolator, 10Mbps 50ns, SO8
 K 2Ch Dual Digital Isolator 10Mbps
@@ -72,12 +66,6 @@ K 2Ch Dual Digital Isolator 25Mbps
 F http://www.analog.com/static/imported-files/data_sheets/ADuM1200_1201.pdf
 $ENDCMP
 #
-$CMP ADUM1201AR
-D ADuM1201AR, Dual-Channel Digital Isolator, 1Mbps 150ns, SO8
-K 2Ch Dual Digital Isolator 1Mbps
-F http://www.analog.com/static/imported-files/data_sheets/ADuM1200_1201.pdf
-$ENDCMP
-#
 $CMP ADuM1201BR
 D ADuM1201BR, Dual-Channel Digital Isolator, 10Mbps 50ns, SO8
 K 2Ch Dual Digital Isolator 10Mbps
@@ -166,6 +154,12 @@ K RS232 UART Driver Receiver Interface
 F http://www.ti.com/lit/ds/symlink/gd75232.pdf
 $ENDCMP
 #
+$CMP ISL83491
+D 10Mbps RS485/RS422 transceiver, full duplex, receiver/driver enable, low power shutdown
+K RS485 RS422 transceiver full duplex
+F http://www.intersil.com/content/dam/Intersil/documents/isl8/isl83483-85-88-90-91.pdf
+$ENDCMP
+#
 $CMP LTC2861
 D 20Mbps RS485 transceiver with tntegrated switchable termination
 K RS485
diff --git a/library/interface.lib b/library/interface.lib
index 9951aab8..ef7997a4 100644
--- a/library/interface.lib
+++ b/library/interface.lib
@@ -552,6 +552,46 @@ X RY1 19 -600 -300 150 R 50 50 1 1 O
 ENDDRAW
 ENDDEF
 #
+# ISL83491
+#
+DEF ISL83491 U 0 40 Y Y 1 F N
+F0 "U" -200 -650 50 H V L CNN
+F1 "ISL83491" 0 650 50 H V L CNN
+F2 "" 0 0 50 H I C CIN
+F3 "" 0 0 60 H V C CNN
+$FPLIST
+ SOIC*
+ PDIP*
+$ENDFPLIST
+DRAW
+T 0 -50 -200 50 0 0 0 D  Normal 1 C C
+T 0 50 300 50 0 0 0 R  Normal 1 C C
+S -350 600 350 -600 0 1 10 f
+P 2 0 1 0  -200 -200  -150 -200 N
+P 2 0 1 0  -150 300  -200 300 N
+P 3 0 1 0  250 200  150 200  150 200 N
+P 3 0 1 0  250 400  150 400  150 400 N
+P 4 0 1 0  -150 -400  -50 -400  -50 -300  -50 -300 N
+P 4 0 1 0  -50 250  -50 100  -100 100  -200 100 N
+P 4 0 1 0  250 -300  50 -300  50 -250  50 -250 N
+P 4 0 1 0  250 -100  50 -100  50 -150  50 -150 N
+P 5 0 1 10  -150 -50  -150 -350  150 -200  -150 -50  -150 -50 N
+P 5 0 1 10  150 450  150 150  -150 300  150 450  150 450 N
+X RO 2 -500 300 150 R 50 50 1 1 O
+X ~RE 3 -500 100 150 R 50 50 1 1 I
+X DE 4 -500 -400 150 R 50 50 1 1 I
+X DI 5 -500 -200 150 R 50 50 1 1 I
+X GND 6 100 -700 100 U 50 50 1 1 W
+X GND 7 200 -700 100 U 50 50 1 1 W
+X Y 9 500 -100 150 L 50 50 1 1 O
+X ~Z~ 10 500 -300 150 L 50 50 1 1 O
+X ~B 11 500 200 150 L 50 50 1 1 I
+X A 12 500 400 150 L 50 50 1 1 I
+X VCC 13 -200 700 100 D 50 50 1 1 W
+X VCC 14 -100 700 100 D 50 50 1 1 W
+ENDDRAW
+ENDDEF
+#
 # LTC2861
 #
 DEF LTC2861 U 0 40 Y Y 1 F N