diff --git a/library/interface.dcm b/library/interface.dcm
index 597ac4f1..ce005841 100644
--- a/library/interface.dcm
+++ b/library/interface.dcm
@@ -272,6 +272,12 @@ K Cold Junction Termocouple Interface SPI
 F http://datasheets.maximintegrated.com/en/ds/MAX31855.pdf
 $ENDCMP
 #
+$CMP MAX3221
+D RS232 transceiver with 15kV ESD protection
+K serial UART 232 
+F http://www.ti.com/lit/ds/symlink/max3221.pdf
+$ENDCMP
+#
 $CMP MAX3226
 D Low power high speed RS232 transceiver with autoshutdown plus
 K serial UART 232 
diff --git a/library/interface.lib b/library/interface.lib
index 793c2165..8f7a1cdb 100644
--- a/library/interface.lib
+++ b/library/interface.lib
@@ -1537,6 +1537,46 @@ X SO 7 500 100 150 L 50 50 1 1 O
 ENDDRAW
 ENDDEF
 #
+# MAX3221
+#
+DEF MAX3221 U 0 40 Y Y 1 F N
+F0 "U" -400 850 50 H V L CNN
+F1 "MAX3221" 500 850 50 H V R CNN
+F2 "" 50 0 50 H V C CIN
+F3 "http://www.ti.com/lit/ds/symlink/max3221.pdf" 0 950 50 H I C CNN
+$FPLIST
+ SSOP*
+ TSSOP*
+$ENDFPLIST
+DRAW
+C 120 -500 20 0 1 0 N
+C 120 -400 20 0 1 0 N
+S -400 -800 500 800 0 1 10 f
+P 3 0 1 0  -100 -500  0 -500  0 -500 N
+P 3 0 1 0  -100 -400  0 -400  0 -400 N
+P 3 0 1 0  140 -500  190 -500  190 -500 N
+P 3 0 1 0  140 -400  200 -400  200 -400 N
+P 5 0 1 0  100 -450  100 -550  0 -500  100 -450  100 -450 N
+P 6 0 1 0  0 -450  0 -350  100 -400  0 -450  0 -450  0 -450 N
+X ~EN 1 -600 -600 200 R 50 50 1 1 I
+X C1+ 2 -600 700 200 R 50 50 1 1 P
+X V+ 3 700 300 200 L 50 50 1 1 P
+X C1- 4 -600 300 200 R 50 50 1 1 P
+X C2+ 5 -600 200 200 R 50 50 1 1 P
+X C2- 6 -600 -200 200 R 50 50 1 1 P
+X V- 7 700 -200 200 L 50 50 1 1 P
+X RIN 8 700 -500 200 L 50 50 1 1 I
+X ROUT 9 -600 -500 200 R 50 50 1 1 O
+X ~INVALID 10 700 -600 200 L 50 50 1 1 O V
+X DIN 11 -600 -400 200 R 50 50 1 1 I
+X FORCEON 12 -600 -700 200 R 50 50 1 1 I
+X DOUT 13 700 -400 200 L 50 50 1 1 O
+X GND 14 700 100 200 L 50 50 1 1 W
+X VCC 15 700 700 200 L 50 50 1 1 W
+X ~FORCEOFF 16 700 -700 200 L 50 50 1 1 I L
+ENDDRAW
+ENDDEF
+#
 # MAX3226
 #
 DEF MAX3226 U 0 40 Y Y 1 F N