diff --git a/library/special.dcm b/library/special.dcm
index 9e2348d3..47eb3724 100644
--- a/library/special.dcm
+++ b/library/special.dcm
@@ -200,6 +200,18 @@ D High performance low power mixer FM IF system
 F philips/SA605.pdf
 $ENDCMP
 #
+$CMP Si570
+D 10 MHz to 1.4 GHz I2C Programmable XO
+K I2C Programmable XO
+F http://www.silabs.com/Support Documents/TechnicalDocs/si570.pdf
+$ENDCMP
+#
+$CMP Si571
+D 10 MHz to 1.4 GHz I2C Programmable VCXO
+K I2C Programmable VCXO
+F http://www.silabs.com/Support Documents/TechnicalDocs/si570.pdf
+$ENDCMP
+#
 $CMP SI9986
 D Buffered H Bridge (1 A)
 F siliconix/si9986.pdf
diff --git a/library/special.lib b/library/special.lib
index 3e1ed0cd..3c93b048 100644
--- a/library/special.lib
+++ b/library/special.lib
@@ -3495,6 +3495,54 @@ X SH 19 -300 -1300 300 U 60 60 1 1 I I
 ENDDRAW
 ENDDEF
 #
+# Si570
+#
+DEF Si570 IC 0 40 Y Y 1 F N
+F0 "IC" 350 -200 50 H V C CNN
+F1 "Si570" 0 0 50 H V C CNN
+F2 "SI570_SI571_Standard" -550 400 50 H I C CNN
+F3 "http://www.silabs.com/Support Documents/TechnicalDocs/si570.pdf" -400 500 50 H I C CNN
+$FPLIST
+ SI570_SI571_Standard
+ SI570_SI571_HandSoldering
+$ENDFPLIST
+DRAW
+S -450 250 450 -250 0 1 0 N
+X NC 1 -600 100 150 R 50 50 1 1 N
+X OE 2 -600 0 150 R 50 50 1 1 I
+X GND 3 -600 -100 150 R 50 50 1 1 W
+X CLK+ 4 600 -100 150 L 50 50 1 1 O
+X CLK- 5 600 0 150 L 50 50 1 1 O
+X Vcc 6 600 100 150 L 50 50 1 1 W
+X SDA 7 0 400 150 D 50 50 1 1 B
+X SCL 8 0 -400 150 U 50 50 1 1 B
+ENDDRAW
+ENDDEF
+#
+# Si571
+#
+DEF Si571 IC 0 40 Y Y 1 F N
+F0 "IC" 350 -200 50 H V C CNN
+F1 "Si571" 0 0 50 H V C CNN
+F2 "SI570_SI571_Standard" -550 400 50 H I C CNN
+F3 "http://www.silabs.com/Support Documents/TechnicalDocs/si570.pdf" -400 500 50 H I C CNN
+$FPLIST
+ SI570_SI571_Standard
+ SI570_SI571_HandSoldering
+$ENDFPLIST
+DRAW
+S -450 250 450 -250 0 1 0 N
+X Vc 1 -600 100 150 R 50 50 1 1 I
+X OE 2 -600 0 150 R 50 50 1 1 I
+X GND 3 -600 -100 150 R 50 50 1 1 W
+X CLK+ 4 600 -100 150 L 50 50 1 1 O
+X CLK- 5 600 0 150 L 50 50 1 1 O
+X Vcc 6 600 100 150 L 50 50 1 1 W
+X SDA 7 0 400 150 D 50 50 1 1 B
+X SCL 8 0 -400 150 U 50 50 1 1 B
+ENDDRAW
+ENDDEF
+#
 # TC524256Z
 #
 DEF TC524256Z U 0 40 Y Y 1 F N