diff --git a/schematics/shimatta_interface.kicad_sym b/schematics/shimatta_interface.kicad_sym
index 3eba8f8..c3b21b6 100644
--- a/schematics/shimatta_interface.kicad_sym
+++ b/schematics/shimatta_interface.kicad_sym
@@ -346,6 +346,176 @@
       )
     )
   )
+  (symbol "ISL83488" (pin_names (offset 1.016)) (in_bom yes) (on_board yes)
+    (property "Reference" "U" (id 0) (at -7.62 -15.24 0)
+      (effects (font (size 1.27 1.27)) (justify left))
+    )
+    (property "Value" "ISL83488" (id 1) (at 0 15.24 0)
+      (effects (font (size 1.27 1.27)) (justify left))
+    )
+    (property "Footprint" "" (id 2) (at 0 0 0)
+      (effects (font (size 1.27 1.27) italic) hide)
+    )
+    (property "Datasheet" "https://www.mouser.de/datasheet/2/698/REN_isl83483_85_88_90_91_DST_20030328-1998551.pdf" (id 3) (at 0 0 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "ki_keywords" "RS485 RS422 transceiver full duplex" (id 4) (at 0 0 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "ki_description" "RS485/RS422 transceiver, full duplex" (id 5) (at 0 0 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "ki_fp_filters" "SOIC* DIP*W7.62mm*" (id 6) (at 0 0 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (symbol "ISL83488_0_0"
+      (text "D" (at -1.27 -5.08 0)
+        (effects (font (size 1.27 1.27) bold))
+      )
+      (text "R" (at 1.27 7.62 0)
+        (effects (font (size 1.27 1.27) bold))
+      )
+    )
+    (symbol "ISL83488_0_1"
+      (rectangle (start -8.89 13.97) (end 8.89 -13.97)
+        (stroke (width 0.254) (type default) (color 0 0 0 0))
+        (fill (type background))
+      )
+      (polyline
+        (pts
+          (xy -5.08 -5.08)
+          (xy -3.81 -5.08)
+        )
+        (stroke (width 0) (type default) (color 0 0 0 0))
+        (fill (type none))
+      )
+      (polyline
+        (pts
+          (xy -3.81 7.62)
+          (xy -5.08 7.62)
+        )
+        (stroke (width 0) (type default) (color 0 0 0 0))
+        (fill (type none))
+      )
+      (polyline
+        (pts
+          (xy 6.35 5.08)
+          (xy 3.81 5.08)
+          (xy 3.81 5.08)
+        )
+        (stroke (width 0) (type default) (color 0 0 0 0))
+        (fill (type none))
+      )
+      (polyline
+        (pts
+          (xy 6.35 10.16)
+          (xy 3.81 10.16)
+          (xy 3.81 10.16)
+        )
+        (stroke (width 0) (type default) (color 0 0 0 0))
+        (fill (type none))
+      )
+      (polyline
+        (pts
+          (xy 6.35 -7.62)
+          (xy 1.27 -7.62)
+          (xy 1.27 -6.35)
+          (xy 1.27 -6.35)
+        )
+        (stroke (width 0) (type default) (color 0 0 0 0))
+        (fill (type none))
+      )
+      (polyline
+        (pts
+          (xy 6.35 -2.54)
+          (xy 1.27 -2.54)
+          (xy 1.27 -3.81)
+          (xy 1.27 -3.81)
+        )
+        (stroke (width 0) (type default) (color 0 0 0 0))
+        (fill (type none))
+      )
+      (polyline
+        (pts
+          (xy -3.81 -1.27)
+          (xy -3.81 -8.89)
+          (xy 3.81 -5.08)
+          (xy -3.81 -1.27)
+          (xy -3.81 -1.27)
+        )
+        (stroke (width 0.254) (type default) (color 0 0 0 0))
+        (fill (type none))
+      )
+      (polyline
+        (pts
+          (xy 3.81 11.43)
+          (xy 3.81 3.81)
+          (xy -3.81 7.62)
+          (xy 3.81 11.43)
+          (xy 3.81 11.43)
+        )
+        (stroke (width 0.254) (type default) (color 0 0 0 0))
+        (fill (type none))
+      )
+    )
+    (symbol "ISL83488_1_1"
+      (pin power_in line (at -5.08 17.78 270) (length 3.81)
+        (name "VCC" (effects (font (size 1.27 1.27))))
+        (number "1" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at -12.7 7.62 0) (length 3.81)
+        (name "RO" (effects (font (size 1.27 1.27))))
+        (number "2" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at -12.7 -5.08 0) (length 3.81)
+        (name "DI" (effects (font (size 1.27 1.27))))
+        (number "3" (effects (font (size 1.27 1.27))))
+      )
+      (pin power_in line (at 0 -17.78 90) (length 3.81)
+        (name "GND" (effects (font (size 1.27 1.27))))
+        (number "4" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at 12.7 -2.54 180) (length 3.81)
+        (name "Y" (effects (font (size 1.27 1.27))))
+        (number "5" (effects (font (size 1.27 1.27))))
+      )
+      (pin output line (at 12.7 -7.62 180) (length 3.81)
+        (name "~{Z}" (effects (font (size 1.27 1.27))))
+        (number "6" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at 12.7 5.08 180) (length 3.81)
+        (name "~{B}" (effects (font (size 1.27 1.27))))
+        (number "7" (effects (font (size 1.27 1.27))))
+      )
+      (pin input line (at 12.7 10.16 180) (length 3.81)
+        (name "A" (effects (font (size 1.27 1.27))))
+        (number "8" (effects (font (size 1.27 1.27))))
+      )
+    )
+  )
+  (symbol "ISL83490" (extends "ISL83488")
+    (property "Reference" "U" (id 0) (at -7.62 -15.24 0)
+      (effects (font (size 1.27 1.27)) (justify left))
+    )
+    (property "Value" "ISL83490" (id 1) (at 0 15.24 0)
+      (effects (font (size 1.27 1.27)) (justify left))
+    )
+    (property "Footprint" "" (id 2) (at 0 0 0)
+      (effects (font (size 1.27 1.27) italic) hide)
+    )
+    (property "Datasheet" "" (id 3) (at 0 0 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "ki_keywords" "RS485 RS422 transceiver full duplex" (id 4) (at 0 0 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "ki_description" "RS485/RS422 transceiver, full duplex, 10Mbps" (id 5) (at 0 0 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "ki_fp_filters" "SOIC* DIP*W7.62mm*" (id 6) (at 0 0 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+  )
   (symbol "KSZ8081RND" (in_bom yes) (on_board yes)
     (property "Reference" "U" (id 0) (at -15.24 26.035 0)
       (effects (font (size 1.27 1.27)) (justify left bottom))