diff --git a/alliance/share/cells/sxlib/powmid_x0.ap b/alliance/share/cells/sxlib/powmid_x0.ap
new file mode 100644
index 00000000..72a61c6a
--- /dev/null
+++ b/alliance/share/cells/sxlib/powmid_x0.ap
@@ -0,0 +1,16 @@
+V ALLIANCE : 6
+H powmid_x0,P, 6/ 4/2000,100
+A 0,0,3500,5000
+S 0,300,3500,300,600,vss,RIGHT,CALU1
+S 0,4700,3500,4700,600,vdd,RIGHT,CALU1
+S 1000,0,1000,5000,1200,vdd,DOWN,CALU3
+S 2500,0,2500,5000,1200,vss,DOWN,CALU3
+B 1000,500,1200,200,CONT_VIA2,*
+B 2500,500,1200,200,CONT_VIA2,*
+B 2500,4500,1200,200,CONT_VIA2,*
+B 1000,4500,1200,200,CONT_VIA2,*
+B 2500,500,1200,200,CONT_VIA,*
+B 1000,500,1200,200,CONT_VIA,*
+B 2500,4500,1200,200,CONT_VIA,*
+B 1000,4500,1200,200,CONT_VIA,*
+EOF
diff --git a/alliance/share/cells/sxlib/powmid_x0.vbe b/alliance/share/cells/sxlib/powmid_x0.vbe
new file mode 100644
index 00000000..03293e5d
--- /dev/null
+++ b/alliance/share/cells/sxlib/powmid_x0.vbe
@@ -0,0 +1,14 @@
+ENTITY powmid_x0 IS
+PORT (
+  vdd	 : in  BIT;
+  vss	 : in  BIT
+);
+END powmid_x0;
+
+ARCHITECTURE behaviour_data_flow OF powmid_x0 IS
+
+BEGIN
+  ASSERT (vdd and not (vss))
+  REPORT "power supply is missing on powmid_x0"
+  SEVERITY WARNING;
+END;