diff --git a/litedram/modules.py b/litedram/modules.py
index 9f57462..b22b96e 100644
--- a/litedram/modules.py
+++ b/litedram/modules.py
@@ -203,3 +203,18 @@ class MT41K256M16(SDRAMModule):
     tWTR  = 8
     tREFI = 64*1000*1000/8192
     tRFC  = 260
+
+
+class MT41J256M16(SDRAMModule):
+    memtype = "DDR3"
+    # geometry
+    nbanks = 8
+    nrows  = 32768
+    ncols  = 1024
+    # timings (-125 speedgrade)
+    tRP   = 13.75
+    tRCD  = 13.75
+    tWR   = 15
+    tWTR  = 8
+    tREFI = 64*1000*1000/8192
+    tRFC  = 260