diff --git a/library/memory.dcm b/library/memory.dcm
index 239125bf..48da0c87 100644
--- a/library/memory.dcm
+++ b/library/memory.dcm
@@ -241,6 +241,12 @@ $CMP AM29PDL128G
 D 128 Megabit (8 M x 16-Bit/4 M x 32-Bit), Simultaneous Operation Flash Memory with VersatileIO™ Control
 $ENDCMP
 #
+$CMP AS4C4M16SA
+D 64M – (4M x 16 bit) Synchronous DRAM (SDRAM), TSOP II 54pin
+K SDRAM Synchronus DRAM PC166 PC143 64Mb 16Mbx4
+F https://www.alliancememory.com/wp-content/uploads/pdf/dram/64M-AS4C4M16SA-CI_v3.0_March%202015.pdf
+$ENDCMP
+#
 $CMP AS6C1616
 D 1024k x 16 bit low power CMOS SRAM
 K memory SRAM