OKI Electronic RAM chip marking & reference


On chip top M41464-10
OKI
JAPAN 981010
  M51V4260-70J
 
  M51V17160-70J
 
  51V17405B-60
 

OKI Electronic RAM chip marking
OKI Electronic www.okisemi.com
MSM / M MSM - Oki Electronic
M - Oki Electronic
51 - RAM type 41 - ?
51 - ?
V - voltage V - 3.3V
[none] - 5.0V
1 - memory density 1 - 1MBit ?
4 - 4MBit
8 - 8MBit
16 - 16MBit ?
7 - refresh 8 - 1K refresh
7 - 2K refresh
6 - 4K refresh
26 - bit organization 4MBit:
10 - 4MBit x 1
26 - 256kBit x 16
40 - 1MBit x 4
80 - 512kBit x 8
90 - 512kBit x 9
16MBit
10 - 16MBit x 1
16 - 1MBit x 16
40 - 4MBit x 4
80 - 2MBit x 8
 
0 - RAM type 0 - Fast Page
5 - EDO
10 - min cycle time 10 - 100ns
60 - 60ns
70 - 70ns
J - package option J - SOJ
TS - TSOP
C - ?
B - die revision A/B/C ...
9812 - date of manufacture 98 - year of manufacture
12 - week of manufacture
B2124 - Serialization code ?