| IBM RAM chip marking |
| IBM |
www.ibm.com |
| IBM |
IBM - International Business Machines |
| 0 - RAM type |
0 - ?
03 - ? |
| 64 - memory density |
14 - 4MBit
11 - 16MBit
16 - 64MBit
64 - 64MBit
25 - VRAM |
| 16 - bit organization |
4MBit:
16 - 256K x 16
80 - 512K x 8
40 - 1024K x 4
|
16MBit:
16 - 1024K x 16
80 - 2048K x 8
40 - 4096K x 4
|
VRAM:
160 - 256K x 16
161 - 256K x 16
170 - 256K x 16
171 - 256K x 16 |
| 6 - refresh |
8 - 1K refresh
7 - 2K refresh
6 - 4K refresh |
| 60 - min cycle time |
10 - 10.0ns
50 - 50.0ns
60 - 60.0ns
70 - 70.0ns
80 - 8.0ns |
| B - voltage |
[blank] - 5.0V
L - 5.0V [VRAM]
M - 5.0V low power
B - 3.3V
N - 3.3V [VRAM]
P - 3.3V low power |
| J - package option |
C5 -
T3 - |
| C - die revision |
A/B/C ... |
| 20L9423 - IBM chip number |
20L9423
63G9501
63G9504 |
| 9352 - date of manufacture |
98 - year of manufacture
12 - week of manufacture |
| 935603170 - Serialization code |
? |
