| NEC RAM chip marking |
| NEC |
www.necel.com
Merged with Hitachi's RAM business to Elpida
www.elpida.com |
| D / µPD |
D - NEC Electronics
µPD - NEC Electronics |
| 42 - RAM type |
42 - DRAM
45 - SDRAM
48 - CMOS |
| 64 - memory density |
2 - 2MBit
4 - 4MBit
8 - 8MBit
16 - 16MBit
32 - 32MBit
64 - 64MBit
65 - 64MBit Virtual Channel |
| 8 - bit organization |
4 - x4
8 - x8
16 - x16 |
| 3 - banks / interface |
3 - 4 banks, LVTTL interface [16bit and higher only]
21 - 2 banks, 1 - LVTTL interface
41 - 4 banks, 1 - LVTTL interface [1 to 8bit] |
| G5 - package option |
G5 - 54pin plastic TSOP II
G6 -
GF - |
| A - voltage |
[none] - 5.0V
A - 3.3V |
| 36 - min cycle time |
10 - 10ns 100MHz
29
36
53
75 - 7.5ns 133MHz
80 - 8.0ns 125MHz |
| C - die revision |
A/B/C ... |
| 9JF - ? |
? |
| 9925 - date of manufacture |
99 - year of manufacture
25 - week of manufacture |
| ES - engineering sample |
ES - engineering sample |
| 7091 - Serialization code |
? |
