DRAM 256k x 1
From Citylan
| Brand | Tag | Number | Codes |
|---|---|---|---|
| Fujitsu | MB | 81256 | MB81256 MB81257 MB81258 |
| Goldstar | GM | 71C256 | GM71256 GM71C256 |
| Hitachi | HM | 51256 | HM51256P HM51256CP HM51256LP HM51256LCP HM51256ZP HM51256LZP HM51258P |
| Hyundai | HY | 53C256 | HY53C256S HY53C256LS HY53C256F HY53C256LF |
| Matsushita | MN | 41256 | MN41256 |
| Micron | MI | 1256 | MI1256 |
| Mitsubishi | M5M | 4256 | M5M4256AP M5M4256AJ M5M4256AL M5M4256P M5M4256S M5M4257A M5M4257J M5M4257P M5M4257S |
| Motorola | MCM | 6256 | MCM6256 MC6256B MCM6257B |
| NEC | uPD | 41256 | uPD41256C uPD41256L uPD41257C uPD41257L |
| OKI | MSM | 41256 | MSM41256A MSM51C256 MSM51257 |
| Samsung | KM | 41256 | KM41256A KM41256AJ KM41256AP KM41256AZ KM41257A KM41C256 KM41C257 KM41C258 |
| Sharp | LH | 21256 | LH21256 LH21257 LH21258 |
| Siemens | HYB | 41256 | HYB41256 |
| Texas Instruments | TMS | 4256 | TMS4256 TMS4257 |
| Toshiba | TC | 51256 | TC51256P TC51256PL TC51256T TC51256TL TC51256Z TC51256ZL TC51256 TC51257 TC51258 |
Dynamic Random-Access Memory 256K x 1 (DIP16, 300mil)(LCC18, 330mil)
Speed
| bit | Byte | Hex |
|---|---|---|
| 256Kb | 32KB | 40000hex |
Cross-Reference
BRAND TAG NUMBER Fujitsu MB 81256 MB81256 MB81257 MB81258 Goldstar GM 71C256 GM71256 GM71C256 Hitachi HM 51256 HM51256P HM51256CP HM51256LP HM51256LCP HM51256ZP HM51256LZP HM51258P Hyundai HY 53C256 HY53C256S HY53C256LS HY53C256F HY53C256LF Matsushita MN 41256 MN41256 Micron MI 1256 MI1256 Mitsubishi M5M 4256 M5M4256AP M5M4256AJ M5M4256AL M5M4256P M5M4256S M5M4257A M5M4257J M5M4257P M5M4257S Motorola MCM 6256 MCM6256 MC6256B MCM6257B NEC uPD 41256 uPD41256C uPD41256L uPD41257C uPD41257L OKI MSM 41256 MSM41256A MSM51C256 MSM51257 Samsung KM 41256 KM41256A KM41256AJ KM41256AP KM41256AZ KM41257A KM41C256 KM41C257 KM41C258 Sharp LH 21256 LH21256 LH21257 LH21258 Siemens HYB 41256 HYB41256 Texas Instruments TMS 4256 TMS4256 TMS4257 Toshiba TC 51256 TC51256P TC51256PL TC51256T TC51256TL TC51256Z TC51256ZL TC51256 TC51257 TC51258 Note: *256= Page mode *257= Nibble mode *258= Static column mode
Pinout
DIP16
+--\/--+
A8 |1 16| Vss
Din |2 15| *CAS
*WE |3 14| Dout
*RAS|4 13| A6
A0 |5 12| A3
A2 |6 11| A4
A1 |7 10| A5
Vcc |8 9| A7
+------+
LCC18
+---------------------------------------------------------------+
| 3 *WE | 8 A1 | 12 A4 | 17 *CAS |
| 4 *RAS | 9 Vcc | 13 A3 | 18 Vss |
| 5 NC | 10 A7 | 14 NC | 1 A8 |
| 6 A0 | 11 A5 | 15 A6 | 2 Din |
| 7 A2 | | 16 Dout | |
+---------------------------------------------------------------+
ZIP16
^
| 1 A6
Dout 2 |
| 3 *CAS
Vss 4 |
| 5 A8
Din 6 |
| 7 *we
*RAS 8 |
| 9 A0
A2 10 |
| 11 A1
Vcc 12 |
| 13 A7
A6 14 |
| 15 A4
A3 16 |
-
External links
Files
-
21256 Datasheet
-
81256 Datasheet
-
81257 Datasheet
-
51256 Datasheet
-
51258 Datasheet
-
53C256 Datasheet
-
71256 Datasheet
-
4256 Datasheet
-
6256 Datasheet
-
uPD41256 Datasheet
-
uPD41257 Datasheet
-
MSM41256 Datasheet
-
HYB41256 Datasheet
-
KM41256-KM41257 Datasheet
-
TMS4256-TMS4257 Datasheet
