DRAM 256k x 4: Difference between revisions
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!MARKINGS | !MARKINGS | ||
|- | |- | ||
|OKI || MSM || 514256 || DIP20-300mil SOJ26-300mil ZIP20 || . || M514256 M514256C MSM514256A | |OKI || MSM || 514256 || DIP20-300mil SOJ26/20-300mil ZIP20 || . || M514256 M514256C MSM514256A | ||
|- | |- | ||
|Samsung || KM || 44C256 || DIP20-300mil SOJ20 ZIP20 || . || KM44C256 KM44C256CP | |Samsung || KM || 44C256 || DIP20-300mil SOJ20 ZIP20 || . || KM44C256 KM44C256CP | ||
| Line 14: | Line 14: | ||
|Samsung || KM || 44C258 || DIP20-300mil SOJ20 ZIP20 || . || KM44C258 | |Samsung || KM || 44C258 || DIP20-300mil SOJ20 ZIP20 || . || KM44C258 | ||
|- | |- | ||
|Siemens || HYB || 514256 || DIP20-300mil SOJ26-300mil || . || HYB514256 HYB514256B | |Siemens || HYB || 514256 || DIP20-300mil SOJ26/20-300mil || . || HYB514256 HYB514256B | ||
|- | |- | ||
|Toshiba || TC || 514256 || DIP20-300mil SOJ26-300mil ZIP20 || . || TC514256 TC514256A | |Toshiba || TC || 514256 || DIP20-300mil SOJ26/20-300mil ZIP20 || . || TC514256 TC514256A | ||
|- | |- | ||
|Note: | |Note: | ||
| Line 77: | Line 77: | ||
- | - | ||
SOJ26-300mil | SOJ26/20-300mil | ||
+---\/---+ | +---\/---+ | ||
DQ1 | 1 26| Vss | DQ1 | 1 26| Vss | ||
| Line 110: | Line 110: | ||
[[Category:DIP20-300mil]] | [[Category:DIP20-300mil]] | ||
[[Category:SOJ20]] | [[Category:SOJ20]] | ||
[[Category:SOJ26-300mil]] | [[Category:SOJ26/20-300mil]] | ||
[[Category:ZIP20]] | [[Category:ZIP20]] | ||
Latest revision as of 16:36, 5 February 2024
| BRAND | TAG | NUMBER | PIN COUNT | OUTPUT | MARKINGS |
|---|---|---|---|---|---|
| OKI | MSM | 514256 | DIP20-300mil SOJ26/20-300mil ZIP20 | . | M514256 M514256C MSM514256A |
| Samsung | KM | 44C256 | DIP20-300mil SOJ20 ZIP20 | . | KM44C256 KM44C256CP |
| Samsung | KM | 44C258 | DIP20-300mil SOJ20 ZIP20 | . | KM44C258 |
| Siemens | HYB | 514256 | DIP20-300mil SOJ26/20-300mil | . | HYB514256 HYB514256B |
| Toshiba | TC | 514256 | DIP20-300mil SOJ26/20-300mil ZIP20 | . | TC514256 TC514256A |
Note:
|
Dynamic Random-Access Memory 256K x 4
Size
| bit | Byte (padded 0000xxxx) | Byte (unpadded) | Hex |
|---|---|---|---|
| 1Mb | 256KB | 128KB | 100000hex |
Pinout
DIP20 SOJ20
+---\/---+
DQ1 | 1 20| Vss
DQ2 | 2 19| DQ4
*W | 3 18| DQ3
*RAS | 4 17| *CAS
NC | 5 16| *G
A0 | 6 15| A8
A1 | 7 14| A7
A2 | 8 13| A6
A3 | 9 12| A5
Vcc |10 11| A4
+--------+
ZIP20
^
*G 1 |
| 2 *CAS
DQ3 3 |
| 4 DQ4
Vss 5 |
| 6 DQ1
DQ2 7 |
| 8 *W
*RAS 9 |
| 10 NC
A0 11 |
| 12 A1
A2 13 |
| 14 A3
Vcc 15 |
| 16 A4
A5 17 |
| 18 A6
A7 19 |
| 20 A8
-
SOJ26/20-300mil
+---\/---+
DQ1 | 1 26| Vss
DQ2 | 2 25| DQ4
*WE | 3 24| DQ3
*RAS | 4 23| *CAS
NC | 5 22| *OE
| 6 21|
| 7 20|
| 8 19|
A0 | 9 18| A8
A1 |10 17| A7
A2 |11 16| A6
A3 |12 15| A5
Vcc |13 14| A4
+--------+
External links
Files
-
KM44C256 KM44C258 Datasheet
-
HYB514256 Datasheet
-
MSM514256A Datasheet
-
TC514256 Datasheet
