DRAM 256k x 8: Difference between revisions
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{| style="float: right;" border="1" cellpadding="4" cellspacing="0" class="sortable" | |||
|+ style="background:silver" | Cross-Reference | |||
!BRAND | |||
!TAG | |||
!NUMBER | |||
!PIN COUNT | |||
!OUTPUT | |||
!MARKINGS | |||
|- | |||
|Samsung || KM || 41464 || || || KM64257A KM64257AL KM64257B KM64258B KM64259B KM64260B | |||
|} | |||
'''Dynamic Random-Access Memory 256K x 8''' | |||
=Size= | |||
{| border="1" cellpadding="4" cellspacing="0" | |||
|-align="left" | |||
!bit | |||
!Byte (unpadded) | |||
!Hex | |||
|- | |||
|2Mb || 256KB || 200000hex | |||
|} | |||
=Pinout= | |||
<pre> | <pre> | ||
SOJ40 - TSOP40 | |||
+---\/---+ | |||
Vss | 1 40| Vss | |||
SC | 2 39| SDQ7 | |||
SDQ0 | 3 38| SDQ6 | |||
SDQ1 | 4 37| SDQ5 | |||
SDQ2 | 5 36| SDQ4 | |||
SDQ3 | 6 35| *SE | |||
*DT/*OE | 7 34| W7/DQ7 | |||
W0/DQ0 | 8 33| W6/DQ6 | |||
W1/DQ1 | 9 32| W5/DQ5 | |||
W2/DQ2 |10 31| W4/DQ4 | |||
W3/DQ3 |11 30| Vss | |||
*WB/*WE |12 29| DSF | |||
Vss |13 28| NC | |||
*RAS |14 27| *CAS | |||
A8 |15 26| QSF | |||
A7 |16 25| A0 | |||
A6 |17 24| A1 | |||
A5 |18 23| A2 | |||
A4 |19 22| A3 | |||
Vcc |20 21| Vss | |||
+--------+ | |||
ZIP40 | |||
^ | |||
Vss 1 | | |||
| 2 W4/DQ4 | |||
W5/DQ5 3 | | |||
| 4 W6/DQ6 | |||
W7/DQ7 5 | | |||
| 6 *SE | |||
SDQ5 7 | | |||
| 8 SDQ4 | |||
SDQ7 9 | | |||
| 10 SDQ6 | |||
Vss 11 | | |||
| 12 Vcc | |||
SC 13 | | |||
| 14 SDQ0 | |||
DQ1 15 | | |||
| 16 SDQ2 | |||
DQ3 17 | | |||
| 18 *DT/*OE | |||
W0/DQ0 19 | | |||
| 20 W1/DQ1 | |||
W2/DQ2 21 | | |||
| 22 W3/DQ3 | |||
Vss 23 | | |||
| 24 *WB/*WE | |||
*RAS 25 | | |||
| 26 A8 | |||
A7 27 | | |||
| 28 A6 | |||
A5 29 | | |||
| 30 A4 | |||
A3 31 | | |||
| 32 Vcc | |||
A2 33 | | |||
| 34 A1 | |||
A0 35 | | |||
| 36 QSF | |||
GND 37 | | |||
| 38 *CAS | |||
NC 39 | | |||
| 40 DSF | |||
- | |||
</pre> | </pre> | ||
[ | =External links= | ||
[https://en.wikipedia.org/wiki/Dynamic_random-access_memory DRAM page on wikipedia] | |||
=Files= | |||
<gallery widths="150px"> | |||
File:km428c256.pdf|KM428C256 Datasheet | |||
</gallery> | |||
[[Category:RAM]] | [[Category:RAM]] | ||
[[Category: | [[Category:SOJ40]] | ||
[[Category:TSOP40]] | |||
[[Category:ZIP40]] | |||
Revision as of 09:44, 19 February 2017
| BRAND | TAG | NUMBER | PIN COUNT | OUTPUT | MARKINGS |
|---|---|---|---|---|---|
| Samsung | KM | 41464 | KM64257A KM64257AL KM64257B KM64258B KM64259B KM64260B |
Dynamic Random-Access Memory 256K x 8
Size
| bit | Byte (unpadded) | Hex |
|---|---|---|
| 2Mb | 256KB | 200000hex |
Pinout
SOJ40 - TSOP40
+---\/---+
Vss | 1 40| Vss
SC | 2 39| SDQ7
SDQ0 | 3 38| SDQ6
SDQ1 | 4 37| SDQ5
SDQ2 | 5 36| SDQ4
SDQ3 | 6 35| *SE
*DT/*OE | 7 34| W7/DQ7
W0/DQ0 | 8 33| W6/DQ6
W1/DQ1 | 9 32| W5/DQ5
W2/DQ2 |10 31| W4/DQ4
W3/DQ3 |11 30| Vss
*WB/*WE |12 29| DSF
Vss |13 28| NC
*RAS |14 27| *CAS
A8 |15 26| QSF
A7 |16 25| A0
A6 |17 24| A1
A5 |18 23| A2
A4 |19 22| A3
Vcc |20 21| Vss
+--------+
ZIP40
^
Vss 1 |
| 2 W4/DQ4
W5/DQ5 3 |
| 4 W6/DQ6
W7/DQ7 5 |
| 6 *SE
SDQ5 7 |
| 8 SDQ4
SDQ7 9 |
| 10 SDQ6
Vss 11 |
| 12 Vcc
SC 13 |
| 14 SDQ0
DQ1 15 |
| 16 SDQ2
DQ3 17 |
| 18 *DT/*OE
W0/DQ0 19 |
| 20 W1/DQ1
W2/DQ2 21 |
| 22 W3/DQ3
Vss 23 |
| 24 *WB/*WE
*RAS 25 |
| 26 A8
A7 27 |
| 28 A6
A5 29 |
| 30 A4
A3 31 |
| 32 Vcc
A2 33 |
| 34 A1
A0 35 |
| 36 QSF
GND 37 |
| 38 *CAS
NC 39 |
| 40 DSF
-
External links
Files
-
KM428C256 Datasheet
