DRAM 256k x 4: Difference between revisions

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!MARKINGS
!MARKINGS
|-
|-
|Samsung || KM || 44C256 || DIP20 SOJ20 ZIP20 || . || KM44C256
|Samsung || KM || 44C256 || DIP20-300mil SOJ20 ZIP20 || . || KM44C256
|-
|-
|Samsung || KM || 44C258 || DIP20 SOJ20 ZIP20 || . || KM44C258
|Samsung || KM || 44C258 || DIP20-300mil SOJ20 ZIP20 || . || KM44C258
|-
|-
|Note:
|Note:
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[[Category:RAM]]
[[Category:RAM]]
[[Category:DIP20]]
[[Category:DIP20-300mil]]
[[Category:SOJ20]]
[[Category:SOJ20]]
[[Category:ZIP20]]
[[Category:ZIP20]]

Revision as of 18:03, 15 February 2017

Cross-Reference
BRAND TAG NUMBER PIN COUNT OUTPUT MARKINGS
Samsung KM 44C256 DIP20-300mil SOJ20 ZIP20 . KM44C256
Samsung KM 44C258 DIP20-300mil SOJ20 ZIP20 . KM44C258
Note:
  • 256= Fast page mode
  • 258= Static column mode

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
          -

External links

DRAM page on wikipedia

Files