DRAM 64k x 4

From Citylan
Revision as of 18:41, 9 September 2014 by WikiSysop (talk | contribs) (→‎Size)
Jump to navigationJump to search

Dynamic Random-Access Memory 64K x 4 (DIP18, 300mil)(LCC18, 330mil)(ZIP20, 100mil)

Size

bit Byte (padded 0000xxxx) Byte (unpadded) Hex
256Kb 64KB 32KB 40000hex

Cross-Reference

BRAND			TAG	NUMBER	CODES

Fujitsu			MB	 81464	MB81464 MB81466
Hitachi			HM	 50464	HM50464
Matsushita		MN	 41464	MN41464
Mitsubishi		M5M	  4464	M5M4464
NEC			uPD	 41464	uPD41464
OKI			MSM	 41464	MSM41464
Samsung			KM	 41464	KM41C464 KM41C466
Sharp			LH	  2464	LH2464
Texas Instruments	TMS	  4464	TMS4464
Toshiba			TC	 51464	TC51464 TC51466

Note:
*464= Page mode
*466= Static column mode


Pinout

DIP18
         +---\/---+
     *OE | 1    18| Vss
     DO1 | 2    17| D04
     DO2 | 3    16| *CAS
     *WE | 4    15| DO3
    *RAS | 5    14| A0
      A6 | 6    13| A1
      A5 | 7    12| A2
      A4 | 8    11| A3
     Vcc | 9    10| A7
         +--------+

LCC18
+---------------------------------------------------------------+
|  3 DO2        |  8 A4         | 12 A2         | 17 D04        |
|  4 *WE        |  9 Vcc        | 13 A1         | 18 Vss        |
|  5 *RAS       | 10 A7         | 14 A0         |  1 *OE        |
|  6 A6         | 11 A3         | 15 DO3        |  2 DO1        |
|  7 A5         |               | 16 *CAS       |               |
+---------------------------------------------------------------+


ZIP20
          ^
   DO3  1 |
          |  2 *CAS
   DO4  3 |
          |  4 Vss
   *OE  5 |
          |  6 DO1
   DO2  7 |
          |  8 *WE
  *RAS  9 |
          | 10 NC
    NC 11 |
          | 12 A6
    A5 13 |
          | 14 A4
   Vcc 15 |
          | 16 A7
    A3 17 |
          | 18 A2
    A1 19 |
          | 20 A0
          -

External links

DRAM page on wikipedia

Files