DRAM 64k x 1

Dynamic Random-Access Memory 64K x 1 (DIP16, 300mil)

Size

bit	Byte	Hex
64Kb	8KB	10000hex

Cross-Reference

BRAND			TAG	NUMBER	CODES

Micron			MI	  4264	MT4264
National Semiconductor	NMC	  3764	NMC3764 NMC4164
NEC			uPD	  4164	uPD4164C uPD4164D uPD4265C
OKI			MSM	  3764	MSM3764 MSM3764A
Samsung			KM	  4164	KM4164
Texas Instruments	TMS	  4164	TMS4164
Toshiba			TMM	  4164	TMM4164AP TMM4164C TMM4164P

Note:
*64= Page mode
*65= Automatic pulse refresh

Pinout

DIP16
     +--\/--+
     |1   16| GND
 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 Vdd        | 13 A3         | 18 Vss        |
|  5 NC         | 10 A7         | 14 NC         |  1 A8         |
|  6 A0         | 11 A5         | 15 A6         |  2 Din        |
|  7 A2         |               | 16 Dout       |               |
+---------------------------------------------------------------+

External links

DRAM page on wikipedia

Files

• 21256 Datasheet

  21256 Datasheet