DRAM 2k x 1

Cross-Reference

BRAND	TAG	NUMBER	PIN COUNT	OUTPUT	MARKINGS
National Semiconductors	MM	4262	22		MM4262 MM4262D
National Semiconductors	MM	5262	22		MM5262 MM5262D MM5262N

Dynamic Random-Access Memory 2K x 1 (DIP22, 300mil)

Size

bit	Byte (padded 0000000x)	Byte (unpadded)	Hex
2Kb	2kB	256B	800hex

Pinout

DIP22
         +---\/---+
     Vbb | 1    22| *CHIP SELECT
      NC | 2    21| DATA IN
    *R/W | 3    20| Vss
DATA OUT | 4    19| CLOCK1
     Vdo | 5    18| CLOCK3
      A5 | 6    17| CLOCK2
      A6 | 7    16| A4
      A7 | 8    15| A3
      A8 | 9    14| A2
      A9 | 10   13| A1
     A10 | 11   12| A0
         +--------+

External links

DRAM page on wikipedia

Files

• 
  MM4262 / MM5262 Datasheet