NVRAM 8k x 8

Cross-Reference SRAM

BRAND	TAG	NUMBER	PIN COUNT	OUTPUT	MARKINGS
Dallas	DS	1643	28	.	DS1643
ST Microelectronics	ST	M48	28	.	M48T08 M48T18

Non-Volatile Random-Access Memory 8K x 8 (DIP28, 600mil)

Size

bit	Byte	Hex
65Kb	8KB	10000hex

Pinout

DIP28
         +---\/---+
      NC | 1    28| Vcc
     A12 | 2    27| *WE
      A7 | 3    26| CE2
      A6 | 4    25| A8
      A5 | 5    24| A9
      A4 | 6    23| A11
      A3 | 7    22| *OE
      A2 | 8    21| A10
      A1 | 9    20| *CE
      A0 |10    19| I/O7
    I/O0 |11    18| I/O6
    I/O1 |12    17| I/O5
    I/O2 |13    16| I/O4
     GND |14    15| I/O3
         +--------+

External links

NVRAM page on wikipedia

Files

• 

  DS1643 Datasheet

• 

  M48Z08 M48Z18 Datasheet