SRAM 64k x 1

Cross-Reference

BRAND	TAG	NUMBER	PIN COUNT	OUTPUT	MARKINGS
Hitachi	HM	6287	DIP22-300mil	.	HM6287H HM6287P HM6287LP
Pyramid Semiconductor	P4C	187	DIP22-300mil SOJ24	TS	P4C187 P4C187L

Static Random-Access Memory 64K x 4

Size

bit	Byte (padded 0000000x)	Byte (unpadded)	Hex
64Kb	64KB	8KB	10000hex

Pinout

DIP22
         +---\/---+
      A0 | 1    22| Vcc
      A1 | 2    21| A15
      A2 | 3    20| A14
      A3 | 4    19| A13
      A4 | 5    18| A12
      A5 | 6    17| A11
      A6 | 7    16| A10
      A7 | 8    15| A9
    Dout | 9    14| A8
     *WE |10    13| Din
     GND |11    12| *CE
         +--------+

SOJ24
         +---\/---+
      A0 | 1    24| Vcc
      A1 | 2    23| A15
      A2 | 3    22| A14
      A3 | 4    21| A13
      A4 | 5    20| A12
      A5 | 6    19| A11
      NC | 7    18| NC
      A6 | 8    17| A10
      A7 | 9    16| A9
    Dout |10    15| A8
     *WE |11    14| Din
     GND |12    13| *CE
         +--------+

External links

SRAM page on wikipedia

Files

• 
  HM6287 Datasheet
• 
  P4C187 P4C187L Datasheet