SRAM 64k x 4

Cross-Reference

BRAND	TAG	NUMBER	MARKINGS
Cypress	CY7	194	CY7C192 CY7C194 CY7C195 CY7C196 CY7C67081 CY7C67082
Fujitsu	MB	8184	MB81C84A MB81C86
Hitachi	HM	6208	HM6208 HM6709 HM6709AJP HM6709SHJP
IDT	IDT	71258	IDT71258 IDT61258 IDT71281S IDT71281L IDT71282S IDT71282L
Mitsubishi	M5M	5259	M5M5259B
Motorola	MCM	6209	MCM6209C
NEC	uPD	3254	uPD43254CR
Samsung	KM	41464	KM64257A KM64257AL KM64257B KM64258B KM64259B KM64260B
Sony	CXK	54256	CXK54256
Toshiba	TC	55464	TC55464 TC55465

Static Random-Access Memory 64K x 4 (DIP24, 300mil)(DIP28, 300mil)(SOJ24, 300mil)(SOJ28, 300mil)

Size

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

Pinout

DIP24 - SOJ24
         +---\/---+
      A6 | 1    24| Vcc
      A7 | 2    23| A5
      A8 | 3    22| A4
      A9 | 4    21| A3
     A10 | 5    20| A2
     A11 | 6    19| A1
     A12 | 7    18| A0
     A13 | 8    17| I/O3
     A14 | 9    16| I/O2
     A15 |10    15| I/O1
     *CE |11    14| I/O0
     GND |12    13| *WE
         +--------+

DIP28 - SOJ28
         +---\/---+
      NC | 1    28| Vcc
      A6 | 2    27| A5
      A7 | 3    26| A4
      A8 | 4    25| A3
      A9 | 5    24| A2
     A10 | 6    23| A1
     A11 | 7    22| A0
     A12 | 8    21| NC
     A13 | 9    20| *CE2/NC
     A14 |10    19| I/O3
     A15 |11    18| I/O2
    *CE1 |12    17| I/O1
     *OE |13    16| I/O0
     GND |14    15| *WE
         +--------+

External links

SRAM page on wikipedia

Files

• 

  CY7C194 CY7C195 CY7C196 Datasheet

• 

  IDT71281S IDT71281L IDT71282S IDT71282L Datasheet

• 

  KM64259B KM64260B Datasheet