SRAM 4k x 4

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Cross-Reference
BRAND TAG NUMBER PIN COUNT OUTPUT MARKINGS
Cypress CY7 168 DIP20 TS CY7C168A
Integrated Dev. Tech. IDT 6168 DIP20 . IDT6168SA IDT6168LA
Micron MT 1606 DIP24 . MT5C1606
Micron MT 1607 DIP24 . MT5C1607
Pyramid Semiconductor P4C 168 DIP20 . P4C168 P4C168L
Pyramid Semiconductor P4C 169 DIP20 . P4C169
Pyramid Semiconductor P4C 170 DIP22 . P4C170
Sony CXK 5416 DIP20 TS CXK5416P

Static Random-Access Memory 4K x 4 (DIP20, 300mil)(DIP22, 300mil)(DIP24, 300mil)

Size

bit Byte (padded 0000xxxx) Byte (unpadded) Hex
4Kb 4KB 2KB 1000hex

Pinout

DIP24
         +---\/---+
      A4 | 1    24| Vcc
      A5 | 2    23| A3
      A6 | 3    22| A2
      A7 | 4    21| A1
      A8 | 5    20| A0
      A9 | 6    19| D4
     A10 | 7    18| D3
     A11 | 8    17| Q4
      D1 | 9    16| Q3
      D2 |10    15| Q2
     *CE |11    14| Q1
     GND |12    13| *WE
         +--------+

DIP22 (only P4C170)
         +---\/---+
      A0 | 1    22| Vcc
      A1 | 2    21| A11
      A2 | 3    20| A10
      A3 | 4    19| A9
      A4 | 5    18| A8
      A5 | 6    17| NC
      A6 | 7    16| I/O4
      A7 | 8    15| I/O3
     *CS | 9    14| I/O2
     *OE |10    13| I/O1
     GND |11    12| *WE
         +--------+

DIP20
         +---\/---+
      A4 | 1    20| Vcc
      A5 | 2    19| A3
      A6 | 3    18| A2
      A7 | 4    17| A1
      A8 | 5    16| A0
      A9 | 6    15| I/O0
     A10 | 7    14| I/O1
     A11 | 8    13| I/O2
     *CE | 9    12| I/O3
     GND |10    11| *WE
         +--------+

External links

SRAM page on wikipedia

Files