SRAM 4k x 4

Cross-Reference

BRAND	TAG	NUMBER	PIN COUNT	OUTPUT	MARKINGS
Cypress	CY	7C168	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
Pyramid Semiconductor	P4C	1681	DIP24 LCC28	.	P4C1681
Pyramid Semiconductor	P4C	1682	DIP24 LCC28	.	P4C1682
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
         +--------+

LCC28 (only P4C1681 P4C1682)
+--------------------------------------+
|  5 A4  | 12 I2   | 19 04   | 26 A10  |
|  6 A5  | 13 *CE  | 20 I3   | 27 A11  |
|  7 NC  | 14 GND  | 21 NC   | 28 Vcc  |
|  8 NC  | 15 *WE  | 22 NC   |  1 A0   |
|  9 A6  | 16 01   | 23 I4   |  2 A1   |
| 10 A7  | 17 O2   | 24 A8   |  3 A2   |
| 11 I1  | 18 O3   | 25 A9   |  4 A3   |
+--------------------------------------+

External links

SRAM page on wikipedia

Files

• 
  CXK5416P Datasheet
• 
  CY7C168A Datasheet
• 
  IDT6168SA Datasheet
• 
  MT5C1606 Datasheet
• 
  P4C168 P4C169 P4C170 Datasheet
• 
  P4C1681 P4C1682 Datasheet