SRAM 16k x 4

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Cross-Reference
BRAND TAG NUMBER PIN COUNT OUTPUT MARKINGS
Pyramid Semiconductor P4C 188 DIP22 LCC22 TS P4C188 P4C188L
Texas Instruments TMS 4416 DIP18 LCC18 TS TMS4416 SMJ4416

Static Random-Access Memory 16K x 4 (DIP18, 300mil)(DIP22, 300mil)(LCC18)(LCC22)

Size

bit Byte (padded 0000xxxx) Byte (unpadded) Hex
64Kb 16KB 8KB 10000hex

Pinout

DIP22 (ONLY P4C188)
         +---\/---+
      A0 | 1    22| Vcc
      A1 | 2    21| A13
      A2 | 3    20| A12
      A3 | 4    19| A11
      A4 | 5    18| A10
      A5 | 6    17| A9
      A6 | 7    16| I/O4
      A7 | 8    15| I/O3
      A8 | 9    14| I/O2
     *CE | 10   13| I/O1
     GND | 11   12| *WE
         +--------+

DIP18
         +---\/---+
      *G | 1    18| Vss
     DQ1 | 2    17| SQ4
     DQ2 | 3    16| *CAS
      *W | 4    15| DQ3
    *RAS | 5    14| A0
      A6 | 6    13| A1
      A5 | 7    12| A2
      A4 | 8    11| A3
     Vdd | 9    10| A7
         +--------+

LCC22
+----------------------------------------+
|  3 A2  |          | 14 I/O2  |         |
|  4 A3  | 10 *CE   | 15 I/O3  | 21 A13  |
|  5 A4  | 11 GND   | 16 I/04  | 22 Vcc  |
|  6 A5  | 12 *WE   | 17 A9    |  1 A0   |
|  7 A6  | 13 I/O1  | 18 A10   |  2 A1   |
|  8 A7  |          | 19 A11   |         |
|  9 A8  |          | 20 A12   |         |
+----------------------------------------+

LCC18
+-----------------------------------------+
|  3 DQ2   |  8 A4   | 12 A2    | 17 DQ4  |
|  4 *W    |  9 Vdd  | 13 A1    | 18 Vss  |
|  5 *RAS  | 10 A7   | 14 A0    |  1 *G   |
|  6 A6    | 11 A3   | 15 DQ3   |  2 DQ1  |
|  7 A7    |         | 16 *CAS  |         |
+-----------------------------------------+

External links

SRAM page on wikipedia

Files