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| PDM31564SA20SO | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers |  |  |
| PDM31564SA20SOA | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
| PDM31564SA20SOATR | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
| PDM31564SA20SOATY | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
| PDM31564SA20SOITR | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
| PDM31564SA20SOITY | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
| PDM31564SA20SOTR | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
| PDM31564SA20SOTY | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
| PDM31564SA20T | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
| PDM31564SA20TA | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
| PDM31564SA20TA | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
| PDM31564SA20TATR | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
| PDM31564SA20TATY | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
| PDM31564SA20TI | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
| PDM31564SA20TITY | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
| PDM31564SA20TTR | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
| PDM31564SA20TTY | 256K x 16 CMOS 3.3V static RAM | List of Unclassifed Manufacturers | | |
