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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1. |  CAT25C021P-17TE13 | 2K Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 2. | CAT25C021P-25TE13 | 2K Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 3. | CAT25C021P-28TE13 | 2K Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 4. | CAT25C021P-30TE13 | 2K Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 5. | CAT25C021P-42TE13 | 2K Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 6. | CAT25C021PA-17TE13 | 2K 1.7-1.8V Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 7. | CAT25C021PA-25TE13 | 2K Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 8. | CAT25C021PA-28TE13 | 2K Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 9. | CAT25C021PA-30TE13 | 2K 3.0-3.15V Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 10. | CAT25C021PA-42TE13 | 2K Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 11. | CAT25C021PA-45TE13 | 2K Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 12. | CAT25C021PI-17TE13 | 2K 1.7-1.8V Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 13. | CAT25C021PI-25TE13 | 2K 2.55-2.7V Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 14. | CAT25C021PI-28TE13 | 2K 2.85-3.0V Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 15. | CAT25C021PI-30TE13 | 2K 3.0-3.15V Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 16. | CAT25C021PI-42TE13 | 2K 4.25-4.5V Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 17. | CAT25C021PI-45TE13 | 2K 4.5-4.75V Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 18. | CAT25C021S-17TE13 | 2K Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 19. | CAT25C021S-25TE13 | 2K Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
| 20. | CAT25C021S-28TE13 | 2K Supervisory circuits with SPI serial EEPROM, precision reset controller and watchdog timer | Catalyst Semiconductor | CATALYST | - | - | - | 172 Kb |
