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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1641. | R1221N50AA-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1642. | R1221N50AB-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1643. | R1221N50AD-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1644. | R1221N50AE-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1645. | R1221N50AF-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1646. | R1221N50AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1647. | R1221N50XA-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1648. | R1221N50XB-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1649. | R1221N50XC-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1650. | R1221N50XD-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1651. | R1221N50XE-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1652. | R1221N50XF-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1653. | R1221N50XG-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1654. | R1221N50XG-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1655. | R1221N50XH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1656. | R3111N501A-TR | Low voltage detector. Detector threshold (-Vdet) 5.0V. Output type: Nch open drain. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 205K |
| 1657. | R3111N511A-TR | Low voltage detector. Detector threshold (-Vdet) 5.1V. Output type: Nch open drain. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 205K |
| 1658. | R3111N521A-TR | Low voltage detector. Detector threshold (-Vdet) 5.2V. Output type: Nch open drain. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 205K |
| 1659. | R3111N531A-TR | Low voltage detector. Detector threshold (-Vdet) 5.3V. Output type: Nch open drain. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 205K |
| 1660. | R3111N541A-TR | Low voltage detector. Detector threshold (-Vdet) 5.4V. Output type: Nch open drain. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 205K |
