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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 41. | 1N4370A | 2.4 V zener diode | CDIDI | DO-35 | 2 | -65°C | 175°C | 23K |
| 42. | 1N4370A | 2.4 V, 20 mA, zener diode | LRC | DO-35 | 2 | - | - | 36K |
| 43. | 1N4370B | 2.4 V, 20 mA, zener diode | LRC | DO-35 | 2 | - | - | 36K |
| 44. | 1N4371A | 2.7 V zener diode | CDIDI | DO-35 | 2 | -65°C | 175°C | 23K |
| 45. | 1N4372A | 3.0 V zener diode | CDIDI | DO-35 | 2 | -65°C | 175°C | 23K |
| 46. | R1221N43AF-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.3V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 47. | R1221N43AG-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.3V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 48. | R1221N43AG-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.3V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 49. | R1221N43AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.3V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 50. | R1221N43XA-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.3V. 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 |
| 51. | R1221N43XB-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.3V. 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 |
| 52. | R1221N43XC-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.3V. 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 |
| 53. | R1221N43XD-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.3V. 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 |
| 54. | R1221N43XF-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.3V. 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 |
| 55. | R1221N43XG-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.3V. 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 |
| 56. | R1221N43XH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.3V. 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 |
| 57. | R3111N431A-TR | Low voltage detector. Detector threshold (-Vdet) 4.3V. Output type: Nch open drain. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 205K |
| 58. | R3111N431C-TR | Low voltage detector. Detector threshold (-Vdet) 4.3V. Output type: CMOS. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 205K |
| 59. | R3131N43EA-TR | Low voltage detector with built-in delay circuit. Detector threshold 4.3V. Standard output delay time 240ms. Output type Nch open drain. Detection mode H series output. Taping type TR. | RICOH | SOT-23 | 3 | -40°C | 85°C | 273K |
| 60. | R3131N43EC-TR | Low voltage detector with built-in delay circuit. Detector threshold 4.3V. Standard output delay time 240ms. Output type CMOS. Detection mode H series output. Taping type TR. | RICOH | SOT-23 | 3 | -40°C | 85°C | 273K |
