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R1221N42XA-TR Similar

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R1221N42XA-TR Datasheet and R1221N42XA-TR manual

Manufacturer : Ricoh 

Packing : SOT-23 

Pins : 6 

Temperature : Min -40 °C | Max 85 °C

Size : 239 KB

Application : Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.2V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 300kHz 

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