R3121N Series AEC-Q100 Compliant 36 V Input Voltage Detector with Release Delay Function for Automotive Applications No. EC-532-190902 OVERVIEW R3121N is the 36 V Maximum Input Voltage Detector (Maximum Rating50 V). Selectable options of VDD Pin Detection Type (R3121NxxxA), SENSE Pin Detection Type (R3121NxxxE) and VDD Pin Detection without Hysteresis Type (R3121NxxxG), depending on the system configurations. KEY BENEFITS Highly accurate voltage detection with detector threshold accuracy 1.5% (Ta = 25C) Selectable options of VDD Pin Detection, SENSE Pin Detection and VDD Pin Detection without Hysteresis Adjustment of the release delay time (Power-on Reset Time) by connecting external capacitors Reduction of mounting area by using compact package of SOT-23-6 KEY SPECIFICATIONS SELECTION GUIDE Operating Voltage Range (Maximum Rating) : Quantity Product Name Package per Reel R3121NxxxA/G: 1.4 V to 36.0 V (50.0 V) R3121NxxxE : 2.4 V to 6.0 V (7.0 V) R3121Nxxx-TR- E SOT-23-6 3,000 pcs Operating Temperature Range: 40C to 125C xxx: Specify the detector threshold (V ) in the DET Supply Current: R3121NxxxA/G: Typ. 3.8 A range of 3.0 V (030) to 12.0 V (120) in 0.1 V step R3121NxxxE: Typ. 3.5 A * : Select the voltage detection type Detector Threshold Range: A: VDD Pin Detection Type E: SENSE Pin Detection Type 3.0 V to12.0 V ( in 0.1 V step) G: VDD Pin Detection without Hysteresis Type Detector Threshold Accuracy: 1.5% (Ta = 25C) : Quality Class 2.2% to 2.5% (40C Ta 125C) Operating Test Temp. Release Delay Accuracy: Temp. Range A -40C to 125C 25C, High 40% to 80% (40C Ta 125C) K -40C to 125C Low, 25C, High TYPICAL APPLICATIONS VR or DC/DC VR or DC/DC VDD CD SENSE VDD CD R3121NxxxA/G R3121NxxxE DOUT Microprocessor GND 5 V DOUT Microprocessor GND CD C D VDD Pin Detection Type SENSE Pin Detection Type PACKAGES APPLICATIONS Voltage monitoring for accessories such as car audios, car navigation systems, and ETC system SOT-23-6 2.9 x 2.8 x 1.1 (mm) Voltage monitoring for electronic control units such as EV inverter and battery charge control unit 1 R3121N No. EC-532-190902 SELECTION GUIDE The detector threshold, the voltage detection type and the quality class are user selectable options. Selection Guide Product Name Package Quantity per Reel Pb Free Halogen Free R3121Nxxx-TR- E SOT-23-6 3,000 pcs Yes Yes xxx : Specify the detector threshold (VDET) in the range of 3.0 V (030) to 12.0 V (120) in 0.1 V step. : Select the voltage detection type from the following A: VDD Pin Detection Type E: SENSE Pin Detection Type G: VDD Pin Detection without Hysteresis Type : Quality Class Operating Temp. Range Test Temp. A -40C to 125C 25C, High K -40C to 125C Low, 25C, High BLOCK DIAGRAMS R3121NxxxA/R3121NxxxG R3121NxxxE SENSE VDD DOUT VDD DOUT Delay Delay Circuit Circuit Vref Vref GND GND CD CD 2