R3118K291A-TR Nisshinbo

R3118x Series Low Voltage Detector with Individual SENSE Pin and Delay Function No. EA-242-210412 OUTLINE The R3118x is a voltage detector IC with individual sense pin, high detector threshold accuracy and delay time, and ultra-low supply current, which can be operated at an extremely low voltage and is used for system reset as an example. Each of the IC consists of a voltage reference unit, a hysteresis comparator, resistors net for detector threshold setting, an output driver transistor, and a delay circuit. VDD supply pin for the IC and voltage supervisory sense pin are individual, therefore the output pin can keep level even if the sense pin voltage is going down to 0 V, or there is no indefinite range for the sense pin. Since a delay circuit is built-in, by connecting an external capacitor, any output delay time can be set. In the R3118x, detector released delay time can be set, and detector delay time is not influenced by the external capacitor for the delay time. The detector threshold is fixed with high accuracy internally and does not require any adjustment. The tolerance of the detector threshold is 22.5 mV (VDET S < 1.6 V) or 1.5% (VDET S 1.6 V). Minimum detector threshold voltage is 0.6 V, ultra-low voltage detector threshold can be set. Output delay time for the detector release can be set with high accuracy. The tolerance of the IC side is 30%. Two output types, Nch. open drain type and CMOS type are available. If the sense pin voltage becomes to equal or lower than the detector threshold voltage, the output voltage becomes, and if the sense pin voltage becomes to released voltage, the output voltage becomes after the set delay time. Three types of packages, SOT-23-5, SC-88A, and DFN(PLP)1212-6 are available. (1) FEATURES Operating Voltage Range (Maximum Rating) .............. 1.0 V to 6.0 V (7.0 V) (2) Supply Current .......................................................... Typ. 0.4 A (VSENSE +VDET, VDD = 6 V) Operating Temperature Range .................................... 40C to 85C Detector Threshold Range ........................................... 0.6 V to 5.0 V (0.1 V step) Accuracy Detector Threshold ...................................... 1.5% (-V 1.6 V), 22.5 mV (-V < 1.6 V) DET S DET S Temperature-Drift Coefficient of Detector Threshold Typ. 30 ppm/C Accuracy Detector Released ...................................... 30% Temperature-Drift Coefficient of Detector Released Typ. 0.16 ppm/C Output Types ................................................................ Nch Open Drain and CMOS Packages ..................................................................... DFN(PLP)1212-6, SC-88A , SOT-23-5 APPLICATIONS CPU and Logic Circuit Reset Battery Checker Window Comparator/Level Discrimination Battery Back-up Circuit Power Failure Detector (1) Ta = 25C, unless otherwise specified. (2) Consumption current through SENSE pin is not included. 1 R3118x No. EA-242-210412 SELECTION GUIDE The detector threshold, the output type and the package type for the IC can be selected at the users request. Selection Guide Product Name Package Quantity per Reel Pb Free Halogen Free R3118Kxx1-TR DFN(PLP)1212-6 5,000 pcs Yes Yes R3118Qxx2-TR-FE SC-88A 3,000 pcs Yes Yes SOT-23-5 3,000 pcs Yes Yes R3118Nxx1-TR-FE xx : The detector threshold can be designated in the range from 0.6 V (06) to 5.0 V (50) in 0.1 V step. : Designation of Output Type (A) Nch Open Drain (C) CMOS BLOCK DIAGRAMS SENSE SENSE VDD VDD DOUT Delay Delay DOUT Circuit C ircuit VREF Vref GND GND CD CD R3118xxxxA (Nch. Open Drain Output) R3118xxxxC (CMOS Output) Block Diagram Block Diagram 2