R3112x SERIES LOW VOLTAGE DETECTOR WITH OUTPUT DELAY OUTLINE FEATURES APPLICATIONS BLOCK DIAGRAMS NO. EA

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1 SERIES LOW VOLTAGE DETECTOR WITH PUT DELAY NO. EA LINE The R32 Series are CMOS-based voltage detector ICs with high detector threshold accuracy 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 these ICs consists of a voltage reference unit, a comparator, resistor net for detector threshold setting, an output driver, a hysteresis circuit, and an output delay circuit. The detector threshold is fixed with high accuracy internally and does not require any adjustment. Two output types, Nch open drain type and CMOS type are available. Three types of packages, SOT-23-5, small SC-82AB, and ultra-small SON62-6 can be selected so that high density mounting on boards is possible. FEATURES Built-in Output Delay Circuit... Typ. ms with an external capacitor:.22 F Ultra-low Supply Current... Typ.. A ( 3.5V) Wide Range of Operating Voltage....7~6.V(Topt 25 C) Detector Threshold... Stepwise setting with a step of.v in the range of.9v to 5.V is possible. High Accuracy Detector Threshold... 2.% Low Temperature-Drift Coefficient of Detector Threshold...Typ. ppm/ C Two Output Types... Nch Open Drain and CMOS Three Types of Packages... SOT-23-5(Mini-mold),SC-82AB, SON62-6 APPLICATIONS CPU and Logic Circuit Reset Battery Checker Window Comparator Wave Shaping Circuit Battery Back-up Circuit Power Failure Detector BLOCK DIAGRAMS R32xxxA R32xxxC RD RD Vref + - Vref + - CD CD

2 OPERATION Ra - Comparator RD Schmitt Trigger Pch Current Source Vref Rb Rc + Tr. Tr.2 Nch Output Capacitor CD Fig. Block Diagram with an external capacitor Released Voltage Detector Threshold +VDET -VDET A HYSTERESIS RANGE B Operation Status Compartor(-) Pin Input Voltage I 2 II 3 II II 5 I Supply Voltage() Compartor Output L H Indefinite H L Minimum Operating Voltge L Tr., 2 Nch Output Tr. Pch OFF OFF ON ON Indefinite ON Indefinite OFF Indefinite ON ON OFF OFF OFF ON Output Voltage() Delay Time Fig. 2 Operation Diagram I Rb+Rc Ra+Rb+Rc II Rb Ra+Rb. Output voltage is equal to supply voltage. (As for Nch open drain type, equal to pull-up voltage.) 2. When the supply voltage is down to the detector threshold voltage level(point A), Vref (Rb Rc)/(Ra Rb Rc) is true, then output of the comparator is reversed from L to H, therefore output voltage becomes level. 3. When the supply voltage is lower than minimum operating voltage, the operation of output transistor is indefinite. In the case of Nch open drain type, output voltage is equal to pull-up voltage.. Output Voltage becomes level. 5. When the supply voltage is higher than released voltage (Point B), Vref Rb/(Ra Rb) is true, then output of the comparator reaches the threshold level, and Output of Shmitt Trigger is reversed from H to L, then output voltage is equal to supply voltage. (As for Nch open drain type, equal to pull-up voltage.) ) The difference between released voltage and detector threshold voltage means hysteresis range voltage. 2

3 Operation of Output Delay Supply Voltage Released Voltage (+VDET) Capacitor Voltage CD Pin Threshold Voltage (VTCD) Output Voltage Output Delay Time(tD) When the supply voltage which is higher than released voltage is forced to pin, charge to an external capacitor starts, then capacitor voltage increases. Until the capacitor voltage reaches to CD Pin threshold voltage, output voltage maintains L. When the capacitor voltage becomes higher than CD pin threshold voltage, output voltage is reversed from "L to "H". Where, the time interval between the rising edge of supply voltage and output voltage reverse point means output delay time. Output Delay Time Output Delay Time (td) can be calculated with the next formula. td.69 RD CD(s) RD is internal resistor and set at 6.5M (Typ.) typically. CD(F) describes the capacitance value of an external capacitor. Therefore, td CD(s) 3

4 SELECTION GUIDE The package type, the detector threshold, the output type, and the taping type of R32 Series can be designated at the users request by specifying the part number as follows; R32xxxx-xx Code a b c d a b c d Part Number Contents Designation of Package Type; Q:SC-82AB N:SOT-23-5 D:SON62-6 Setting Detector Threshold ( VDET); Stepwise setting with a step of.v in the range of.9v to 5.V is possible. Designation of Output Type; A: Nch Open Drain C: CMOS Designation of Packing or Taping Type ; Ex. SOT-23-5, SC-82AB, SON62-6: TR is prescribed as standard directions. (Refer to Taping Specifications) PIN CONFIGURATION SOT-23-5 SC82-AB SON (mark side) (mark side)

5 PIN DESCRIPTION SOT-23-5 SC-82AB Pin No. Symbol Description Output Pin(Output L at detector threshold, Output H at released voltage) 2 Voltage Supply Pin 3 Ground Pin NC No Connection 5 CD Pin for External Capacitor (for setting output delay) Pin No. Symbol Description SON62-6 Voltage Supply Pin 2 Ground Pin 3 CD Pin for External Capacitor (for setting output delay) Output Pin(Output L at detector threshold, Output H at released voltage) Pin No. Symbol Description Output Pin(Output L at detector threshold, Output H at released voltage) 2 Ground Pin 3 CD Pin for External Capacitor (for setting output delay) NC No Connection 5 Ground Pin 6 Voltage Supply Pin 5

6 ABSOLUTE MAXIMUM RATINGS Symbol Item Rating Unit Supply Voltage 6.5 V V Output Voltage (CMOS) VSS.3.3 V V2 Output Voltage (Nch) VSS V I Output Current 2 ma PD Power Dissipation (SOT23-5) 25 Power Dissipation (SC82-AB) 5 Power Dissipation (SON62-6) 5 Topt Operating Temperature Range 85 C Tstg Storage Temperature Range C Tsolder Lead temperature (Soldering) 26 C, s Note : This specification is at mounted on board. PD depends on conditions of mounting on board. This specification is based on the measurement at the condition below: Measurement Conditions Environment: Mounted on board (Wind velocity m/s) Board Material: FR- (2-layer) Board dimensions : mm mm t.6mm Copper Area : 5% mw ABSOLUTE MAXIMUM RATINGS Absolute Maximum ratings are threshold limit values that must not be exceeded ever for an instant under any conditions. Moreover, such values for any two items must not be reached simultaneously. Operation above these absolute maximum ratings may cause degradation or permanent damage to the device. These are stress ratings only and do not necessarily imply functional operation below these limits. 6

7 ELECTRICAL CHARACTERISTICS R32x9A/C Topt 25 C Symbol Item Conditions Min. Typ. Max. Unit VDET Detector Threshold V VHYS Detector Threshold Hysteresis V ISS Supply Current.8V V.5 2. H Maximum Operating Voltage 6. V Topt 25 C.7 L Minimum Operating Voltage Note C Topt 85 C.8 I Output Current (Driver Output Pin) Nch VDS.5V,.7V VDS.5V,.85V Pch VDS 2.V,.5V A V 2 A.5.9 ma. 3.5 ma VTCD CD pin Threshold Voltage.99V V ICD CD pin Output Current VDS.V,.7V 2 7 VDS.5V,.85V RD Output Delay Resistance M VDET/ T Detector Threshold Temperature Coefficient C Topt 85 C A ppm/ C 7

8 R32x27A/C Topt 25 C Symbol Item Conditions Min. Typ. Max. Unit VDET Detector Threshold V VHYS Detector Threshold Hysteresis.8.89 V ISS Supply Current 2.6V V H Maximum Operating Voltage 6. V Topt 25 C.7 L Minimum Operating Voltage Note C Topt 85 C.8 I Output Current (Driver Output Pin) Nch VDS.5V,.7V A V 2 A VDS.5V,.5V. 3. ma Pch VDS 2.V,.5V. 3.5 ma VTCD CD pin Threshold Voltage 2.97V V ICD CD pin Output Current VDS.V,.7V 2 7 A VDS.5V,.5V 2 5 RD Output Delay Resistance M VDET/ T Detector Threshold Temperature Coefficient C Topt 85 C ppm/ C 8

9 R32x5A/C Topt 25 C Symbol Item Conditions Min. Typ. Max. Unit VDET Detector Threshold V VHYS Detector Threshold Hysteresis V ISS Supply Current.9V V H Maximum Operating Voltage 6. V Topt 25 C.7 L Minimum Operating Voltage Note C Topt 85 C.8 I Output Current (Driver Output Pin) Nch VDS.5V,.7V A V 2 A VDS.5V,.5V. 3. ma Pch VDS 2.V, 6.V.5.5 ma VTCD CD pin Threshold Voltage 5.5V V ICD CD pin Output Current VDS.V,.7V 2 7 VDS.5V,.5V 2 5 RD Output Delay Resistance M VDET/ T Detector Threshold Temperature Coefficient C Topt 85 C Note: Minimum Operating Voltage means the value of input voltage when output voltage maintains.v or less. (In the case of Nch Open Drain Type, Output pin is pulled up with a resistance of 7k to 5.V.) A ppm/ C 9

10 ELECTRICAL CHARACTERISTICS BY DETECTOR THRESHOLD Detector Threshold Hysteresis Range Supply Current Supply Current 2 Output Current Output Current 2 Product Code VDET[V] VHYS[V] ISS[ A] ISS2[ A] I[mA] I2[mA] Typ. Max. Typ. Max. Min. Typ. Max. Min. Typ. Max. Conditions Conditions Conditions Min. Typ. Conditions Min. Typ. R32x9A/C R32xA/C R32xA/C R32x2A/C R32x3A/C R32xA/C R32x5A/C R32x6A/C R32x7A/C R32x8A/C R32x9A/C R32x2A/C R32x2A/C R32x22A/C R32x23A/C R32x2A/C R32x25A/C R32x26A/C R32x27A/C R32x28A/C VDET R32x29A/C V R32x3A/C R32x3A/C R32x32A/C R32x33A/C R32x3A/C R32x35A/C R32x36A/C R32x37A/C R32x38A/C R32x39A/C R32xA/C R32xA/C R32x2A/C R32x3A/C R32xA/C R32x5A/C R32x6A/C R32x7A/C R32x8A/C R32x9A/C R32x5A/C VDET.V VDS.5V.7V..2 Nch VDS.5V.85V VDS.5V.5V

11 Output Current 3 Minimum Operating Voltage CD pin Threshold Voltage CD pin Output Current CD pin Output Current 2 Resistance for Output Delay Detector Threshold Temperature I3[mA] L[V] VTCD[V] ICD[ A] ICD2[ A] RD[M ] Condition Min. Typ. Condition Pch VDS 2V.5V VDS 2.V 6.V Topt 25 C.7 Condition Max. C Topt 85 C Max. Condition.8 (VDET).V Min. Typ. Max. Condition VDS.V.7V Condition Min. Typ. 2 7 VDS.5V.85V VDS.5V.85V VDS.5V.5V VDET/ Topt [ppm/ C] Min. Typ. Min. Typ. Max. Condition Typ C Topt 85 C

12 TEST CIRCUITS Pull-up circuit is not necessary for CMOS Output type, or R32xxxxC. ISS +5V or VIN R32x VIN R32x 7kΩ Supply Current Test Circuit Detector Threshold Test Circuit VIN R32x I VDS VIN R32x I +VDS Nch Driver Output Current Test Circuit Pch Driver Output Current Test Circuit Apply only to CMOS +5V or VIN VDS CD R32x 7kΩ VIN VDS ICD CD R32x CD Pin Threshold Test Circuit CD Pin Output Current Test Circuit +VDET+2. or.6v Input Voltage Output Voltage.7V % 5% VIN CD CD R32x +5V 7kΩ Output Delay Time Test Circuit 2

13 TYPICAL CHARACTERISTICS ) Supply Current vs. Input Voltage.5 R32x9x.5 R32x3x Supply Current Iss(µA) Topt= - C Supply Current Iss(µA) Topt= - C R32x27x 2. R32x5x Supply Current Iss(µA) Topt= - C Supply Current Iss(µA) Topt= - C ) Detector Threshold vs. Temperature Detector Threshold/Released Voltage VDET(V) R32x9x +VDET -VDET Temperature Topt( C) Detector Threshold/Released Voltage VDET(V) R32x3x +VDET -VDET Temperature Topt( C) 3

14 Detector Threshold/Released Voltage VDET(V) R32x27x +VDET -VDET Temperature Topt( C) Detector Threshold/Released Voltage VDET(V) R32x5x +VDET -VDET Temperature Topt( C) 3) Output Voltage vs. Input Voltage. R32x9x Nch Output Type: pull up 6. R32x9A 5V pull up via 7kΩ Output Voltage V(V) Topt=- C Output Voltage V(V) Topt=- C Output Voltage V(V) R32x3x Nch Output Type: pull up Topt=- C Output Voltage V(V) R32x3A 5V pull up via 7kΩ Topt=- C

15 Output Voltage V(V) Output Voltage V(V) R32x27x Nch Output Type: pull up.5..5 Topt=- C R32x5x Nch Output Type: pull up.5 Topt=- C Output Voltage V(V) Output Voltage V(V) R32x27A 6. 5V pull up via 7kΩ Topt=- C R32x5A 6. 5V pull up via 7kΩ Topt=- C ) Nch Driver Output Current vs. VDS.2 R32x9x Topt= 2.5 R32x3x Topt= =.85V.7V =.V.85V.7V VDS(V) VDS(V) 5

16 R32x27x.V Topt= =2.5V 2.V.5V R32x5x =.V =3.5V.V.5V 2.V Topt= =3.V =2.5V VDS(V) VDS(V) 5) Nch Driver Output Current vs. Input Voltage 2. R32x9x 5 R32x3x.5. Topt=.5 - C Topt=- C R32x27x Topt=- C R32x5x Topt=- C

17 6) Pch Driver Output Current vs. Input Voltage 6 R32x9C Topt= 6 R32x3C Topt= 5 VDS=-2.V 3 -.5V 2 -.V -.5V VDS=-2.V 3 -.5V 2 -.V -.5V R32x27C Topt= 6 R32x5C Topt= 5 VDS=-2.V 3 -.5V 2 -.V -.5V VDS=-2.V 3 -.5V 2 -.V -.5V ) CD Pin Threshold Voltage vs. Temperature CD Pin Threshold Voltage VTCD(V) R32x9x.8 =.99V CD Pin Threshold Voltage VTCD(V) R32x3x. =.3V Temperature Topt( C) Temperature Topt( C) 7

18 CD Pin Threshold Voltage VTCD(V) R32x27x.9 =2.97V CD Pin Threshold Voltage VTCD(V) R32x5x 2.9 =.95V Temperature Topt( C) Temperature Topt( C) 8) CD Pin Output Current vs. Input Voltage CD Pin Output Current ICD(mA) CD Pin Output Current ICD(mA) R32x9x VDS=.5V Topt=- C R32x27x VDS=.5V Topt=- C CD Pin Output Current ICD(mA) CD Pin Output Current ICD(mA) R32x3x VDS=.5V Topt=- C R32x5x VDS=.5V Topt=- C

19 9) CD Pin Output Current vs. VDS (Topt 25 C) R32x9x Topt=.7 CD Pin Output Current ICD(mA) CD Pin Output Current ICD(mA).6 =.85V V VDS(V) R32x27x Topt= 3. =2.5V V.5.5V..V VDS(V) CD Pin Output Current ICD(mA) CD Pin Output Current ICD(mA) R32x3x Topt= =.V.85V V VDS(V) R32x5x.5 Topt=. =.V V.5V VDS(V) 2.V 3.5V 2.5V 3.V ) Output Delay Time vs. External Capacitance (Topt 25 C) R32x9x Topt= R32x3x Topt= Output Deley Time tx(ms). td tphl Output Delay tx(ms). td tphl..... External Capacitance CD(µF)..... External Capacitance CD(µF) 9

20 R32x27x Topt= R32x5x Topt= Output Delay Time tx(ms). td tphl Output Delay Time tx(ms). td tphl..... External Capacitance CD(µF)..... External Capacitance CD(µF) ) Delay Circuit Resistance vs. Temperature Delay Circuit Resistance RD(MΩ) R32xxxx Temperature Topt( C) 2

21 TECHNICAL NOTES R R R R2 R32x R2 R32x R32x Figure A Figure B Figure C When R32xxxA (Nch open drain output type) is used in Figure A or Figure B, if impedance of voltage supply pin, and of this IC is large, detector threshold level would shift by voltage dropdown caused by the consumption current of the IC itself. Released voltage may also shift and delay time for start-up might be generated by this usage. When R32xxxC (CMOS output type) is used in Figure A or Figure B, Output level could be unstable by cross conduction current which is generated at detector threshold level or at released voltage level, therefore, do not use R32xxxC with the connection in Figure A or Figure B. The connection in Figure C may cause the oscillation in both R32xxxC (CMOS Output) and R32xxxA (Nch Open Drain Output), therefore do not use R32xxxx Series with the connection in Figure C. 2

0.8% LOW VOLTAGE DETECTOR WITH OUTPUT DELAY

0.8% LOW VOLTAGE DETECTOR WITH OUTPUT DELAY SERIES.8% LOW VOLTAGE DETECTOR WITH PUT DELAY NO.EA-161-834 LINE The R3116x series are CMOS-based voltage detector ICs with high detector threshold accuracy and ultra-low supply current, which can be operated