NJU7295 SYSTEM RESET IC WITH DELAY CIRCUIT ■ GENERAL DESCRIPTION The NJU7295 is a system reset IC with built-in delay circuit that monitors the status of a power line, and outputs a reset signal to the microcomputer. The NJU7295 outputs a reset signal when exceeds the detection voltage. Therefore it is possible to control the microcomputer by detecting a rising edge of a power line. Delay times are fixed internally and those are set in each of rising and falling. It is possible to monitor multiplex power line by combination of NJU7295 because output voltage VOUT is kept High level when EXT Pin is Low level by connecting with other NJU7295. Detection voltage’s default value is 1.0V. It can be adjusted to desired voltage by the resistor divider. In addition, a hysteresis voltage can be set arbitrarily by inserting a resistor between the VIN pin and the HYS pin. ■ FEATURES ● High Precision Detection Voltage ● Detection Voltage ● Reset Output Logic ● Delay Circuit (Internal Fixed type) ● Ultra Low Quiescent Current ● Supply Voltage Range ● External Input Pin ● Adjustable Hysteresis Voltage ● Output Type ● Package ■ PACKAGE OUTLINE NJU7295F1 1.0% (Ta=25 C) 1.0V (default) and adjustable with external resistor Reset Low output when VIN pin is detection voltage or more *If required reset low output when VIN pin is detection voltage or below, see the NJU7296. Rising / Falling independent setting 1.7µA typ. 1.5 to 5.5V While inputting low signal, keep output High level CMOS output SOT-23-6-1 ■ PIN CONFIGURATION VIN 1 VSS 2 EXT 3 Ver.2015-11-11 6 HYS 5 VOUT 4 VDD Pin Function 1. VIN ：Input Voltage Pin 2. VSS ：Ground Pin 3. EXT ：External Input Pin 4. VDD ：Supply Voltage Pin 5. VOUT ：Output Pin 6. HYS ：External Resistor Pin for setting Hysteresis Voltage -1- NJU7295 ■ BLOCK DIAGRAM VDD HYS VIN Delay Circuit VSS EXT ■ PRODUCT CLASSFICATION Version Delay Time1(Typ.) Delay Time2(Typ.) Device Name NJU7295F1-A A 10ms 1.25ms NJU7295F1-A-T NJU7295F1-B B 20ms 10ms NJU7295F1-B-T NJU7295F1-C C 10ms 10ms NJU7295F1-C-T NJU7295F1-D D 10ms 30µs NJU7295F1-D-T ■ ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Supply Voltage VDD Input Voltage VIN Output Voltage VOUT HYS Pin Voltage VHYS EXT Pin Input Voltage VEXT Output Current IOUT HYS Pin Current IHYS Power Dissipation Surge Current Operating Temperature Storage Temperature PD IIN_SRG Topr Tstg VOUT -40 -40 -40 -40 RATINGS +7 VSS-0.3 to +7 VSS-0.3 to VDD+0.3 VSS-0.3 to VDD+0.3 VSS-0.3 to VDD+0.3 50 10 410(*1) SOT-23-6-1 580(*2) ±2.5(*3) -40 to +105 -40 to +125 Spec Guarantee (General Spec.) 25 C C to +105 C (T Spec.) (General Spec.) 25 C C to +105 C (T Spec.) (General Spec.) 25 C C to +105 C (T Spec.) (General Spec.) 25 C C to +105 C (T Spec.) (Ta=25 C) UNIT V V V V V mA mA mW mA C C (*1): Mounted on glass epoxy board. (76.2 114.3 1.6mm: based on EIA/JDEC standard, 2Layers) (*2): Mounted on glass epoxy board. (76.2 114.3 1.6mm:based on EIA/JDEC standard, 4Layers), internal Cu area: 74.2 74.2mm (*3): Permissible current range there is no logical error in VOUT and no destruction -2- Ver.2015-11-11 NJU7295 ■ ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL Detection Voltage VDET Quiescent Current ISS Output Current IOUT HYS Pin Current IHYS Average Temperature Coefficient of Detection Voltage EXT Pin High Level Voltage EXT Pin Low Level Voltage VDET/ Ta VEXT_H VEXT_L VIN Pin Resistance RIN EXT Pin Resistance REXT Operating Voltage VOPL Unless otherwise noted, VDD=3.3V, Ta=25 C TEST CONDITION MIN. TYP. MAX. UNIT -1.0% 1.0 +1.0% V -2.5% +2.5% ‐ Ta=-40 C to 105 C No Signal 1.7 3.0 µA 3.5 No Signal ,Ta=-40 C to 105 C Nch, VDS=0.5V 12 15 10 Nch, VDS=0.5V, Ta=-40 C to 105 C mA Pch, VDS=0.5V 7.5 11 6.0 Pch, VDS=0.5V, Ta=-40 C to 105 C Nch, VDS=0.5V 7.5 12 6.0 Nch, VDS=0.5V, Ta=-40 C to 105 C mA Pch, VDS=0.5V 5.0 9.0 4.0 Pch, VDS=0.5V, Ta=-40 C to105 C Ta=0 C to +85 C Ta=-40 C to 105 C Ta=-40 C to 105 C Ta=-40 C to 105 C Ta=-40 C to 105 C Ta=-40 C to 105 C - 100 - 0.67 VDD 0.7 VDD 10 8 0.5 0.4 1.5 1.5 20 1.0 - VDD VDD 0.33 VDD 0.3 VDD 5.5 5.5 ppm/ C V V MΩ MΩ V ■ ELECTRICAL CHARACTERISTICS (Defined by each versions) PARAMETER SYMBOL Delay Time 1 td1 VIN=L H Delay Time 2 td2 VIN=H L Ver.2015-11-11 Unless otherwise noted, VDD=3.3V, Ta=25 C TEST CONDITION MIN. TYP. MAX. UNIT NJU7295F1-A 7 10 14 ms 6 14 NJU7295F1-A-T, Ta=-40 C to 105 C NJU7295F1-B 16 20 24 ms 15 25 NJU7295F1-B-T, Ta=-40 C to 105 C NJU7295F1-C 7 10 14 ms 6 14 NJU7295F1-C-T, Ta=-40 C to 105 C NJU7295F1-D 7 10 14 ms 6 14 NJU7295F1-D-T, Ta=-40 C to 105 C NJU7295F1-A 1.05 1.25 1.43 ms 1.0 1.5 NJU7295F1-A-T, Ta=-40 C to 105 C NJU7295F1-B 7 10 14 ms 6 14 NJU7295F1-B-T, Ta=-40 C to 105 C NJU7295F1-C 7 10 14 ms 6 14 NJU7295F1-C-T, Ta=-40 C to 105 C NJU7295F1-D 30 100 µs 120 NJU7295F1-D-T, Ta=-40 C to 105 C -3- NJU7295 ■ TEST CIRCUIT ● Quiescent Current ● Detection Voltage A HYS V DD NJU7295 HYS V OUT R1 R3 EXT V IN V IN V SS V ● Output Current HYS V DD NJU7295 V OUT A A ● EXT Pin Input Voltage V OUT EXT V V SS V DD NJU7295 V OUT EXT V SS ● Delay Time V DD NJU7295 V OUT EXT V IN HYS V IN V SS HYS NJU7295 ● HYS Pin Current EXT V IN R2 V DD V V SS ● Minimum Operating Voltage HYS R1 R3 V IN R2 -4- V DD NJU7295 V OUT EXT V SS V RL Ver.2015-11-11 NJU7295 ■ FUNCTION DESCRIPTION (1) Basic Operation Input Voltage (VIN) Detection Voltage Release Voltage * (VDET) *In case of not setting the hysteresis voltage. VSS Output Voltage (VOUT) (2) In the state of VIN is above the release voltage VDET, the reset state is maintained. The default release voltage VDET is same as detection voltage VDET, although can be set the hysteresis by inserting a resistor between the VIN pin and the HYS pin. (3) When VIN falls and it reaches release voltage VDET, after the delay time which is fixed for each version, VOUT is switched from Low level to High level. VSS Ver.2015-11-11 (1) When input voltage VIN is increased and exceed the detection voltage VDET, after the delay time which is fixed for each version, the output voltage VOUT is switched from High level to Low level. Delay Time1 Delay Time2 (td1) (td2) -5- NJU7295 ■ TYPICAL APPLICATION R1, R2: Adjust the detection voltage by resistor divider R3: Setting the hysteresis voltage CIN: To prevent malfunction due to noise (Recommend about 10pF to 1000pF) EXT: The input logic signals from other power line ● Adjusting of Detection Voltage The Detection voltage of NJU7295 is fixed as 1.0V (typ.) internally, although it can be adjusted to a desired Detection Voltage by connecting external resistor (R1,R2) to a VIN pin. When adjusting to a desired Detection Voltage, it's necessary to consider VIN pin resistance RIN. (20 MΩ typ.) ● Setting of Hysteresis Voltage The NJU7295 doesn't have the Hysteresis Voltage between the Release Voltage and Detecting Voltage in default. It's able to set the Hysteresis Voltage optionally by connecting dividing resistor between the VIN-HYS pin. Detection Voltage Hysteresis Voltage = VDET R1( R 2 RIN ) VDET RIN R 2 R1 VDET R3 R1 VDD R3 Release Voltage = Detection Voltage - Hysteresis Voltage ● External input Pin If inputs the logic signal from other power line(e.g. other NJU7295) into the EXT pin, it can be kept the status of the output "High level" and ignoring the status of detection voltage VDET. When inputs a low level signal into the EXT pin, VOUT is kept high level. It is useful for priority setting of reset signal when monitoring multiplex power supply systems. If do not use the External input, the EXT pin should be connected to VDD or Open. -6- Ver.2015-11-11 NJU7295 ■ TYPICAL CHARACTERISTICS NJU7295 Detection Voltage vs Temperature 1.1 Detection Voltage :VDET [V] @VDD=3.3V 1.05 1 0.95 0.9 -50 -25 0 25 50 75 Temperature [ºC] 100 NJU7295 NJU7295 Quiescent Current vs Supply Voltage 3 Queiscent Current vs Temperature 3 2.5 Quiescent Current :ISS [μA] Quiescent Current :ISS [μA] @Ta=25 C No Signal 2 1.5 1 0.5 @VDD=3.3V No Signal 2.5 2 1.5 1 0.5 0 0 1.5 2 30 2.5 3 3.5 4 4.5 Supply Voltage :VDD [V] 5 5.5 -50 -25 0 25 50 75 Temperature [ºC] 100 NJU7295 NJU7295 VIN Pin Resistance vs Temperature EXT Pin Resistance vs Temperature 2 125 1.8 EXT Pin Resistance REXT [MΩ] 28 VIN Pin Resistance :RIN [MΩ] 125 26 24 22 20 18 16 14 12 10 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 -50 Ver.2015-11-11 -25 0 25 50 75 Temperature [ºC] 100 125 -50 -25 0 25 50 75 Temperature [ºC] 100 125 -7- NJU7295 NJU7295-A/C/D Delay Time 1 vs Temperature 14 @Ta=25 C VIN=L H @:VDD=3.3V VIN=L H 13 12 Delay Time1 :td1 [ms] Delay Time1 :td1 [ms] 13 NJU7295-A/C/D Delay Time1 vs Supply Voltage 14 11 10 9 8 12 11 10 9 8 7 7 6 6 1.5 2 2.5 3 3.5 4 4.5 Supply Voltage :VDD [V] 5 5.5 -50 -25 0 25 50 75 Temperature [ºC] @:VDD=3.3V VIN=L H 24 23 23 Delay Time1 :td1 [mS] Delay time1 :td1 [mS] Delay time1 vs Temperature 25 @Ta=25 C VIN=L H 24 22 21 20 19 18 22 21 20 19 18 17 17 16 16 15 15 1.5 2 2.5 3 3.5 4 4.5 Supply Voltage :VDD [V] 1.5 5 5.5 -50 0 25 50 75 Temperature [ºC] NJU7295-A NJU7295-A Delay Time2 vs Temperature 1.5 100 125 100 125 @:VDD=3.3V VIN=H L Delay Time2 :td2 [mS] 1.4 Delay time2 :td2 [mS] -25 Delay Time2 vs Supply Voltage @Ta=25 C VIN=H L 1.3 1.2 1.1 1.4 1.3 1.2 1.1 1 1 1.5 -8- 125 NJU7295-B NJU7295-B Delay Time1 vs Supply Voltage 25 100 2 2.5 3 3.5 4 4.5 Supply Voltagge :VDD [V] 5 5.5 -50 -25 0 25 50 75 Temperature [ºC] Ver.2015-11-11 NJU7295 14 NJU7295-B/C Delay Time 2 vs Temperature 14 @Ta=25 C VIN=H L 13 @:VDD=3.3V VIN=H L 13 12 Delay Time2 :td2 [ms] Delay Time2 :td2 [ms] NJU7295-B/C Delay Time2 vs Supply Voltage 11 10 9 8 7 12 11 10 9 8 7 6 6 1.5 2 2.5 3 3.5 4 4.5 Supply Voltage :VDD [V] 5 5.5 -50 -25 0 25 50 75 Temperature [ºC] NJU7295-D 125 100 125 @:VDD=3.3V VIN=H L 35 Delay Time2 :td2 [ S] Delay Time2 :td2 [ S] 100 Delay Time2 vs Temperature 40 @Ta=25 C VIN=H L 30 25 20 35 30 25 20 1.5 2 2.5 3 3.5 4 4.5 Supply Voltage :VDD [V] 5 5.5 -50 -25 Nch Output Current vs Temperature 30 0 25 50 75 Temperature [ºC] NJU7295 NJU7295 Pch Output Current vs Temperature 30 @:VDS=0.5V Pch Output Current :IOUT [mA] @:VDS=0.5V Nch Output Current :IOUT [mA] 125 NJU7295-D Delay Time2 vs Supply Voltage 40 100 25 20 15 10 5 0 25 20 15 10 5 0 -50 Ver.2015-11-11 -25 0 25 50 75 Temperature [ºC] 100 125 -50 -25 0 25 50 75 Temperature [ºC] -9- NJU7295 30 NJU7295 NJU7295 Nch HYS Current vs Temperature Pch HYS Current vs Temperature 30 @:VDS=0.5V 25 Pch HYS Current :IHYS [mA] Nch HYS Current :IHYS [mA] @:VDS=0.5V 20 15 10 5 0 25 20 15 10 5 0 -50 -25 0 25 50 75 Temperature [ºC] 100 125 -50 -25 0 25 50 75 Temperature [ºC] 100 125 [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. - 10 - Ver.2015-11-11