System Reset IC with delay Monolithic IC PST89XA Series
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- Verity Holland
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1 System Reset IC with delay Monolithic IC 89XA Series Outline This IC is a reset IC for turning on/off power supply and power flicker in CPU or logic systems. This IC can change delay time by an external capacitor. Features 1. Maximum supply voltage 7V 2. Detecting voltage accuracy ±1.0% 3. Low supply current 0.35µA typ. 4. Operating supply voltage 0.95 to 6.5V 5. Operating temperature -40 to +105 C 6. Reset voltage rank 1.2 to 5.2V (0.1Vstep) 7. Reset temperature coefficient ±100ppm/ C typ. 8. Delay Resistance 10M type. 9. Output type Open drain, CMOS Packages SC-82ABB SOT-25A PLP-4A Applications 1. The reset of CPU and MPU and logic circuit 2. Battery voltage check 3. Back-up circuit 4. Level detector
2 Block Diagram 893Axxx Series (Delay Resistance 10M type, CMOS Output) RD Vref : Protection Circuit 894Axxx Series (Delay Resistance 10M type, Open Drain Output) RD Vref : Protection Circuit
3 Pin Assignment SC-82ABB (TOP VIEW) SOT-25A (TOP VIEW) NC Heat Spreader Bottom Note PLP-4A (TOP VIEW) Note1 : Heat Spreader Bottom with. Pin Description SC-82ABB Pin No. Pin name Functions 1 Pin 2 Pin / Voltage Detect Pin 3 Capacitor Connect Pin with Delay 4 Reset Signal Output Pin SOT-25A Pin No. Pin name Functions 1 Reset Signal Output Pin 2 Pin / Voltage Detect Pin 3 Pin 4 NC No Connection 5 Capacitor Connect Pin with Delay PLP-4A Pin No. Pin name Functions 1 Pin 2 Reset Signal Output Pin 3 Capacitor Connect Pin with Delay 4 Pin / Voltage Detect Pin
4 Absolute Maximum Ratings (Except where noted otherwise Ta=25 C) Item Symbol Ratings Units Supply Voltage max ~+7.0 V Output Voltage Note2 : With PC board of glass epoxy. 893 Series 894 Series ~ max (CMOS Type) ~ +7.0 (N-ch Open Drain Type) Input Current () IDD 20 ma Output current (RESET, RESET) I 20 ma Pin Input Voltage V ~ V Power dissipation Pd 150 (SC-82AB, SOT-25A) mw 400 (PLP-4A) (Note2) mw Operating temperature Topr - 40~+105 C Storage temperature Tstg - 65~+150 C V Recommended Operating Conditions Item Symbol Ratings Units Operating Temperature Topr - 40~+105 C Supply Voltage 0.95~6.5 V Model Name P S T 8 9 A a b c d e a b c d e Output Type pin charge Type Detecting Voltage Rank Package Packing Specifications 3 CMOS Output A delay Resistance VTH=1.20V U SC-82ABB R R HOUSING Halogen-contained Product 4 Open drain Output ~ ~ N SOT-25A L L HOUSING Halogen-contained Product 520 VTH=5.20V R PLP-4A M R HOUSING Halogen-free Product H L HOUSING Halogen-free Product
5 Electrical Characteristics (Except where noted otherwise Ta=25 C) Item Symbol Measurement conditions Rank Min. Typ. Max. Units Circuit Reset threshold VTH Ta=+25 C Ta= 40~+85 C V Note3 : This device is tested at Ta=25 C, over temperature limits guaranteed by desigh only. Note4 : The parameter is guaranteed by design.
6 Item Symbol Measurement conditions Rank Min. Typ. Max. Units Circuit Reset threshold VTH Ta=+25 C Ta= 40~+85 C V Note3 : This device is tested at Ta=25 C, over temperature limits guaranteed by desigh only. Note4 : The parameter is guaranteed by design.
7 Item Symbol Measurement conditions Rank Min. Typ. Max. Units Circuit Reset threshold VTH =0V VTH+1V 0V hysteresis V Note3 : This device is tested at Ta=25 C, over temperature limits guaranteed by desigh only. Note4 : The parameter is guaranteed by design.
8 Item Symbol Measurement conditions Rank Min. Typ. Max. Units Circuit Supply Current IDD =VTH+1V Reset threshold temp. coefficient VTH/ C Ta=-40~+85 C L transfer delay time (Note4) H transfer delay time (Note4) "L" Output Current tphl tplh IOL1 IOL2 IOL3 IOL4 =VTH+0.3V VTH-0.3V =VTH+0.4V VTH-0.4V =VTH-0.3V VTH+0.3V =VTH-0.4V VTH+0.4V =0.95V, VDS=0.05V =1.2V, VDS=0.5V VTH 1.3V =2.4V, VDS=0.5V VTH 2.5V =3.6V, VDS=0.5V VTH 3.7V ~ ~ µa 1 ±100 ppm/ C µs µs 4 ma 3 "H" Output Current IOH1 =4.8V, VDS=0.5V VTH 4.7V 893 series only ~ ma 4 IOH2 =6.1V, VDS=0.5V 893 series only Output Leakage Current Ileak =6.5V, =6.5V 894 series only 0.1 µa 3 Pin Resistance RD 89XA series M 5 Pin Threshold Voltage VT =VTH 1.1V V 4 Pin Output Current1 I1 =0.95V VDS=0.1V µa 5 Pin Output Current2 I2 =1.0V VDS=0.5V =1.5V VDS=0.5V ~ µa 5 Note3 : This device is tested at Ta=25 C, over temperature limits guaranteed by desigh only. Note4 : The parameter is guaranteed by design.
9 Test Circuit (1) (2) Iss 470k (3) (4) 470k I VDS VDS (5) I I VDS VDS (6) 470k Input Voltage VTH Output Voltage 100% 50% tphl tplh VTH=1.2V, 1.3V VTH=1.4V~5.2V Input Voltage VTH 0.3V ~ VTH+0.3V Input Voltage VTH 0.4V ~ VTH+0.4V
10 Timing Chart Supply Voltage Release voltage (VTH+ VTH) Capacitor Voltage Pin Thereshold voltage (VT) Output Voltage Delay Time(tD) Delay Time(tD) 89XA Series (10M ) td 0.69 RD (F) (s) RD : : Pin Resistance Capacitor V VTH VTH VTH+ VTH V t tplh tphl t
11 Application Circuits RESET Logic System 894 Series only We shall not be liable for any trouble or damage caused by using this circuit. In the event a problem which may affect industrial property or any other rights of us or a third party is encountered during the use of information described in these circuit, Mitsumi Electric Co., Ltd. shall not be liable for any such problem, nor grant a license therefore. Please note that there is any possibility of circuit oscillation when resistance put in the line. In 89xx, please make it less than 15k ohm. Heat Spreader Bottom (The electrode of the bottom central part) with pin. Heat Spreader Bottom PLP-4A (TOP VIEW)
12 Characteristics (2.8V) (Except where noted otherwise Ta=25 C) Detecting Voltage Supply Current Output Voltage (V) Supply Current (µa) Input Voltage (V) Input Voltage (V) Detecting Voltage - Temperature Hysteresis Voltage - Temperature Detecting Voltage (V) Hysteresis Voltage (mv) "L"Output Current 1 - Temperature 0.50 "L"Output Current 2 - Temperature 5.0 "L"Output Current 1 (ma) "L"Output Current 2 (ma) Note : These are typical characteristics.
13 "L"Output Current 3 - Temperature Pin Resistance - Temperature "L"Output Current 3 (ma) Pin Resistance (M ) Pin Threshold Voltage - Temperature Pin Threshold Voltage (V) Pin Output Current Pin Output Current (ma) VDS=0.5V Input Voltage (V) Pin Output Current 1 - Temperature Pin Output Current 2 - Temperature Pin Output Current 1 (µa) Pin Output Current 2 (ma) Note : These are typical characteristics.
14 N-ch Output Current N-ch Output Current N-ch Output Current (ma) =2.4V =1.2V 4 =0.95V VDS (V) N-ch Output Current (ma) =2.4V =1.2V =0.95V VDS (V) Note : These are typical characteristics.
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