MITSUMI IC for CMOS System Reset PST81XX, 82XX Series IC for CMOS System Reset Monolithic IC PST81XX, 82XX Series Outline This IC functions in a variety of CPU systems and other logic systems, to detect supply voltage and reset the system accurately when the power is turned on or interrupted. To 1.5% of detection voltage accuracy of the conventional models, a maximum of 0.5% of super-high precision is realized, and it is more suitable for battery detection etc. Moreover, the mounting area significantly contributes to space saving using the SSON package. Features 1. Ultra-high accuracy VTH 0.5%/2.0~6.0V VTH 0.8%/0.8~1.9V 2. Ultra-low current consumption 0.25A typ. 3. Ultra-small package 1.10 1.40mm (SSON-4A) 4. Operating temperature range -40~+105C 5. Detecting voltage rank 0.8~6.0V (0.1V step) 6. Output configuration PST81XX series ****** CMOS output PST82XX series ****** Open drain output Packages SOT-25A SC-82ABA SC-82ABB SSON-4A Applications 1. Reset circuits for microcomputers, CPUs and MPUs 2. Reset circuits for logic circuits 3. Battery voltage check circuits 4. Back-up power supply switching circuits 5. Level detection circuits IC for CMOS System Reset PST81XX, 82XX Series MITSUMI Block Diagram PST81XXNX, PST81XXRX, PST81XXUX (SOT-25A) (SSON-4A) (SC-82ABA/-82ABB) VDD 2 1 OUT 1 OUT Vref GND 3 PST82XXNX, PST82XXRX, PST82XXUX (SOT-25A) (SSON-4A) (SC-82ABA/-82ABB) VDD 2 Vref GND 3 IC for CMOS System Reset PST81XX, 82XX Series MITSUMI Pin Assignment PST81XX, PST82XX 5 1 4 2 3 OUT VDD GND N.C N.C 1 2 3 4 5 3 1 2 3 1 2 1 2 3 4 OUT GND N.C VDD SSON-4A (TOP VIEW) SOT-25A (TOP VIEW) 4 4 OUT VDD N.C GND 1 2 3 4 SC-82ABA SC-82ABB (TOP VIEW) Pin Description PST81XXNX, PST82XXNX (SOT-25A) Pin No. Pin name 1 OUT 2 VDD 3 Functions PST81XXRX, PST82XXRX (SSON-4A) Pin No. Pin name Reset Signal Output Pin 1 OUT Reset Signal Output Pin VDD Pin / Voltage Detect Pin 2 GND GND Pin GND GND Pin 3 N.C No Connection 4 N.C No Connection 4 VDD VDD Pin / Voltage Detect Pin 5 N.C No Connection PST81XXUX, PST82XXUX (SC-82ABA/-82ABB) Pin No. Pin name Functions 1 OUT Reset Signal Output Pin 2 VDD VDD Pin / Voltage Detect Pin 3 N.C No Connection 4 GND GND Pin Functions IC for CMOS System Reset PST81XX, 82XX Series MITSUMI Absolute Maximum Ratings PST81XX Item Supply voltage Output voltage Input current (VDD) Output current (RESET, RESET) Operating temperature Storage temperature Symbol VDD max OUT IDD IOUT TOPR TSTG Ratings -0.3~+12.0 -0.3~(VDD+0.3) 20 20 -40~+105 -65~+150 Units V V mA mA C C Symbol VDD max OUT IDD IOUT TOPR TSTG Ratings -0.3~+12.0 -0.3~+12.0 20 20 -40~+105 -65~+150 Units V V mA mA C C Ratings -40~+105 +0.7~+10.0 Units C V PST82XX Item Supply voltage Output voltage Input current (VDD) Output current (RESET, RESET) Operating temperature Storage temperature Recommended Operating Conditions Item Operating temperature Supply voltage Symbol TOPR VDD IC for CMOS System Reset PST81XX, 82XX Series MITSUMI Electrical Characteristics (Except where noted otherwise Ta=25C) PST81XX Item Supply current Reset threshold Reset threshold hysteresis Reset threshold temp. coefficient L transfer delay time H transfer delay time Symbol IDD VTH VTH VTH/C tPHL tPLH IOL1 IOL2 "L" output curren IOL3 IOL4 "H" output current IOH1 IOH2 Measurement conditions VDD=VTH+1V Ta=+25C VTH <= 1.9V Ta=-40~+85C (note1) Ta=+25C VTH >= 2.0V Ta=-40~+85C (note1) VDD=0V VTH+1V 0V Ta=-40~+85C (note1) VDD=VTH+0.4V VTH-0.4V (note2) VDD=VTH-0.4V VTH+0.4V (note2) VDD=0.7V, VDS=0.05V VDD=1.2V, VDS=0.5V VTH > 1.3V VDD=2.4V, VDS=0.5V VTH > 2.5V VDD=3.6V, VDS=0.5V VTH > 3.7V VDD=4.8V, VDS=0.5V, VTH < 4.7V VDD=6.1V, VDS=0.5V, VTH < 5.9V Min. VTH-0.8% VTH-2.5% VTHv0.5% VTH-2.5% VTH 0.03 Typ. 0.25 VTH 0.8~ 6.0V (0.1Vstep) 100 0.01 0.10 0.23 2.00 1.60 8.00 3.20 12.0 0.36 0.46 0.62 0.75 Max. Units 1.0 A VTH+0.8% VTH+2.5% V VTH+0.5% VTH+2.5% VTH 0.08 V ppm/C 100 s 100 s Circuit (1) (2) (2) (2) (5) (5) mA (3) mA (4) note1 : This device is tested at Ta=25C, over temperature limits guaranteed by design only. note2 : The parameter is guaranteed by design. PST82XX Item Supply current Symbol IDD Reset threshold VTH Reset threshold hysteresis Reset threshold temp. coefficient L transfer delay time H transfer delay time VTH VTH/C tPHL tPLH IOL1 IOL2 "L" output curren IOL3 IOL4 Output leakage current Ireak Measurement conditions Min. Typ. Max. Units VDD=VTH+1V 0.25 1.0 A Ta=+25C VTH <= 1.9V VTH-0.8% VTH VTH+0.8% Ta=-40~+85C (note1) VTH-2.5% 0.8~ VTH+2.5% V Ta=+25C VTH >= 2.0V VTH-0.5% 6.0V VTH+0.5% Ta=-40~+85C (note1) VTH-2.5% (0.1Vstep) VTH+2.5% VDD=0V VTH+1V 0V VTH 0.03 VTH 0.08 V Ta=-40~+85C (note1) 100 ppm/C VDD=VTH+0.4V VTH-0.4V (note2) 100 s VDD=VTH-0.4V VTH+0.4V (note2) 100 s VDD=0.7V, VDS=0.05V 0.01 0.10 VDD=1.2V, VDS=0.5V 0.23 2.00 VTH > 1.3V VDD=2.4V, VDS=0.5V mA 1.60 8.00 VTH > 2.5V VDD=3.6V, VDS=0.5V 3.20 12.0 VTH > 3.7V VDD=10V, OUT=10V 0.1 A note1 : This device is tested at Ta=25C, over temperature limits guaranteed by design only. note2 : The parameter is guaranteed by design. Circuit (1) (2) (2) (2) (4) (4) (3) (3) IC for CMOS System Reset PST81XX, 82XX Series MITSUMI Measuring Circuit PST81XX * 1 - 3 in the circuit diagram is pin number for the SOT-25A package. (1) IDD (2) VTH, VTH, VTH/C ISS 2 VDD 2 VIN VDD PST 1 81XX VIN PST OUT 1 81XX 3 GND 3 GND (3) IOL1, IOL2, IOL3, IOL4 (4) IOH1, IOH2 VDD 2 2 VDD IOUT VIN IOUT VIN PST PST 1 81XX 81XX 1 OUT OUT 3 3 VDS GND GND VDD-VDS (5) tPLH, tPHL VTH+0.4V 2 VIN PST 81XX Input Voltage VDD VTH VTH+0.4V 1 GND OUT 100% 3 GND Output Voltage 50% GND IC for CMOS System Reset PST81XX, 82XX Series MITSUMI PST81XX * 1 - 3 in the circuit diagram is pin number for the SOT-25A package. (1) IDD (2) VTH, VTH, VTH/C ISS 2 2 VIN VDD 470k VDD VIN PST 1 82XX PST OUT 1 82XX 3 GND 3 GND (3) IOL1, IOL2, IOL3, IOL4, Ireak 2 (4) tPLH, tPHL VDD 2 VDD 470k IOUT VIN PST 82XX VIN 1 82XX OUT 3 VTH VTH+0.4V 100% Output Voltage 50% GND 3 GND VTH+0.4V GND 1 OUT VDS GND Input Voltage PST IC for CMOS System Reset PST81XX, 82XX Series MITSUMI Timing Chart V VTH VTH+ VTH VTH VDD t V tPLH OUT tPHL t Application Circuit PST81XX VDD VDD 2 VIN PST 81XX Reset 1 OUT 3 GND Logic System IC for CMOS System Reset PST81XX, 82XX Series MITSUMI PST82XX VDD VDD 2 VIN PST 82XX Logic 1 OUT System Reset 3 GND * 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. VIN VDD VIN PST 81XX GND VDD 2 1 OUT 3 2 PST 82XX GND 1 OUT 3 * Please note that there is any possibility of circuit oscillation when resistance put in the line VIN. * Please do not put resistance for PST81XX. * Recommend 15k or less for PST82XX.