 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| MITSUMI System Reset PST611 System Reset Monolithic IC PST611 Outline This IC functions in a variety of CPU systems and other logic systems, to constantly monitor power supply voltage, and to reset the system accurately when power is turned on or interrupted. System reset ICs have been represented by the PST series in the past, but this IC is able to set no-response time through an external capacitor, and controls reset output relative to temporary power supply voltage drop caused by motor load or the like in systems using batteries. Also, the detection voltage for this IC is set low so that it can respond to systems that operate on low voltage. Features 1. 2. 3. 4. 5. Low current consumption Low operating limit voltage High reset output No-response time can be controlled 8 types of detection voltages provided ICCH=2.2A 0.75V max. ICCL=3.2A PST611 R : 1.6V typ. S : 1.5V typ. T : 1.4V typ. U : 1.3V typ. V : 1.2V typ. W : 1.1V typ. X : 1.0V typ. Y : 0.9V typ. Package MMP-4A (PST611 M) contains detection voltage rank. * Applications 1. 2. 3. 4. Reset circuits in microcomputers, CPUs and MPUs Set voltage drop detection Battery voltage check circuits. Voltage detection circuits in general Absolute Maximum Ratings Item Storage temperature Operating temperature Power supply voltage Allowable loss (Ta=25C) Symbol TSTG TOPR VCC max. Pd Rating -40~+125 -10~+70 -0.3~+5 200 Units C C V mW MITSUMI System Reset PST611 Electrical Characteristics Item (Ta=25C) Symbol ICCH ICCL Measurement conditions VCC=0.95V, VR=OPEN VCC=1.2V, VR=OPEN R S T U VCC: variable=3V V W X Y VCC=1.2V, VTC=0.4V, VR=3V VCC=0.95V, VTC=0.1V, VR=3V VCC=0V, VTC=0.1V, VR=0V Min. Typ. 2.2 3.2 1.552 1.6 1.455 1.5 1.358 1.4 1.261 1.3 1.164 1.2 1.067 1.1 0.970 1.0 0.873 0.9 0.1 0.05 16 33 200 0.06 0.08 0.06 0.09 Max. Units A Consumption current A 1.648 V 1.545 V 1.442 V 1.339 V Detection voltage Vs 1.236 V 1.133 V 1.030 V 0.927 V A TC pin charge current ITC1 A TC pin discharge current ITC2 66 MEG TC pin discharge resistance RTC Detection voltage temperature coefficient Vs ppm VCC=1.0V, VTC: variable=3V 0.10 V TC pin threshold VTHTC TC pin hysteresis voltage VTHTCH VCC=1.0V, VTC : variable=3V 0.12 V R output leakage current ILEAK VCC=0.95V, VR=3V 0.1 A R output sync current IOL VCC=1.0V, VTC=0.4V, VR=0.4V 15 50 A Operation limit voltage VOPL VCC : variable VTC=0.4V, VR=3V 0.7 0.75 V Note: Characteristics other than for detection voltage use the 1.0V(X) type as a representative example. Pin Assignment 1 2 3 1 2 4 ROUT VCC TC GND 4 3 MMP-4A Equivalent Circuit Diagram MITSUMI System Reset PST611 Measuring Circuit Measurement Method Measurement conditions Item VCC 1.2V VTC VR SW1 OFF SW2 3 Measured value A1 Measure A1 value. Gradually lower VCC from Detection voltage Variable 3V OFF 1 V1 1.2V and measure the value of V1 when V2 value switches from low to high. TC pin charge current TC pin discharge current TC pin discharge resistance 1.2V 0.95V 0V 0.4V 0.2V 0.1V 3V 3V 0V ON ON ON 1 1 1 A2 A2 A2 Measure A2 value. Measure A2 value. 0.1V/A2 value Gradually lower VTC from 0.3V and measure the value TC pin threshold 1.0V Variable 3V ON 1 V3 of V3 when V2 value switches from low to high. (VTHTC) The value of V3 when V2 TC pin hysteresis voltage 1.0V Variable 3V ON 1 V3 switches from high to low while raising VTC from 0.0V, minus "VTHTC." R output leakage current R output sync current 0.95V 1.0V 0.4V 3V 0.4V OFF ON 2 2 A3 A3 Measure A3K value. Measure A3 value. The limit voltage within Operation limit voltage Variable 0.4V 3V OFF 1 V1 which V2 value stays low while lowering VCC from 1.0V. Reference Consumption current MITSUMI System Reset PST611 Delay Characteristics Ct=0.01F VCC V3 T3 0.7V T2 (100mS) T1 (20mS) ROUT Note 1: Delay times T1 and T2 are found from the formulae below. T1 (S)=CTx (2.0x106) T2 (S)=CTx107 Note 2: ROUT is not output if VCC is temporarily lower than VS. Application circuits Rise delay time (T1) and No-response time (T2) using external capacitor 10000.00 Delay time (mS) 1000.00 T2 100.00 T1 10.00 1.00 0.0001 0.001 0.01 0.1 1 (F) External capacitance C MITSUMI System Reset PST611 Application circuits 1. How to change reset output logic Note: Set R1 so that V1 > threshold voltage. 2. How to change detection voltage (detection voltage UP) Note: Set R1 so that the value of I1 is sufficient to ignore ICC. 3 Battery checker (LED ON for high voltage) Note: When VCC is less than LED VF, take LED lamp power from DC-DC converter or other output. |
Price & Availability of PST611
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |