MC33064 / MC34064 (R) TM Undervoltage Sensing Circuit P RODUCTION D ATA S HEET KEY FEATURES DESCRIPTION Monitors 5V Supplies (VT = 4.6V Typ.) Outputs Fully Defined At VIN = 1V (See Figure 1) Glitch-Free Supply Current During Switching (See Product Highlight) Ultra-Low Supply Current (500A Max.) Temperature Compensated ICC For Extremely Stable Current Consumption P Reset Function Programmable With 1 External Resistor And Capacitor Comparator Hysteresis Prevents Output Oscillation Electrically Compatible With Motorola MC34064 Pin-to-Pin Compatible With Motorola MC34064 / MC34164 collector output stage capable of sinking up to 60mA. The MC34064's RESET output is specified to be fully functional at VIN=1V. A major improvement over competing products is the glitch-free supply current during undervoltage detection. Competing products demand a step function increase in operating current during the time that you least want or need it: during power loss. See Product Highlight below. IMPORTANT: For the most current data, consult MICROSEMI's website: http://www.microsemi.com PRODUCT HIGHLIGHT WWW . Microsemi .C OM The MC34064 is an undervoltage sensing circuit designed specifically for use as a reset controller in microprocessor- based systems. It offers the designer an economical, space-efficient solution for low supply voltage detection when used in combination with a single pullup resistor. Adding one capacitor offers the functionality of a programmable delay time after power returns. The 34064 consists of a temperature stable reference comparator with hysteresis, high-current clamping diode and open APPLICATIONS All Microprocessor Or Microcontroller Designs Using 5V Supplies Simple 5V Undervoltage Detection PACKAGE ORDER INFO TA (C) 0 to 70 -40 to 85 DM Plastic SOIC 8-Pin LP Plastic TO-92 3-Pin Plastic SOT-89 3-Pin PK RoHS / Pb-free Transition DC: 0440 RoHS / Pb-free Transition DC: 0509 RoHS / Pb-free Transition DC: 0518 MC34064DM MC33064DM MC34064LP MC33064LP MC34064PK MC33064PK MC3X064 Note: Available in Tape & Reel. Append the letters "TR" to the part number. (i.e. LX34064DM-TR) Copyright (c) 1999 Rev. 1.4, 2006-12-14 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 2.1 MC33064 / MC34064 (R) TM Undervoltage Sensing Circuit P RODUCTION D ATA S HEET ABSOLUTE MAXIMUM RATINGS PACKAGE PIN OUT RESET 1 8 N.C. VIN 2 7 N.C. N.C. 3 6 N.C. GROUND 4 5 N.C. DM PACKAGE (Top View) Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of specified terminal. THERMAL DATA DM Plastic SOIC 8-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, JA PK THERMAL RESISTANCE-JUNCTION TO AMBIENT, JA 2 VIN 1 RESET (Top View) RESET 1 GROUND 2 VIN 3 156C/W Plastic SOT-89 3-Pin THERMAL RESISTANCE-JUNCTION TO TAB, JT GROUND LP PACKAGE 165C/W LP Plastic TO-92 3-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, JA 3 WWW . Microsemi .C OM Input Supply Voltage (VIN) ................................................................................ -1V to 10V RESET Output Voltage (VOUT)......................................................................................10V Output Sink Current (IOL) .............................................................. Internally Limited (mA) Clamp Diode Forward Current (IF), Pin 1 to Pin 2....................................................100mA Operating Temperature Range ................................................................................... 150C Operating Ambient Temperature Range (TA) MC34064 ......................................................................................................... 0C to 70C MC33064 .......................................................................................................-40C to 85C Storage Temperature Range.........................................................................-65C to 150C Package Peak Temp. for Solder Reflow (40 seconds maximum exposure) ... 260C (+0 -5) 35C/W 71C/W PK PACKAGE (Top View) Junction Temperature Calculation: TJ = TA + (PD x JA). The JA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. RoHS / Pb-free 100% matte Tin Lead Finish RECOMMENDED OPERATING CONDITIONS Conditions: Range over which the device is functional. Parameter Symbol Min MC3x064 Typ Max Units Copyright (c) 1999 Rev. 1.4, 2006-12-14 VIN VOUT IF 1 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 6.5 6.5 50 V V mA PACKAGE DATA Input Supply Voltage RESET Output Voltage Clamp Diode Forward Current Page 2 2.1 MC33064 / MC34064 (R) TM Undervoltage Sensing Circuit P RODUCTION D ATA S HEET IC ELECTRICAL CHARACTERISTICS Parameter VT+ VTVH Min MC3x064 Typ Max Units VIN Increasing - 4V to 5V VIN Decreasing - 5V to 4V 4.5 4.5 0.01 4.61 4.59 0.02 4.7 4.7 0.05 V V V RESET OUTPUT SECTION Output Low Level Saturation Voltage Output Low Level Current Output Off-State Leakage Clamp Diode Forward Voltage Test Conditions COMPARATOR SECTION Threshold Voltage High State Output Low State Outputs Hysteresis Symbol VOL VIN = 4.0V, IOL = 8.0mA 1.0 V IOL VF VIN = 4.0V, IOL = 2.0mA VIN = 1.0V, IOL = 0.1mA VIN = VOUT = 4.0V VIN = VOUT = 5.0V Pin 1 to Pin 2, IF = 10mA 27 0.02 0.9 0.4 0.1 60 0.5 1.2 V V mA A V ICC VIN = 5.0V 390 500 A IOH 10 0.6 WWW . Microsemi .C OM Unless otherwise specified, the following specifications apply over the operating ambient temperature 0C TA 70C for the MC34064 and -40C < TA < 85C for the MC33064. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature. TOTAL DEVICE Supply Current CHART AND APPLICTION INDEX Characteristic Curves Figure # 1. Input Voltage and RESET Output Voltage vs. Time 2. Power-Up RESET Voltage 3. Power-Down RESET Voltage 4. 5. 6. 7. 8. 9. RESET Output Voltage vs. Input Voltage Threshold Voltage vs. Temperature Threshold Hysteresis vs. Temperature Supply Current vs. Input Voltage Supply Current vs. Temperature Low Level Output Current vs. Temperature Low Level Output Saturation Voltage vs. Temperature Low Level Output Saturation Voltage vs. Temperature Clamp Diode Forward Voltage vs. Forward Current Propagation Delay - HIGH to LOW Propagation Delay - LOW to HIGH 10. 11. 12. 13. 14. Application Circuits Figure # 15. Low Voltage Microprocessor Reset Switching the Load off when Battery Reaches 16. Below 4.3V 17. Voltage Monitor 18. MOSFET Low Voltage Gate Drive Protection Low Voltage Microprocessor Reset with Additional 19. Hysteresis 20. Solar Powered Battery ELECTRICALS Copyright (c) 1999 Rev. 1.4, 2006-12-14 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 2.1 MC33064 / MC34064 (R) TM Undervoltage Sensing Circuit P RODUCTION D ATA S HEET SIMPLIFIED BLOCK DIAGRAM WWW . Microsemi .C OM VIN RESET _ + 1.2 VREF GROUND Simplified Block Diagram ELECTRICALS Copyright (c) 1999 Rev. 1.4, 2006-12-14 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 2.1 MC33064 / MC34064 (R) TM Undervoltage Sensing Circuit P RODUCTION D ATA S HEET CHARACTERISTIC CURVES WWW . Microsemi .C OM Figure 2 - Power-Up RESET Voltage Figure 3 - Power-Down RESET Voltage Figure 4 - RESET Output Voltage vs. Input Voltage Figure 5 - Threshold Voltage vs. Temperature Figure 6 - Threshold Hysteresis vs. Temperature Copyright (c) 1999 Rev. 1.4, 2006-12-14 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 GRAPHS Figure 1 - Input Voltage and RESET Output Voltage vs. Time Page 5 2.1 MC33064 / MC34064 (R) TM Undervoltage Sensing Circuit P RODUCTION D ATA S HEET CHARACTERISTIC CURVES WWW . Microsemi .C OM Figure 8 - Supply Current vs. Temperature Figure 9 - Low Level Output Current vs. Temperature Figure 10 - Low Level Output Saturation Voltage vs. Temperature Figure 11 - Low Level Output Saturation Voltage vs. Temperature Figure 12 - Clamp Diode Forward Voltage vs. Forward Current Copyright (c) 1999 Rev. 1.4, 2006-12-14 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 GRAPHS Figure 7 - Supply Current vs. Input Voltage Page 6 2.1 MC33064 / MC34064 TM (R) Undervoltage Sensing Circuit P RODUCTION D ATA S HEET CHARACTERISTIC CURVES WWW . Microsemi .C OM Figure 13 - Propagation Delay - HIGH to LOW Figure 14 - Propagation Delay - LOW to HIGH GRAPHS Copyright (c) 1999 Rev. 1.4, 2006-12-14 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 7 2.1 MC33064 / MC34064 (R) TM Undervoltage Sensing Circuit P RODUCTION D ATA S HEET TYPICAL APPLICATION CIRUITS WWW . Microsemi .C OM Figure 15 - Low Voltage Microprocessor Reset A time delayed reset can be accomplished with the addition of CDLY. For systems with extremely fast power supply rise times (<500ns) it is recommended that the RCDLY time constant be greater than 5.0s. VTH(MPU) is the microprocessor reset input threshold. Figure 16 - Switching the Load off When battery Reaches Below 4.3V Figure 18 - MOSFET Low Voltage gate Drive Protection Figure 17 - Voltage Monitor Overheating of the logic level power MOSFET due to insufficient gate voltage can be prevented with the above circuit. When the input signal is below the 4.6 volt threshold of the MC34064, its output grounds the gate of the L2 MOSFET. GRAPHS Copyright (c) 1999 Rev. 1.4, 2006-12-14 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 8 2.1 MC33064 / MC34064 TM (R) Undervoltage Sensing Circuit P RODUCTION D ATA S HEET TYPICAL APPLICATION CIRUITS 4.6RH + 0.02 RL VTH(LOWER) = 340R H * 10 -6 Where : RH = 150 RL = 1.5 = 10k Figure 19 - Low Voltage Microprocessor Reset with Additional Hysteresis. Test Data VTH RH (mV) () 0 0 3.4 10 6.8 20 6.8 20 10 30 10 30 16 47 16 47 34 100 34 100 51 150 51 150 RL () 0 1.5 4.7 1.5 2.7 1.5 2.7 1.5 2.7 1.5 2.7 1.5 WWW . Microsemi .C OM VH = VH (mV) 20 51 40 81 71 112 100 164 190 327 276 480 Comparator hysteresis can be increased with the addition of resistor RH. The hysteresis equation has been simplified and does not account for the change of input current IIN as VCC crosses the comparator threshold. An increase of the lower threshold. VTH(LOWER) will be observed due to IIN which is typically 340A at 4.59V. The equations are accurate to 10% with RH less than 150 and RL between 1.5k and 10k. Figure 20 - Solar Powered Battery Charger GRAPHS Copyright (c) 1999 Rev. 1.4, 2006-12-14 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 9 2.1 MC33064 / MC34064 TM (R) Undervoltage Sensing Circuit P RODUCTION D ATA S HEET NOTES WWW . Microsemi .C OM NOTES PRODUCTION DATA - Information contained in this document is proprietary to Microsemi and is current as of publication date. This document may not be modified in any way without the express written consent of Microsemi. Product processing does not necessarily include testing of all parameters. Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright (c) 1999 Rev. 1.4, 2006-12-14 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 10 2.1