Order this document by MC34064/D The MC34064 is an undervoltage sensing circuit specifically designed for use as a reset controller in microprocessor-based systems. It offers the designer an economical solution for low voltage detection with a single external resistor. The MC34064 features a trimmed-in-package bandgap reference, and a comparator with precise thresholds and built-in hysteresis to prevent erratic reset operation. The open collector reset output is capable of sinking in excess of 10 mA, and operation is guaranteed down to 1.0 V input with low standby current. These devices are packaged in 3-pin TO-226AA, 8-pin SO–8 and Micro–8 surface mount packages. Applications include direct monitoring of the 5.0 V MPU/logic power supply used in appliance, automotive, consumer and industrial equipment. • Trimmed-In-Package Temperature Compensated Reference • • • • • • • • UNDERVOLTAGE SENSING CIRCUIT SEMICONDUCTOR TECHNICAL DATA Comparator Threshold of 4.6 V at 25°C Precise Comparator Thresholds Guaranteed Over Temperature Comparator Hysteresis Prevents Erratic Reset Reset Output Capable of Sinking in Excess of 10 mA P SUFFIX PLASTIC PACKAGE CASE 29 (TO–226AA) 1 Internal Clamp Diode for Discharging Delay Capacitor Pin 1. Reset 2. Input 3. Ground 2 3 Guaranteed Reset Operation with 1.0 V Input Low Standby Current Economical TO–226AA, SO–8 and Micro–8 Surface Mount Packages D SUFFIX PLASTIC PACKAGE CASE 751 (SO–8) DM SUFFIX PLASTIC PACKAGE CASE 846A (Micro–8) Representative Block Diagram Input 8 1 8 1 2 (2) Reset Reset 1 8 N.C. Input 2 7 N.C. N.C. 3 6 N.C. Ground 4 5 N.C. 1 (1) (Top View) 1.2 Vref ORDERING INFORMATION Device Gnd Operating Temperature Range Package 3 (4) = Sink Only Positive True Logic Pin numbers adjacent to terminals are for the 3–pin TO–226AA package. Pin numbers in parenthesis are for the 8–lead packages. This device contains 21 active transistors. MC34064D–5 MC34064DM–5 TA = 0° to +70°C Micro–8 MC34064P–5 TO–226AA MC33064D–5 SO–8 MC33064DM–5 TA = – 40° to +85°C MC33064P–5 Motorola, Inc. 1996 MOTOROLA ANALOG IC DEVICE DATA SO–8 Micro–8 TO–226AA Rev 2 1 MC34064 MC33064 MAXIMUM RATINGS Symbol Value Unit Power Input Supply Voltage Rating Vin –1.0 to 10 V Reset Output Voltage VO 10 V ISink Internally Limited mA IF 100 mA PD RθJA 625 200 mW °C/W PD RθJA 625 200 mW °C/W PD RθJA 520 240 mW °C/W Operating Junction Temperature TJ +150 °C Operating Ambient Temperature MC34064 MC33064 TA Reset Output Sink Current (Note 1) Clamp Diode Forward Current, Pin 1 to 2 (Note 1) Power Dissipation and Thermal Characteristics P Suffix, Plastic Package Maximum Power Dissipation @ TA = 25°C Thermal Resistance, Junction–to–Air D Suffix, Plastic Package Maximum Power Dissipation @ TA = 25°C Thermal Resistance, Junction–to–Air DM Suffix, Plastic Package Maximum Power Dissipation @ TA = 25°C Thermal Resistance, Junction–to–Air Storage Temperature Range NOTE: °C 0 to +70 –40 to +85 Tstg °C –65 to +150 ESD data available upon request. ELECTRICAL CHARACTERISTICS (For typical values TA = 25°C, for min/max values TA is the operating ambient temperature range that applies [Notes 2 and 3] unless otherwise noted.) Characteristics Symbol Min Typ Max VIH VIL VH 4.5 4.5 0.01 4.61 4.59 0.02 4.7 4.7 0.05 – – – 0.46 0.15 – 1.0 0.4 0.1 Unit COMPARATOR Threshold Voltage High State Output (Vin Increasing) Low State Output (Vin Decreasing) Hysteresis V RESET OUTPUT Output Sink Saturation (Vin = 4.0 V, ISink = 8.0 mA) (Vin = 4.0 V, ISink = 2.0 mA) (Vin = 1.0 V, ISink = 0.1 mA) VOL V Output Sink Current (Vin, Reset = 4.0 V) ISink 10 27 60 mA Output Off-State Leakage (Vin, Reset = 5.0 V) IOH – 0.02 0.5 µA Clamp Diode Forward Voltage, Pin 1 to 2 (IF = 10 mA) VF 0.6 0.9 1.2 V Operating Input Voltage Range Vin 1.0 to 6.5 – – V Quiescent Input Current (Vin = 5.0 V) Iin – 390 500 µA TOTAL DEVICE NOTES: 1. Maximum package power dissipation limits must be observed. 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. 3. Tlow = 0°C for MC34064 Thigh = +70°C for MC34064 –40°C for MC33064 +85°C for MC33064 2 MOTOROLA ANALOG IC DEVICE DATA MC34064 MC33064 Figure 1. Reset Output Voltage versus Input Voltage 5.0 RL = 10 k to Vin TA = 25°C 8.0 VO , OUTPUT VOLTAGE (V) VO , OUTPUT VOLTAGE (V) 1 0 Figure 2. Reset Output Voltage versus Input Voltage 6.0 4.0 2.0 0 0 2.0 4.0 6.0 Vin, INPUT VOLTAGE (V) 8.0 RL = 10 k to Vin TA = 25°C 4.0 3.0 2.0 1.0 0 1 0 4.56 0 Figure 3. Comparator Threshold Voltage versus Temperature 4.64 0 Figure 4. Input Current versus Input Voltage 1.0 4.630 RL = 10 k to Vin 4.620 Upper Threshold High State Output I in , INPUT CURRENT (mA) V th, THRESHOLD VOLTAGE (V) 4.58 4.60 4.62 0 V , INPUT VOLTAGE 0 (V) 0 in 4.610 4.600 4.590 Lower Threshold Low State Output 4.580 4.570 –55 –25 0 25 50 75 100 TA = +25°C 0.8 –40°C 0.6 +85°C 0.4 TA = +25°C +85°C 0.2 0 125 –40°C 0 2.0 4.0 6.0 8.0 TA, AMBIENT TEMPERATURE (°C) Vin, INPUT VOLTAGE (V) Figure 5. Reset Output Saturation versus Sink Current Figure 6. Reset Delay Time 10 2.0 Reset V OL, OUTPUT SATURATION (V) Vin = 4.0 V TA = 25°C Vin = 5.0 V to 4.0 V RL = 10 k TA = 25°C 90% 1.5 TA = 85°C Vin TA = –40°C 5.0 V – 1.0 4.0 V – Vin 10k 5.0V 4.0V 0.5 Reset 10% 0 REF 0 10 20 30 ISink, SINK CURRENT (mA) MOTOROLA ANALOG IC DEVICE DATA 40 200 ns/DIV 3 MC34064 MC33064 Figure 7. Clamp Diode Forward Current versus Voltage I F , FORWARD CURRENT (mA) 80 Vin = 0 V TA = 25°C 60 40 20 0 0 0.4 0.8 1.2 VF , FORWARD VOLTAGE (V) 1.6 Figure 8. Low Voltage Microprocessor Reset + R 2 (2) Reset Power Supply Microprocessor Circuit 1 (1) – CDLY – + A time delayed reset can be accomplished with the addition of CDLY. For systems with extremely fast power supply rise times (<500 ns) it is recommended that the RCDLY time constant be greater than 5.0 µs. Vth(MPU) is the microprocessor reset input threshold. 1.2 Vref 3 (4) 1 tDLY = RCDLY In Vth(MPU) 1– Vin Figure 9. Low Voltage Microprocessor Reset with Additional Hysteresis RH + Iin Test Data 2 (2) RL Power Supply 1 (1) – Reset Microprocessor Circuit – + 1.2Vref 3 (4) 4.6 RH VH ≈ + 0.02 RL ∆Vth(lower) ≈ 340 RH x 10–6 Where: RH ≤ 150 Ω Where: RL ≥ 1.5 Ω, ≤ 10 kΩ 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 (Figure 4). An increase of the lower threshold ∆Vth(lower) will be observed due to Iin which is typically 340 µA at 4.59 V. The equations are accurate to ±10% with RH less than 150 Ω and RL between 1.5 kΩ and 10 kΩ . 4 VH (mV) ∆Vth (mV) RH (Ω) RL (kΩ) 20 0 0 0 51 3.4 10 1.5 40 6.8 20 4.7 81 6.8 20 1.5 71 10 30 2.7 112 10 30 1.5 100 16 47 2.7 164 16 47 1.5 190 34 100 2.7 327 34 100 1.5 276 51 150 2.7 480 51 150 1.5 MOTOROLA ANALOG IC DEVICE DATA MC34064 MC33064 Figure 10. Voltage Monitor Figure 11. Solar Powered Battery Charger + 1.0k + – 2 (2) Power Supply 2 (2) 1 (1) 1 (1) – – – + + 1.2Vref 1.2Vref Solar Cells 3 (4) 3 (4) Figure 12. Low Power Switching Regulator 25µH MPSW51A Vin = 11.5 to 14.5V + 470 22 + + 470 1N5819 680 VO = 5.0 V IO = 50 mA 1.2k 4.7k 330 2 (2) 1N756 Test 1 (1) – + 1.2Vref Conditions Results Line Regulation Vin = 11.5 V to 14.5 V, IO = 50 mA 35 mV Load Regulation Vin = 12.6 V, IO = 0 mA to 50 mA 12 mV Output Ripple Vin = 12.6 V, IO = 50 mA 60 mVpp Efficiency Vin = 12.6 V, IO = 50 mA 77% 3 (4) Figure 13. MOSFET Low Voltage Gate Drive Protection VCC RL MTP3055EL 270 4.6V 2 (2) 1 (1) – + 1.2Vref 3 (4) 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 V threshold of the MC34064, its output grounds the gate of the L2 MOSFET. MOTOROLA ANALOG IC DEVICE DATA 5 MC34064 MC33064 OUTLINE DIMENSIONS A P SUFFIX PLASTIC PACKAGE CASE 29–04 (TO–226AA) ISSUE AD B R P L F SEATING PLANE NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. CONTOUR OF PACKAGE BEYOND DIMENSION R IS UNCONTROLLED. 4. DIMENSION F APPLIES BETWEEN P AND L. DIMENSION D AND J APPLY BETWEEN L AND K MINIMUM. LEAD DIMENSION IS UNCONTROLLED IN P AND BEYOND DIMENSION K MINIMUM. K DIM A B C D F G H J K L N P R V D X X G J H V C SECTION X–X 1 N N D SUFFIX PLASTIC PACKAGE CASE 751–05 (SO–8) ISSUE P B M –A– J M 5 4 X 45 _ 1 R 4X –B– 0.25 (0.010) P 8 K SEATING PLANE 8X D 0.25 (0.010) 6 F C –T– M T B S A S MILLIMETERS MIN MAX 4.45 5.20 4.32 5.33 3.18 4.19 0.41 0.55 0.41 0.48 1.15 1.39 2.42 2.66 0.39 0.50 12.70 ––– 6.35 ––– 2.04 2.66 ––– 2.54 2.93 ––– 3.43 ––– NOTES: 1. DIMENSIONS A AND B ARE DATUMS AND T IS A DATUM SURFACE. 2. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 3. DIMENSIONS ARE IN MILLIMETER. 4. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 5. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE. 6. DIMENSION D DOES NOT INCLUDE MOLD PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. G M_ INCHES MIN MAX 0.175 0.205 0.170 0.210 0.125 0.165 0.016 0.022 0.016 0.019 0.045 0.055 0.095 0.105 0.015 0.020 0.500 ––– 0.250 ––– 0.080 0.105 ––– 0.100 0.115 ––– 0.135 ––– DIM A B C D F G J K M P R MILLIMETERS MIN MAX 4.80 5.00 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 BSC 0.18 0.25 0.10 0.25 0_ 7_ 5.80 6.20 0.25 0.50 MOTOROLA ANALOG IC DEVICE DATA MC34064 MC33064 OUTLINE DIMENSIONS DM SUFFIX PLASTIC PACKAGE CASE 846A–02 (Micro–8) ISSUE B –A– –B– K PIN 1 ID G D 8 PL 0.08 (0.003) –T– M T B S A S SEATING PLANE 0.038 (0.0015) C H MOTOROLA ANALOG IC DEVICE DATA J L NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 4. DIMENSION D DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.25 (0.010) PER SIDE. DIM A B C D G H J K L MILLIMETERS MIN MAX 2.90 3.10 2.90 3.10 ––– 1.10 0.25 0.40 0.65 BSC 0.05 0.15 0.13 0.23 4.75 5.05 0.40 0.70 INCHES MIN MAX 0.114 0.122 0.114 0.122 ––– 0.043 0.010 0.016 0.026 BSC 0.002 0.006 0.005 0.009 0.187 0.199 0.016 0.028 7 MC34064 MC33064 Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. 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Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 or 602–303–5454 JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–81–3521–8315 MFAX: [email protected] – TOUCHTONE 602–244–6609 INTERNET: http://Design–NET.com ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298 8 ◊ *MC34064/D* MOTOROLA ANALOG IC DEVICE DATA MC34064/D