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1 / 12 page © Semiconductor Components Industries, LLC, 2005 February, 2005 − Rev. 12 1 Publication Order Number: MC34064/D MC34064, MC33064, NCV33064 Undervoltage Sensing Circuit 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. The MC devices are packaged in 3−pin TO-92, micro size TSOP−5, 8−pin SOIC−8 and Micro8 t surface mount packages. The NCV device is packaged in SOIC−8 and TO−92. Applications include direct monitoring of the 5.0 V MPU/logic power supply used in appliance, automotive, consumer and industrial equipment. Features • Trimmed−In−PackageTemperature Compensated Reference • 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 • Internal Clamp Diode for Discharging Delay Capacitor • Guaranteed Reset Operation with 1.0 V Input • Low Standby Current • Economical TO−92, TSOP−5, SOIC−8 and Micro8 Surface Mount Packages • NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes • Pb−Free Packages are Available 1.2 Vref 2 (2) 1 (1) 3 (4) Reset GND Input = Sink Only Positive True Logic Pin numbers adjacent to terminals are for the 3−pin TO−92 package. Pin numbers in parenthesis are for the 8−lead packages. This device contains 21 active transistors. Figure 1. Representative Block Diagram http://onsemi.com 1 2 3 Pin 1. Reset 2. Input 3. Ground TO−92 P SUFFIX CASE 29 8 1 (Top View) 3 1 N.C. Ground N.C. N.C. 2 4 8 7 6 5 N.C. N.C. Input Reset 8 1 PIN CONNECTIONS ORDERING INFORMATION SOIC−8 D SUFFIX CASE 751 Micro8 DM SUFFIX CASE 846A TSOP−5 SN SUFFIX CASE 483 1 5 Pin 1. Reset 2. Input 3. Ground 4. NC 5. NC See detailed ordering and shipping information in the package dimensions section on page 6 of this data sheet. See general marking information in the device marking section on page 7 of this data sheet. DEVICE MARKING INFORMATION |
Số phần tương tự - MC33064D-005 |
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Mô tả tương tự - MC33064D-005 |
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