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| SUPPLY VOLTAGE MONITOR ISSUE 4 - JULY 2006 DEVICE DESCRIPTION The ZM33164-3 is a three terminal under v o l t a g e m o n i t or c ir c ui t fo r u s e i n microprocessor systems. The threshold voltage of the device has been set to 2.68 volts making it ideal for 3 volt circuits. Included in the device is a precise voltage reference and a comparator with built in hysteresis to prevent erratic operation. The ZM33164-3 features an open collector output capable of sinking at least l0mA which only requires a single external resistor to interface to following circuits. Operation of the device is guaranteed from one volt upwards, from this level to the device threshold voltage the output is held low providing a power on reset function. Should the supply voltage, once established, at any time drop below the threshold level then the output again will pull low. The device is available in a TO92 package for through hole applications as well as SOT223 for surface mount requirements. ZM33164-3 FEATURES * * * * * * * * * * * * * * * SOT223 and TO92 packages Power on reset generator Automatic reset generation Low standby current Guaranteed operation from 1 volt Wide supply voltage range Internal clamp diode to discharge delay capacitor 2.68 volt threshold for 3 volt logic 60mV hysteresis prevents erratic operation APPLICATIONS Microprocessor systems Computers Computer peripherals Instrumentation Automotive Battery powered equipment SCHEMATIC DIAGRAM 4-99 Issue 4 - July 2006 (c) Zetex Semiconductors plc 2006 ZM33164-3 TYPICAL CHARACTERISTICS 500 5 R L=10K T A=25 C 400 4 Input Current (A) 300 Output Voltage (V) 3 200 -40 C 25 C 85 C 2 100 1 0 0 2 4 6 8 10 0 0 1 2 3 4 5 Input Voltage (V) Input Voltage (V) Input Current vs. Input Voltage 50 Vin=2.4V Output Voltage vs. Input Voltage R L=10K 40 3.0 Sink Current (mA) 30 -40 C 20 25 C 85 C 10 Vin (V) 2.4 4 0 0 0.4 0.8 1.2 1.6 2.0 Vout (V) 2 0 0 1 2 3 4 Output Saturation Voltage (V) Time (s) Output Saturation Voltage vs. Sink Current 100 Vin = 0V 2.75 2.77 Reset Delay Time 80 Upper Threshold Forward Current (mA) Threshold Voltage (V) 2.73 60 85 C 40 25 C -40 C 20 2.71 2.69 2.67 Lower Threshold 0 0 0.4 0.8 1.2 1.6 2.0 2.65 -40 -20 0 20 40 60 80 100 Forward Voltage (V) Temperature ( C) Clamp Diode Forward Current vs. Voltage Threshold Voltage vs. Temperature 4-101 Issue 4 - July 2006 (c) Zetex Semiconductors plc 2006 www.zetex.com ZM33164-3 ABSOLUTE MAXIMUM RATING Input Supply Voltage Offstate Output Voltage Onstate Output Sink Current(Note 1) Clamp diode Forward Current(Note 1) Operating junction temperature Operating Temperature Storage Temperature -1 to 12V 12V Internally limited 100mA 150C -40 to 85C -65 to 150C Power Dissipation TO92 SOT223 780mW 2W(Note 2) TEST CONDITIONS (Tamb=25C for typical values, Tamb=-40 to 85C for min/max values (Note3)) COMPARATOR PARAMETER Threshold Voltage High state output (Vcc increasing) Threshold Voltage Low state output (Vcc decreasing) Hysteresis SYMBOL V IH VIL VH MIN TYP. MAX. UNITS V V V 2.55 2.55 0.03 2.71 2.65 0.06 2.8 2.8 0.15 OUTPUT Output sink saturation: (Vcc=2.4V, Isink=8.0mA) (Vcc=2.4V, Isink=2.0mA) (Vcc=1.0V, Isink=0.1mA) Onstate output sink current (Vcc , Output=2.4V) Offstate output leakage current (Vcc , Output=3V) Clamp diode forward voltage (If=10mA) Propagation delay (Vin 3V to 2.4V, Rl=10k, Tamb=25C) Isink Ioh Vf Td 0.6 10 20 0.02 1.2 2.5 V OL 0.46 0.15 1.0 0.4 0.25 60 0.5 1.5 V V V mA A V s TOTAL DEVICE Operating input voltage range Quiescent input current (Vcc=3V) Vcc Iq 1.0 to 10 125 190 V A 4-100 Issue 4 - July 2006 (c) Zetex Semiconductors plc 2006 www.zetex.com ZM33164-3 TIMING DIAGRAM Vcc Threshold Voltage 1V Output Output Undefined Output Undefined APPLICATION CIRCUIT Note 4: A time delayed reset can be accomplished with the additional Cd. T DY = RCd ln o / / / o 1- 1 VTH (mpu ) Vin Issue 4 - July 2006 (c) Zetex Semiconductors plc 2006 e c c c ae TDY =Time (Seconds) VTH =Microprocessor Reset Threshold Vin =Power Supply Voltage 4-102 www.zetex.com ZM33164-3 CONNECTION DIAGRAMS TO92 Package Suffix - C SOT223 Package Suffix - G Bottom View Top View - Pin 4 floating or connected to pin 2 ORDERING INFORMATION Part Number ZM331643G ZM331643C Package SOT223 TO92 Part Mark ZM331643 ZM331643 Europe Zetex GmbH Streitfeldstrae 19 D-81673 Munchen Germany Telefon: (49) 89 45 49 49 0 Fax: (49) 89 45 49 49 49 europe.sales@zetex.com Americas Zetex Inc 700 Veterans Memorial Highway Hauppauge, NY 11788 USA Telephone: (1) 631 360 2222 Fax: (1) 631 360 8222 usa.sales@zetex.com Asia Pacific Zetex (Asia Ltd) 3701-04 Metroplaza Tower 1 Hing Fong Road, Kwai Fong Hong Kong Telephone: (852) 26100 611 Fax: (852) 24250 494 asia.sales@zetex.com Corporate Headquarters Zetex Semiconductors plc Zetex Technology Park, Chadderton Oldham, OL9 9LL United Kingdom Telephone: (44) 161 622 4444 Fax: (44) 161 622 4446 hq@zetex.com For international sales offices visit www.zetex.com/offices Zetex products are distributed worldwide. For details, see www.zetex.com/salesnetwork This publication is issued to provide outline information only which (unless agreed by the company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contact or be regarded as a representation relating 4-103 to the products or services concerned. The company reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service. Issue 4 - July 2006 (c) Zetex Semiconductors plc 2006 www.zetex.com |
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