SUPPLY VOLTAGE MONITOR ZM33164-3 ISSUE 4 – JULY 2006 DEVICE DESCRIPTION FEATURES 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. • • • • • • SCHEMATIC DIAGRAM 4-99 © Zetex Semiconductors plc 2006 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 The device is available in a TO92 package for through hole applications as well as SOT223 for surface mount requirements. Issue 4 - July 2006 SOT223 and TO92 packages Microprocessor systems Computers Computer peripherals Instrumentation Automotive Battery powered equipment ZM33164-3 500 5 400 4 Output Voltage (V) Input Current (µA) TYPICAL CHARACTERISTICS 300 200 -40 °C 25 °C 85 °C 100 R L =10K T A=25 °C 3 2 1 0 0 0 2 4 6 8 10 0 1 Input Voltage (V) Input Current vs. Input Voltage 50 2 3 4 5 Input Voltage (V) Output Voltage vs. Input Voltage R L =10K Vin=2.4V 40 Vin (V) 2.4 -40 °C 4 25 °C 20 85 °C 2 Vout (V) Sink Current (mA) 3.0 30 10 0 0 0 0.4 0.8 1.2 1.6 0 2.0 1 3 2 4 Time (µs) Output Saturation Voltage (V) Output Saturation Voltage vs. Sink Current Reset Delay Time 100 2.77 Vin = 0V 2.75 Threshold Voltage (V) Forward Current (mA) 80 60 85 °C 25 °C 40 -40 °C 20 Upper Threshold 2.73 2.71 2.69 2.67 Lower Threshold 2.65 0 0 0.4 0.8 1.2 1.6 -40 2.0 Forward Voltage (V) -20 0 20 40 60 80 100 Temperature ( °C) Clamp Diode Forward Current vs. Voltage Threshold Voltage vs. Temperature 4-101 Issue 4 - July 2006 © 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 Power Dissipation TO92 SOT223 780mW 2W(Note 2) Internally limited 100mA 150°C -40 to 85°C -65 to 150°C TEST CONDITIONS (Tamb=25°C for typical values, Tamb=-40 to 85°C for min/max values (Note3)) COMPARATOR MIN TYP. MAX. PARAMETER SYMBOL UNITS Threshold Voltage High state output (Vcc increasing) V IH 2.55 2.71 2.8 V Threshold Voltage Low state output (Vcc decreasing) VIL 2.55 2.65 2.8 V Hysteresis VH 0.03 0.06 0.15 V (Vcc=2.4V, Isink=8.0mA) 0.46 1.0 V (Vcc=2.4V, Isink=2.0mA) 0.15 0.4 V 0.25 V 20 60 mA 0.02 0.5 µA 1.2 1.5 V OUTPUT Output sink saturation: V OL (Vcc=1.0V, Isink=0.1mA) Onstate output sink current (Vcc , Output=2.4V) Isink Offstate output leakage current (Vcc , Output=3V) Ioh Clamp diode forward voltage (If=10mA) Vf Propagation delay (Vin 3V to 2.4V, Rl=10k, Tamb=25°C) Td 10 0.6 µs 2.5 TOTAL DEVICE Operating input voltage range Vcc Quiescent input current (Vcc=3V) Iq 1.0 to 10 V 125 190 µA 4-100 Issue 4 - July 2006 © 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. æ T DY = RCd ln ç ç 1 ç è − 1 ö VTH (mpu ) ÷÷ Vin ÷ ø TDY =Time (Seconds) VTH =Microprocessor Reset Threshold Vin =Power Supply Voltage 4-102 Issue 4 - July 2006 © Zetex Semiconductors plc 2006 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 Package Part Mark ZM331643G SOT223 ZM331643 ZM331643C TO92 ZM331643 Europe Americas Asia Pacific Corporate Headquarters Zetex GmbH Streitfeldstraße 19 D-81673 München Germany Zetex Inc 700 Veterans Memorial Highway Hauppauge, NY 11788 USA Zetex (Asia Ltd) 3701-04 Metroplaza Tower 1 Hing Fong Road, Kwai Fong Hong Kong Zetex Semiconductors plc Zetex Technology Park, Chadderton Oldham, OL9 9LL United Kingdom Telefon: (49) 89 45 49 49 0 Fax: (49) 89 45 49 49 49 [email protected] Telephone: (1) 631 360 2222 Fax: (1) 631 360 8222 [email protected] Telephone: (852) 26100 611 Fax: (852) 24250 494 [email protected] Telephone: (44) 161 622 4444 Fax: (44) 161 622 4446 [email protected] 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 © Zetex Semiconductors plc 2006 www.zetex.com