ZSM330GTA

SUPPLY VOLTAGE MONITOR ZSM330 ISSUE 3 – JULY 2006 DEVICE DESCRIPTION FEATURES The ZSM330 is a three terminal under voltage monitor circuit for use in microprocessor systems. The threshold voltage of the device has been set to 3.1 volts making it ideal for 3.3 volt circuits. • • • • • • • Included in the device is a precise voltage reference and a comparator with built in hysteresis to prevent erratic operation. The ZSM330 features an open collector output capable of sinking at least l0mA which only requires a single external resistor to interface to following circuits. • • 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 3.1 volt threshold for 3.3 volt logic 20mV hysteresis prevents erratic operation 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. APPLICATIONS The device is available in a TO92 package for through hole applications as well as SOT223 for surface mount requirements. Automotive • • • • • • SCHEMATIC DIAGRAM 4-344 Issue 3 - July 2006 © Zetex Semiconductors plc 2006 Microprocessor systems Computers Computer peripherals Instrumentation Battery powered equipment ZSM330 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 10V 10V Power Dissipation TO92 SOT223 780mW 2W(Note 2) Internally limited 100mA 150°C -40 to 85°C -55 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) VIH 3.01 3.09 3.15 V Threshold Voltage Low state output (Vcc decreasing) VIL 3.01 3.07 3.15 V Hysteresis VH 0.01 0.02 0.05 V (Vcc=2.7V, Isink=8.0mA) 0.46 1.0 V (Vcc=2.7V, Isink=2.0mA) 0.15 0.4 V 0.25 V 27 60 mA 0.02 0.5 µA 1.2 1.5 V OUPUT Output sink saturation: VOL (Vcc=1.0V, Isink=0.1mA) Onstate output sink current (Vcc , Output=2.7V) Isink Offstate output leakage current (Vcc , Output=3.3V) Ioh Clamp diode forward voltage (If=10mA) Vf Propagation delay (Vin 3.3V to 2.7V, Rl=10k, Tamb=25°C) Td 10 0.6 µs 2.2 TOTAL DEVICE Operating input voltage range Vcc Quiescent input current (Vcc=3.3V) Iq 1.0 to 6.5 V 120 180 µA Note: 1. Maximum package power dissipation must be observed 2. Maximum power dissipation, for the SOT223 package is calculated assuming that the device is mounted on a PCB measuring 2 inches square. 3. Low duty cycle pulse techniques are used during test to maintain junction temperatures as close to ambient as possible 4-345 Issue 3 - July 2006 © Zetex Semiconductors plc 2006 www.zetex.com ZSM330 500 5 400 4 Output Voltage (V) Input Current (µA) TYPICAL CHARACTERISTICS 300 85 ˚C 200 -40 ˚C 100 25 ˚C 3 2 1 0 0 0 2 4 6 8 10 0 5 Input Current vs. Input Voltage Output Voltage vs. Input Voltage 2.7V R 10K 40 Vin (V) 3.3 30 2.7 2 -40 ˚C 4 25 ˚C 20 85 ˚C Vout (V) 2 10 0 0 0 0.4 0.8 1.2 1.6 0 2.0 1 4 Reset Delay Time Output Saturation Voltage vs. Sink Current 100 3 2 Time (µs) Output Saturation Voltage (V) 3.10 Vin=0V Upper Threshold 3.09 Threshold Voltage (V) 80 Forward Current (mA) 4 3 Input Voltage (V) 50 Sink Current (mA) 2 1 Input Voltage (V) 60 85 ˚C 25 ˚C 40 -40 ˚C 20 3.08 3.07 Lower Threshold 3.06 3.05 0 0 0.4 0.8 1.2 1.6 -40 2.0 -20 0 20 40 60 80 100 Temperature ( ˚C ) Forward Voltage (V) Clamp Diode Forward Current vs. Voltage Threshold Voltage vs. Temperature 4-346 Issue 3 - July 2006 © Zetex Semiconductors plc 2006 www.zetex.com ZSM330 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 V TH ( mpu ) ÷÷ V in ÷ ø TDY =Time (Seconds) VTH =Microprocessor Reset Threshold Vin =Power Supply Voltage 4-347 Issue 3 - July 2006 © Zetex Semiconductors plc 2006 www.zetex.com ZSM330 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 ZSM330G SOT223 ZSM330 ZSM330C TO92 ZSM330 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 europe.sales@zetex.com Telephone: (1) 631 360 2222 Fax: (1) 631 360 8222 usa.sales@zetex.com Telephone: (852) 26100 611 Fax: (852) 24250 494 asia.sales@zetex.com 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 to the products or services concerned. The company reserves the right to alter without notice the specification, design, price 4-348 or conditions of supply of any product or service. Issue 3 - July 2006 © Zetex Semiconductors plc 2006 www.zetex.com