Details, datasheet, quote on part number: ZSM530C
DescriptionReset Low Monitor
CompanyZetex Inc.
DatasheetDownload ZSM530C datasheet
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Features, Applications

The is a three terminal under voltage monitor circuit for use in microprocessor systems. The threshold voltage of the device has been set to 4.3 volts making it ideal for 5 volt circuits. Included in the device is a precise voltage reference and a comparator with built in hysteresis to prevent erratic operation. The ZSM530 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 a TO92 package for through hole applications as well as SOT223 for surface mount requirements.


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 4.3 volt threshold for 5 volt logic 20mV hysteresis prevents erratic operation


Microprocessor systems Computers Computer peripherals Instrumentation Automotive Battery powered equipment

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 to 10V Internally limited to 150C Power Dissipation 2W(Note 2)

TEST CONDITIONS (Tamb=25C for typical values, 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 VIH VIL 4.2 0.01

Output sink saturation: (Vcc=1.0V, Isink=0.1mA) Onstate output sink current (Vcc , Output=3.8V) Offstate output leakage current (Vcc , Output=5V) Clamp diode forward voltage (If=10mA) Propagation delay (Vin Rl=10k, Tamb=25C) Isink Ioh Vf Td VOL V s

Operating input voltage range Quiescent input current (Vcc=5V) Vcc V A

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. 4-355


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