Details, datasheet, quote on part number: ZSM561N8
CompanyZetex Inc.
DatasheetDownload ZSM561N8 datasheet
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Features, Applications

The is a three terminal under f or use i n microprocessor systems. The threshold voltage of the device has been set to 4.6 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 ZSM561 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. Also included a 6 volt zener diode connected between Vcc and Gnd. With just the addition of a low cost external NPN transistor and resistor, this zener allows the ZSM561 to provide both regulator and supply monitor functions The device is available a TO92 package for through hole applications as well as SO8 and SOT223 for surface mount requirements.


SO8, 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 4.6 volt threshold for 5 volt logic 20mV hysteresis prevents erratic operation


Microprocessor systems Computers Computer peripherals Instrumentation Automotive Battery powered equipment

Input Supply Voltage Supply Zener Current Offstate Output Voltage Onstate Output Sink Current(Note 1) Clamp Diode Forward Current(Note 7V 25mA continuous 7V Internally limited 100mA Operating Junction Temperature Operating Temperature Storage Temperature Power Dissipation 780mW(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 4.5 0.01

Output sink saturation: (Vcc=1.0V, Isink=0.1mA) Onstate output sink current (Vcc , Output=4V) 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(Note 5) Quiescent current (Vcc=5V) Vcc V A


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