ZSH330N8 ZETEX [Zetex Semiconductors], ZSH330N8 Datasheet

ZSH330N8

Manufacturer Part Number

ZSH330N8

Description

SUPPLY VOLTAGE MONITOR

Manufacturer

ZETEX [Zetex Semiconductors]

Datasheet

1.ZSH330N8.pdf (5 pages)

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SUPPLY VOLTAGE

MONITOR

ISSUE 1 - DECEMBER 1997

DEVICE DESCRIPTION

The ZSH330 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

ZSH330 features an open collector output

capable of sourcing 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

high 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 high.

The device is available in a TO92 package for

through hole applications as well as SO8 and

SOT223 for surface mount requirements.

SCHEMATIC DIAGRAM

4-329

FEATURES

APPLICATIONS

Vcc

Out

Gnd

SO8, SOT223 and TO92 packages

Power on reset generator

Automatic reset generation

Low standby current

Guaranteed operation from 1 volt

Wide supply voltage range

delay capacitor

3.1 volt threshold for 3.3 volt logic

20mV hysteresis prevents erratic operation

Microprocessor systems

Computers

Computer peripherals

Instrumentation

Automotive

Battery powered equipment

Internal clamp diode to discharge

ZSH330

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ZSH330N8 Summary of contents

Page 1

SUPPLY VOLTAGE MONITOR ISSUE 1 - DECEMBER 1997 DEVICE DESCRIPTION The ZSH330 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 ...

Page 2

ZSH330 ABSOLUTE MAXIMUM RATING Input Supply Voltage Offstate Output Voltage Onstate Output Source Current( ) Note 1 Clamp Diode Forward Current( ) Note 1 Operating Junction Temperature Operating Temperature Storage Temperature TEST CONDITIONS (T =25°C for typical values, T amb ...

Page 3

TYPICAL CHARACTERISTICS 500 400 300 200 100 85°C 25°C -40° Input Voltage (V) Input Current v Input Voltage 0.8 -40°C 0.6 25°C 85°C 0.4 0.2 0.0 0.0 0.4 0.8 1.2 ...

Page 4

ZSH330 TIMING DIAGRAM APPLICATION CIRCUIT Note 4: A time delayed reset can be accomplished with the additional Cd RCd =Time (Seconds =Microprocessor Reset Threshold (ground referenced) ...

Page 5

... SO8 Package Suffix – N8 Top View TO92 Package Suffix – C Bottom View ORDERING INFORMATION Part No Package Partmark ZSH330C TO92 ZSH330 ZSH330G SOT223 ZSH330 ZSH330N8 SO8 ZSH330 SOT223 Package Suffix – G Top View – Connect pin 4 to pin 2 or leave pin 4 electrically isolated 4-333 ZSH330 ...

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