zsm560 Zetex Semiconductors plc., zsm560 Datasheet

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zsm560

Manufacturer Part Number
zsm560
Description
Zsm560 - Supply Voltage Monitor
Manufacturer
Zetex Semiconductors plc.
Datasheet

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ZSM560
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zsm560GTA
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Issue 4 - July 2006
© Zetex Semiconductors plc 2006
SUPPLY VOLTAGE
MONITOR
ISSUE 4 – JULY 2006
DEVICE DESCRIPTION
The ZSM560 is a three terminal under
v o l t a g e m o n i t o r c i r c u i t f o r u s e 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
ZSM560 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 in a TO92 package for
through hole applications as well as SOT223
for surface mount requirements.
SCHEMATIC DIAGRAM
4-359
FEATURES
APPLICATIONS
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
4.6 volt threshold for 5 volt logic
20mV hysteresis prevents erratic operation
Microprocessor systems
Computers
Computer peripherals
Instrumentation
Automotive
Battery powered equipment
Internal clamp diode to discharge
ZSM560

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zsm560 Summary of contents

Page 1

... SUPPLY VOLTAGE MONITOR ISSUE 4 – JULY 2006 DEVICE DESCRIPTION The ZSM560 is a three terminal under microprocessor systems. The threshold voltage of the device has been set to 4.6 volts making it ideal for 5 volt circuits. ...

Page 2

... ZSM560 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 TEST CONDITIONS (T =25°C for typical values, T amb COMPARATOR PARAMETER Threshold Voltage High state output (Vcc increasing) ...

Page 3

... Clamp Diode Forward Current vs. Voltage Issue 4 - July 2006 © Zetex Semiconductors plc 2006 TYPICAL CHARACTERISTICS -40 °C 25 °C 85 ° (V) -40 °C 25 °C 85 °C 1.2 1.6 2.0 4.70 4.65 85 °C 4.60 25 °C -40 °C 4.55 4.50 1.2 1.6 2.0 4-361 ZSM560 10 R =10K L T =25 ° Input Voltage (V) Output Voltage vs. Input Voltage R =10K ...

Page 4

... ZSM560 TIMING DIAGRAM Vcc Threshold Voltage 1 V Output Output Undefined APPLICATION CIRCUIT Note 4: A time delayed reset can be accomplished with the additional Cd. = RCd ln æ ç − ç ç è Issue 4 - July 2006 © Zetex Semiconductors plc 2006 1 ö T =Time (Seconds) ÷ ...

Page 5

... Metroplaza Tower 1 Hing Fong Road, Kwai Fong Hong Kong Telephone: (852) 26100 611 Fax: (852) 24250 494 asia.sales@zetex.com 4-363 ZSM560 Corporate Headquarters Zetex Semiconductors plc Zetex Technology Park, Chadderton Oldham, OL9 9LL United Kingdom Telephone: (44) 161 622 4444 Fax: (44) 161 622 4446 hq@zetex ...

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