zm33164 Zetex Semiconductors plc., zm33164 Datasheet

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zm33164

Manufacturer Part Number
zm33164
Description
Supply Voltage Monitor
Manufacturer
Zetex Semiconductors plc.
Datasheet

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ZM33164
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SUPPLY VOLTAGE
MONITOR
ISSUE 2 – NOVEMBER 1995
DEVICE DESCRIPTION
The ZM33164 is a three terminal under
vo l ta ge mo ni t or ci rc ui t f or use i n
microprocessor systems. The threshold
voltage of the device has been set to 4.3volts
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
ZM33164 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 SO8 and
SOT223 for surface mount requirements.
SCHEMATIC DIAGRAM
4-94
FEATURES
APPLICATIONS
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
4.3 volt threshold for 5 volt logic
60mV hysteresis prevents erratic operation
Microprocessor systems
Computers
Computer peripherals
Instrumentation
Automotive
Battery powered equipment
ZM33164

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zm33164 Summary of contents

Page 1

... SUPPLY VOLTAGE MONITOR ISSUE 2 – NOVEMBER 1995 DEVICE DESCRIPTION The ZM33164 is a three terminal under use i n microprocessor systems. The threshold voltage of the device has been set to 4.3volts 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 ...

Page 2

... Maximum power dissipation, for the SOT223 and SO8 packages, 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 ZM33164 Power Dissipation TO92 SOT223 SO8 =-40 to 85° ...

Page 3

... ZM33164 TYPICAL CHARACTERISTICS 500 400 -40 °C 25 °C 85 °C 300 200 100 Input Voltage (V) Input Current vs. Input Voltage 30 V =4V in -40 °C 25 ° ° 0.4 0.8 1.2 1.6 2.0 Output Saturation Voltage (V) Output Saturation Voltage vs. Sink Current 100 Vin= °C 25 °C 60 -40 °C ...

Page 4

... AAAA AAAA AAAA AAAA Output Undefined APPLICATION CIRCUIT Note 4: A time delayed reset can be accomplished with the additional Cd RCd mpu ZM33164 AAAA AAA AAAA AAA AAAA AAA AAAA AAA AAAA AAA AAAA AAA AAAA AAA AAAA AAA ...

Page 5

... CONNECTION DIAGRAMS SO8 Package Suffix – N8 Top View TO92 Package Suffix – C Bottom View ORDERING INFORMATION Part Number Package ZM33164N8 SO8 ZM33164G SOT223 ZM33164C TO92 SOT223 Package Suffix – G Top View – Pin 4 floating or connected to pin 2 Part Mark ZM33164 ZM33164 ZM33164 4-98 ...

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