ZM33064CL - Zetex Semiconductors - Datasheet.Directory

Issue 4 - July 2006

SUPPLY VOLTAGE

MONITOR

ISSUE 4 - JULY 2006

ZM33064

SCHEMATIC DIAGRAM

DEVICE DESCRIPTION

The ZM33064 is a three terminal under

voltage monitor circuit for use in

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

ZM33064 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.

FEATURES

•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

APPLICATIONS

•Microprocessor systems

•Computers

•Computer peripherals

•Instrumentation

•Automotive

•Battery powered equipment

Issue 4 - July 2006 www.zetex.com

TEST CONDITIONS

(Tamb=25°C for typical values, Tamb=-40 to 85°C for min/max values (Note3))

COMPARATOR

PARAMETER SYMBOL MIN TYP. MAX. UNITS

Threshold Voltage

High state output (Vcc increasing)

Low state output (Vcc decreasing)

VIH

VIL

4.5

4.61

4.59

4.7

V

Hysteresis VH0.01 0.02 0.05 V

OUPUT

PARAMETER SYMBOL MIN TYP. MAX. UNITS

Output sink saturation: VOL

(Vcc=4.0V, Isink=8.0mA) 0.46 1.0 V

(Vcc=4.0V, Isink=2.0mA) 0.15 0.4 V

(Vcc=1.0V, Isink=0.1mA) 0.25 V

Onstate output sink current

(Vcc , Output=4V)

Isink 10 20 60 mA

Offstate output leakage current

(Vcc , Output=5V)

Ioh 0.02 0.5 µA

Clamp diode forward voltage

(If=10mA)

Vf0.6 1.2 1.5 V

Propagation delay

(Vin 5V to 4V, Rl=10k, Tamb=25°C)

Td1.5 µs

TOTAL DEVICE

PARAMETER SYMBOL MIN TYP. MAX. UNITS

Operating input voltage range Vcc 1.0 to 6.5 V

Quiescent input current (Vcc=5V) Iq135 200 µA

Note:

1. Maximum package power dissipation must be observed

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

ZM33064

ABSOLUTE MAXIMUM RATING

Input Supply Voltage -1 to 10V

Offstate Output Voltage 10V

Onstate Output

Sink Current(Note 1) Internally limited

Clamp diode

Forward Current(Note 1) 100mA

Operating junction

temperature 150°C

Operating Temperature -40 to 85°C

Storage Temperature -65 to 150°C

Power Dissipation

TO92 780mW

SOT223 2W(Note 2)

SO8 780mW(Note 2)

Issue 4 - July 2006 www.zetex.com

ZM33064

TYPICAL CHARACTERISTICS

0246810

-40 °C 25 °C 85 °C

100

200

400

300

500

02

0 0.8 1.6 2.00.4 1.2

0

10

20

30

Sink Current (mA)

-40 °C

25 °C

85 °C

00.4 2.00.8 1.2 1.6

0

40

60

80

20

-40 °C

25 °C

46810

2

4

6

8

10

0

Output Voltage (V)

01234

2

4

0

Vin (V)

4

5

-40 -20 02040 60 80

4.70

4.65

4.60

4.55

4.50

Temperature ( °C)Forward Voltage (V)

Threshold Voltage (V)

Forward Current (mA) Input Current (µA)

Input Voltage

Upper Threshold

Lower Threshold

Input Current vs. Input Voltage Output Voltage vs. Input Voltage

Output Saturation Voltage vs. Sink Current Reset Delay Time

Clamp Diode Forward Current vs. Voltage Threshold Voltage vs. Temperature

Input Voltage

Output Saturation Voltage (V)

Vout (V)

(V) (V)

Time (µs)

0

100

RL=10K

TA=25 ° C

RL=10K

''

Vin=4V

Vin=0V

85 °C

Issue 4 - July 2006 www.zetex.com

AAAA

AAA

Vcc

Threshold

Voltage

1 V

Output

Undefined Output

Undefined

Output

Note 4: A time delayed reset can be accomplished with the additional Cd.

T

DY

=

RCd

ln







1

1 −

V

TH

(

mpu

)

V

in









TIMING DIAGRAM

APPLICATION CIRCUIT

TDY =Time (Seconds)

VTH =Microprocessor Reset Threshold

Vin =Power Supply Voltage

ZM33064

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Issue 4 - July 2006 www.zetex.com

SO8 Package Suffix – N8

Top View

SOT223 Package Suffix – G

Top View –

Pin 4 floating or connected to pin 2

CONNECTION DIAGRAMS

ORDERING INFORMATION

Part Number Package Part Mark

ZM33064N8 SO8 ZM33064

ZM33064G SOT223 ZM33064

ZM33064C TO92 ZM33064

TO92 Package Suffix – C

Bottom View –

ZM33064