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ZM331643GTA

P1-P3P4-P5
Issue 4 - July 2006
© Zetex Semiconductors plc 2006
SUPPLY VOLTAGE
MONITOR
ISSUE 4 – JULY 2006
ZM33164-3
DEVICE DESCRIPTION
The ZM33164-3 is a three terminal under
voltage monitor circuit for use in
microprocessor systems. The threshold
voltage of the device has been set to 2.68
volts making it ideal for 3 volt circuits.
Included in the device is a precise voltage
reference and a comparator with built in
hysteresis to prevent erratic operation. The
ZM33164-3 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.
FEATURES
•
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
•
2.68 volt threshold for 3 volt logic
•
60mV hysteresis prevents erratic operation
APPLICATIONS
•
Microprocessor systems
•
Computers
•
Computer peripherals
•
Instrumentation
•
Automotive
•
Battery powered equipment
SCHEMATIC DIAGRAM
4-99
Issue 4 - July 2006 www.zetex.com
© Zetex Semiconductors plc 2006
0246810
-40 °C 25 °C 85 °C
100
200
400
300
500
01
00.8 1.62.00.4 1. 2
0
20
40
50
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
85 °C
25 °C
V
in
=
0V
2 345
1
2
3
4
5
0
Output Voltage (V)
012
3
4
2
4
0
Vin
(V)
2.4
3.0
-40
-20 0 20 40 60 80
2.69
2.67
Temperature ( °C)Forward Voltage (V)
Threshold Voltage (V)
Forward Current (mA)
Input Current (
µ
A)
Input Voltage (V)
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 (V)
Output Saturation Voltage (V)
Vout
(V)
Time ( µs)
0
30
10
100
100
2.71
2.73
2.75
2.77
2.65
RL=10K
T
A=25 °C
R
L=10K
Vin=2.4V
ZM33164-3
TYPICAL CHARACTERISTICS
4-101
Issue 4 - July 2006 www.zetex.com
© Zetex Semiconductors plc 2006
TEST CONDITIONS
(T
amb
=25°C for typical values, T
amb
=-40 to 85°C for min/max values (Note3))
COMPARATOR
PARAMETER SYMBOL
MIN TYP. MAX.
UNITS
Threshold Voltage
High state output (Vcc increasing) V
IH
2.55 2.71 2.8 V
Threshold Voltage
Low state output (Vcc decreasing) V
IL
2.55 2.65 2.8 V
Hysteresis V
H
0.03 0.06 0.15 V
OUTPUT
Output sink saturation: V
OL
(V
cc
=2.4V, I
sink
=8.0mA) 0.46 1.0 V
(V
cc
=2.4V, I
sink
=2.0mA) 0.15 0.4 V
(V
cc
=1.0V, I
sink
=0.1mA) 0.25 V
Onstate output sink current
(V
cc
, Output=2.4V)
I
sink
10 20 60 mA
Offstate output leakage current
(V
cc
, Output=3V)
I
oh
0.02 0.5
µA
Clamp diode forward voltage
(I
f
=10mA)
V
f
0.61.21.5V
Propagation delay
(V
in
3V to 2.4V, R
l
=10k, T
amb
=25°C)
T
d
2.5
µs
TOTAL DEVICE
Operating input voltage range V
cc
1.0 to 10 V
Quiescent input current (V
cc
=3V) I
q
125 190
µA
ZM33164-3
ABSOLUTE MAXIMUM RATING
Input Supply Voltage -1 to 12V
Offstate Output Voltage 12V
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)
4-100
P1-P3P4-P5

ZM331643GTA

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Supervisory Circuits 2.68V
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