ZM33164 [ZETEX]
SUPPLY VOLTAGE MONITOR; 电源电压监控器
| 型号： | ZM33164 |
| 厂家： | 
ZETEX SEMICONDUCTORS |
| 描述： | SUPPLY VOLTAGE MONITOR |
| 文件： | 总5页 (文件大小：134K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SUPPLY VOLTAGE
MONITOR
ZM33164
ISSUE 2 – NOVEMBER 1995
DEVICE DESCRIPTION
FEATURES
The ZM33164 is a three terminal under
voltage monitor circuit for use in
microprocessor systems. The threshold
voltage of the device has been set to 4.3volts
making it ideal for 5 volt circuits.
SO8, SOT223 and TO92 packages
Power on reset generator
Automatic reset generation
Low standby current
•
•
•
•
•
•
•
Guaranteed operation from 1 volt
Wide supply voltage range
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.
Internal clamp diode to discharge delay
capacitor
4.3 volt threshold for 5 volt logic
•
•
60mV hysteresis prevents erratic operation
APPLICATIONS
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.
Shouldthesupplyvoltage, onceestablished,
at any time drop below the threshold level
then the output again will pull low.
Microprocessor systems
•
Computers
•
Computer peripherals
•
Instrumentation
•
Automotive
•
Battery powered equipment
•
The device is available in a TO92 package for
through hole applicationsaswell asSO8 and
SOT223 for surface mount requirements.
SCHEMATIC DIAGRAM
4-94
ZM33164
ABSOLUTE MAXIMUM RATING
Input Supply Voltage
-1 to 12V
12V
Power Dissipation
TO92
Offstate Output Voltage
780mW
Onstate Output
SOT223
SO8
2W(Note 2)
780mW(Note 2)
Sink Current(Note 1)
Internally limited
100mA
Clamp diode
Forward Current(Note 1)
Operating junction
temperature
150°C
Operating Temperature
Storage Temperature
TEST CONDITIONS
-40 to 85°C
-65 to 150°C
(T
=25°C for typical values, T
=-40 to 85°C for min/max values (Note3))
amb
amb
COMPARATOR
MIN
TYP.
MAX.
PARAMETER
SYMBOL
UNITS
V
Threshold Voltage
High state output (Vcc increasing)
VIH
4.15
4.33
4.45
Threshold Voltage
Low state output (Vcc decreasing)
VIL
VH
4.15
0.02
4.27
0.06
4.45
V
V
Hysteresis
OUTPUT
Output sink saturation:
(Vcc=4.0V, Isink=8.0mA)
(Vcc=4.0V, Isink=2.0mA)
(Vcc=1.0V, Isink=0.1mA)
VOL
0.46
0.15
1.0
0.4
0.25
50
V
V
V
Onstate output sink current
(Vcc , Output=4V)
Isink
Ioh
Vf
10
20
mA
Offstate output leakage current
(Vcc , Output=5V)
0.02
1.2
2.0
0.5
1.5
µA
V
Clamp diode forward voltage
(If=10mA)
0.6
Propagation delay
Td
µs
(Vin 5V to 4V, Rl=10k, Tamb=25°C)
TOTAL DEVICE
Operating input voltage range
Vcc
Iq
1.0 to 10
V
Quiescent input current (Vcc=5V)
175
260
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
close to ambient as possible
4-95
ZM33164
TYPICAL CHARACTERISTICS
500
400
300
200
100
10
RL=10K
TA=25 °C
8
-40 °C 25 °C 85 °C
6
4
2
0
0
2
4
6
8
10
0
2
4
6
10
8
Input Voltage (V)
Input Voltage (V)
Input Current vs. Input Voltage
Output Voltage vs. Input Voltage
30
20
10
RL =10K
Vin=4V
5
-40 °C
4
25 °C
85 °C
Ϸ
Ϸ
4
2
0
0
3
-1
0
1
2
4
0
0.4
0.8
1.2
1.6
2.0
µ
Time ( S)
Output Saturation Voltage (V)
Output Saturation Voltage vs. Sink Current
Reset Delay Time
100
Vin=0V
4.34
4.32
4.30
4.28
Upper Threshold
80
85 °C
25 °C
60
-40 °C
40
20
0
Lower Threshold
4.26
4.24
0
0.4
0.8
1.2
1.6
2.0
-40
0
20
80
-20
40
60
Temperature ( °C)
Forward Voltage (V)
Threshold Voltage vs. Temperature
Clamp Diode Forward Current vs. Voltage
4-96
ZM33164
TIMING DIAGRAM
Vcc
Threshold
Voltage
1 V
Output
Output
Output
Undefined
Undefined
APPLICATION CIRCUIT
Note 4: A time delayed reset can be accomplished with the additional Cd.
1
TDY = RCd ln
TDY =Time (Seconds)
VTH =Microprocessor Reset Threshold
Vin =Power Supply Voltage
VTH(mpu )
1 −
Vin
4-97
ZM33164
CONNECTION DIAGRAMS
SO8 Package Suffix – N8
SOT223 Package Suffix – G
Top View
Top View –
Pin 4 floating or connected to pin 2
TO92 Package Suffix – C
Bottom View
ORDERING INFORMATION
Part Number
ZM33164N8
ZM33164G
ZM33164C
Package
SO8
Part Mark
ZM33164
ZM33164
ZM33164
SOT223
TO92
4-98
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