HT70XXA-1
TinyPower TM Voltage Detector
Selection Table
Part No.Detectable Voltage Hysteresis Width Tolerance Package
Marking
HT7022A-1 2.2V 0.11V ±3%TO-92SOT-89SOT-25
70XXA-1(for TO-92)70XXA-1(for SOT-89)0XXA (for SOT-25)
HT7024A-1 2.4V 0.12V ±3%HT7027A-1 2.7V 0.135V ±3%HT7033A-1 3.3V 0.165V ±3%HT7039A-1 3.9V 0.195V ±3%HT7044A-1 4.4V 0.22V ±3%HT7050A-1 5.0V
0.25V
±3%
Note:recruited
²XX ²stands for output voltages.
For lead free devices,TO-92package will add a ²#²mark at the end of the date code,whereas SOT-89&SOT-25packages will add a ²#²mark at the end of the marking.
Rev.1.401January 26,2006
General Description
The HT70XXA-1ries devices area t of three terminal low power voltage detectors implemented in CMOS technology.Each voltage detector in the ries detects a particular fixed voltage ranging from 2.2V to 5V.The voltage detectors consist of a high-precision and low power consumption standard voltage source as well as a
comparator,hysteresis circuit,and an output driver.CMOS technology ensures low power consumption.Although designed primarily as fixed voltage detectors,the devices can be ud with external components to detect ur specified threshold voltages.
Features
·Low power consumption ·Low temperature coefficient ·High input voltage range (up to 24V)
·Output voltage accuracy:tolerance ±3%
·Built-in hysteresis characteristic ·TO-92,SOT-89and SOT-25package
Applications
·Battery checkers ·Level lectors ·Power failure detectors
·Microcomputer ret ·Battery memory backup
·Non-volatile RAM signal storage protectors
Block Diagram
N Channel Open Drain Output(Normal Open;Active Low)
Output Table&Curve
V DD V DD>V DET(+)V DD£V DET(-)
V OUT Hi-Z VSS
Pin Assignment
Rev.1.402January26,2006
高中数列>如何制作收纳盒Absolute Maximum Ratings
V SS-0.3V to V SS+26V V SS-0.3V to V DD+0.3V
叠青蛙
员工转正申请书怎么写.......................................50mA -50°C to125°C 200mW -40°C to85°C
Note:The are stress ratings only.Stress exceeding the range specified under²Absolute Maximum Ratings²may cau substantial damage to the device.Functional operation of this device at other conditions beyond tho listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.
Electrical Characteristics
HT7022A-1Ta=25°C
HT7024A-1Ta=25°C
Rev.1.403January26,2006
HT7033A-1Ta=25°C
HT7039A-1Ta=25°C
Rev.1.404January26,2006
HT7050A-1Ta=25°C
Rev.1.40
5
January 26,2006
Functional Description
宜宾市天气预报The HT70XXA-1ries is a t of voltage detectors equipped with a high stability voltage reference which is connected to the negative input of a comparator ¾denoted as V REF in the following figure for NMOS output voltage detector.
When the voltage drop to the positive input of the comparator (i,e,V B )is higher than V REF ,VOUT goes high,M1turns off,and V B is expresd as V BH =V DD ´(R B +R C )/(R A +R B +R C ).If V DD is decread so that V B falls to a value less than V REF ,the comparator output inverts from high to low,V OUT goes low,V C is high,M1turns on,RC is bypasd,and V B becomes:V BL =V DD ´R B /(R A +R B ),which is less than V BH.By so doing,the comparator output will stay low to prevent the circuit from oscillating when V B »V REF .
If V DD falls below the minimum operating voltage,the output becomes undefined.When VDD goes from low to V DD ´R B /(R A +R B )>V REF ,the comparator output and V OUT goes high.
The detectable voltage is defined as:
V DET (-)=
R +R +R R +R A B C
B C
´V REF The relea voltage is defined as:
V DET (+)=
R +R R A B
夜晚造句B ´V REF The hysteresis width is:
V HYS =V DET (+)-V DET (-)
The figure demonstrates the NMOS output type with positive output polarity (V OUT is normally open,active low).The HT70XXA-1ries also supplies options for other output types with active high outputs.Application circuits shown
共享汽车app
are examples of positive output polarity (normally open,active low)unless otherwi specified.
NMOS Output Voltage Detector (HT70XXA-1)
