ME2801A33M3G

ME2801 Voltage Detectors , ME2801 Series General Description Features ME2801 Series are highly precise , low power consumption voltage detectors,manufactured using CMOS technologies. Detect voltage is extremely accurate with minimal temperature drift.CMOS output configurations are available. l Highly accuracy： ±1% l Low power consumption：TYP 0.7uA (Vin=1.5V) l Detect voltage range：2.0V~4.8V in 0.1V increments l Operating voltage range：0.7V~7V l Detect voltage temperature characteristics： TYP±100ppm/℃ Selection Guide l Output configuration： CMOS l Package： SOT-23-3，SOT-89-3，TO-92 Typical Application l Microprocessor reset circuitry l Memory battery back-up circuits l Power-on reset circuits l Power failure detection Typical Application Circuit V03 www.microne.com.cn Page 1 of 9 ME2801 Pin Configuration TO-92 SOT-23-3 SOT-89-3 Pin Assignment ME2801AXX/ME2801BXX Pin Number SOT-23-3 SOT-89-3 TO-92(T) TO-92(T1) 2 1 3 3 1 2 3 1 2 2 3 1 Pin Name Functions GND VOUT VIN Ground Output Voltage Input Voltage Block Diagram Absolute Maximum Ratings PARAMETER SYMBAL RATINGS UNITS VIN Input Voltage VIN 8 V Output Current Iout 50 mA CMOS Output Voltage Vout N-ch open drain Continuous Total Power Dissipation Vss-0.3~Vin+0.3 SOT-23-3 SOT-89-3 V Vss-0.3~12 150 Pd 500 TO-92 mW 300 Operating Ambient Temperature TOpr -40~+85 ℃ Storage Temperature Tstg -40~+125 ℃ Soldering temperature and time Tsolder 260℃, 10s V03 www.microne.com.cn Page 2 of 9 ME2801 Electrical Characteristics (VDF(S)=2.0V to 4.8V±1% ,Ta=25OC ,unless otherwise noted) Parameter VDF VHYS Iss VIN Symbol Conditions Detect Voltage VDF(S)*0.99 Hysteresis Typ. VDF(S) Max. Units VDF(S)*1.01 V V VDF*0.02 VDF*0.05 VDF*0.08 Vin=1.5V - 0.7 2.7 Vin=2.0V - 0.8 3.2 Vin=3.0V - 0.9 3.6 Vin=4.0V - 1.0 3.8 Vin=5.0V - 1.1 4.3 0.7 - 7 VIN=1.0V 1.0 2.2 =2.0V 3.0 7.7 =3.0V 5.0 10.1 =4.0V 6.0 11.5 =5.0V 7.0 13.0 Range Supply Current Min. Operating VDF(T)=1.6V to Voltage 6.0V uA V N-ch，VDS=0.5V IOUT Output Current P-ch，VDS=2.1V VIN=8.0V ΔVDF/(Δtopr*VDF) Temperature characteristics -40℃≤Topr≤85℃ -10.0 ±100 mA -2.0 mA ppm/℃ Note： 1、VDF(S) ：Specified Detection Voltage value 2、VDF ：Actual Detection Voltage value 3、Release Voltage：VDR=VDF+VHYS (ME2801A 系列) VDR=VDF-VHYS (ME2801B 系列) V03 www.microne.com.cn Page 3 of 9 ME2801 Functional Description： 1、 When input voltage (VIN) rises above detect voltage (VDF), output voltage (VOUT) will be equal to VIN. 2、 When input voltage (VIN) falls below detect voltage (VDF), output voltage (VOUT) will be equal to the ground voltage (VSS) level. 3、 When input voltage (VIN) falls to a level below that of the minimum operating voltage (VMIN), output will become unstable. In this condition, VIN will equal the pulled-up output ( should output be pulled-up.) 4、 When input voltage (VIN) rises above the ground voltage (VSS) level, output will be unstable at levels below the minimum operating voltage (VMIN). Between the VMIN and detect release voltage (VDR) levels, the ground voltage (VSS) level will be maintained. 5、 When input voltage (VIN) rises above detect release voltage (VDR), output voltage (VOUT) will be equal to VIN. 6、 The difference between VDR and VDF represents the hysteresis range. Timing Chart： ME2801AXX: ME2801BXX: V03 www.microne.com.cn Page 4 of 9 ME2801 Directions for use： 1、 Please use this IC within the stated maximum ratings. Operation beyond these limits may cause degrading or permanent damage to the device. 2、When a resistor is connected between the VIN pin and the input with CMOS output configurations, oscillation may occur as a result of voltage drops at RIN if load current(IOUT) exists.(refer to the Oscillation Description(1) below) 3、When a resistor is connected between the VIN pin and the input with CMOS output configurations, oscillation may occur as a result of through current at the time of voltage release even if load current(IOUT ) does not exist. (refer to the Oscillation Description(2) below) 4、With a resistor connected between the VIN and the input, detect and release voltage will rise as a result of the IC’s supply current flowing through the VIN pin. 5、In order to stabilize the IC’s operations, please ensure that VIN pin’s input frequency’s rise and fall times are more than several u Sec/V. Oscillation Description： 1、 Output current oscillation with the CMOS output configuration When the voltage applied at IN rises, release operations commence and the detector’s output voltage increase. Load current(IOUT) will flow at RL. Because a voltage drop(RIN*IOUT) is produces at the RIN resistor, located between the input(IN) and the VIN pin. The load current will flow via the IC’s pin. The voltage drop will also lead to a fall in the voltage level at the VIN pin. When the VIN pin voltage level falls below the detect voltage level, detect operations will commence. Fllowing detect operations, load current flow will cease and since voltage drop at RIN will disapper, the voltage level at the VIN pin will rise and release operations will begin over again. Oscillation may occur with this “release-detect-release” repetition. Futher, this condition will also appear via means of a similar mechanism during detect operations. 2、 Oscillation as a result of through current Since the ME2801 series are CMOS IC’s, through current will flow when the IC’s internal circuit switching operates(during release and detect operations). Consequently, oscillation is liable to occur as a result of drops in voltage at the through current’s resistor(RIN) during release voltage operations.(refer to diagram 2) since hysteresis exists during detect operations, oscillation is unlikely to occur. V03 www.microne.com.cn Page 5 of 9 ME2801 Type Characteristics 1、 SUPPLY CURRENT VS. INPUT VOLTAGE 2、 DETECT,RELEASE VOLTAGE VS. AMBIENT TEMPERATURE 3、 OUTPUT VOLTAGE VS. INPUT VOLTAGE V03 www.microne.com.cn Page 6 of 9 ME2801 Package Information SOT-89-3 SOT-23-3 V03 www.microne.com.cn Page 7 of 9 ME2801 TO-92 V03 www.microne.com.cn Page 8 of 9 ME2801 l l l l l V03 The information described herein is subject to change without notice. Nanjing Micro One Electronics Inc is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. The application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Nanjing Micro One Electronics Inc is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Nanjing Micro One Electronics Inc. Although Nanjing Micro One Electronics Inc exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may occur. The user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue. www.microne.com.cn Page 9 of 9