DIO6803SST3

Rev 1.2 DIO6803 Ultra Low Power Microprocessor Reset Circuit Features Descriptions  140ms min Reset Pulse Width DIO6803 series are micro-processor (μP)  10μA Typ Supply Current @VCC = 3V supervisory circuits used to monitor the power  Guaranteed Reset Valid to VCC = 1.0V supplies in μP and digital systems. They provide  Temperature coefficient of reset threshold: excellent circuit reliability and low cost by 21ppm/°C eliminating external components.  Power Supply Transient Immunity  Operating Temperature Range: These circuits perform a single function: they -40°C to 125°C assert a reset signal whenever the VCC supply Available in SOT23 and SOT23-3 voltage  declines below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. Pin Assignment The DIO6803 has Open drain outputs. The DIO6803 has an active-low /RESET output, Thereset comparator is designed to ignore fast transients on VCC, and the outputs are guaranteed to be in the correct logic state for VCC down to 1.0V over the temperature range. The device is available in 3 pin SOT23 and SOT23-3 packages. (Top View) Applications  Computers  Controllers  Intelligent Instruments  Portable/Battery-Powered Equipment Ordering Information Order Part TA Number Package DIO6803XST3 RoHS -40 to 125°C SOT23 Tape & Reel, 3000 DIO6803XSU3 RoHS -40 to 125°C SOT23-3 Tape & Reel, 3000 www.dioo.com © 2019 DIOO MICROCIRCUITS CO., LTD DIO6803• Rev. 1.2 DIO6803 Ordering Code = Part No. + Package Code ST3: Stands for SOT23 SU3: stands for SOT23-3 X: Refer to Device Function Reference Table on Page 2 Device Function Reference Table Part No. Reset threshold Reset active Low or High Output Type Marking DIO6803RST3 2.63V Low Open Drain ABD DIO6803RSU3 2.63V Low Open Drain ABD DIO6803SST3 2.93V Low Open Drain ABC DIO6803SSU3 2.93V Low Open Drain ABC Block Diagram OSC VCC /RESET 1.25V COMP Delay Generator GND Figure 1 Block Diagram www.dioo.com © 2019 DIOO MICROCIRCUITS CO., LTD DIO6803• Rev. 1.2 Ultra Low Power Microprocessor Reset Circuit Ordering Information Complimentary Note DIO6803 Symbol /RESET GND VCC Description Open Drain output. This output remains low if VCC drops below VRES-VHYST, and for at least 140ms after VCC rises above VRES Ground terminal Analog input. This pin is both the power supply to internal circuit and the voltage to be monitored Absolute Maximum Ratings Stresses beyond those listed under “Absolute Maximum Rating” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other condition beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Parameter Rating VCC -0.3 to 6.0 /RESET -0.3 to 6.0 Terminal Voltage (With respect to GND) V VCC 20 /RESET 20 mA Input Current Thermal Resistance Operating Temperature Lead Temperature Range (soldering 10s) Storage Temperature ESD HBM, JEDEC: JESD22-A114 www.dioo.com Units 300 °C/W -40 to 125 °C 300 °C -65 to 150 °C 4500 V © 2019 DIOO MICROCIRCUITS CO., LTD DIO6803• Rev. 1.2 Ultra Low Power Microprocessor Reset Circuit Pin Descriptions DIO6803 Typical value: VCC=3V, TA=25°C, unless otherwise noted. Parameters Symbol Maximum input voltage VCCMAX Minimum input voltage VCCMIN Supply current Reset Threshold Temperature coefficient of reset threshold Reset Threshold hysteresis IVCC Test Conditions Min Typ Max Unit 5.5 V 1.0 V Vcc=2.0V 8 Vcc=3.0V 10 Vcc=5.0V 14 uA DIO6803S 2.75 2.93 3.05 DIO6803R 2.53 2.63 2.73 VRES V ppm/° TC 21 VHYST 0.03VRES V 23 us VCC transitions from VRES+0.1V to VCC to /RESET Delay VRES-0.1V /RESET Output Voltage Low VOL Reset Pulse Width TRES VCC=2V, VRES>2V, ISINK=1.5mA 140 240 C 0.3 V 500 ms Specifications subject to change without notice. Detailed Description A microprocessor’s (μP’s) reset input starts the μP in a known state. The DIO6803 series assert reset to prevent code-execution errors during power-up, power-down, or brownout conditions. The device consists of a comparator, a low current high precision voltage reference, voltage divider, output delay circuit and output driver. They assert a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. The DIO6803 has an open drain output stage. The DIO6803 have an active-low /RESET output, The reset comparator is designed to ignore fast transients on VCC, and the outputs are guaranteed to be in the correct logic state for VCCdown to 1.0V over the temperature range. The operation of the device can be best understood by referring to figure 2. www.dioo.com © 2019 DIOO MICROCIRCUITS CO., LTD DIO6803• Rev. 1.2 Ultra Low Power Microprocessor Reset Circuit DC Electrical Characteristics DIO6803 Applications Information Negative-Going VCC Transients In addition to issuing a reset to the μP during power-up, power-down, and brownout conditions, the DIO6803 series are relatively immune to short-duration negative-going VCCtransients (glitches). As the magnitude of the transient increases (goes farther below the reset threshold), the maximum allowable pulse width decreases. Typically, a VCCtransient that goes 100mV below the reset threshold and lasts 10μs or less will not cause a reset pulse. A 0.1μF bypass capacitor mounted as close as possible to the VCC pin provides additional transient immunity. Typical Performance Characteristics All typical value: VCC=5V, TA=25°C, unless otherwise specified. www.dioo.com © 2019 DIOO MICROCIRCUITS CO., LTD DIO6803• Rev. 1.2 Ultra Low Power Microprocessor Reset Circuit Figure 2 Timing Waveform DIO6803 E B K D H Symbol Min Max A 2.70 3.10 B 1.10 1.50 C 1.0 Typical D 0.4 Typical E 0.35 0.48 G 1.80 2.00 H 0.02 0.1 J K www.dioo.com Dimensions In Millimeters 0.1 Typical 2.20 2.60 © 2019 DIOO MICROCIRCUITS CO., LTD DIO6803• Rev. 1.2 Ultra Low Power Microprocessor Reset Circuit Physical Dimensions: SOT23 DIO6803 Ultra Low Power Microprocessor Reset Circuit Physical Dimensions: SOT23-3 Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 1.050 1.250 0.041 0.049 A1 0.000 0.100 0.000 0.004 A2 1.050 1.150 0.041 0.045 b 0.300 0.500 0.012 0.020 c 0.100 0.200 0.004 0.008 D 2.820 3.020 0.111 0.119 E 1.500 1.700 0.059 0.067 E1 2.650 2.950 0.104 0.116 Symbol e www.dioo.com 0.950 TYP. 0.037 TYP. e1 1.800 2.000 0.071 0.079 L 0.300 0.600 0.012 0.024 Θ 0° 8° 0° 8° © 2019 DIOO MICROCIRCUITS CO., LTD DIO6803• Rev. 1.2 DIO6803 Dioo is a professional design and sales corporation for high-quality and performance analog semiconductors. The company focuses on industry markets, such as, cell phone, handheld products, laptop, and medical equipment and so on. Dioo’s product families include analog signal processing and amplifying, LED drivers and charger IC. Go to http://www.dioo.com for a complete list of Dioo product families. For additional product information, or full datasheet, please contact with our Sales Department or Representatives. www.dioo.com © 2019 DIOO MICROCIRCUITS CO., LTD DIO6803• Rev. 1.2 Ultra Low Power Microprocessor Reset Circuit CONTACT US