APX803_D DIODES | Alldatasheet

Document overview

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  • PDF pages: 11

Technical content

Features

  • Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power-Supply Voltages
  • Fully Specified Over Temperature
  • Open-drain RESET Active Low
  • Power-On/power supply glitch Reset Pulse
  • APX803D 2ms (Typ)
  • APX803 200ms (Typ)
  • 30µA Supply Current (Typ.)
  • Guaranteed Reset Valid to VCC = +1V
  • No External Components
  • SOT23 and SOT23R: Available in “Green” Molding Compound (No Br, Sb)
  • Lead Free Finish/ RoHS Compliant (Note 1)

Applications

  • Computers
  • Controllers
  • Intelligent Instruments
  • Critical µP and µC Power Monitoring
  • Portable/Battery Powered Equipment Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html.

3-PIN MICROPROCESSOR RESET CIRCUIT APX803 Document number: DS32132 Rev. 2 - 2 2 of 11 www.diodes.com September 2010 © Diodes Incorporated Typical Application Circuit APX803 GND RESET V CC Microprocessor V CC GND RESET INPUT VCC CIN 100nF Pin Descriptions Functional Block Diagram VREF Delay timeOscillator RESET APX803/D VCC VREF Delay timeOscillator RESETRESET APX803/D VCC Pin Name Description GND Ground RESET Reset Output Pin Active Low Open Drain VCC Operating Voltage Input

3-PIN MICROPROCESSOR RESET CIRCUIT APX803 Document number: DS32132 Rev. 2 - 2 3 of 11 www.diodes.com September 2010 © Diodes Incorporated Absolute Maximum Ratings Symbol Parameter Rating Unit ESD HBM Human Body Model ESD Protection 2 kV ESD MM Machine Model ESD Protection 200 V VCC Supply Voltage -0.3 to +6.0 V VRESET RESET (open drain) -0.3 to 6 V ICC Input Current, V CC 20 mA IO Output Current, RESET 20 mA PD Continuous Power Dissipation (TA = +70°C), de- rate 4mW/°C above +70°C 400 mW TOP Operating Junction Temperat ure Range -40 to +105 °C TST Storage Temperature Range -65 to +150 °C Recommended Operating Conditions Symbol Parameter Min Max Unit VCC Supply Voltage 1.1 5.5 V VIN Input Voltage 0 (VCC+0.3) V VRESET RESET output voltage 0 5.5 V TA Operating Ambient Temperature Range -40 85 °C dVCC/dt VCC Rate of rise (VCC = 0~VT) 100 V/µs

3-PIN MICROPROCESSOR RESET CIRCUIT APX803 Document number: DS32132 Rev. 2 - 2 4 of 11 www.diodes.com September 2010 © Diodes Incorporated Electrical Characteristics (TA = 25°C) TA= -40 to 85°C unless otherwise note. Typical values are at TA=+25 °C. Symbol Parameter Test Conditions Min Typ. Max Unit ICC Supply Current VTH + 0.2V 30 40 μA VTH Reset Threshold APX803-23 TA = 25oC 2.21 2.25 2.30 V APX803-26 2.59 2.63 2.66 APX803-29 2.89 2.93 2.96 APX803D-29 2.89 2.93 2.96 APX803-31 3.04 3.08 3.13 APX803-40 3.94 4.00 4.06 APX803-44 4.31 4.38 4.45 APX803-46 4.56 4.63 4.70 Reset Threshold hysteresis V TH-H – VTH-L 40 mV Reset Threshold Tempco 30 ppm/°C tS V CC to RESET delay VCC = VTH to (VTH – 100mV) 20 µs tDELAY Reset Active Timeout Period APX803-XX TA = 0oC to +85oC 140 200 280 ms APX803D-29 1 3.3 VOL T RESEOutput Voltage Low VCC = VTH -0.2, ISINK = 1.2mA 0.3 V VCC = VTH -0.2, ISINK = 3.5mA 0.4 VCC > 1.0V, ISINK = 50uA 0.3 IOH T RESE Output High leakage current VCC > VTH +0.2 1 µA θJA Thermal Resistance Junction-to- Ambient SOT23/SOT23R (Note 2) 201 °C/W θJC Thermal Resistance Junction-to-Case SOT23/SOT23R (Note 2) 56 °C/W Notes: 2. Test condition for SOT23 and SOT23R: Devices mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout. 3. Final datasheet limits to be det ermined by characterization and correlation.

3-PIN MICROPROCESSOR RESET CIRCUIT APX803 Document number: DS32132 Rev. 2 - 2 7 of 11 www.diodes.com September 2010 © Diodes Incorporated Timing Diagram Vth Vth /RESET RESET TDelay TDelay TDelay TDelay Vcc Vth Functional Description Microprocessors (µPs) and microcontrollers (µC) have a reset input to ensure that it starts up in a known state. The APX803/D drive the µP’s reset input to prevent code-execution errors during power-up, power-down, or brownout conditions. They assert a reset signal whenever the V CC supply voltage declines below a preset threshold and keep it asserted for a fixed period of time after VCC has risen above the reset threshold. For the APX803D this period is a minimum of 1ms while for other APX803 variants it is at least 140ms. The APX803/D have an open-drain output stage. Ensuring a Valid Reset Output Down to VCC = 0 RESET is guaranteed to be a logic low for V CC > 1V. Once VCC exceeds the reset threshold, an internal timer keeps RESET low for the reset timeout period; after this interval, RESET goes high. If a brownout condition occurs (V CC dips below the RESET reset threshold), RESET goes low. Any time V CC goes below the reset threshold, the internal timer resets to zero, and RESET goes low. The internal timer starts after V CC returns above the reset threshold, and RESET remains low for the reset timeout period. When V CC falls below 1V, the APX803/D RESET output no longer sinks current — it becomes an open circuit. Therefore, high-impedance CMOS logic inputs connected to RESET can drift to undetermined voltages. This presents no problem in most applications since most µP and other circuitry is inoperative with V CC below 1V. Interfacing to µP with Bidirectional Reset Pins Since the RESET output on the APX803/D is open drain, this device interfaces easily with μP/µC that have bidirectional reset pins, such as the Motorola 68HC11. Connecting the μP supervisor’s RESET output directly to the microcontroller’s (μC’s) RESET pin with a single pull- up resistor allows either device to assert reset. Supervising and monitoring Multiple Supplies Generally, the pull-up resi stor connected to the APX803/D will connect to the supply voltage that is being monitored at the IC’s V CC pin. However, some systems may use the APX803/D open-drain output to level-shift from the monitored supply to reset the µP powered by a different supply voltage or monitor multiple supplies that will be fed into 1 µC/µP reset input.

3-PIN MICROPROCESSOR RESET CIRCUIT APX803 Document number: DS32132 Rev. 2 - 2 8 of 11 www.diodes.com September 2010 © Diodes Incorporated

Ordering Information

7 : Tape & Reel Output type Green G : GreenSA : SOT2346 : 4.63 44 : 4.38 40 : 4.00 31 : 3.08 29 : 2.93 26 : 2.63 23 : 2.25 03 : Active-Low, Open Drain SR : SOT23R APX 8 03 D - 29 XX G - 7 Voltage Package Packing 7 : Tape & Reel Output type Green G : GreenSA : SOT2303 : Active-Low, Open Drain SR : SOT23R 29 : 2.93 Device Package Code Packaging (Note 4) 7” Tape and Reel Quantity Part Number Suffix APX803-XXSAG-7 SA SOT23 3000/Tape & Reel -7 APX803-XXSRG-7 SR SOT23R 3000/Tape & Reel -7 APX803D-29SAG-7 SA SOT23 3000/Tape & Reel -7 APX803D-29SRG-7 SR SOT23R 3000/Tape & Reel -7 Notes: 4. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.

3-PIN MICROPROCESSOR RESET CIRCUIT APX803 Document number: DS32132 Rev. 2 - 2 9 of 11 www.diodes.com September 2010 © Diodes Incorporated Marking Information (1) SOT23 and SOT23R 1 2 XX Y W X ( Top View ) XX : Identification code W : Week : A~Z : 1~26 week; X : A~Z : Green Y : Year 0~9 a~z : 27~52 week; z represents 52 and 53 week Device Package Identification Code APX803-46SA SOT23 V3 APX803-44SA SOT23 V4 APX803-40SA SOT23 V5 APX803-31SA SOT23 V6 APX803-29SA SOT23 V7 APX803-26SA SOT23 V8 APX803-23SA SOT23 V9 APX803-46SR SOT23R S3 APX803-44SR SOT23R S4 APX803-40SR SOT23R S5 APX803-31SR SOT23R S6 APX803-29SR SOT23R S7 APX803-26SR SOT23R S8 APX803-23SR SOT23R S9 APX803D-29SA SOT23 VN APX803D-29SR SOT23R SN

3-PIN MICROPROCESSOR RESET CIRCUIT APX803 Document number: DS32132 Rev. 2 - 2 10 of 11 www.diodes.com September 2010 © Diodes Incorporated Package Outline Dimensions (All Dimensions in mm) (1) Package Type: SOT23 and SOT23R Notes: 5. Package outline dimensions as shown on Diodes Inc. package outline dimensions document AP02002, which can be found on our website at http://www.diodes.com/datasheets/ap02002.pdf

3-PIN MICROPROCESSOR RESET CIRCUIT APX803 Document number: DS32132 Rev. 2 - 2 11 of 11 www.diodes.com September 2010 © Diodes Incorporated IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries rese rve the right to make modifications, enhanc ements, improvements, corrections or ot her changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liabi lity arising out of the application or use of this document or an y product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of othe rs. Any Customer or user of this document or products desc ribed herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability what soever in respect of any prod ucts purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives har mless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. LIFE SUPPORT Diodes Incorporated products are specifica lly not authorized for use as critical co mponents in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support dev ices or systems, and acknowledge and agree that they are solely responsi ble for all legal, regulatory and safety-related requirements concerning their products and any use of Diode s Incorporated products in such safety-cri tical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its repr esentatives against any damages ar ising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2010, Diodes Incorporated www.diodes.com