APX823/APX824/APX825A PROCESSOR SUPERVISORY CIRCUITS Description Pin Assignments The APX823/APX824/APX825A family of supervisors provides circuit initialization and timing supervision, primarily for DSP and processor-based systems. (Top View) RESET During power-on, RESET is asserted when supply voltage VCC becomes higher than 1.1V. Thereafter, the supply voltage supervisor monitors VCC and keeps RESET active as long as VCC remains below the threshold voltage VTH-. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, td starts after VCC has risen above the threshold voltage VTH-. When the supply voltage drops below the threshold voltage VTH-, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage VTH- set by an internal voltage divider. GND 2 MR GND 2 • • • Note: 4 WDI SOT25 (Top View) 6 VCC RESET 1 GND 2 APX825A RESET 3 5 WDI 4 MR SOT26 • • APX824 RESET 3 • • 5 VCC RESET 1 Applications • 4 WDI (Top View) Features • 3 In applications where the input to the WDI pin may be active (transitioning high and low) when the APX823/APX824/APX8 25A asserting RESET the APX823/APX824/APX825A does not return to a non-reset state when the input voltage is above Vt. The product spectrum is designed for supply voltage of 2.5V, 3V, 3.3V and 5V. The circuits are available in a SOT25 and SOT26 packages. The APX823/APX824/APX825A devices are characterized for o o operation over a temperature range of -40 C to 105 C. • APX823 SOT25 The APX823/APX825A devices incorporate a manual reset input, MR . A low level at MR causes RESET to become active. The APX824/APX825A devices include a high-level output RESET. APX823/APX824/APX825A have a watchdog timer that is periodically triggered by a positive or negative transition at WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval, ttout, RESET becomes active for the time period td. This event also reinitializes the watchdog timer. Leaving WDI unconnected disables the watchdog. Power-on reset generator with fixed delay time of 200ms Typ Manual reset input (APX823/APX825A) Reset output available in active-low (APX823/APX824/APX825A), active-high (APX824/APX825A) Supply voltage supervision range 2.5V, 3V, 3.3V, 5V Watchdog timer Supply current of 30μA (Typ.) Temperature range: -40°C to 85°C SOT25 and SOT26: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/RoHS Compliant (Note 1) 5 VCC 1 • • • • • • • Applications Using DSPs, Microcontrollers, or Microprocessors Industrial Equipment Programmable Controls Automotive Systems Portable/Battery-Powered Equipment Intelligent Instruments Wireless Communications Systems Notebook/Desktop Computers 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes. APX823/APX824/APX825A Document number: DS31323 Rev. 4 - 2 1 of 12 www.diodes.com May 2011 © Diodes Incorporated APX823/APX824/APX825A PROCESSOR SUPERVISORY CIRCUITS Typical Application Circuit VCC CIN 100nF VCC RESET RESET APX8XX MR VCC Microprocessor WDI I/O GND GND Pin Descriptions Pin Name GND RESET Description Ground Reset output pin (RESET) VCC Operating voltage input WDI Watchdog input MR Manual reset Functional Block Diagram APX823/APX824/APX825A Document number: DS31323 Rev. 4 - 2 2 of 12 www.diodes.com May 2011 © Diodes Incorporated APX823/APX824/APX825A PROCESSOR SUPERVISORY CIRCUITS Absolute Maximum Ratings (Over operating ambient temperature range, unless otherwise noted)* Symbol Parameter ESD HBM Human Body Model ESD Protection ESD MM Machine Model ESD Protection VCC VRESET Supply Voltage RESET, RESET , MR , WDI ICC Input Current VCC IO Maximum High Output Current Derating Factor Above TA = 25oC o PD Continuous Total Power Dissipation TA = 25 C Power Rating TA = 70oC Power Rating TA = 85oC Power Rating Rating Unit 5 200 KV V 6.0 V -0.3 to (VCC+0.3) V 20 mA 20 mA SOT25 6.2 SOT26 5.8 SOT25 500 SOT26 470 SOT25 SOT26 SOT25 SOT26 220 210 125 120 mW/°C mW mW mW TOP Operating Junction Temperature Range -40 to 105 °C TST Storage Temperature Range -65 to 150 °C * Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolutemaximum-rated conditions for extended periods may affect device reliability. Recommended Operating Conditions Symbol VCC VIN Parameter Min Supply Voltage Input Voltage Max Unit 1.1 5.5 V 0 (VCC+0.3) V 0.7 × VCC - V VIH High-level Input Voltage at MR and WDI VIL Low-level Voltage - 0.3 × VCC V Input Transition Rise and Fall Rate at MR or WDI - 100 ns/V -40 85 - 100 Δt/ΔV TA Operating Ambient Temperature Range TR VCC Rising Time (VCC = 0~VT) APX823/APX824/APX825A Document number: DS31323 Rev. 4 - 2 3 of 12 www.diodes.com o C V/ uS May 2011 © Diodes Incorporated APX823/APX824/APX825A PROCESSOR SUPERVISORY CIRCUITS Electrical Characteristics (Over recommended operating ambient temperature range, unless otherwise noted) Symbol VOH Parameter Test Conditions APX823/APX824/APX825A 29/26/23 VCC= VTH-+0.2V APX823/APX824/APX825A RESET 40/31 VCC= VTH-+0.2V High-level Output Voltage RESET VCC= VTH-+0.2V APX824/APX825A -29/26/23 VCC > 1.8V, APX824/APX825A 46/44/40/31 VCC > 1.8V, APX824/APX825A -29/26/23 VCC= VTH-+0.2V APX824/APX825A -46/44 Low-level Output Voltage Note: Unit 0.8 ×VCC - - V VCC-1.5V - - V 0.8 ×VCC - - V - - 0.4 V - - 0.4 V - - 0.4 V 2.21 2.25 2.30 2.59 2.88 3.02 3.93 4.31 4.56 2.20 2.63 2.93 3.08 4.00 4.38 4.63 2.25 2.69 3.00 3.15 4.08 4.47 4.72 2.30 2.57 2.86 3.00 3.92 4.29 4.54 2.63 2.93 3.08 4.00 4.38 4.63 2.69 3.00 3.15 4.08 4.47 4.72 IOL=1mA VCC= VTH-+0.2V IOL=1.2mA VCC= VTH-+0.2V IOL=3mA VCC= VTH--0.2V IOL=1mA IOL=1.2mA VCC= VTH--0.2V IOL=3mA VCC > 1.1V, IOL=20μA APX823/APX824/APX825A -23 APX823/APX824/APX825A -26 APX823/APX824/APX825A -29 APX823/APX824/APX825A -31 APX823/APX824/APX825A -40 APX823/APX824/APX825A -44 APX823/APX824/APX825A -46 APX823/APX824/APX825A -23 APX823/APX824/APX825A -26 APX823/APX824/APX825A -29 APX823/APX824/APX825A -31 APX823/APX824/APX825A -40 APX823/APX824/APX825A -44 APX823/APX824/APX825A -46 Max IOH = -150μA APX823/APX824/APX825A - VRESET Power-up Reset Voltage (see Note 2) VTH- IOH = -100μA VCC= VTH--0.2V APX823/APX824/APX825A 46/44 Negative-going Input Threshold Voltage (see Note 3) IOH=-120μA APX823/APX824/APX825A 29/26/23 RESET 40/31 Typ. IOH=-30μA APX823/APX824/APX825A –46/44 RESET APX824/APX825A -40/31 VOL IOH=-20μA Min o o TA = 0 C -85 C o o TA= -40 C -85 C V V 2. The lowest supply voltage at which RESET becomes active. TR , VCC > 15μs/V. 3. To ensure best stability of the threshold voltage, a bypass capacitor (ceramic, 0.1μF) should be placed near the supply terminals. APX823/APX824/APX825A Document number: DS31323 Rev. 4 - 2 4 of 12 www.diodes.com May 2011 © Diodes Incorporated APX823/APX824/APX825A PROCESSOR SUPERVISORY CIRCUITS Electrical Characteristics (cont.) Symbol Parameter Test Conditions Min Typ. Max - 50 - Unit APX823/APX824/APX825A -23 Vhys TS APX823/APX824/APX825A -26 APX823/APX824/APX825A -29 APX823/APX824/APX825A -31 APX823/APX824/APX825A -40 APX823/APX824/APX825A -44 APX823/APX824/APX825A -46 Hysteresis at VCC Input Set-up Time IIH(AV) Average Highlevel Input Current IIL(AV) Average Lowlevel Input Current mV - VCC = VTH to (VTH – 100mV) WDI 50 μs 20 WDI=VCC, Time average (dc=88%) - 120 - μA WDI=0.3V, VCC=5.5V time average (dc=12%) - -15 - μA IIH High-level Input Current WDI WDI=VCC - 120 160 μA IIL Low-level Input Current WDI WDI=0.3V, VCC=5.5V - 120 160 μA ICC Supply Current WDI and MR Unconnected, Outputs unconnected VCC = VTH-+0.2V - 30 40 μA - 60 - kΩ 50 - o ppm/ C 5 - pF Internal Pull-up Resistor at MR TC VOUT Temperature Coefficient Ci Input Capacitance at MR , WDI θJA Thermal Resistance Junction-to-Ambient θJC Thermal Resistance Junction-to-Case Note: VI = 0V to 5.5V SOT25 SOT26 SOT25 SOT26 (Note 4) (Note 4) (Note 4) (Note 4) - 161 169 27 28 o C/W o C/W 4. Test condition for SOT25 and SOT26: Devices mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout. APX823/APX824/APX825A Document number: DS31323 Rev. 4 - 2 5 of 12 www.diodes.com May 2011 © Diodes Incorporated APX823/APX824/APX825A PROCESSOR SUPERVISORY CIRCUITS Timing Requirements (@ RL = 1mΩ, CL = 50pF, TA = 25°C) Symbol tW Parameter Pulse Width at MR at WDI Test Conditions Min Typ. Max Unit VCC> VTH-+0.2V, VIL=0.3 × VCC, VIH=0.7 × VCC 100 - - ns VCC> VTH-+0.2V, VIL=0.3 × VCC, VIH=0.7 × VCC 50 - - ns Switching Characteristics (@ RL = 1mΩ, CL = 50pF, TA = 25°C) Symbol ttout td Parameter Test Conditions Watchdog Time Out APX823/APX824/APX825A VCC> VTH-+0.2V, See timing diagram Delay Time APX823/APX824/APX825A VCC> VTH-+0.2V, See timing diagram Propagation (Delay) delay (APX823/APX825A) Time, High-to-low-level Output VCC to RESET delay MR to RESET delay tPLH Propagation (Delay) (APX824/APX825A) Time, Low-to-high-level Output VCC to RESET delay (APX824/APX825A) APX823/APX824/APX825A Document number: DS31323 Rev. 4 - 2 Typ. Max Unit 1.12 1.6 2.4 s 140 200 280 ms - - 0.1 μs - - 25 μs - - 0.1 μs - - 25 μs VCC> VTH-+0.2V, MR to RESET tPHL Min VIL=0.3 × VCC, VIH=0.7 × VCC VIL= VTH--0.2V, VIH= VTH-+0.2V VCC> VTH-+0.2V, VIL=0.3 × VCC, VIH=0.7 × VCC VIL= VTH--0.2V, VIH= VTH-+0.2V 6 of 12 www.diodes.com May 2011 © Diodes Incorporated APX823/APX824/APX825A PROCESSOR SUPERVISORY CIRCUITS Timing Diagram RESET vs Vcc Timing Diagram Vth Vcc Vth td td td td /RESET Vth RESET RESET vs /MR Timing Diagram Vth Vcc /MR td td /RESET RESET vs WDI Timing Diagram Vth Vcc WDI td tWD td tWD td /RESET APX823/APX824/APX825A Document number: DS31323 Rev. 4 - 2 7 of 12 www.diodes.com May 2011 © Diodes Incorporated APX823/APX824/APX825A PROCESSOR SUPERVISORY CIRCUITS Typical Characteristics RESET Threshold Voltage vs. Temperature RESET Timeout Period vs. Temperature 3.2 RESET Thershold Voltage (V) RESET Timeout Period (mS) 250 240 230 220 210 200 190 180 170 160 150 -40℃ -25℃ 0℃ 25℃ 50℃ 3.15 3.1 3.05 3 2.95 2.9 2.85 2.8 85℃ 105℃ 125℃ -40℃ Temperature 0℃ 25℃ 50℃ 85℃ 105℃ 125℃ Temperature Supply Curreny vs. Vcc Vcc Supply Current vs. Temperature (Vcc=3.3V Vth=2.93V) 35 40 34 35 Supply Current (uA) Vcc Supply Current (uA) -25℃ 33 32 31 30 29 28 27 30 25 20 15 10 5 26 0 25 -40℃ -25℃ 0℃ 25℃ 50℃ 85℃ 105℃ 125℃ Document number: DS31323 Rev. 4 - 2 2.5V 3.3V 4.0V 5.0V 5.5V Vcc Temperature APX823/APX824/APX825A 1.5V 8 of 12 www.diodes.com May 2011 © Diodes Incorporated APX823/APX824/APX825A PROCESSOR SUPERVISORY CIRCUITS Ordering Information APX82 XX - XX XX G - 7 Part No. Voltage Package Green Packing 3 : APX823 4 : APX824 5A : APX825A 46 : 4.63 44 : 4.38 40 : 4.00 31 : 3.08 29 : 2.93 26 : 2.63 23 : 2.25 W5 : SOT25 W6 : SOT26 G : Green 7 : Tape & Reel Device Packaging (Note 5) Quantity W5 W5 W6 SOT25 SOT25 SOT26 3000/Tape & Reel 3000/Tape & Reel 3000/Tape & Reel APX823-XXW5G-7 APX824-XXW5G-7 APX825A-XXW6G-7 Notes: 7” Tape and Reel Part Number Suffix Package Code -7 -7 -7 5. 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. Marking Information (1) SOT25 ( Top View ) 4 7 5 XX Y W X 1 2 3 XX : Identification code Y : Year 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green (2) SOT26 ( Top View ) 4 7 5 7 6 XX Y W X 1 APX823/APX824/APX825A Document number: DS31323 Rev. 4 - 2 2 3 XX : Identification code Y : Year 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green 9 of 12 www.diodes.com May 2011 © Diodes Incorporated APX823/APX824/APX825A PROCESSOR SUPERVISORY CIRCUITS Marking Information (cont.) Marking Table Device Package Type Identification Code APX823-46W5 SOT25 W1 APX823-44W5 SOT25 W2 APX823-40W5 SOT25 W3 APX823-31W5 SOT25 W4 APX823-29W5 SOT25 W5 APX823-26W5 SOT25 W6 APX823-23W5 SOT25 W7 APX824-46W5 SOT25 T2 APX824-44W5 SOT25 T3 APX824-40W5 SOT25 T4 APX824-31W5 SOT25 T5 APX824-29W5 SOT25 T6 APX824-26W5 SOT25 T7 APX824-23W5 SOT25 T8 APX825A-46W6 SOT26 T9 APX825A-44W6 SOT26 TA APX825A-40W6 SOT26 TB APX825A-31W6 SOT26 TC APX825A-29W6 SOT26 TD APX825A-26W6 SOT26 TE APX825A-23W6 SOT26 TF Package Outline Dimensions (All Dimensions in mm) (1) Package Type: SOT25 APX823/APX824/APX825A Document number: DS31323 Rev. 4 - 2 10 of 12 www.diodes.com May 2011 © Diodes Incorporated APX823/APX824/APX825A PROCESSOR SUPERVISORY CIRCUITS Package Outline Dimensions (cont.) (All Dimensions in mm) (2) Package Type: SOT26 Notes: 6. 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 APX823/APX824/APX825A Document number: DS31323 Rev. 4 - 2 11 of 12 www.diodes.com May 2011 © Diodes Incorporated APX823/APX824/APX825A PROCESSOR SUPERVISORY CIRCUITS 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 reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. 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