AP1701 DIODES | Alldatasheet

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3-PIN MICROPROCESSOR RESET CIRCUITS AP1701/2/3/4 Rev. 2 1 of 9 FEBRUARY 2007 www.diodes.com © Diodes Incorporated

  • Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power-Supply Voltages
  • Fully Specified Over Temperature
  • Available in three Output Configurations
  • Push-Pull RESET Low Output (AP1701/3)
  • Push-Pull RESET High Output (AP1702/4)
  • 200ms Min. Power-On Reset Pulse Width
  • 20µA Supply Current (Typ.)
  • Guaranteed Reset Valid to VCC = +1V
  • Power Supply Transient Immunity
  • No External Components
  • Green Package: SC59-3L
  • Lead Free Finish / RoHS Compliant (Note1) The AP1701/2/3/4 are used for microprocessor (µP) supervisory circuits to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with +5V, +3.3V, +3.0V powered circuits. These circuits perform a single function: they assert a reset signal whenever the V CC supply voltage declines below a preset threshold, keeping it asserted for at least 240ms after VCC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available. The AP1701/2/3/4 have push pull outputs. The AP1701/3 have an active low RESET output, while the AP1702/4 has an active high 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 VCC down to 1V. Low supply current makes the AP1701/2/3/4 ideal for use in portable equipment. The AP1701/2/3/4 is available in a 3-pin SC59 package.
  • Computers
  • Controllers
  • Intelligent Instruments
  • Critical µP and µC Power Monitoring
  • Portable/Battery Powered Equipment
  • Automotive AP170X X X X X Voltage Package Packing A : 4.63 B : 4.38 C: 4 . 0 0 D: 3 . 0 8 E : 2.93 F:2 . 6 3 G : 2.25 W: S C 5 9 -7 : Taping Enable 1 : Active-Low 2: A c t i v e - H i g h 3 : Active-Low 4: A c t i v e - H i g h Lead Free L : Lead Free G : Green Notes: 2. 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. Features General Description

Applications

Ordering Information

7” Tape and Reel Device Package Code Packaging (Note 2) Quantity Part Number Suffix AP170XXW W SC59 3000/Tape & Reel -7

3-PIN MICROPROCESSOR RESET CIRCUITS AP1701/2/3/4 Rev. 2 2 of 9 FEBRUARY 2007 www.diodes.com © Diodes Incorporated (Top View) 2GND VCC AP1703 AP1704 (RESET)RESET (Top View) GND (RESET) VCC AP1701 AP1702 RESET SC59-3L SC59-3L Absolute Maximum Ratings Symbol Parameter Rating Unit VCC Terminal Voltage (with respect to GND) -0.3 to +6.0 V VRESET RESET, RESET (push-pull) -0.3 to (VCC + 0.3) V ICC Input Current, V CC 20 mA IO Output Current, RESET, RESET 20 mA PD Continuous Power Dissipation (TA = +70°C), de-rate 4mW/°C above +70°C 320 mW TOP Operating Junction Temperature Range -40 to +105 °C TST Storage Temperature Range -65 to +150 °C Pin Assignments Pin Descriptions Name Description GND Ground RESET (RESET) Reset Output Pin L: for AP1701/3 H: for AP1702/4 VCC Operating Voltage Input

3-PIN MICROPROCESSOR RESET CIRCUITS AP1701/2/3/4 Rev. 2 3 of 9 FEBRUARY 2007 www.diodes.com © Diodes Incorporated Electrical Characteristics (TA = 25ºC) Symbol Parameter Conditions Min. Typ. Max. Unit VCC V CC Range T A = 0oC to +70oC 1.0 5.5 V ICC Supply Current V TH + 1.0V 20 30 µA AP1701/2/3/4A 4.54 4.63 4.72 AP1701/2/3/4B 4.29 4.38 4.47 AP1701/2/3/4C 3.92 4.00 4.08 AP1701/2/3/4D 3.02 3.08 3.14 AP1701/2/3/4E 2.87 2.93 2.99 AP1701/2/3/4F 2.57 2.63 2.68 Reset Threshold TA = 25ºC AP1701/2/3/4G 2.20 2.25 2.30 V VTH Reset Threshold Tempco 30 ppm/ oC TS Set-up Time V CC = 0 to (VTH – 100mV) 100 µs TDELAY Reset Active Timeout Period T A = 0oC to +70oC 100 240 600 ms VCC = VTH min, ISINK = 1.2mA, AP1701/3 0.3 VCC = VTH min, ISINK = 3.2mA 0.4 VOL TRESE Output Voltage Low VCC > 1.0V, ISINK = 50uA 0.3 V VCC > VTH max, ISOURCE = 500uA, AP1701/3 0.8V CC VOH TRESE Output Voltage-High VCC > VTH max, ISOURCE = 800uA V CC –1.5 V VCC = VTH max, ISINK = 1.2mA, AP1702/4 0.3 VOL RESET Output Voltage-Low V CC = VTH max, ISINK = 3.2mA 0.4 V VOH RESET Output Voltage-High 1.8V < V CC < VTH min, ISOURCE = 150uA, AP1702/4 0.8 VCC V Typical Application Circuit AP170X GND RESET (RESET) VCC Microprocessor VCC GND RESET INPUT VCC Cin 0.1uF

3-PIN MICROPROCESSOR RESET CIRCUITS AP1701/2/3/4 Rev. 2 4 of 9 FEBRUARY 2007 www.diodes.com © Diodes Incorporated Function Description A microprocessor’s (µP’s) reset input starts the µP in a known state. The AP1701/2/3/4 assert reset 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, keeping it asserted for at least 240ms after VCC has risen above the reset threshold. The AP1701/2/3/4 have a push-pull output stage. Applications Information Negative-Going V CC Transients In addition to issuing a reset to the µP during power-up, power-down, and brownout conditions, the AP1701/2/3/4 are relatively immune to short-duration negative-going V CC transients (glitches). The AP1701/2/3/4 do not generate a reset pulse. The graph was generated using a negative going pulse applied to VCC, starting 0.5V above the actual reset threshold and ending below it by the magnitude indicated (reset comparator overdrive). The graph indicates the maximum pulse width a negative going VCC transient can have without causing a reset pulse. As the magnitude of the transient increases (goes farther below the reset threshold), the maximum allowable pulse width decreases. Typically, a VCC transient that goes 100mV below the reset threshold and lasts 100µs or less will not cause a reset pulse. A 0.1µF bypass capacitor mounted as close as possible to the V CC pin provides additional transient immunity. Ensuring a Valid Reset Output Down to V CC = 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 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 VCC falls below 1V, the AP1701/3 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 VCC below 1V. However, in applications where RESET must be valid down to 0V, adding a pull down resistor to RESET causes any stray leakage currents to flow to ground, holding RESET low. R1’s value is not critical; 100k are large enough not to load RESET and small enough to pull RESET to ground. For the AP1702/4 if RESET is required to remain valid for VCC < 1V. Benefits of Highly Accurate Reset Threshold Most µP supervisor ICs has reset threshold voltages between 5% and 10% below the value of nominal supply voltages. This ensures a reset will not occur within 5% of the nominal supply, but will occur when the supply is 10% below nominal. When using ICs rated at only the nominal supply ±5%, this leaves a zone of uncertainty where the supply is between 5% and 10% low, and where the reset may or may not be asserted. RESET Block Diagram VREF Delay Circuit Driver RESET / RESET

3-PIN MICROPROCESSOR RESET CIRCUITS AP1701/2/3/4 Rev. 2 5 of 9 FEBRUARY 2007 www.diodes.com © Diodes Incorporated Performance Characteristics -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 Iq Temp ( C ) Iq vs. Temp -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 Threshold Temp 2.92 2.922 2.924 2.926 2.928 Threshold vs. Temp

3-PIN MICROPROCESSOR RESET CIRCUITS AP1701/2/3/4 Rev. 2 6 of 9 FEBRUARY 2007 www.diodes.com © Diodes Incorporated Timing Diagram TS Giltch Immunity 3000 900 270 140 90 70 58 50 50 48 480 500 1000 1500 2000 2500 3000 3500 0 100 200 300 400 500 600 700 800 900 1000 1100 RESET COMPARATOR OVERDRIVE(mV) Maximum Transient Duration(us) TDELAY VCC Active Low Active High TDELAY TDELAY T DELAY VTH

3-PIN MICROPROCESSOR RESET CIRCUITS AP1701/2/3/4 Rev. 2 7 of 9 FEBRUARY 2007 www.diodes.com © Diodes Incorporated Marking Information (1) SC59-3L 1 2 XX Y M X (Top View) XX : Identification code Y : Year 0-9 M : Month A~L L : Lead Free Package G : Green Package Device Package (Note 3) Identification Code AP1701AW SC59 EA AP1701BW SC59 EB AP1701CW SC59 EC AP1701DW SC59 ED AP1701EW SC59 EE AP1701FW SC59 EF AP1701GW SC59 W1 AP1702AW SC59 E0 AP1702BW SC59 E2 AP1702CW SC59 E3 AP1702DW SC59 E4 AP1702EW SC59 E5 AP1702FW SC59 E6 AP1702GW SC59 W2 AP1703AW SC59 EG AP1703BW SC59 EH AP1703CW SC59 EI AP1703DW SC59 EJ AP1703EW SC59 EK AP1703FW SC59 EL AP1703GW SC59 W3 AP1704AW SC59 E7 AP1704BW SC59 E8 AP1704CW SC59 E9 AP1704DW SC59 EM AP1704EW SC59 EN AP1704FW SC59 EP AP1704GW SC59 W4

3-PIN MICROPROCESSOR RESET CIRCUITS AP1701/2/3/4 Rev. 2 8 of 9 FEBRUARY 2007 www.diodes.com © Diodes Incorporated Package Information (All Dimensions in mm) (1) Package Type: SC59-3L 0.35/0.50 0.10/0.20 2.70/ 3.00 2.90/3.10 1.00/ 1.30 1.50/ 1.70 1.90 TOP VIEW 0°/8°

3-PIN MICROPROCESSOR RESET CIRCUITS AP1701/2/3/4 Rev. 2 9 of 9 FEBRUARY 2007 www.diodes.com © Diodes Incorporated IMPORTANT NOTICE LIFE SUPPORT Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products 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 our website, harmless against all damages. Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated.