MAX6802UR29D1/V+T

MAX6800/MAX6801/ MAX6802 General Description The MAX6800/MAX6801/MAX6802 microprocessor (μP) supervisory circuits monitor the power supplies in 2.85V to 5.0V μP and digital systems. They increase circuit reliability and reduce cost by eliminating external components and adjustments. These devices perform a single function—they assert a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for a preset timeout period after VCC has risen above the reset threshold. The only difference among the three devices is their output. The MAX6801 (push/pull) and MAX6802 (open-drain) have an active-low RESET output, while the MAX6800 (push/pull) has an active-high RESET output. The devices are guaranteed to be in the correct state for VCC down to 0.7V. The MAX6802 is guaranteed to be in the correct state for VCC down to 1.0V. The reset comparator in these ICs is designed to ignore fast transients on VCC. Reset thresholds are factorytrimmable between 2.63V and 4.80V, in approximately 100mV increments. These devices are available with a 1ms (min), 20ms (min), or 100ms (min) reset pulse width. Ideal for space-critical applications, the MAX6800/ MAX6801/MAX6802 come packaged in a 3-pin SOT23. For a lower threshold voltage version, see the MAX6332/ MAX6333/MAX6334. Applications ●● ●● ●● ●● ●● Computers Controllers Intelligent Instruments Critical μP/μC Power Monitoring Portable/Battery-Powered Equipment 3-Pin, Low-Power μP Reset Circuits Benefits and Features ●● Ultra-Low 0.7V Operating Supply Voltage ●● Low 4.0μA Supply Current ●● Precision Monitoring of 2.85V to 5.0V PowerSupply Voltages ●● Reset Thresholds Available from 2.63V to 4.80V, in Approximately 100mV Increments ●● Fully Specified over Temperature ●● Three Power-On Reset Timeout Periods Available (1ms min, 20ms min, 100ms min) ●● Low Cost ●● Three Available Output Structures: Push/Pull RESET, Push/Pull RESET, Open-Drain RESET ●● Guaranteed RESET/RESET Valid to VCC = 0.7V (MAX6800/MAX6801) ●● Power-Supply Transient Immunity ●● No External Components Required ●● 3-Pin SOT23 Package ●● Pin-Compatible with MAX809/MAX810, MAX6326/MAX6327/MAX6328, and MAX6346/MAX6347/MAX6348 Typical Operating Circuit VCC VCC VCC MAX6801 µP Selector Guide (Standard Versions*) appears at end of data sheet. RESET GND 19-1933; Rev 5; 2/16 RESET GND MAX6800/MAX6801/ MAX6802 3-Pin, Low-Power μP Reset Circuits Absolute Maximum Ratings Terminal Voltage (with respect to GND) VCC.......................................................................-0.3V to +6V Push/Pull RESET, RESET..................... -0.3V to (VCC + 0.3V) Open-Drain RESET..............................................-0.3V to +6V Input Current (VCC).............................................................20mA Output Current (RESET, RESET).......................................20mA Continuous Power Dissipation (TA = +70°C) 3-Pin SOT23 (derate 4mW/°C above +70°C)..............320mW Operating Temperature Range.......................... -40°C to +125°C Junction Temperature.......................................................+150°C Storage Temperature Range............................. -65°C to +150°C Lead Temperature (soldering, 10s).................................. +300°C Soldering Temperature (reflow)........................................ +300°C Lead (Pb)-free packages..............................................+260°C Package containing lead (Pb)......................................+240°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 in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (VCC = full range, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25°C, reset not asserted.) (Note 1) PARAMETER SYMBOL Supply Voltage Range (Note 2) VCC Supply Current ICC Reset Threshold VTH VCC Falling Reset Delay Reset Active Timeout Period CONDITIONS MAX6800/MAX6801 TA = 0°C to +125°C MAX6802 MAX6800/MAX6801 TA = -40°C to +125°C MAX6802 VCC = +3.0V No load VCC = +5.0V MAX680_UR_ _D_-T, Table 1 TA = -40°C to +125°C VCC falling at 10V/ms tRP TYP 4 MAX 5.5 5.5 5.5 5.5 10 5 12 VTH - 1.8% VTH VTH + 1.8% VTH - 3% VTH VTH + 3% 30 1 1.5 2 MAX680_UR_ _D2-T 20 30 40 MAX680_UR_ _D3-T 100 150 200 VOL Reset asserted RESET Output High-Voltage (MAX6801) VOH Reset not asserted VOH Reset asserted VOL Reset not asserted ISINK = 50µA, VCC ≥ 1.0V 0.3 0.8 x VCC ISOURCE = 1µA, VCC ≥ 1.0V 0.8 x VCC ISOURCE = 800µA, VCC ≥ 4.25V 0.8 x VCC ISOURCE = 200µA, VCC ≥ 1.8V ISINK = 1.2mA, VCC ≥ 3.0V µA V ms V 0.4 ISOURCE = 500µA, VCC ≥ 3.0V ISOURCE = 800µA, VCC ≥ 5.0V V 0.4 ISINK = 1.2mA, VCC ≥ 2.5V ISINK = 1.2mA, VCC ≥ 4.25V UNITS µs MAX680_UR_ _D1-T RESET Output Low-Voltage (MAX6801/MAX6802) RESET Output Voltage (MAX6800) TA = +25°C MIN 0.7 1.0 0.78 1.2 V 0.8 x VCC 0.8 x VCC V 0.3 0.4 ISINK = 3.2mA, VCC ≥ 5.0V RESET Output Leakage Current 0.5 µA VCC > VTH, RESET not asserted (MAX6802) Note 1: All parts are production tested at TA = +25°C. Overtemperature limits are guaranteed by design and not production tested. Note 2: ISOURCE for the MAX6800 is 100nA. ISINK for the MAX6801 is 100nA. ISINK for the MAX6802 is 50μA. www.maximintegrated.com Maxim Integrated │  2 MAX6800/MAX6801/ MAX6802 3-Pin, Low-Power μP Reset Circuits Typical Operating Characteristics (Reset not asserted, TA = +25°C, unless otherwise noted.) 4.5 VCC = +3.3V 3.5 -25 0 25 50 100 125 0.980 0.970 40 MAX6800/01/02 toc03 TA = +25°C TA = -40°C 20 0.960 0.950 -50 -25 0 25 50 75 100 0 125 1.0 1.5 2.0 2.5 3.0 TEMPERATURE (°C) VCC (V) RESET (VOH) vs. SUPPLY VOLTAGE MAXIMUM TRANSIENT DURATION vs. RESET COMPARATOR OVERDRIVE VCC FALLING PROPAGATION DELAY vs. TEMPERATURE VTH = 2.93V ISOURCE = 100A RESET ASSERTED (MAX6800) 75 TA = +125°C 50 TA = +85°C TA = +25°C 25 TA = -40°C 1.0 0.990 TA = +85°C TEMPERATURE (°C) 100 0 75 1.000 60 1.5 2.0 VCC (V) www.maximintegrated.com 2.5 3.0 600 500 400 RESET OCCURS 300 200 RESET DOES NOT OCCUR 100 0 0.1 1 100 90 80 70 VCC = FALLING AT 1V/ms 60 50 40 30 20 VCC = FALLING AT 10V/ms 10 10 100 1000 RESET COMPARATOR OVERDRIVE (mV) MAX6800/01/02 toc06 -50 MAX6800/01/02 toc04 OUTPUT VOLTAGE HIGH (VCC - VOH) (mV) 3.0 1.010 VTH = 2.93V ISINK = 500mA RESET ASSERTED MAX6801/MAX6802 TA = +125°C PROPAGATION DELAY (µs) 4.0 1.020 MAX6800/01/02 toc05 5.0 1.030 80 OUTPUT VOLTAGE LOW (mV) VCC = +5.0V 1.040 MAXIMUM TRANSIENT DURATION (µs) ICC (µA) 5.5 MAX6800/01/02 toc02 6.0 1.050 NORMALIZED RESET TIMEOUT PERIOD MAX6800/01/02 toc01 6.5 RESET (VOL) vs. SUPPLY VOLTAGE NORMALIZED RESET TIMEOUT PERIOD vs. TEMPERATURE SUPPLY CURRENT vs. TEMPERATURE 0 -50 -25 0 25 50 75 100 125 TEMPERATURE (°C) Maxim Integrated │  3 MAX6800/MAX6801/ MAX6802 3-Pin, Low-Power μP Reset Circuits Pin Configuration TOP VIEW GND 1 MAX6800 MAX6801 MAX6802 3 VCC RESET (RESET) 2 SOT23-3 ( ) ARE FOR MAX6800 Pin Description PIN MAX6800 MAX6801/ MAX6802 NAME 1 1 GND FUNCTION Ground — 2 RESET Active-Low Reset Output. RESET is asserted while VCC is below the reset threshold and remains asserted for a reset timeout period (tRP) after VCC rises above the reset threshold. RESET on the MAX6801 is push/pull. RESET on the MAX6802 is open-drain. 2 — RESET Active-High Reset Output. RESET is asserted while VCC is below the reset threshold and remains asserted for a reset timeout period (tRP) after VCC rises above the reset threshold. RESET on the MAX6800 is push/pull. 3 3 VCC www.maximintegrated.com Supply Voltage Input Maxim Integrated │  4 MAX6800/MAX6801/ MAX6802 3-Pin, Low-Power μP Reset Circuits Applications Information Interfacing to μPs with Bidirectional Reset Pins Since the RESET output on the MAX6802 is opendrain, this device interfaces easily with μPs 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 pullup resistor allows either device to assert reset (Figure 1). Negative-Going VCC Transients In addition to issuing a reset to the μP during power-up, power-down, and brownout conditions, these devices are relatively immune to short-duration, negativegoing VCC transients (glitches). The Typical Operating Characteristics show the Maximum Transient Duration vs. Reset Comparator Overdrive graph. The graph shows the maximum pulse width that a negative-going VCC transient may typically have without issuing a reset signal. As the amplitude of the transient increases, the maximum allowable pulse width decreases. Ensuring a Valid Reset Output Down to VCC = 0V When VCC falls below 1V and approaches the minimum operating voltage of 0.7V, push/pull-structured reset sinking (or sourcing) capabilities decrease drastically. High-impedance CMOS-logic inputs connected to the RESET pin can drift to indeterminate voltages. This does not present a problem in most cases, since most μPs and circuitry do not operate when VCC drops below 1V. For the MAX6801 application, where RESET must be valid down to 0V, adding a pulldown resistor between RESET and GND removes stray leakage currents, holding RESET low (Figure 2a). The pulldown resistor value is not critical; 100kΩ is large enough not to load RESET and small enough to pull it low. For the MAX6800 application, where RESET must be valid to VCC = 0V, a 100kΩ pullup resistor between RESET and VCC will hold RESET high when VCC falls below 0.7V (Figure 2b). Since the MAX6802 has an open-drain, active-low output, it typically uses a pullup resistor. With this device, RESET will most likely not maintain an active condition, but will drift to a non-active level due to the pullup resistor and the reduced sinking capability of the open-drain device. Therefore, this device is not recommended for applications where the RESET pin is required to be valid down to VCC = 0V. VCC VCC VCC VCC VCC 100kΩ MAX6802 RESET GND MAX6801 µP MOTOROLA 68HCXX RESET GND MAX6800 RESET GND (a) 100kΩ* RESET 100kΩ GND (b) *ASSUMES HIGH-Z RESET INPUT TO THE µP Figure 1. Interfacing to μPs with Bidirectional Reset Pins www.maximintegrated.com Figure 2. Ensuring Reset Valid Down to VCC = 0V Maxim Integrated │  5 MAX6800/MAX6801/ MAX6802 3-Pin, Low-Power μP Reset Circuits Table 1. Factory-Trimmed Reset Thresholds RESET THRESHOLD SUFFIX MIN 48 4.714 47 46 TA = +25°C TYP (VTH) TA = -40°C to +125°C MAX MIN MAX 4.80 4.886 4.656 4.944 4.615 4.70 4.785 4.559 4.841 4.547 4.63 4.713 4.491 4.769 45 4.419 4.50 4.581 4.365 4.635 44 4.301 4.38 4.459 4.249 4.511 43 4.223 4.30 4.377 4.171 4.429 42 4.124 4.20 4.276 4.074 4.326 41 4.026 4.10 4.174 3.977 4.223 40 3.928 4.00 4.072 3.880 4.120 39 3.830 3.90 3.970 3.783 4.017 38 3.732 3.80 3.868 3.686 3.914 37 3.633 3.70 3.767 3.589 3.811 36 3.535 3.60 3.665 3.492 3.708 35 3.437 3.50 3.563 3.395 3.605 34 3.339 3.40 3.461 3.298 3.502 33 3.241 3.30 3.359 3.201 3.399 32 3.142 3.20 3.258 3.104 3.296 31 3.025 3.08 3.135 2.988 3.172 30 2.946 3.00 3.054 2.910 3.090 29 2.877 2.93 2.983 2.842 3.018 28 2.750 2.80 2.850 2.716 2.884 27 2.651 2.70 2.749 2.619 2.781 26 2.583 2.63 2.677 2.551 2.709 www.maximintegrated.com Maxim Integrated │  6 MAX6800/MAX6801/ MAX6802 3-Pin, Low-Power μP Reset Circuits Selector Guide (Standard Versions*) PART OUTPUT STAGE NOMINAL VTH (V) MIN RESET TIMEOUT (ms) SOT TOP MARK MAX6800UR26D3-T Push/Pull RESET 2.63 100 FZIE MAX6800UR29D3-T Push/Pull RESET 2.93 100 FZIF MAX6800UR31D3-T Push/Pull RESET 3.08 100 FZIG MAX6800UR44D3-T Push/Pull RESET 4.38 100 FZIH MAX6800UR46D3-T Push/Pull RESET 4.63 100 FZII MAX6801UR26D3-T Push/Pull RESET 2.63 100 FZIK MAX6801UR29D3-T Push/Pull RESET 2.93 100 FZIM MAX6801UR31D3-T Push/Pull RESET 3.08 100 FZIN MAX6801UR44D3-T Push/Pull RESET 4.38 100 FZIO MAX6801UR46D3-T Push/Pull RESET 4.63 100 FZIP MAX6802UR26D3-T Open-Drain RESET 2.63 100 FZIQ MAX6802UR29D3-T Open-Drain RESET 2.93 100 FZIR MAX6802UR31D3-T Open-Drain RESET 3.08 100 FZIS MAX6802UR44D3-T Open-Drain RESET 4.38 100 FZIT MAX6802UR46D3-T Open-Drain RESET 4.63 100 FZIU *Sample stock is generally held on all standard versions. Ordering Information PART Chip Information TEMP RANGE PIN-PACKAGE MAX6800UR_ _D_-T -40°C to +125°C 3 SOT23 MAX6801UR_ _D_-T -40°C to +125°C 3 SOT23 MAX6802UR_ _D_-T -40°C to +125°C 3 SOT23 *These devices are available in factory-set VCC reset thresholds from 2.63V to 4.80V, in approximately 0.1V increments. Choose the desired reset threshold suffix from Table 1 and insert it in the blanks following “UR” in the part number. Factory-programmed reset timeout periods are also available. Insert the number corresponding to the desired nominal reset timeout period (1 = 1ms min, 2 = 20ms min, 3 = 100ms min) in the blank following “D” in the part number. There are 15 standard versions with a required order increment of 2500 pieces. Sample stock is generally held on the standard versions only (see Selector Guide). Contact the factory for availability of nonstandard versions (required order increment is 10,000 pieces). All devices available in tape-and-reel only. Devices are available in both leaded and lead-free packaging. Specify lead-free by replacing “-T” with “+T” when ordering. www.maximintegrated.com PROCESS: BiCMOS Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 3 SOT23 U3-1 21-0051 90-0179 Maxim Integrated │  7 MAX6800/MAX6801/ MAX6802 3-Pin, Low-Power μP Reset Circuits Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 3 10/11 Added automotive-qualified part information to Ordering Information. 1 4 3/12 Updated Factory-Trimmed Reset Thresholds table. 5 5 2/16 Updated Ordering Information table 1 DESCRIPTION For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. ©  2016 Maxim Integrated Products, Inc. │  8