MAX6803/MAX6804/MAX6805 19-1946 Rev 2 12/05 4-Pin, Low-Power P Reset Circuits with Manual Reset General Description Features The MAX6803/MAX6804/MAX6805 microprocessor (P) Ultra-Low 0.7V Operating Supply Voltage supervisory circuits monitor the power supplies in 2.85V Low 4.0A Supply Current to 5.0V P and digital systems. They increase circuit reliability and reduce cost by eliminating external com- Precision Monitoring of 2.85V to 5.0V Power- ponents and adjustments. They also feature a Supply Voltages debounced manual reset input. Reset Thresholds Available from 2.63V to 4.80V, These devices perform a single function: they assert a in Approximately 100mV Increments reset signal whenever the V supply voltage declines CC Debounced Manual Reset Input below a preset threshold or whenever manual reset is asserted. Reset remains asserted for a preset timeout Fully Specified over Temperature period after V has risen above the reset threshold or CC Three Power-On Reset Timeout Periods Available after manual reset is deasserted. The only difference (1ms min, 20ms min, 100ms min) among the three devices is their output. The MAX6804 Low Cost (push/pull) and MAX6805 (open-drain) have an active- low RESET output, while the MAX6803 (push/pull) has Three Available Output Structures: Push/Pull an active-high RESET output. The MAX6803/MAX6804 RESET, Push/Pull RESET, Open-Drain RESET are guaranteed to be in the correct state for V down CC Guaranteed RESET/RESET Valid to V = 0.7V to 0.7V. The MAX6805 is guaranteed to be in the cor- CC rect state for V down to 1.0V. CC (MAX6803/MAX6804) The reset comparator in these ICs is designed to ignore Power-Supply Transient Immunity fast transients on V . Reset thresholds are factory- CC No External Components Required trimmable between 2.63V and 4.80V, in approximately 4-Pin SOT143 Package 100mV increments. These devices are available with a 1ms min, 20ms min, or 100ms min reset timeout period. Pin Compatible with MAX811/MAX812 and Ideal for space-critical applications, the MAX6803/ MAX6314/MAX6315 MAX6804/MAX6805 come packaged in a 4-pin SOT143. For a lower threshold voltage version, see the MAX6335/MAX6336/MAX6337. Applications Ordering Information Computers PART* TEMP RANGE PIN-PACKAGE Controllers MAX6803US D -T -40C to +125C 4 SOT143 MAX6804US D -T -40C to +125C 4 SOT143 Intelligent Instruments MAX6805US D -T -40C to +125C 4 SOT143 Critical P/C Power Monitoring *These devices are available in factory-set V reset thresh- CC Portable/Battery-Powered Equipment olds from 2.63V to 4.80V, in approximately 0.1V increments. Automotive Choose the desired reset threshold suffix from Table 1 and insert it in the blanks following US 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 stan- dard 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 non- Typical Operating Circuit and Pin Configuration appear standard versions (required order increment is 10,000 pieces). at end of data sheet. All devices available in tape-and-reel only. Devices are available in both leaded and lead-free packaging. Selector Guide appears at end of data sheet. Specify lead-free by replacing -T with +T when ordering. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.4-Pin, Low-Power P Reset Circuits with Manual Reset ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) Continuous Power Dissipation (T = +70C) A V ......................................................................-0.3V to +6V 4-Pin SOT143 (derate 4mW/C above +70C) ............320mW CC Push/Pull RESET or RESET, MR ............-0.3V to (V + 0.3V) Operating Temperature Range .........................-40C to +125C CC Junction Temperature......................................................+150C Open-Drain RESET ..............................................-0.3V to +6V Storage Temperature Range .............................-65C to +150C Input Current (V ).............................................................20mA CC Lead Temperature (soldering, 10s) .................................+300C Output Current (RESET, RESET).........................................20mA 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 (V = full range, T = -40C to +125C, unless otherwise noted. Typical values are at V = +5.0V and T = +25C, reset not CC A CC A asserted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX6803/MAX6804 0.7 5.5 T = 0C to +125C A MAX6805 1.0 5.5 Supply Voltage Range V V CC (Note 1) MAX6803/MAX6804 0.78 5.5 T = -40C to +125C A MAX6805 1.2 5.5 V = +3.0V 4 10 CC Supply Current I No load A CC V = +5.0V 5 12 CC V V TH TH T = +25C V A TH - 1.8% + 1.8% MAX680 US D -T, Reset Threshold V V TH Table 1 V V TH TH T = - 40C to +1 25C V A TH - 3% + 3% V Falling Reset Delay V falling at 10V/ms 30 s CC CC MAX680 US D1-T 1 1.5 2 Reset Active Timeout Period t MAX680 US D2-T 20 30 40 ms RP MAX680 US D3-T 100 150 200 MR Minimum Pulse Width 1s MR Glitch Immunity 50 ns MR Reset Delay 0.1 s V 0.3 V IL CC MR Input Voltage V V 0.7 V IH CC MR Pullup Resistance 12 20 30 k I = 50A, V 1.0V 0.4 SINK CC RESET Output Low Voltage Reset V I = 1.2mA, V 2.5V 0.3 V OL SINK CC (MAX6804/MAX6805) asserted I = 3.2mA, V 4.25V 0.4 SINK CC I = 500A, V 3.0V 0.8 V RESET Output High Voltage Reset not SOURCE CC CC V V OH (MAX6804) asserted I = 800A, V 5.0V 0.8 V SOURCE CC CC 2 MAX6803/MAX6804/MAX6805