MAX6803/MAX6804/ 4-Pin, Low-Power MAX6805 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 cir- Precision Monitoring of 2.85V to 5.0V Power-Supply cuit reliability and reduce cost by eliminating external Voltages components and adjustments. They also feature a Reset Thresholds Available from 2.63V to 4.80V, debounced manual-reset input. in Approximately 100mV Increments These devices perform a single function: they assert a reset signal whenever the V supply voltage declines Debounced Manual-Reset Input CC below a preset threshold or whenever manual reset is Fully Specified over Temperature asserted. Reset remains asserted for a preset timeout Three Power-On Reset Timeout Periods Available period after V has risen above the reset threshold or CC (1ms min, 20ms min, 100ms min) after manual reset is deasserted. The only difference Low Cost among the three devices is their output. The MAX6804 (push/pull) and MAX6805 (open-drain) have an active- Three Available Output Structures: Push/Pull low RESET output, while the MAX6803 (push/pull) has RESET, Push/Pull RESET, Open-Drain RESET an active-high RESET output. The MAX6803/MAX6804 Guaranteed RESET/RESET Valid to VCC = 0.7V are guaranteed to be in the correct state for V down CC (MAX6803/MAX6804) to 0.7V. The MAX6805 is guaranteed to be in the correct Power-Supply Transient Immunity state for V down to 1.0V. CC No External Components Required The reset comparator in these ICs is designed to ignore fast transients on V . Reset thresholds are factory- CC 4-Pin SOT143 Package trimmable between 2.63V and 4.80V, in approximately Pin Compatible with MAX811/MAX812 and 100mV increments. These devices are available with a MAX6314/MAX6315( 1ms min, 20ms min, or 100ms min reset timeout period. Ideal for space-critical applications, the MAX6803/ Ordering Information MAX6804/MAX6805 come packaged in a 4-pin SOT143. PART* TEMP RANGE PIN-PACKAGE For a lower threshold voltage version, see the MAX6335/ MAX6803US D -T -40C to +125C 4 SOT143 MAX6336/MAX6337. MAX6804US D -T -40C to +125C 4 SOT143 Applications MAX6805US D -T -40C to +125C 4 SOT143 Computers *These devices are available in factory-set V reset thresh- CC olds from 2.63V to 4.80V, in approximately 0.1V increments. Controllers Choose the desired reset threshold suffix from Table 1 and Intelligent Instruments insert it in the blanks following US in the part number. Critical P/C Power Monitoring Factory-programmed reset timeout periods are also available. Portable/Battery-Powered Equipment 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. 19-1946 Rev 3 7/14MAX6803/MAX6804/ 4-Pin, Low-Power MAX6805 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 Open-Drain RESET .............................................-0.3V to +6V Junction Temperature ......................................................+150C Input Current (V ) ............................................................20mA Storage Temperature Range ............................ -65C to +150C CC Output Current (RESET, RESET) ......................................20mA Lead Temperature (soldering, 10s) .................................+300C 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 +125C 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 1 s 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 kW 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 SOURCE CC CC RESET Output High Voltage Reset not V V OH (MAX6804) asserted I = 800A, V 5.0V 0.8 V SOURCE CC CC Maxim Integrated 2 www.maximintegrated.com