MXD1810MXD1813/ Low-Power P Reset Circuits in 3-Pin MXD1815MXD1818 SC70/SOT23 General Description Features The MXD1810MXD1813/MXD1815MXD1818 fam- Precision Monitoring of +2.5V, +3V, +3.3V, and +5V ily of microprocessor (P) reset circuits monitor power Power-Supply Voltages supplies in P and digital systems. These devices Available in Four Reset Output Configurations provide excellent circuit reliability and low cost by Factory-Set Reset Threshold Voltages: 2.18V, eliminating external components and adjustments when 2.31V, 2.55V, 2.88V, 3.06V, 4.12V, 4.37V, 4.62V used with +2.5V/+3.0V/+3.3V (MXD1815MXD1818), 2.5% Reset Threshold Accuracy Over Temperature and +5V (MXD1810MXD1813) systems. Fixed Reset Timeout Period: 100ms (min) These circuits assert a reset signal whenever the V CC Guaranteed RESET/RESET Valid to V = +1V CC supply voltage declines below a preset threshold, keeping Debounced Manual-Reset Detect (MXD1813/ reset asserted for at least 100ms after V rises above the CC MXD1818) reset threshold. The MXD1813/MXD1818 also keep reset asserted for at least 100ms after the output is momentarily Power-Supply Transient Immunity pulled to GND by an external pushbutton switch. No External Components The MXD1812/MXD1817 have an active-high push- Low Power Consumption (4A) pull RESET output. The MXD1810/MXD1815 (push- Pin Compatible with DS181 Products (SOT23) pull) and MXD1811/MXD1813/MXD1816/MD1818 (open- 3-Pin SC70 and SOT23 Packages drain) have an active-low RESET output. The open-drain devices (MXD1811/MXD1813/MXD1816/MXD1818) Ordering Information have an internal pullup resistor to V . The MXD1813/ CC PART TEMP RANGE PIN-PACKAGE MXD1818 feature a debounced manual-reset feature that MXD1810UR -T -40C to +105C 3 SOT23 asserts a reset if the RESET pin is pulled low for more MXD1810XR -T -40C to +105C 3 SC70 than 1.5s. When used to initiate manual reset, RESET debounces signals from devices such as mechanical The MXD1810MXD1813/MXD1815MXD1818 are available with factory-set V reset thresholds from +2.18V to +3.06V switches. For devices with this feature, the release of the CC (MXD1815MXD1818) and +4.12V to +4.62V (MXD1810 external switch triggers the reset period. MXD1813). Choose the desired reset-threshold suffix from the The MXD1810MXD1813/MXD1815MXD1818 are Reset Threshold Table and insert it in place of the following R in the part number. All devices are available in guaranteed to output the correct logic state for V down CC tape-and-reel only in 2500 unit increments. Other threshold to +1V. These ICs provide a reset comparator designed voltages may be available. Contact factory for availability. to ignore fast transients on V . Reset thresholds are CC Devices are available in both leaded and lead(Pb)-free packag- available between +2.18V and +4.62V. These ing. Specify lead-free by replacing -T with +T when ordering. small, low-power (4A) devices are ideal for use in portable equipment. All are available in space-saving Ordering Information continued at end of data sheet. 3-pin SC70 and SOT23 packages, and are specified from -40C to +105C. Pin Configurations TOP VIEW Applications Computers and Controllers RESET V 1 1 CC Intelligent Instruments (RESET) Set-Top Boxes MXD181 X 3 GND MXD181 U 3 GND Printers RESET 2 V 2 CC Critical P and C Monitoring (RESET) Portable/Battery-Powered Equipment SC70-3 SOT23-3 () ARE FOR THE MXD1812/MXD1817 19-2243 Rev 2 11/14MXD1810MXD1813/ Low-Power P Reset Circuits in 3-Pin MXD1815MXD1818 SC70/SOT23 Absolute Maximum Ratings V to GND .........................................................-0.3V to +6.0V Output Current (RESET, RESET) ......................................20mA CC Push-Pull RESET (MXD1810/MXD1815), Continuous Power Dissipation (T = +70C) A RESET (MXD1812/MXD1817) to GND ...-0.3V to (V + 0.3V) 3-Pin SC70 (derate 2.17mW above +70C) ................174mW CC Open-Drain RESET (MXD1811/MXD1816) 3-Pin SOT23 (derate 4mW/C above +70C) .............320mW to GND ..............................................................-0.3V to +6.0V Operating Temperature Range .........................-40C to +105C Open-Drain RESET (MXD1813/MXD1818) Junction Temperature......................................................+150C to GND .................................................. -0.3V to (V + 0.3V) Storage Temperature Range .............................-65C to +150C CC Input Current (V , RESET) ..............................................20mA Lead Temperature (soldering, 10s) .................................+300C CC 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 +105C, unless otherwise specified. Typical values are at T = +25C.) (Note 1) CC A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS T = 0C to +105C 1.0 5.5 A Supply Voltage Range V V CC T = -40C to +105C 1.2 5.5 A V = +5.5V, V > V , no load 9 16 CC CC TH Supply Current I A CC V = +3.6V, V > V , no load 4 10 CC CC TH MXD181 R46 4.50 4.62 4.75 MXD181 R44 4.25 4.37 4.49 MXD181 R41 4.00 4.12 4.24 MXD181 R31 2.98 3.06 3.15 Reset Threshold V V TH MXD181 R29 2.80 2.88 2.97 MXD181 R26 2.47 2.55 2.64 MXD181 R23 2.25 2.31 2.37 MXD181 R22 2.12 2.18 2.25 Active Reset-Timeout Period t V rising 100 150 250 ms RP CC V = (V + 100mV) falling to (V - 200mV) 2 5 s CC TH TH V to Reset Delay t CC RD V rising, t = 5s 100 150 250 ms CC R Push-Button Detect to Reset t MXD1813/MXD1818 only 1.5 s PB Push-Button Reset-Timeout Period t MXD1813/MXD1818 only 100 150 250 ms PBRST T = +25C to +105C 0.34 MXD1813/MXD1818 A Input Low Voltage V V IL only T = -40C to +25C 0.15 A Input High Voltage V MXD1813/MXD1818 only 0.7 V V IH CC V V , reset not asserted, CC TH(MAX) RESET Output Source Current I 350 A OH MXD1810/MXD1815 V V , reset asserted, CC TH(MAX) RESET Output Source Current I 350 A OH MXD1812/MXD1817 V 2.7V, reset asserted, V = 0.4V CC OUT RESET Output Sink Current I MXD1810/MXD1811/MXD1813/MXD1815/ 10 mA OL MXD1816/MXD1818 (Note 2) V 2.7V, reset not asserted, V = 0.4V CC OUT RESET Output Sink Current I 10 mA OL MXD1812/MXD1817 Maxim Integrated 2 www.maximintegrated.com