MAX6326/MAX6327/ 3-Pin, Ultra-Low-Power SC70/SOT MAX6328/MAX6346/ P Reset Circuits MAX6347/MAX6348 General Description Features Ultra-Low 1A (max) Supply Current The MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/ (MAX6326/MAX6327/MAX6328) MAX6348 microprocessor (P) supervisory circuits moni- Precision Monitoring of 2.5V, 3V, 3.3V, and 5V tor the power supplies in P and digital systems. These Power-Supply Voltages devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when Reset Thresholds Available from 2.2V to 4.63V used with 2.5V, 3V, 3.3V, and 5V powered circuits. Fully Specified Over Temperature These circuits perform a single function: they assert a 100ms (min) Power-On Reset Pulse Width reset signal whenever the V supply voltage declines CC Low Cost below a preset threshold, keeping it asserted for at least Available in Three Versions: Push-Pull RESET, 100ms after V has risen above the reset threshold. CC Push-Pull RESET, and Open-Drain RESET The only difference between the devices is their out- Power-Supply Transient Immunity put. The MAX6326/MAX6346 (push-pull) and MAX6328/ No External Components MAX6348 (open-drain) have an active-low reset output. The MAX6327/MAX6347 have an active-high push-pull 3-Pin SC70/SOT23 Packages reset output. All of these parts are guaranteed to be in the Pin Compatible with MAX803/MAX809/MAX810 correct state for V down to 1V. The reset comparator is CC designed to ignore fast transients on V . Reset thresh- Ordering Information CC olds are factory-trimmable between 2.2V and 4.63V, in PART TEMP. RANGE PIN-PACKAGE approximately 100mV increments. Twenty-one standard MAX6326XR -T -40C to +85C 3 SC70-3 versions are available. Contact the factory for availability MAX6326UR -T -40C to +85C 3 SOT23-3 of nonstandard versions. MAX6327XR -T -40C to +85C 3 SC70-3 Ultra-low supply currents (1A max for the MAX6326/ MAX6327UR -T -40C to +85C 3 SOT23-3 MAX6327/MAX6328) make these parts ideal for use in portable equipment. All six devices are available in space- MAX6328XR -T -40C to +85C 3 SC70-3 saving SOT23 and SC70 packages. MAX6328UR -T -40C to +85C 3 SOT23-3 Applications MAX6346XR -T -40C to +85C 3 SC70-3 Computers Power Monitoring MAX6346UR -T -40C to +85C 3 SOT23-3 Intelligent Instruments Portable/Battery-Powered MAX6347XR -T -40C to +85C 3 SC70-3 Controllers Equipment MAX6347UR -T -40C to +85C 3 SOT23-3 Critical P and C MAX6348XR -T -40C to +85C 3 SC70-3 Pin Configuration MAX6348UR -T -40C to +85C 3 SOT23-3 TOP VIEW The MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/ MAX6348 are available in factory-set V reset thresholds CC GND 1 from 2.2V to 4.63V, in approximately 0.1V increments. Choose MAX6326 the desired reset-threshold suffix from Table 1 and insert it in MAX6327 the blank spaces following R. There are 21 standard ver- MAX6328 sions with a required order increment of 2500 pieces. Sample 3 V CC MAX6346 stock is generally held on the standard versions only (see the MAX6347 Selector Guide). Required order increment is 10,000 pieces for MAX6348 nonstandard versions (Table 2). Contact factory for availability. (RESET) RESET 2 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. SOT23-3/SC70-3 ( ) ARE FOR THE MAX6327/MAX6347. Selector Guide appears at end of data sheet. 19-1294 Rev 5 4/14MAX6326/MAX6327/ 3-Pin, Ultra-Low-Power SC70/SOT MAX6328/MAX6346/ P Reset Circuits MAX6347/MAX6348 Absolute Maximum Ratings Terminal Voltage (with respect to GND) Continuous Power Dissipation (T = +70C) A V .........................................................................-0.3V to +6V 3-Pin SC70 (derate 2.7mW/C above +70C) .............174mW CC RESET, RESET (push-pull) ......................-0.3V to (V + 0.3V) 3-Pin SOT23 (derate 4mW/C above +70C) .............320mW CC RESET (open drain) ................................................-0.3V to +6V Operating Temperature Range ........................... -40C to +85C Input Current (V ) ...........................................................20mA Storage Temperature Range ............................ -65C to +150C CC Output Current (RESET, RESET) ......................................20mA Lead Temperature (soldering, 10s) .................................+300C Rate of Rise (V ) ........................................................100V/s 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 +85C, unless otherwise noted. Typical values are at T = +25C and V = 3V.) (Note 1) CC A A CC PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS T = 0C to +70C 1.0 5.5 A V Range V CC T = -40C to +85C 1.2 5.5 A MAX632 only, V = 3.0V for V 2.93V, CC TH 0.5 1.0 V = 3.2V for V > 2.93V, no load Supply Current I CC TH A CC V = 5.5V, no load 1.0 1.75 CC V - V + TH TH T = +25C V A TH 1.5% 1.5% Reset Threshold V Table 1 V TH V - V + TH TH T = -40C to +85C V A TH 2.5% 2.5% Reset Threshold Tempco V /C 40 ppm/C TH V to Reset Delay V = V to (V - 100mV) 20 s CC CC TH TH Reset Active Timeout Period 100 185 280 ms RESET Output Voltage I = 1.6mA, V > 2.1V, reset asserted 0.3 SINK CC (MAX6326/MAX6328/ V V OL I = 100A, V 1.2V, reset asserted 0.4 MAX6346/MAX6348) SINK CC I = 500A, V = 3.2V, MAX6326 only 0.8 V SOURCE CC CC RESET Output Voltage V I = 800A, V = 4.5V, V 4.38V 0.8 V V OH SOURCE CC TH CC (MAX6326/MAX6346) I = 800A, V = V V 4.5V 0.8 V SOURCE CC TH(MAX), TH CC I = 500A, V 2.1V, reset asserted 0.8 V SOURCE CC CC V OH I = 50A, V 1.2V, reset asserted 0.8 V SOURCE CC CC I = 1.2mA, V 3.2V, reset not asserted, SINK CC 0.3 RESET Output Voltage MAX6327 only V (MAX6327/MAX6347) V OL I = 3.2mA, V 4.5V, reset not asserted, SINK CC 0.4 V 4.38V TH I = 3.2mA, V = V , V 4.5V 0.4 SINK CC TH(MAX) TH MAX6326/MAX6327/MAX6328 6.3 RESET Threshold mV Hysteresis MAX6346/MAX6347/MAX6348 9.5 Open-Drain RESET 0.1 A Output Leakage Current Note 1: Overtemperature limits are guaranteed by design and not production tested. Maxim Integrated 2 www.maximintegrated.com