MAX6342MAX6345 19-1568 Rev 2 12/05 6-Pin P Reset Circuit with Power-Fail Comparator General Description Features The MAX6342MAX6345 family of microprocessor (P) Small 6-Pin SOT23 Package supervisory circuits monitors power supplies in digital sys- Precision Factory-Set V Reset Thresholds CC tems. These devices significantly improve system reliabili- Between 2.33V and 4.63V ty and accuracy compared to separate ICs or discrete components. Guaranteed RESET Valid to V = +1V CC The MAX6342MAX6345 provide factory-trimmed V CC 100ms min Reset Pulse Width reset threshold voltages from 2.33V to 4.63V and operate with supply voltages between +1V and +5.5V. A +1.25V Debounced CMOS-Compatible Manual-Reset threshold detector allows for a power-fail warning, for Input low-battery detection, or for monitoring another power Voltage Monitor for Power-Fail or Low-Battery supply. The MAX6342 contains an MR input and an Warning active-low push-pull reset. The MAX6343 and MAX6344 are identical to the MAX6342 except they provide an Ordering Information active-low, open-drain reset and an active-high, push- PART TEMP RANGE PIN-PACKAGE pull reset, respectively. The MAX6345 provides a second reset output in place of the MR input to give it an active- MAX6342 UT-T -40C to +125C 6 SOT23-6 high push-pull reset and an active-low push-pull reset. MAX6343 UT-T -40C to +125C 6 SOT23-6 All of the devices are packaged in a miniature 6-pin MAX6344 UT-T -40C to +125C 6 SOT23-6 SOT23. MAX6345 UT-T -40C to +125C 6 SOT23-6 Note: The MAX6342MAX6345 are available with factory-set Applications reset thresholds from 2.33V to 4.63V (see Selector Guides 1, 2). Portable Computers Insert the letter corresponding to the desired nominal reset threshold into the blank following the part number. There is a Telecom Equipment 2500 piece order increment required for the SOT package. SOT Networking Equipment Top Marks table appears at end of data sheet. Devices are available in both leaded and lead-free packaging. Portable/Battery-Powered Equipment Specify lead-free by replacing -T with +T when ordering. Multivoltage Systems Pin Configurations Embedded Control Systems Typical Operating Circuit appears at end of data sheet. TOP VIEW Selector Guide 1 V16 RESET (RESET) CC SUFFIX RESET THRESHOLD (V) MAX6342 L 4.63 GND 2 5 MR MAX6343 MAX6344 M 4.38 T 3.08 PFI34 PFO S 2.93 ( ) ARE FOR MAX6344 ONLY. SOT23-6 R 2.63 Pin Configurations continued at end of data sheet. Z 2.33 Selector Guide 2 PUSH-PULL OPEN-DRAIN PUSH-PULL RESET MANUAL-RESET PART RESET OUTPUT RESET OUTPUT OUTPUT INPUT MAX6342 MAX6343 MAX6344 MAX6345 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.6-Pin P Reset Circuit with Power-Fail Comparator ABSOLUTE MAXIMUM RATINGS V to GND..............................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) CC A RESET, RESET 6-Pin SOT23 (derate 4mW/C above +70C).............320mW (MAX6342/MAX6344/MAX6345) ......... -0.3V to (V + 0.3V) Operating Temperature Range .........................-40C to +125C CC RESET (MAX6343)................................................... -0.3V to +6V Junction Temperature......................................................+150C MR, PFI, PFO..............................................-0.3V to (V + 0.3V) Storage Temperature Range .............................-65C to +150C CC Input Current, V ..............................................................50mA Lead Temperature Range (soldering, 10s)..................... +300C CC Output Current, RESET, RESET ..........................................50mA 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 = +1.0V to +5.5V, T = -40C to +125C, 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 Supply Voltage Range V V CC T = -40C to +125C 1.2 5.5 A V = 3V, TA = -40 to +85C 25 40 CC V = 5.5V, TA = -40 to +85C 30 50 CC Supply Current I No load A CC V = 3V, TA = -40 to +125C 25 50 CC A V = 5.5V, TA = -40 to +125C 30 60 CC T = +25C 4.56 4.63 4.70 A MAX634 L T = -40C to +85C 4.50 4.75 A 4.40 4.86 T = -40C to +125C A T = +25C 4.31 4.38 4.45 A MAX634 M T = -40C to +85C 4.25 4.50 A T = -40C to +125C 4.16 4.56 A T = +25C 3.03 3.08 3.13 A MAX634 T T = -40C to +85C 3.00 3.15 A T = -40C to +125C 2.92 3.23 A Reset Threshold V V TH T = +25C 2.89 2.93 2.97 A MAX634 S T = -40C to +85C 2.85 3.00 A T = -40C to +125C 2.78 3.08 A T = +25C 2.59 2.63 2.67 A 2.55 2.70 MAX634 R T = -40C to +85C A T = -40C to +125C 2.50 2.76 A T = +25C 2.30 2.33 2.36 A MAX634 Z T = -40C to +85C 2.25 2.38 A T = -40C to +125C 2.21 2.45 A V to Reset Delay V = V to (V - 100mV) 20 s CC CC TH TH V > 1.2V, I = 100A 0.4 CC SINK V V > 2.7V, I = 1.2mA 0.3 V OL CC SINK V > 4.5V, I = 3.2mA 0.4 CC SINK RESET and RESET Outputs Drive V > 1.2V, I = 50A 0.8 VCC CC SOURCE Capability (Note 2) V > 2.7V, I = 500A CC SOURCE 0.8 VCC (MAX6342/MAX6345 only) V V OH V > 4.5V, I = 800A CC SOURCE 0.8 VCC (MAX6342/MAX6345 only) 2 MAX6342MAX6345