MAX6736MAX6745 19-2531 Rev 2 12/05 Low-Power Dual-/Triple-Voltage SC70 P Supervisory Circuits General Description Features The MAX6736MAX6745 are low-power dual-/triple- Dual-/Triple-Supply Reset Voltage Monitors voltage microprocessor (P) supervisors. These Precision Factory-Set Reset Thresholds for devices assert a reset if any monitored supply falls Monitoring from 0.9V to 5.0V below its factory-trimmed or adjustable threshold and Adjustable Reset Input Down to 0.488V maintain reset for a minimum timeout period after all 150ms and 1200ms (min) Reset Timeout Period supplies rise above their thresholds. The integrated dual/triple supervisory circuits significantly reduce size Options and power compared to separate ICs or discrete com- V 1 Power-OK Output for Power-Supply CC ponents. The low supply current of 6A makes these Sequencing Applications (MAX6741/MAX6744) devices ideal for portable equipment. Power-Fail Input/Power-Fail Output The MAX6736/MAX6737 are dual fixed-voltage P (MAX6742/MAX6745) supervisors with a manual reset input. The MAX6738/ 6A Supply Current MAX6739 have one fixed and one adjustable reset Tiny SC70 Package threshold and a manual reset input. The MAX6740/ MAX6743 are triple-voltage P supervisors with two fixed and one user-adjustable reset threshold inputs. Ordering Information The MAX6741/MAX6744 are dual-voltage P supervi- PART TEMP RANGE PIN-PACKAGE sors with a power-OK (POK) output ideal for power- MAX6736XK D -T -40C to +85C 5 SC70-5 supply sequencing. The MAX6742/MAX6745 monitor the primary V supply and have an independent CC MAX6737XK D -T -40C to +85C 5 SC70-5 power-fail comparator. Note: The first or are placeholders for the threshold voltage levels of the devices. Desired threshold levels are set The MAX6736MAX6745 monitor I/O supply voltages by the part number suffix found in Tables 1 and 2. The after (V 1) from 1.8V to 5.0V and core supply voltages CC the D is a placeholder for the reset timeout period suffix found (V 2) from 0.9V to 3.3V with factory-trimmed reset CC in Table 3. For example, the MAX6736XKLTD3-T is a dual-volt- threshold voltage options (Table 1). An external age supervisor V 1 = 4.625V, V 2 = 3.075V, and a 150ms TH TH adjustable RSTIN input option allows monitoring volt- minimum reset timeout period. All devices are available in ages down to 0.5V. tape-and-reel only. There is a 2500-piece minimum order increment for standard versions (see Table 1). Sample stock is A variety of push-pull or open-drain reset outputs along typically held on standard versions only. Nonstandard versions with manual reset input and power-fail input/output fea- require a minimum order increment of 10,000 pieces. Contact tures are available (see the Selector Guide). The factory for availability. MAX6736MAX6745 are offered in a space-saving 5-pin Devices are available in both leaded and lead-free packaging. SC70 package and operate over the -40C to +85C Specify lead-free by replacing -T with +T when ordering. temperature range. Ordering Information and Selector Guide continued at end Applications of data sheet. Portable/Battery- Controllers Pin Configurations, Typical Application Circuits, and Powered Equipment Functional Diagram appear at end of data sheet. PDAs Multivoltage Systems GPS Equipment Notebook Computers POS Equipment Selector Guide POWER-FAIL VOLTAGE OPEN-DRAIN PUSH-PULL MANUAL POK RSTIN PART INPUT/ MONITORS RESET RESET RESET OUTPUT INPUT OUTPUT MAX6736 2 fixed X X MAX6737 2 fixed X X MAX6738 1 fixed, 1 adj X X X *Manual reset detect on RESET output. 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.Low-Power Dual-/Triple-Voltage SC70 P Supervisory Circuits ABSOLUTE MAXIMUM RATINGS V 1 V 2, POK1 to GND ......................................-0.3V to +6V Operating Temperature Range ...........................-40C to +85C CC , CC Open-Drain RESET, PFO to GND.............................-0.3V to +6V Junction Temperature......................................................+150C Push-Pull RESET to GND..........................-0.3V to (V 1 + 0.3V) Storage Temperature Range .............................-65C to +150C CC MR, RSTIN, PFI to GND............................-0.3V to (V 1 + 0.3V) Lead Temperature (soldering, 10s) .................................+300C CC Input/Output Current, All Pins .............................................20mA Continuous Power Dissipation (T = +70C) A 5-Pin SC70 (derate 3.1mW/C above +70C)..............247mW 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 = 1.2V to 5.5V, T = -40C to +85C, unless otherwise noted. Typical values are at T = +25C.) (Note 1) CC A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS T = -40C to 0C 1.2 5.5 V 1, A CC Operating Voltage Range V V 2 CC T = 0C to +85C 1.0 5.5 A V 1 = 3.3V, V 1 > V 2, no load, reset CC CC CC 510 not asserted V 1 Supply Current I 1 A CC CC V 1 = 1.8V, V 1 < V 2, no load, reset CC CC CC 510 not asserted V 2 = 1.8V, V 2 < V 1, no load, reset CC CC CC 12 not asserted V 2 Supply Current I 2 A CC CC V 2 = 3.3V, V 2 > V 1, no load, reset CC CC CC 10 20 not asserted T = 0C to +85C 4.500 4.625 4.750 A MAX67 L T = -40C to +85C 4.425 4.825 A T = 0C to +85C 4.250 4.375 4.500 A MAX67 M T = -40C to +85C 4.175 4.575 A T = 0C to +85C 3.000 3.075 3.150 A MAX67 T T = -40C to +85C 2.950 3.200 A T = 0C to +85C 2.850 2.925 3.000 A MAX67 S T = -40C to +85C 2.800 3.050 A T = 0C to +85C 2.550 2.625 2.700 A Reset Threshold for V1V 1 MAX67 R V CC TH T = -40C to +85C 2.505 2.745 A T = 0C to +85C 2.250 2.313 2.375 A MAX67 Z T = -40C to +85C 2.213 2.413 A T = 0C to +85C 2.125 2.188 2.250 A MAX67 Y T = -40C to +85C 2.088 2.288 A T = 0C to +85C 1.620 1.665 1.710 A MAX67 W T = -40C to +85C 1.593 1.737 A T = 0C to +85C 1.530 1.575 1.620 A MAX67 V T = -40C to +85C 1.503 1.647 A 2 MAX6736MAX6745