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MAX6747KA29 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX6747KA29 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 14 page General Description The MAX6746–MAX6753 low-power microprocessor (µP) supervisory circuits monitor single/dual system supply voltages from 1.575V to 5V and provide maxi- mum adjustability for reset and watchdog functions. These devices assert a reset signal whenever the VCC supply voltage or RESET IN falls below its reset thresh- old or when manual reset is pulled low. The reset output remains asserted for the reset timeout period after VCC and RESET IN rise above the reset threshold. The reset function features immunity to power-supply transients. The MAX6746–MAX6753 have ±2% factory-trimmed reset threshold voltages in approximately 100mV incre- ments from 1.575V to 5.0V and/or adjustable reset threshold voltages using external resistors. The reset and watchdog delays are adjustable with external capacitors. The MAX6746–MAX6751 contain a watchdog select input that extends the watchdog time- out period by 128x. The MAX6752/MAX6753 contain a window watchdog timer that looks for activity outside an expected window of operation. The MAX6746–MAX6753 are available with a push-pull or open-drain active-low RESET output. The MAX6746– MAX6753 are available in an 8-pin SOT23 package and are fully specified over the automotive temperature range (-40°C to +125°C). Applications Features o Factory-Set Reset Threshold Options from 1.575V to 5V in ~100mV Increments o Adjustable Reset Threshold Options o Single/Dual Voltage Monitoring o Capacitor-Adjustable Reset Timeout o Capacitor-Adjustable Watchdog Timeout o Min/Max (Windowed) Watchdog Option o Manual Reset Input Option o Guaranteed RESET Valid for VCC ≥ 1V o 3.7µA Supply Current o Push-Pull or Open-Drain RESET Output Options o Power-Supply Transient Immunity o Small 8-Pin SOT23 Packages µP Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay ________________________________________________________________ Maxim Integrated Products 1 WDI WDS GND 1 2 8 7 VCC RESET SWT SRT RESET IN (MR) ( ) ARE FOR MAX6746 AND MAX6747 ONLY. TOP VIEW 3 4 6 5 MAX6746– MAX6751 SOT23-8 Pin Configurations 19-2530; Rev 6; 4/11 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Note: “_ _” represents the two number suffix needed when ordering the reset threshold voltage value for the MAX6746/MAX6747 and MAX6750–MAX6753. The reset threshold voltages are available in approximately 100mV incre- ments. Table 2 contains the suffix and reset factory-trimmed voltages. All devices are available in tape-and-reel only. There is a 2500-piece minimum order increment for standard ver- sions (see Table 3). Sample stock is typically held on standard versions only. Nonstandard versions require a minimum order increment of 10,000 pieces. Contact factory for availability. Devices are available in both leaded and lead-free packaging. Specify lead-free by replacing “-T” with “+T” when ordering. /V Denotes an automotive qualified part. Medical Equipment Automotive Intelligent Instruments Portable Equipment Battery-Powered Computers/Controllers Embedded Controllers Critical µP Monitoring Set-Top Boxes Computers Ordering Information PART TEMP RANGE PIN-PACKAGE MAX6746KA_ _-T -40°C to +125°C 8 SOT23 MAX6746KA_ _/V+T -40°C to +125°C 8 SOT23 MAX6747KA_ _-T -40°C to +125°C 8 SOT23 MAX6747KA_ _/V+T -40°C to +125°C 8 SOT23 MAX6748KA-T -40°C to +125°C 8 SOT23 MAX6749KA-T -40°C to +125°C 8 SOT23 MAX6750KA_ _-T -40°C to +125°C 8 SOT23 MAX6750KA_ _/V+T -40°C to +125°C 8 SOT23 MAX6751KA_ _-T -40°C to +125°C 8 SOT23 MAX6752KA_ _-T -40°C to +125°C 8 SOT23 MAX6753KA_ _-T -40°C to +125°C 8 SOT23 MAX6753KA_ _/V+T -40°C to +125°C 8 SOT23 Selector Guide appears at end of data sheet. Typical Operating Circuit appears at end of data sheet. Pin Configurations continued at end of data sheet. |
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