DatasheetsPDF.com

MAX6345 Dataheets PDF



Part Number MAX6345
Manufacturers Maxim Integrated Products
Logo Maxim Integrated Products
Description 6-Pin uP Reset Circuit
Datasheet MAX6345 DatasheetMAX6345 Datasheet (PDF)

19-1568; Rev 2; 12/05 6-Pin µP Reset Circuit with Power-Fail Comparator General Description The MAX6342–MAX6345 family of microprocessor (µP) supervisory circuits monitors power supplies in digital sys tems. These devices significantly improve system reliabili ty and accuracy compared to separate ICs or discrete components. The MAX6342–MAX6345 provide factory-trimmed V CC reset threshold voltages from 2.33V to 4.63V and operate with supply voltages between +1V and +5.5V. A +1.25V threshold dete.

  MAX6345   MAX6345


Document
19-1568; Rev 2; 12/05 6-Pin µP Reset Circuit with Power-Fail Comparator General Description The MAX6342–MAX6345 family of microprocessor (µP) supervisory circuits monitors power supplies in digital sys tems. These devices significantly improve system reliabili ty and accuracy compared to separate ICs or discrete components. The MAX6342–MAX6345 provide factory-trimmed V CC reset threshold voltages from 2.33V to 4.63V and operate with supply voltages between +1V and +5.5V. A +1.25V threshold detector allows for a power-fail warning, for low-battery detection, or for monitoring another power supply. The MAX6342 contains an MR input and an active-low push-pull reset. The MAX6343 and MAX6344 are identical to the MAX6342 except they provide an active-low, open-drain reset and an active-high, pushpull reset, respectively. The MAX6345 provides a second reset output in place of the MR input to give it an activehigh push-pull reset and an active-low push-pull reset. All of the devices are packaged in a miniature 6-pin SOT23. ♦ Small 6-Pin SOT23 Package ♦ Precision Factory-Set VCC Reset Thresholds Between 2.33V and 4.63V ♦ Guaranteed RESET Valid to VCC = +1V ♦ 100ms min Reset Pulse Width ♦ Debounced CMOS-Compatible Manual-Reset Input ♦ Voltage Monitor for Power-Fail or Low-Battery Warning Features MAX6342–MAX6345 Ordering Information PART MAX6342_UT-T MAX6343_UT-T MAX6344_UT-T MAX6345_UT-T TEMP RANGE -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C PIN-PACKAGE 6 SOT23-6 6 SOT23-6 6 SOT23-6 6 SOT23-6 Applications Portable Computers Telecom Equipment Networking Equipment Portable/Battery-Powered Equipment Multivoltage Systems Embedded Control Systems Typical Operating Circuit appears at end of data sheet. Note: The MAX6342–MAX6345 are available with factory-set reset thresholds from 2.33V to 4.63V (see Selector Guides 1, 2). Insert the letter corresponding to the desired nominal reset threshold into the blank following the part number. There is a 2500 piece order increment required for the SOT package. SOT Top Marks table appears at end of data sheet. Devices are available in both leaded and lead-free packaging. Specify lead-free by replacing “-T” with “+T” when ordering. Pin Configurations TOP VIEW VCC 1 6 RESET (RESET) Selector Guide 1 SUFFIX RESET THRESHOLD (V) 4.63 4.38 3.08 2.93 2.63 2.33 L M T S R Z GND 2 MAX6342 MAX6343 MAX6344 5 MR PFI 3 ( ) ARE FOR MAX6344 ONLY. 4 PFO SOT23-6 Pin Configurations continued at end of data sheet. Selector Guide 2 PART MAX6342 MAX6343 MAX6344 MAX6345 PUSH-PULL RESET OUTPUT ✔ — — ✔ OPEN-DRAIN RESET OUTPUT — ✔ — — PUSH-PULL RESET OUTPUT — — ✔ ✔ MANUAL-RESET INPUT ✔ ✔ ✔ — 1 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. http://www.Datasheet4U.com 6-Pin µP Reset Circuit with Power-Fail Comparator MAX6342–MAX6345 ABSOLUTE MAXIMUM RATINGS VCC to GND ..............................................................-0.3V to +6V RESET, RESET (MAX6342/MAX6344/MAX6345) ......... -0.3V to (VCC + 0.3V) RESET (MAX6343)................................................... -0.3V to +6V MR, PFI, PFO ..............................................-0.3V to (VCC + 0.3V) Input Current, VCC ..............................................................50mA Output Current, RESET, RESET ..........................................50mA Continuous Power Dissipation (TA = +70°C) 6-Pin SOT23 (derate 4mW/°C above +70°C).............320mW Operating Temperature Range .........................-40°C to +125°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature Range (soldering, 10s)..................... +300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VCC = +1.0V to +5.5V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C and VCC = +3V.) (Note 1) PARAMETER Supply Voltage Range SYMBOL VCC TA = 0°C to +70°C TA = -40°C to +125°C VCC = 3V, TA = -40° to +85°C VCC = 5.5V, TA = -40° to +85°C No load VCC = 3V, TA = -40° to +125°C VCC = 5.5V, TA = -40° to +125°C TA = +25°C MAX634_L TA = -40°C to +85°C TA = -40°C to +125°C TA = +25°C MAX634_M TA = -40°C to +85°C TA = -40°C to +125°C TA = +25°C TA = -40°C to +85°C MAX634_T TA = -40°C to +125°C TA = +25°C MAX634_S TA = -40°C to +85°C TA = -40°C to +125°C TA = +25°C MAX634_R TA = -40°C to +85°C TA = -40°C to +125°C TA = +25°C MAX634_Z TA.


MAX6344 MAX6345 N25Q00AA


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)