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MAX6453UT29S Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX6453UT29S Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 10 page General Description The MAX6453–MAX6456 are low-power, dual-voltage µP supervisors featuring separate VCC reset and manu- al reset outputs. The dual outputs support both soft- system reset (interrupt) and hard-system reset (reboot) functions. The reset output asserts when any of the monitored voltages falls below its specified threshold and remains asserted for the reset timeout (140ms min) after all voltages exceed their respective reset thresh- olds. All devices are offered with nine factory-fixed reset thresholds for monitoring primary system voltages (VCC) from 1.8V to 5V and an adjustable reset input for monitoring a secondary system voltage down to 0.63V. Each device has a manual reset input, a VCC reset out- put, and a manual reset output. The MAX6453/ MAX6454 manual reset output asserts when the manual reset input is low. It remains asserted for the manual reset timeout period (140ms min) after the manual reset input transitions high. The MAX6453/MAX6354 manual reset input controls only the manual reset output and does not affect the VCC reset output. The manual reset input of the MAX6455/MAX6456 con- trols both the manual reset and VCC reset outputs. When the manual reset input is low for less than 3.3s (typ), only the manual reset output asserts and remains asserted for the manual reset timeout period (140ms min) after the manual reset input transitions high. If the manual reset input is low for at least 3.3s (typ), the reset output also asserts and remains asserted for the reset timeout peri- od (140ms min) after the manual reset input transitions high. This enhanced feature allows the implementation of a soft/hard-system reset combination. The MAX6453/MAX6455 have active-low push-pull reset and manual reset outputs, and the MAX6454/ MAX6456 have active-low open-drain reset and manual reset outputs. All devices are available in small SOT23- 6 packages and are fully specified over the extended temperature range (-40°C to +85°C). Applications Set-Top Boxes Consumer Electronics DVD Players Modems MP3 Players Industrial Equipment Automotive Medical Devices Features o Precision Factory-Set Reset Thresholds From 1.6V to 4.6V o Adjustable Threshold to Monitor Voltages Down to 0.63V o Manual Reset Input with Extended 3.36s Setup Period o Immune to Short Voltage Transients o Low 6µA Supply Current o Guaranteed Valid Reset Down to VCC = 1.0V o Active-Low RESET (Push-Pull or Open-Drain) Outputs o 140ms (min) Reset Timeout Period o Small SOT Package µP Supervisors with Separate VCC Reset and Manual Reset Outputs ________________________________________________________________ Maxim Integrated Products 1 GND VCC MROUT 16 MR 5 RSTIN RESET MAX6453 MAX6454 SOT23-6 TOP VIEW 2 34 GND VCC MROUT 16 MR 5 RSTIN RESET MAX6455 MAX6456 SOT23-6 2 34 Pin Configurations Ordering Information 19-2637; Rev 1; 4/03 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. PART TEMP RANGE PIN-PACKAGE MAX6453UT_ _S-T -40°C to +85°C 6 SOT23-6 MAX6454UT_ _S-T -40°C to +85°C 6 SOT23-6 MAX6455UT_ _S-T -40°C to +85°C 6 SOT23-6 MAX6456UT_ _S-T -40°C to +85°C 6 SOT23-6 Note: The “_” is a placeholder for the threshold voltage level of the devices. A desired threshold level is set by the part num- ber suffix found in Table 1. All devices are available in tape- and-reel only. There is a 2500-piece minimum order increment for standard versions (Table 2). Sample stock is typically held on standard versions only. Nonstandard versions require a minimum order increment of 10,000 pieces. Contact factory for availability. Selector Guide appears at end of data sheet. |
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