Product category:
Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX16033-MAX16040 supervisory circuits
Edited by the Electronicstalk Editorial
Team on 29 August 2007
Small circuits simplify design process
MAX16033-MAX16040 supervisory circuits offer a microprocessor reset, battery-backup switchover, power-fail warning and chip-enable gating
Maxim Integrated Products has released the MAX16033-MAX16040 low-power, microprocessor supervisory circuits with precision power supply monitoring and battery control functions Optimised for performance in space-saving 2 x 2mm microDFN packages, these supervisory circuits offer a microprocessor reset, battery-backup switchover, power-fail warning and chip-enable gating, reducing the complexity and number of components for power-supply monitoring
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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The small size and high integration of the MAX16033-MAX16040 make them ideal for a wide variety of applications, including point-of sale equipment, industrial equipment, fax machines, computers and set-top boxes.
The MAX16033-MAX16040 automatically switch the RAM to the backup battery when Vcc falls below either the reset threshold or Vbatt.
These devices also assert a reset when Vcc is below the reset-threshold voltage for at least 150ms after Vcc returns above its threshold.
The MAX16033/MAX16037 feature a manual-reset input, and the MAX16036/MAX16040 feature an auxiliary user-adjustable reset input for monitoring a second voltage.
The MAX16034/MAX16038 include a watchdog function that triggers a reset pulse whenever WDI remains high or low for longer than the watchdog timeout period.
The MAX16035/MAX16039 feature a battery-on output during battery-backup mode.
The MAX16033-MAX16036 provide internal gating of the chip-enable signals to prevent erroneous data from corrupting the CMOS RAM.
Each device offers either an active-low, push-pull reset or an active-low, open-drain reset, and includes a power-fail comparator that signals an interrupt when Vpfi falls below 1.235V or when Vcc falls below the reset threshold.
The MAX16033-MAX16040 consume only 13uA of quiescent current and operate from as low as 1.2V.
Fully specified over the -40C to +85C extended temperature range, they are available in eight or 10-pin microDFN packages.
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