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Industry's Most Highly Integrated Microprocessor Supervisor Circuits Provide Battery Backup and CE Gating
Note to Editor:
- The MAX16016/20/21/23/24 microprocessor (µP) supervisors provide power-supply monitoring and battery-control functions in µP systems.
- The devices integrate a variety of features including a µP reset circuit, backup-battery switchover, power-fail warning, watchdog input, and chip-enable (CE) gating.
- Available in small TQFN and TDFN packages, these supervisors save space while significantly improving system reliability and accuracy.
- The MAX16016/20/21/23/24 are ideal for point-of-sale (POS) terminals, industrial equipment, fax machines, computers, set-top boxes, and many other applications.
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SUNNYVALE, CA—February 16, 2009—Maxim Integrated Products (NASDAQ: MXIM) introduces the MAX16016/20/21/23/24 low-power (< 1.2µA), microprocessor (µP) supervisory circuits featuring precision power-supply monitoring and battery-control functions. Delivering optimal performance in small TQFN or TDFN packages, these supervisory circuits integrate a variety of features including a µP reset circuit, battery-backup switchover, power-fail warning, and chip-enable (CE) gating. Their high integration simplifies designs and minimizes the number of components required for power-supply monitoring. The MAX16016/20/21/23/24 are ideal for a wide variety of applications such as point-of sale (POS) terminals, industrial equipment, fax machines, computers, and set-top boxes.
To protect critical data, these devices automatically switch the real-time clock (RTC) or RAM power source to the backup battery when VCC falls below the reset threshold and VBATT. A reset output asserts when VCC is below the reset-threshold voltage and for at least 145ms after VCC returns above its threshold. This reset output prevents code-execution errors during power-up, power-down, and brownout conditions. Each device offers an active-low, push-pull reset or an active-low, open-drain reset. A power-fail comparator signals an interrupt when VPFI falls below 590mV or when VCC falls below the reset threshold.
The MAX16016/20/21/24 include a battery-on output during battery-backup mode; the MAX16016/20/21 also include a watchdog function that triggers a reset pulse whenever WDI remains high or low for longer than the watchdog-timeout period. The MAX16020/21/24 provide internal gating of the CE signals to prevent erroneous data from corrupting the CMOS RAM. The MAX16023/24 integrate a low-dropout regulator capable of delivering up to 100mA; a manual-reset input; and a user-adjustable reset input for monitoring a second voltage.
The MAX16016/20/21/23/24 consume only 1.2µA of quiescent current and operate from as low as 1.53V. Fully specified over the -40°C to +85°C extended temperature range, they are available in 8-/10-pin TDFN or 16-pin TQFN packages. Pricing starts at $2.48 (1000-up, FOB USA).
Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells high-performance semiconductor products. The Company reported revenue in excess of $2 billion for fiscal 2008. Maxim was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers' products. To date, it has developed over 5900 products serving the industrial, communications, consumer, and computing markets. For more information, go to www.maxim-ic.com.
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