MAX16023, MAX16024 Industry's Most Highly Integrated Microprocessor Supervisor Circuits Provide Battery Backup and CE Gating

• 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.

Low-Power μP Supervisors with CE Gating and Battery Backup

SUNNYVALE, CA—February 16, 2009—Maxim Integrated Products (NASDAQ: MXIM) introduces the MAX16016/MAX16020/MAX16021/MAX16023/MAX16024 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 V_CC falls below the reset threshold and V_BATT. A reset output asserts when V_CC is below the reset-threshold voltage and for at least 145ms after V_CC 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 V_PFI falls below 590mV or when V_CC 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.