Формирователи импульса сброса MAX16021LTES+

Схема контроля микропроцессора , 0В-5.5В питание, выход сброса с активным высоким/низким

The MAX16021LTES+ is a low power µP supervisory circuit with battery backup circuit and chip enable gating in 16 pin TQFN package. It monitors power supplies and provides battery-backup control, chip enable (CE) gating to write protect memory in microprocessor (µP) based systems. This low power device improves system reliability by providing several supervisory functions in a small, single integrated solution. The MAX16021 performs four basic system functions such as it provides µP reset output during VCC supply power-up, power down and brownout conditions. It controls VCC to battery backup switching internally to maintain data or low power operation for memories, real time clocks (RTCs) and other digital logic when main power is removed. It also provides memory write protection through internal chip enable gating during brownout. The device operates from 1.53V to 5.5V supply voltage and offers fixed reset threshold of 4.684V for monitoring 5V, 3.3V, 3V, 2.5V and 1.8V systems.

• Operating voltage range from 0V to 5.5V
• Operating temperature range from -40°C to 85°C
• Supply current of 3.4µA (VCC = 5.5V, VCC > VTH) and supply current of 0.25µA in battery backup mode
• Reset timeout period of 215ms and watchdog timeout period of 1.235s
• Battery freshness seal
• Onboard gating of CE signals, 1.5ns propagation delay
• Active-high, push-pull
• active-low, push-pull reset output and debounced manual reset input
• Power fail comparator and low line indicator for monitoring voltages down to 0.6V
• Battery-on, battery-OK and battery test indicators

• UL certified to conform to IEC 60950-1 standard

Области применения

Мониторинг Системы, Промышленное, Потребительская Электроника, Переносные Устройства