MAX693ACSE+

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The MAX693ACSE+ is a voltage supervisor device from Maxim Integrated, a suitable choice for microprocessor-based system reset signal generation. It operates from a single 5V power supply and is designed to generate an active-low reset signal when the microprocessor supply voltage falls below a predetermined voltage. The MAX693ACSE+ is particularly suited for power supply monitoring and contains a wide range of additional features, such as a watchdog and a low battery detector.

The MAX693ACSE+ specifies the under-voltage lockout and reset behavior of microprocessor-based systems. It consists of an under-voltage detect circuit, a reset signal generator, a microprocessor reset active-low output and a reset time delay to accommodate slow power supply rise times. This device also contains an input voltage monitor and comparator, as well as an output inverter driver to ensure compliance with microprocessor reset system specifications.

The MAX693ACSE+ is based on a push-pull logic structure, enabling an active-low RESET signal to be issued when the monitored supply voltage drops below a preset level. It is designed with a guaranteed maximum RREET timeout delay at sub-5V levels and with a minimum reset hysteresis of 50mV to reduce power supply glitches.

The MAX693ACSE+ also includes a watchdog timer and a low battery detection circuit. The watchdog timer is used to generate a RESET pulse in case a microprocessor hangs due to software errors. Alternatively, the watchdog timer can be used to generate a system reset signal when the output of an internal timer expires. The low battery detection circuit can be used to detect a low voltage level and issue a RESET to preserve system data when operating from a battery backup.

In addition to the active low RESET output, the MAX693ACSE+ also provides an open-drain Power-Fail (PWRFAIL) output that indicates when the PWR supply is low. This can be used to generate system reset signals in parallel with RESET.

The MAX693ACSE+ is available in a space-saving 5-pin SOT-23 package and is suitable for use in a wide range of applications, such as personal computers, embedded controllers and consumer electronics.

Overall, the MAX693ACSE+ is an ideal choice for microprocessor-based system reset signal generation. It provides an active-low reset signal when the microprocessor supply voltage falls below a predetermined level and also integrates additional features such as a watchdog timer and a low battery detector. Available in a space-saving 5-pin SOT-23 package, the MAX693ACSE+ is well-suited for a variety of applications in the power supply monitoring field.

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