STM6778TGWB6F - Dual Microprocessor Reset Circuit

The STM6778TGWB6F from STMicroelectronics is a highly reliable, dual microprocessor supervisory circuit designed to monitor the power supplies in digital systems. It provides excellent protection for microprocessors by ensuring that the system's power-on reset is held active long enough to allow the system power supply to stabilize, and by monitoring the operation of the power supply during normal operation.

This component is particularly suitable for managing dual supply voltage systems with its ability to monitor two supplies without any external components. It ensures that both V<sub>CC1 and V<sub>CC2 are above the necessary thresholds before enabling the system to operate. The STM6778TGWB6F features precision monitoring of 3V, 3.3V, and 5V supply voltages with a low supply current, making it an energy-efficient choice for modern electronic applications.

The device includes a manual reset input, allowing for a hardware reset to be initiated, and comes in a compact 8-lead TSSOP package, perfect for space-constrained applications. It is designed with an active-low, open-drain reset output, which remains asserted for a period of 140ms (minimum) after all the supply voltages have stabilized. This ensures that the system's microprocessor and other ICs are reset reliably upon power-up or during operation, should any of the monitored supplies fall below their respective reset threshold voltages.

Key features of the STM6778TGWB6F include:

• Precision dual supply voltage monitoring
• Low supply current for energy efficiency
• Manual reset input for additional system control
• Active-low, open-drain reset output
• 140ms minimum reset pulse width
• Compact 8-lead TSSOP package for space-saving

Ideal for applications such as computers, controllers, intelligent instruments, and portable/battery-powered electronics, the STM6778TGWB6F ensures robust and reliable system operation by providing a critical protective function against power supply anomalies.