MAX811SEUS+T

MAX811SEUS+T is a microprocessor supervisory circuit (voltage monitor) from Maxim Integrated. It monitors VCC and, when the supply is valid, releases the MCU’s reset; if VCC falls below its threshold or a manual reset is invoked, it asserts a reset to ensure the MCU starts in a known state. It provides a clean, POR/brown‑out protection without external components.
Key points:
- Outputs an active-low reset signal to the MCU.
- Includes a manual reset (MR) input for external reset pushbutton.
- Small package option (US) with tape-and-reel (+T) packaging.
- Low quiescent current; suitable for 1.8–5.5 V systems.
- Simple, reliable power-on reset with noise immunity.
Typical use: connect VCC to VDD, GND to GND, MR to a button (optional), and RESET# to the MCU reset input. Ideal for ensuring proper MCU startup during power-up and under supply dips. Packaging note: +T indicates Tape & Reel.

Equivalent parts (voltage supervisor/reset ICs) to MAX811SEUS+T:
- TI TLV803/TLV803B
- TI TPS3800/TPS3801/TPS3803
- Analog Devices ADM803/ADM803A
- ON Semiconductor CAT811
- Microchip MCP1316
These provide MCU reset on Vcc drop; choose by threshold, voltage range, and package to match MAX811 variants.

- Pin count: 8 pins (8-pin package, SEUS variant; tape-and-reel +T).
- Function: Microprocessor supervisory/reset device. Monitors Vcc and asserts a reset to the MCU during power-up/power-down or when Vcc is below the threshold; includes a manual reset input; provides a reset output (typically active-low) to hold the microcontroller in reset until the supply is stable.

- Manufacturer: Maxim Integrated (now part of Analog Devices).
- What kind of company: An American semiconductor company that designs and manufactures analog and mixed-signal integrated circuits.

Concise application areas of MAX811SEUS+T:
- Microcontroller and CPU reset supervision in embedded systems
- Power-on reset and brown-out protection for digital logic
- Manual reset interface via push-button
- Reset sequencing for FPGAs, DSPs, ASICs, and other high-speed logic
- Battery-powered/portable devices needing reliable startup/shutdown resets
- Consumer electronics, automotive, and industrial instrumentation requiring robust reset under supply variations

MAX811SEUS+T is in an 8-pin μSOP (micro-SOP) package; the “T” suffix indicates Tape & Reel packaging.