MAX809MEUR-T

MAX809MEUR-T is Maxim’s MAX809 microprocessor supervisor (voltage monitor) in a European, tape‑and‑reel package. It continuously monitors Vcc and asserts a reset to a microcontroller when the supply falls below a fixed threshold, ensuring a clean start on power‑up and proper brown‑out protection.
Key features
- Fixed-threshold reset options (one of several available for different Vcc levels)
- Guaranteed reset pulse during power‑up and brown‑out
- Low quiescent current
- Single‑supply operation (typical range ~2.5–5.5V, depending on variant)
- Optional manual reset input and simple reset output
- RoHS compliant; packaged for tape & reel (suffix -T) in Europe
Typical applications
- Microcontroller reset for embedded systems
- Automotive, industrial, and consumer electronics requiring reliable MCU startup/reset during power fluctuations
Note: The -MEUR-T suffix denotes the Europe (MEUR) variant packaged in tape & reel (-T).

Equivalent products (voltage supervisor/reset ICs) from other vendors include:
- TI TLV803 family (e.g., TLV803, TLV803B)
- TI TPS3808 / TPS3809
- Microchip MCP1316 / MCP1317 / MCP1318
- Analog Devices ADM803 / ADM804
- On Semiconductor NCP301 / NCP302
These perform similar microcontroller reset/supervision with fixed thresholds and reset outputs.

Here are the typical features of MAX809MEUR-T (microprocessor supervisory/reset IC):
- Monitors supply voltage and asserts a reset during power-up, brown-out, or glitches.
- Reset output: active-low (RESETn) with clean, deterministic assertion/de-assertion.
- Manual reset input to force a reset externally.
- Optional watchdog timer (software activity monitoring) to trigger a reset if software fails to toggle.
- Small, low-power 8-pin package; RoHS-compliant; available in Tape & Reel (T) variant.
- Wide operating voltage and temperature range suitable for many MCU-based designs.
- Reliable, jitter-resistant reset with proper delays for safe MCU startup.
- Suitable for a broad range of microcontrollers and embedded applications.
Notes:
- Specific thresholds, timing, and package options vary by variant; refer to the exact datasheet for the MAX809MEUR-T you’re using to confirm numbers and pinout.

- Pin count: 8 pins (SOIC-8, MEUR package, Tape & Reel)
- Function: MAX809 voltage supervisor / reset generator. Monitors VCC and asserts an active-low RESET output when the supply is below its threshold or the manual reset (MR) input is asserted; provides a power-on reset delay to ensure proper MCU startup. The remaining pins are typically VCC, GND, MR, RESET and several no-connects depending on the specific variant.

- Manufacturer: Maxim Integrated (now part of Analog Devices).
- Company type: A semiconductor company that designs and manufactures analog and mixed-signal integrated circuits.

MAX809MEUR-T is a microprocessor supervisory circuit that monitors VCC and asserts a reset when the supply falls below its threshold, providing deterministic power-on reset (POR) and brown-out protection. It is used to ensure reliable MCU/PLD startup and operation during voltage dips. Typical applications include: reset generation for embedded controllers in consumer electronics, portable/battery-powered devices, automotive and industrial systems, telecom equipment, and any power-supply monitoring circuit requiring a clean reset signal.

MAX809MEUR-T is in an 8-pin μMAX (3×3 mm) package, supplied in Tape-and-Reel packaging.