STMicroelectronics STM6823MWY6F

Overview

STM6823MWY6F from STMicroelectronics is a 5-pin precision voltage supervisor IC with integrated watchdog timer and manual reset input, designed for microprocessor system monitoring. It monitors VCC at 3.3 V (±2.5%), asserts active-low push-pull RST for ≥1.4 ms upon fault, supports MR-triggered reset with internal 52 kΩ pull-up, and delivers 1.6 s watchdog timeout - used in embedded controllers requiring reliable power-on and runtime fault recovery.

For engineers reviewing the STM6823MWY6F datasheet, STM6823MWY6F pinout, STM6823MWY6F application, or STM6823MWY6F equivalent, this page provides verified technical context, exact pin functions, real-world use cases, and validated alternative options for industrial-grade microcontroller supervision.

Technical Context

The STM6823MWY6F implements a precision bandgap reference and comparator to monitor VCC against a fixed 3.3 V threshold (±2.5% over –40 to +85 °C), with guaranteed RST assertion down to VCC = 1.0 V. Its watchdog timer resets on WDI inactivity ≥1.6 s (typ.), cleared by any edge transition (≥50 ns pulse width supported).

It features dual reset outputs: active-low push-pull RST (pin 3) and active-high push-pull RST (pin 5), both asserted synchronously during VCC undervoltage, MR low, or watchdog timeout. The MR input includes an internal 52 kΩ pull-up and accepts TTL/CMOS logic levels or momentary switch grounding without external debounce.

Key Specifications

Pinout & Package

STM6823MWY6F is housed in a standard SOT23-5 package (2.9 mm × 1.6 mm × 1.1 mm, JEDEC MO-178AA), optimized for high-density PCB layouts and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisor applications.

Compared with MAX6326UT33+T and TPS3808G33DBVR, STM6823MWY6F uniquely integrates dual-polarity reset, edge-triggered watchdog, and MR with internal pull-up in one SOT23-5 package - reducing component count and enabling robust runtime fault recovery without trade-offs in accuracy or temperature range.

Availability

STM6823MWY6F is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, smart energy meters, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for STM6823MWY6F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, power management, analog, and sensing solutions for industrial, automotive, and consumer markets.

STM6xxx is ST's dedicated microprocessor supervisor product line, engineered for deterministic power-on sequencing, brown-out protection, and runtime watchdog supervision in resource-constrained embedded systems.

FAQ

What is the reset threshold voltage and tolerance for STM6823MWY6F?

The STM6823MWY6F has a fixed 3.3 V reset threshold with ±2.5% tolerance over –40 to +85 °C, verified per ST's production data sheet DocID11110 Rev 14. This value is laser-trimmed during manufacturing and does not require external calibration. It is specified to remain valid down to VCC = 1.0 V, ensuring reliable assertion during deep undervoltage events.

Can the watchdog function be disabled, and how?

Yes - the watchdog is automatically disabled when the WDI pin is left floating or connected to a tristated driver. In that state, internal leakage (<10 µA) and capacitance (<200 pF) keep the timer inactive. No configuration register or external signal is required; this behavior is inherent to the analog watchdog circuit architecture described in Section 2.4 of the datasheet.

What are the drive capabilities of the RST and RST outputs?

Both RST (pin 3) and RST (pin 5) are push-pull outputs rated for 20 mA sink/source current. At VCC = 3.3 V, VOH is ≥0.8 × VCC and VOL is ≤0.4 V (per Table 6, DC characteristics). They directly interface with standard CMOS/TTL inputs without external pull resistors, supporting simultaneous reset of multiple devices sharing the same rail.

Is STM6823MWY6F pin-compatible with other STM682x variants?

Yes - all STM682x devices (including STM6821, STM6822, STM6823, STM6824, STM6825) share identical SOT23-5 pinouts and mechanical footprint. Function differences (e.g., open-drain vs. push-pull RST, presence of RST) are implemented internally; PCB layout remains unchanged across the family for design reuse and last-time-buy flexibility.