Diodes Incorporated PT7M7823STAEX

Overview

PT7M7823STAEX from Diodes Incorporated is a precision microprocessor (μP) supervisory circuit with push-pull RESET output, manual-reset input (MR), and watchdog timer (WDI) functionality. It features a 2.93V reset threshold (S-grade), 200ms reset pulse width, guaranteed RESET validity down to VCC = 1.0V, and operates across –40°C to +85°C. It is used in embedded systems requiring reliable power-on reset, brownout detection, and watchdog supervision of microcontrollers.

For engineers reviewing the PT7M7823STAEX datasheet, PT7M7823STAEX pinout, PT7M7823STAEX application, or PT7M7823STAEX equivalent, key selection criteria include its 2.93V threshold accuracy (±2.5% over temperature), debounced CMOS-compatible MR input, active-low push-pull RESET, integrated watchdog timeout (~1.6s), and SOT23-5 package compatibility with space-constrained industrial control and networking hardware.

Technical Context

The PT7M7823STAEX integrates three core functions: precise voltage monitoring with hysteresis (4mV for S-grade), a 200ms reset timeout generator triggered by power-up, brownout, or MR assertion, and a watchdog timer that resets the system if WDI remains static beyond ~1.6s. Its internal timebase ensures deterministic timing without external components.

It supports dual reset signaling: active-low push-pull RESET and complementary active-high RESET, both guaranteed functional at VCC ≥ 1.0V. The MR input includes an internal 35–75kΩ pull-up resistor and accepts CMOS-level transitions, while WDI detects edges as short as 150ns and disables watchdog when left floating or tri-stated.

Key Specifications

Pinout & Package

PT7M7823STAEX is packaged in a 5-pin SOT23 (TA code), surface-mount plastic package with 0.95mm pitch, optimized for automated assembly and thermal performance in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar μP supervisory applications.

Compared with APX823T-29SA-7 and TPS3808G33DBVR, PT7M7823STAEX uniquely combines 2.93V precision monitoring, push-pull RESET, debounced MR, and edge-triggered watchdog in a single SOT23-5 package - making it optimal for cost-sensitive, function-complete μP supervision where rail margin is tight and firmware reliability is critical.

Availability

PT7M7823STAEX is available at Aetrix Electronics and suitable for industrial PLC controllers, network router management units, smart surveillance cameras, and medical diagnostic handhelds requiring stable component supply and long-term design-in support.

Supply support for PT7M7823STAEX 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and communications markets.

The PT7M78xx family was designed specifically for μP system supervision - integrating voltage monitoring, reset generation, manual reset, and watchdog functions into minimal-footprint packages to reduce BOM count and improve power-rail reliability in embedded applications.

FAQ

What is the exact reset threshold voltage and tolerance for PT7M7823STAEX?

The PT7M7823STAEX has a nominal reset threshold of 2.93V (S-grade), with a guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +85°C. This value is specified in the DC Electrical Characteristics table under VRST, and applies to both falling-edge detection (brownout) and rising-edge release (power-up recovery) with 4mV hysteresis.

Does PT7M7823STAEX support manual reset and watchdog functions simultaneously?

Yes. PT7M7823STAEX supports concurrent manual reset (MR) and watchdog (WDI) functions. The MR input is debounced and CMOS-compatible, while WDI accepts edge-triggered signals to clear the internal 1.6s timer. Both can independently assert RESET, and their interactions are defined in the Functional Description section - for example, MR assertion clears the watchdog timer and initiates a new 200ms reset pulse.

What package type and pin count does PT7M7823STAEX use?

PT7M7823STAEX uses the TA package code, which corresponds to a 5-pin SOT23 (Small Outline Transistor) plastic package with 0.95mm lead pitch. Pinout is standardized: VCC, GND, RESET, MR, and WDI - confirmed in the Pin Configuration and Pin Description sections of the datasheet (Document 43008 Rev 2-4).

Is PT7M7823STAEX suitable for automotive applications?

No. PT7M7823STAEX is not qualified to AEC-Q100 or IATF 16949 standards. The datasheet explicitly states that automotive-grade variants require specific change control, PPAP capability, and manufacturing in IATF-certified facilities - and directs users to contact Diodes directly for such parts. This device is intended for industrial, networking, and consumer embedded applications only.