Diodes Incorporated PT7M7810STEX

Overview

PT7M7810STEX from Diodes Incorporated is a precision 2.93V microprocessor supervisory circuit in SOT23-3 package, featuring manual-reset input, 200ms reset pulse width, guaranteed RESET validity down to VCC = 1.0V, and operation across –40°C to +85°C. It monitors supply voltage during power-up/down/brownout and asserts active-low push-pull RESET to initialize µP systems in networking, embedded, and security applications.

For engineers reviewing the PT7M7810STEX datasheet, PT7M7810STEX pinout, PT7M7810STEX application, or PT7M7810STEX equivalent, this page delivers verified technical context, exact pin roles, real-world use scenarios, and validated alternative options for reliable system-level power supervision design.

Technical Context

The PT7M7810STEX implements a fixed-threshold voltage monitor with 2.93V nominal reset threshold (VRN), ±2.5% tolerance over –40°C to +85°C, and built-in hysteresis (50mV typical) to prevent chatter during threshold crossing. Its internal reset timer guarantees a 200ms (140–400ms) assertion period after VCC rises above VRN or MR release.

It includes a debounced CMOS-compatible manual-reset input (MR) with internal pull-up (10–40kΩ), but no watchdog timer or WDI input-confirmed by Function Comparison Table entry #3 and block diagram exclusions. RESET output is active-low push-pull, valid at VCC ≥ 1.0V, with VOL ≤ 0.4V at 3.2mA sink current.

Key Specifications

Pinout & Package

PT7M7810STEX is housed in a 3-pin SOT23-3 plastic package (Package Code T), with pin 1 = VCC, pin 2 = GND, pin 3 = RESET. The device has no NC or WDI pins - consistent with its manual-reset-only function per datasheet Function Comparison Table and block diagram.

Key Features

Applications

Equivalent & Alternatives

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

Compared with APX809S-29TSG-7 and TPS3808G18DBVR, PT7M7810STEX uniquely combines 2.93V precision threshold, integrated MR pull-up, and push-pull RESET in SOT23-3 - making it optimal for cost-sensitive 3.3V embedded systems needing field-serviceable reset capability without added passives.

Availability

PT7M7810STEX is available at Aetrix Electronics and suitable for industrial embedded controllers, network infrastructure equipment, and security system sensor hubs requiring stable component supply and long-term manufacturability support.

Supply support for PT7M7810STEX 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.

PT7M7810STEX belongs to the PT7M78xx family of µP supervisors designed specifically for simplified, low-component-count power monitoring in cost-sensitive embedded systems - emphasizing precision threshold accuracy, minimal external components, and industrial temperature operation.

FAQ

What is the exact reset threshold voltage and tolerance for PT7M7810STEX?

The PT7M7810STEX has a nominal reset threshold of 2.93V, with ±1.5% tolerance at 25°C and ±2.5% over the full operating temperature range of –40°C to +85°C. This is explicitly defined in the DC Electrical Characteristics table under VRST (Falling-edge) and confirmed by the suffix 'S' in the part number per the Ordering Information table.

Does PT7M7810STEX include a watchdog timer function?

No. PT7M7810STEX does not include a watchdog timer or WDI input. The Function Comparison Table (entry #3) and block diagram confirm it supports only power-on reset, brownout reset, and manual reset via MR - distinguishing it from variants like PT7M7811 or PT7M7823 which include WDI functionality.

What is the RESET output configuration and drive strength?

PT7M7810STEX features an active-low push-pull RESET output capable of sinking up to 3.2mA at VCC ≥ 4.5V (VOL ≤ 0.4V), 1.2mA at VCC ≥ 2.7V (VOL ≤ 0.3V), and 100µA at VCC ≥ 1.0V (VOL ≤ 0.3V). This eliminates the need for an external pull-up resistor in most µP interface applications.

Is PT7M7810STEX RoHS-compliant and lead-free?

Yes. PT7M7810STEX is fully RoHS-compliant (2015/863/EU), totally lead-free, and halogen/antimony-free ("Green" per Diodes' definition). This is confirmed in the Features section and supported by the "E" suffix designation in packaging notes, indicating Pb-free and green material construction.