Diodes Incorporated PT7M7810STEX-1507

Overview

PT7M7810STEX-1507 from Diodes Incorporated is a precision microprocessor (μP) supervisor IC with 2.93V reset threshold voltage, 200ms reset pulse width, and manual-reset input-designed for power-up/brownout monitoring in embedded systems requiring guaranteed RESET assertion down to VCC = 1.0V. It provides reliable system initialization and fault recovery in networking and security equipment.

For engineers reviewing the PT7M7810STEX-1507 datasheet, PT7M7810STEX-1507 pinout, PT7M7810STEX-1507 application, or PT7M7810STEX-1507 equivalent, this page delivers verified functional identity, confirmed SOT23-3 package mapping, validated terminal roles, exact reset threshold tolerance (±2.5% over –40°C to +85°C), and real-world selection guidance against drop-in alternatives.

Technical Context

The PT7M7810STEX-1507 implements a dedicated reset generator with fixed 2.93V falling-edge threshold (VRN) and 200ms timeout period (tRS), operating across 1.0V–5.5V supply range. Its internal timer ensures reset remains asserted during power-up until VCC exceeds VRN and sustains for full tRS after threshold crossing.

No watchdog or WDI functionality is integrated-this part belongs to the PT7M7810 variant per Function Comparison Table, confirming absence of watchdog input and reset output inversion. Manual-reset (MR) is CMOS-compatible, internally pulled up (10–40kΩ), and debounced to prevent spurious triggers.

Key Specifications

Pinout & Package

PT7M7810STEX-1507 is housed in a 3-pin SOT23 plastic package (Ordering Info confirms "T" code), optimized for space-constrained PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with APX811S293TSG-13 and TPS3808G33DBVR, PT7M7810STEX-1507 offers the lowest BOM count and smallest PCB area for pure voltage-monitoring reset applications, with open-drain flexibility for multi-source reset arbitration-making it optimal for cost- and space-sensitive industrial designs where watchdog is unnecessary.

Availability

PT7M7810STEX-1507 is available at Aetrix Electronics and suitable for networking equipment, security systems, embedded industrial controllers, and server management modules requiring stable component supply and long-term industrial lifecycle support.

Supply support for PT7M7810STEX-1507 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for industrial, computing, communications, and consumer markets.

The PT7M78xx family targets high-reliability μP supervision in power-constrained embedded systems, emphasizing precision threshold accuracy, ultra-low quiescent current, and robust operation across extended temperature ranges.

FAQ

What is the function of the MR pin on PT7M7810STEX-1507?

The MR (Manual-Reset) pin is an active-low CMOS input with internal pull-up (10–40kΩ). Pulling MR low forces a reset pulse; RESET remains asserted for the full 200ms timeout after MR returns high. Leaving MR unconnected defaults to inactive (no reset), eliminating need for external components in basic applications.

Does PT7M7810STEX-1507 include a watchdog timer?

No. Per the Function Comparison Table and Block Diagram, PT7M7810 is explicitly designated as having no watchdog input (WDI) or watchdog functionality. It provides only power-on reset, brownout reset, and manual reset-making it simpler and lower-cost than watchdog-enabled variants like PT7M7823 or PT7M7825.

What package type does PT7M7810STEX-1507 use?

PT7M7810STEX-1507 uses the SOT23-3 package (Ordering Code "T"), a 3-pin surface-mount plastic transistor outline measuring 2.9mm × 1.6mm × 1.1mm. This compact, lead-free, RoHS-compliant package supports high-density PCB layouts and standard reflow soldering processes.

Can PT7M7810STEX-1507 operate with a 1.8V supply?

Yes. The device operates across 1.0V to 5.5V, and its RESET output is guaranteed functional down to VCC = 1.0V. At 1.8V, it maintains full reset assertion accuracy (2.93V threshold relative to VCC), though the absolute voltage margin shrinks-designers must ensure 1.8V rail stability exceeds 2.93V × (1 − 2.5%) = 2.857V to avoid false trips.