Diodes Incorporated PT7M6315US25D3TBEX

Overview

PT7M6315US25D3TBEX from Diodes Incorporated is a supervisory circuit designed to monitor V_CC in microprocessor and digital systems, asserting an open-drain active-low reset signal when supply voltage drops below 2.5V (±1.5% at 25°C) or upon manual reset assertion, with a 200ms typical reset timeout period. It operates from 1.0V to 5.5V, supports -40°C to +85°C ambient, and is packaged in SOT143-4 for embedded power-up sequencing and brownout protection.

For engineers reviewing the PT7M6315US25D3TBEX datasheet, PT7M6315US25D3TBEX pinout, PT7M6315US25D3TBEX application, or PT7M6315US25D3TBEX equivalent, key selection criteria include factory-trimmed 2.5V threshold accuracy, 200ms reset timeout, open-drain output compatible with pull-up voltages exceeding V_CC, and SOT143-4 footprint compatibility with space-constrained industrial control and IoT edge nodes.

Technical Context

This device implements a precision voltage monitoring function using an internal bandgap reference and resistor divider network to detect V_CC crossing of the 2.5V threshold with ±1.5% accuracy at 25°C and ±2.5% over temperature. Hysteresis is fixed at 50mV to prevent chatter during threshold transitions.

The reset logic combines analog detection with a digitally timed delay block that guarantees minimum 140ms and typical 200ms reset pulse width after V_CC recovery or MR deassertion. The MR input features debounced response synchronized to the internal timing engine, eliminating external RC filtering.

Key Specifications

Pinout & Package

PT7M6315US25D3TBEX is housed in a Pb-free, RoHS-compliant 4-pin SOT143 (TB) package measuring 2.9mm × 1.3mm × 1.0mm, optimized for high-density PCB layouts in compact industrial and consumer electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809TRD3+T and TPS3808G33DBVR, PT7M6315US25D3TBEX uniquely delivers factory-trimmed 2.5V detection, integrated MR debouncing, and SOT143-4 packaging-enabling drop-in replacement in existing 2.5V µP reset designs without layout or firmware changes.

Availability

PT7M6315US25D3TBEX is available at Aetrix Electronics and suitable for industrial PLC controllers, smart metering modules, IoT edge sensor nodes, and medical diagnostic handhelds requiring stable component supply and long-term production continuity.

Supply support for PT7M6315US25D3TBEX 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 consumer markets.

The PT7M6315US series belongs to Diodes' supervisory IC product line, engineered specifically for cost-sensitive, space-constrained applications requiring precise, single-function reset generation with minimal external components.

FAQ

What is the exact reset threshold voltage and tolerance for PT7M6315US25D3TBEX?

The PT7M6315US25D3TBEX has a factory-trimmed nominal reset threshold of 2.5V, with ±1.5% accuracy at 25°C and ±2.5% over the full -40°C to +85°C operating temperature range. This is confirmed in the DS42224 Rev 3-2 datasheet Section 4, Table 1, under V_TH- specification.

Can the RST output be pulled up to a voltage higher than V_CC?

Yes-the RST pin is an open-drain N-channel output rated for 7.0V maximum drain voltage. It can be safely pulled up to any voltage ≤7.0V, including rails higher than V_CC (e.g., 5V pull-up on a 3.3V V_CC system), enabling level translation in mixed-voltage designs without additional logic.

What is the minimum V_CC required for RST to be guaranteed low during power-up?

RST is guaranteed logic low (≤0.4V) once V_CC reaches 1.0V, per the datasheet's "Function Description" section. This ensures early and reliable reset assertion even during very slow power ramp-ups common in battery-powered or energy-harvesting systems.

Is PT7M6315US25D3TBEX qualified for automotive applications?

No-PT7M6315US25D3TBEX is specified for industrial temperature range (-40°C to +85°C) and is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., PT7M6315US25D3Q) with PPAP support and IATF 16949 manufacturing, but this specific TBEX suffix denotes commercial/industrial grade only.