Diodes Incorporated PT7M6315US29D1TBEX

Overview

PT7M6315US29D1TBEX from Diodes Incorporated is a supervisory circuit designed to monitor V_CC in microprocessor and digital systems. It asserts an active-low open-drain RESET signal when supply voltage drops below 2.9V (±1.5% at 25°C) or upon manual reset assertion, with a factory-programmed 1.6ms typical reset timeout period. It operates across 1.0V–5.5V supply and -40°C to +85°C, supporting brownout detection and push-button reset in embedded power management.

For engineers reviewing the PT7M6315US29D1TBEX datasheet, PT7M6315US29D1TBEX pinout, PT7M6315US29D1TBEX application, or PT7M6315US29D1TBEX equivalent, key selection criteria include its 2.9V threshold accuracy, 1.6ms reset timeout, SOT143-4 open-drain output compatibility with higher-voltage pull-ups, and qualification for industrial-grade embedded systems requiring reliable power-on reset and brownout protection.

Technical Context

This device implements a precision voltage monitor with hysteresis (50mV typical) and an internal timing delay block to generate a fixed-duration reset pulse. Its resistor-divider-based threshold detection is factory-trimmed to 2.9V with ±1.5% initial accuracy and ±2.5% temperature drift over -40°C to +85°C.

The open-drain RST output supports level-shifting via external pull-up to voltages exceeding V_CC, while the debounced MR input accepts logic-low manual reset pulses as short as 1μs and holds reset for the full 1.6ms timeout after release - enabling robust push-button interface without external RC networks.

Key Specifications

Pinout & Package

PT7M6315US29D1TBEX is housed in a Pb-free, RoHS-compliant 4-pin SOT143 (TB) package with 1.3mm × 1.3mm footprint and 0.95mm height, optimized for space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US29D1+ and TPS3808G18DBVR, PT7M6315US29D1TBEX delivers optimal balance of industrial-grade accuracy, minimal footprint, and lowest system-level component count - especially where fixed 1.6ms reset timing and SOT143 space constraints dominate design priorities.

Availability

PT7M6315US29D1TBEX is available at Aetrix Electronics and suitable for industrial PLC I/O modules, smart meter power management, and POS terminal controllers requiring stable component supply with guaranteed long-term continuity.

Supply support for PT7M6315US29D1TBEX 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 embedded systems requiring precise, single-function power monitoring without external passive components.

FAQ

What is the exact reset threshold voltage for PT7M6315US29D1TBEX?

The PT7M6315US29D1TBEX has a factory-trimmed reset threshold of 2.9V with ±1.5% accuracy at 25°C. Over the full -40°C to +85°C operating range, the threshold variation is ±2.5% of the nominal value, resulting in a guaranteed range of 2.83V to 2.97V at room temperature and 2.76V to 3.04V across temperature extremes.

Can the RST output be pulled up to 5V while V_CC is at 3.3V?

Yes. The RST pin is an N-channel open-drain output rated for 7.0V maximum drain voltage. When V_CC = 3.3V, RST can be safely pulled up to 5V using an external resistor, enabling direct interface with 5V logic families without level translators or additional drivers.

Is manual reset debouncing handled internally?

Yes. The MR input includes built-in debouncing synchronized to the 1.6ms reset timeout period. A logic-low pulse as brief as 1μs on MR will assert reset and hold it active for the full 1.6ms duration after MR returns high, eliminating the need for external RC filters or firmware debounce routines.

What is the minimum supply voltage required for PT7M6315US29D1TBEX to function?

The device operates down to 1.0V V_CC. At this voltage, RST is guaranteed to remain low (≤0.09V) until V_CC falls below 1.0V, and the internal reference remains functional enough to detect threshold crossing - enabling reliable reset assertion even during deep brownout conditions.