Diodes Incorporated PT7M6127NLC4EX

Overview

PT7M6127NLC4EX from Diodes Incorporated is a precision ultra-low-power voltage detector with N-channel open-drain active-low reset output, 2.7V detection threshold (±1.5% at 25°C), 1μA supply current at 3.6V, and 17μs propagation delay. It operates from 1.2V to 5.5V over –40°C to +85°C and is used in battery-powered microcontroller supervision and power-rail monitoring in portable instrumentation.

For engineers reviewing the PT7M6127NLC4EX datasheet, PT7M6127NLC4EX pinout, PT7M6127NLC4EX application, or PT7M6127NLC4EX equivalent, key selection criteria include detection accuracy over temperature, open-drain drive capability, hysteresis configuration (5%), and SC70-4 package compatibility with space-constrained PCB layouts.

Technical Context

The PT7M6127NLC4EX integrates a trimmed bandgap reference, comparator, and internal resistor network to set a precise 2.7V trip point (VTH−), with VTH+ = 1.05 × VTH− yielding 5% hysteresis. Its internal architecture eliminates external components for nominal voltage monitoring.

It asserts RST low when VCC falls below VTH− and releases RST only after VCC rises above VTH+, ensuring noise immunity during brown-out recovery. The device supports direct interface with microcontroller reset inputs requiring open-drain pull-down assertion.

Key Specifications

Pinout & Package

PT7M6127NLC4EX is housed in a 4-pin SC70 (SOT343) package - compact, surface-mount, and optimized for high-density layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with APX803S-27SA-7 and TLV803EB27DBZR, PT7M6127NLC4EX uniquely combines SC70-4 packaging, open-drain output, and ±1.5% accuracy-making it optimal for space-constrained designs requiring reset bus sharing and tight threshold control.

Availability

PT7M6127NLC4EX is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, wearables with OLED displays, and smart energy meters requiring stable component supply across extended product lifecycles.

Supply support for PT7M6127NLC4EX 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 and consumer markets.

The PT7M61xx series was designed specifically for ultra-low-power voltage supervision in battery-critical and space-constrained applications, emphasizing accuracy, minimal quiescent current, and robust thermal performance.

FAQ

What is the function of the NC pin on PT7M6127NLC4EX?

The NC (No Connect) pin is internally unconnected and serves solely as a mechanical placeholder in the SC70-4 package. It must not be soldered to any net; leaving it floating is acceptable, though grounding it may improve thermal dissipation in high-temperature layouts per Diodes' application guidance.

Can PT7M6127NLC4EX drive a 10kΩ pull-up resistor directly?

Yes. With VOL ≤ 0.3V at 1mA sink current and guaranteed RST low-state drive strength, PT7M6127NLC4EX can reliably assert reset with a 10kΩ pull-up to 3.3V or 5V, resulting in ≤33μA static current during reset assertion-well within its specified sink capability.

How does the 5% hysteresis affect system behavior during power-up?

The 5% hysteresis (VTH+ = 1.05 × VTH− = 2.835V) ensures RST remains asserted until VCC rises above 2.835V after falling below 2.7V. This prevents repeated toggling during slow-ramping supplies or noisy 3.3V rails, guaranteeing one clean release event per power cycle.

Is PT7M6127NLC4EX compatible with lithium thionyl chloride (LiSOCl₂) primary batteries?

Yes. Its 1.2V minimum operating voltage and 1μA typical supply current allow direct integration with LiSOCl₂ cells (nominal 3.6V, end-of-life ~2.0V), enabling long-term deployment in remote metering where reset must occur before the MCU enters undefined states near 2.7V.