Diodes Incorporated PT7M6125NLTA3EX

Overview

PT7M6125NLTA3EX from Pericom Semiconductor is a precision ultra-low-power voltage detector with 2.5V threshold, ±1.5% accuracy at 25°C, 0.9µA supply current at 3V, and N-channel open-drain active-low reset output in SOT23-3 package. It monitors power-rail integrity in battery-powered microcontrollers and embedded systems requiring reliable brownout detection.

For engineers reviewing the PT7M6125NLTA3EX datasheet, PT7M6125NLTA3EX pinout, PT7M6125NLTA3EX application, or PT7M6125NLTA3EX equivalent, key selection criteria include threshold tolerance over temperature (±2.5% typ), propagation delay (17µs), hysteresis (5%), operating voltage range (1.2–5.5V), and open-drain drive capability (1mA sink).

Technical Context

This device implements a precision bandgap reference and comparator with internally trimmed resistor networks to set fixed 2.5V trip thresholds. Its internal 5% hysteresis (VTH+ = VTH− × 1.05) prevents output oscillation during slow-rising or noisy supply transitions.

The N-channel open-drain output requires an external pull-up for logic-level compatibility and supports flexible reset assertion timing across diverse host systems. Designed for -40°C to +85°C operation, it maintains ±2.5% threshold accuracy across full temperature range without external calibration.

Key Specifications

Pinout & Package

SOT23-3 package (JEDEC MO-178AA compliant), 2.9mm × 1.3mm footprint, 1.45mm height, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PT7M6125NLTA3EX, TLV803EB25DBZR offers lower current but lacks hysteresis programmability and open-drain versatility, while APX803S-25SA-7 trades higher ICC for AEC-Q100 readiness-making PT7M6125NLTA3EX optimal for cost-sensitive industrial battery systems needing precision and design flexibility.

Availability

PT7M6125NLTA3EX is available at Aetrix Electronics and suitable for wearable health monitors, industrial sensor nodes, smart meter subsystems, and POS terminal power sequencing requiring stable component supply and long-term lifecycle support.

Supply support for PT7M6125NLTA3EX 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

Pericom Semiconductor (now part of Diodes Incorporated) specializes in high-performance interface, timing, and power management ICs for communications, computing, and consumer electronics.

PT7M61xx belongs to Pericom's ultra-low-power voltage detector product line, engineered specifically for reliable, low-cost power-rail monitoring in space-constrained portable and industrial embedded systems.

FAQ

What is the minimum supply voltage required for PT7M6125NLTA3EX to operate correctly?

The device operates down to 1.2V, enabling use with single-cell lithium or alkaline batteries. Below this voltage, internal bandgap reference and comparator cannot maintain specified threshold accuracy or output behavior. At 1.2V, supply current remains within datasheet limits (≤3.0µA), and propagation delay increases to ≤40µs per AC characteristics table.

Can PT7M6125NLTA3EX drive a 10kΩ pull-up resistor directly?

Yes-the open-drain output sinks up to 1mA at 0.3V (VOL) with VCC ≥ 2.5V, ensuring valid logic-low levels even with 10kΩ pull-up to 3.3V or 5V. This meets the recommended RIN < 10kΩ condition in the application example for stable reset assertion during brownout events.

How does the 5% hysteresis affect system reset behavior during supply recovery?

Hysteresis forces VCC to rise to 2.625V (2.5V × 1.05) before RST deasserts, preventing repeated toggling if the supply recovers slowly or exhibits ripple near the 2.5V threshold. This eliminates need for external RC filtering and ensures clean, single-pulse reset release after brownout recovery.

Is PT7M6125NLTA3EX pin-compatible with other PT7M61xx variants in SOT23-3?

Yes-all PT7M61xxNLTA3E variants share identical SOT23-3 pinout (VCC, GND, RST) and open-drain active-low output configuration. Only the detect threshold differs (e.g., PT7M6124NLTA3EX = 2.4V, PT7M6126NLTA3EX = 2.6V), allowing drop-in replacement when threshold adjustment is acceptable.