Diodes Incorporated PT7M6140NLTA3EX

Overview

PT7M6140NLTA3EX from Pericom Semiconductor is a precision ultra-low-power voltage detector with 4.0 V threshold, ±1.5% accuracy at 25°C, 0.9 µA supply current at 3 V, and N-channel open-drain active-low reset output in SOT23-3 package. It monitors power rails in battery-powered microcontrollers, IoT sensors, and portable medical devices requiring reliable brownout detection.

For engineers reviewing the PT7M6140NLTA3EX datasheet, PT7M6140NLTA3EX pinout, PT7M6140NLTA3EX application, or PT7M6140NLTA3EX equivalent, key selection criteria include threshold tolerance over temperature (±2.5% typ), propagation delay (17 µs), hysteresis (5%), and compatibility with 1.2–5.5 V supply range.

Technical Context

This device implements a precision bandgap reference, comparator, and internally trimmed resistor network to set a fixed 4.0 V detection threshold (VTH−) with 5% hysteresis (VTH+ = 1.05 × VTH−). The open-drain output requires an external pull-up for system reset assertion.

It operates across −40°C to +85°C with guaranteed detection accuracy and supports fast transient response: typical propagation delay is 17 µs, and maximum timeout period is 200 µs. No external components are needed beyond the pull-up resistor for basic operation.

Key Specifications

Pinout & Package

SOT23-3 package (TA3): compact 2.9 mm × 1.3 mm footprint with 0.95 mm pitch; 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 TLV803EB40DBZR and APX803S-40SA-7, PT7M6140NLTA3EX delivers the lowest quiescent current (0.9 µA) and tightest threshold accuracy (±1.5%) in SOT23-3 open-drain format-critical for decade-long battery operation and precision brownout protection in safety-critical edge nodes.

Availability

PT7M6140NLTA3EX is available at Aetrix Electronics and suitable for wearable health monitors, smart metering modules, and industrial PLC I/O modules requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for PT7M6140NLTA3EX 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 timing, interface, and power management ICs for communications, computing, and industrial markets.

PT7M61xx belongs to Pericom's ultra-low-power voltage supervisor product line, designed specifically for battery-constrained and energy-harvesting applications where precision, stability, and nanoamp-level current are mandatory.

FAQ

What is the exact detect threshold voltage for PT7M6140NLTA3EX?

The PT7M6140NLTA3EX has a nominal detection threshold (VTH−) of 4.0 V, with ±1.5% accuracy at 25°C and ±2.5% typical variation across −40°C to +85°C. This value is laser-trimmed during manufacturing and does not require external adjustment.

Can PT7M6140NLTA3EX drive a microcontroller reset pin directly?

Yes-it features an N-channel open-drain output that sinks current when VCC falls below 4.0 V. A pull-up resistor (typically 10 kΩ to VCC or IOVDD) is required to generate a valid logic-high inactive state and ensure proper MCU reset signaling.

Does PT7M6140NLTA3EX require any external passive components?

No external capacitors or resistors are needed for basic voltage detection. Only an external pull-up resistor on the RST pin is required for open-drain operation. The internal hysteresis (5%) and bandgap reference eliminate all other external components.

How does the hysteresis function in PT7M6140NLTA3EX?

Hysteresis is fixed at 5%: reset deasserts only when VCC rises above VTH+ = 1.05 × VTH− = 4.2 V. This prevents repeated toggling during slow or noisy supply recovery and ensures clean, chatter-free reset release.