Diodes Incorporated PT7M6135NLC4EX

Overview

PT7M6135NLC4EX from Diodes Incorporated is an ultra-low-power N-channel open-drain voltage detector with 3.5V threshold (±1.5% at 25°C), 1μA supply current at 3.6V, and 17μs propagation delay, designed for battery voltage monitoring in portable electronics and power-rail supervision in embedded microcontroller systems.

For engineers reviewing the PT7M6135NLC4EX datasheet, PT7M6135NLC4EX pinout, PT7M6135NLC4EX application, or PT7M6135NLC4EX equivalent, key selection criteria include detection accuracy over temperature (±2.5% typ), hysteresis (3–6%), operating voltage range (1.2V–5.5V), and SC70-4 package compatibility with space-constrained PCB layouts.

Technical Context

The PT7M6135NLC4EX implements a precision bandgap reference (1.25V) and comparator with internally trimmed resistor networks to set VTH− = 3.5V and VTH+ = 3.675V (5% hysteresis). It asserts active-low reset when VCC falls below VTH− and releases only after VCC rises above VTH+.

Its N-channel open-drain output requires an external pull-up resistor and supports rail-to-rail operation across 1.2V–5.5V supply, enabling direct interface with 1.8V, 3.3V, and 5V logic domains while maintaining <0.3V VOL at 1mA sink current.

Key Specifications

Pinout & Package

PT7M6135NLC4EX is housed in a 4-pin SC70 (SOT343) package - compact (1.25mm × 1.25mm × 0.95mm), lead-free, and RoHS-compliant - optimized for high-density portable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB33DBZR and APX803L-33SA-7, PT7M6135NLC4EX provides higher threshold precision at 3.5V, open-drain configurability for mixed-voltage systems, and integrated hysteresis-making it optimal for battery-supervised designs requiring robustness across temperature and supply variance.

Availability

PT7M6135NLC4EX is available at Aetrix Electronics and suitable for wearable health monitors, industrial sensor nodes, USB-C power banks, and smart home hubs requiring stable component supply with guaranteed long-term sourcing.

Supply support for PT7M6135NLC4EX 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 PT7M61xx series was developed to replace discrete resistor-divider + comparator circuits in battery-powered and energy-sensitive applications, delivering factory-trimmed accuracy and ultra-low power in miniature packages.

FAQ

What is the function of the NC pin on PT7M6135NLC4EX?

The NC (No Connect) pin is internally unconnected and serves no electrical function. It must remain unconnected in the PCB layout-neither tied to VCC nor GND-to avoid parasitic coupling or mechanical stress on the die bond wire. This pin exists solely for package symmetry and thermal relief in the SC70-4 outline.

Can PT7M6135NLC4EX operate from a 1.5V alkaline cell?

Yes-PT7M6135NLC4EX operates down to 1.2V, making it functional across the full discharge curve of a single alkaline cell (1.5V fresh → 0.9V end-of-life). However, detection accuracy degrades below 1.8V, and RST assertion remains valid only while VCC ≥ 1.2V; below that, behavior is undefined.

How does hysteresis affect reset release timing?

Hysteresis sets VTH+ = 1.05 × VTH− = 3.675V. After reset assertion at 3.5V, the device holds RST low until VCC rises above 3.675V-preventing chatter during slow recovery or noisy supply conditions. This 175mV window eliminates need for external Schmitt-trigger circuitry.

Is PT7M6135NLC4EX qualified for automotive applications?

No-PT7M6135NLC4EX is specified for −40°C to +85°C ambient operation and is not AEC-Q200 qualified. While it meets industrial temperature requirements, automotive under-hood or infotainment applications require AEC-Q100-qualified alternatives such as the APX823 series with extended temperature and qualification testing.