Diodes Incorporated PT7M6140CLTA3E

Overview

PT7M6140CLTA3E 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-used for battery voltage monitoring and microcontroller reset supervision in portable electronics.

For engineers reviewing the PT7M6140CLTA3E datasheet, PT7M6140CLTA3E pinout, PT7M6140CLTA3E application, or PT7M6140CLTA3E equivalent, key selection criteria include detection accuracy over temperature (±2.5% typ), 17 µs propagation delay, 5% internal hysteresis, and compatibility with 1.2–5.5 V supply rails.

Technical Context

The device integrates a precision bandgap reference, comparator, and internally trimmed resistor network to set a fixed 4.0 V trip point (VTH−), with hysteresis defined as VTH+ = 1.05 × VTH−. It operates across −40°C to +85°C with no external components required.

Reset assertion occurs when VCC falls below 4.0 V and clears only after VCC rises above 4.2 V (105% of threshold), ensuring immunity to supply noise. The open-drain output supports flexible pull-up configurations up to 5.5 V and sinks ≥4 mA at 2.5 V.

Key Specifications

Pinout & Package

SOT23-3 package: 1.3 mm × 2.9 mm × 1.0 mm body, lead-free and RoHS-compliant, thermal pad omitted, JEDEC MO-178AA compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB40DBZR, PT7M6140CLTA3E offers built-in hysteresis and lower sensitivity to supply noise; versus APX803S-40SA-7, it delivers 25% lower ICC-critical for multi-year battery life in maintenance-free devices.

Availability

PT7M6140CLTA3E is available at Aetrix Electronics and suitable for smart wearable power management, industrial sensor node supervision, and medical patch monitor reset control requiring stable component supply and long-term lifecycle continuity.

Supply support for PT7M6140CLTA3E 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) specialized in high-performance analog and mixed-signal ICs for timing, connectivity, and power management applications.

The PT7M61xx series was designed specifically for ultra-low-power voltage monitoring in battery-operated and energy-sensitive embedded systems-emphasizing accuracy, minimal current draw, and zero-component integration.

FAQ

What is the exact detection threshold voltage for PT7M6140CLTA3E?

The PT7M6140CLTA3E has a nominal detection threshold (VTH−) of 4.0 V, with ±1.5% accuracy at 25°C and ±2.5% typical accuracy over the full −40°C to +85°C operating range. This value is laser-trimmed during manufacturing and does not require external calibration.

Can PT7M6140CLTA3E be used with a 1.8 V supply rail?

No-while the device operates down to 1.2 V supply, its 4.0 V detection threshold requires the monitored rail to reach at least 4.0 V for proper reset release. It is unsuitable for supervising sub-4 V rails; instead, select PT7M6118CLTA3E (1.8 V threshold) for such applications.

Does PT7M6140CLTA3E require an external pull-up resistor on the RST pin?

Yes-the RST pin is an N-channel open-drain output and must be pulled up externally to a valid logic-high voltage (e.g., 3.3 V or 5 V). Recommended pull-up values range from 1 kΩ to 510 kΩ depending on rise time and bus loading requirements.

How does the internal hysteresis affect system behavior during supply recovery?

The internal hysteresis sets VTH+ = 4.2 V (105% of 4.0 V), so reset deasserts only after VCC rises above 4.2 V. This prevents repeated toggling during slow or noisy supply recovery and eliminates need for external hysteresis circuitry.