Texas Instruments LM3710XKMMX-463

Overview

LM3710XKMMX-463 from Texas Instruments is a microprocessor supervisory IC with precision 3.08V reset threshold, integrated watchdog timer (6.2ms timeout), power-fail comparator (1.225V reference), low-line output (1.02×VRST), and manual reset input. It operates from 1.0V to 5.5V VCC, consumes 28 µA quiescent current, and asserts active-low RESET down to 1.0V VCC - used in embedded controllers for reliable power-up/brownout recovery.

For engineers reviewing the LM3710XKMMX-463 datasheet, LM3710XKMMX-463 pinout, LM3710XKMMX-463 application, or LM3710XKMMX-463 equivalent, this page delivers verified functional identity, VSSOP-10 package mapping, confirmed 10-pin terminal roles, factory-programmed 3.08V/6.2ms timing, and two validated alternative supervisory ICs for supply monitoring and watchdog-critical systems.

Technical Context

The LM3710XKMMX-463 integrates five independent monitoring functions: a precision voltage detector (3.08V ±0.5% at 25°C), a separate 1.225V PFI comparator for external supply monitoring, an early-warning LLO comparator (1.02×VRST), a transition-sensitive WDI watchdog input, and a debounced MR input with 56 kΩ internal pull-up and 1.225V threshold. All comparators feature 0.0032×VRST hysteresis.

Its RESET output is active-low, asserted during VCC ramp-up/down, brownout, MR assertion, or WDI timeout. The reset timeout period (tRP = 6.2 ms) and watchdog timeout (tWD = 6.2 ms) are factory-programmed via part number suffix "-463", matching the E/F/G/H timeout group per SNVS150E Rev E. No external components are required for basic operation.

Key Specifications

Pinout & Package

VSSOP-10 (DGS) package: 3.0 mm × 3.0 mm body, 0.5 mm pitch, 1.1 mm max height, exposed pad not present, RoHS-compliant tin (SN) finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Compared with LM3710XKMMX-463, TPS3808G33DBVR offers longer watchdog timing but removes critical early-warning capability, while MAX6369KA29+T trades LLO/PFI functionality for thermal sensing - making LM3710XKMMX-463 uniquely balanced for dual-supply, NMI-enabled, fast-recovery systems.

Availability

LM3710XKMMX-463 is available at Aetrix Electronics and suitable for embedded controllers, automotive body electronics, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM3710XKMMX-463 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

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and low-power design.

The LM3710 series belongs to TI's microprocessor supervisory product line, engineered specifically for robust power monitoring, early fault detection, and deterministic reset sequencing in resource-constrained embedded systems.

FAQ

What is the exact reset threshold voltage and accuracy of the LM3710XKMMX-463?

The LM3710XKMMX-463 has a factory-trimmed reset threshold of 3.08V with ±0.5% accuracy at 25°C and ±2% over the full −40°C to +85°C operating range. This value is confirmed in the Electrical Characteristics table of SNVS150E Rev E and applies specifically to the "-463" variant, which corresponds to the standard 3.08V option in the LM3710 family.

Does the LM3710XKMMX-463 support operation below 1.8V VCC?

Yes, the LM3710XKMMX-463 operates down to 1.0V VCC and guarantees valid RESET assertion throughout that range. Its internal comparators and logic remain functional at 1.0V, and RESET stays active until VCC rises above 3.08V and remains stable for the 6.2 ms timeout period - a key differentiator for ultra-low-voltage brownout resilience.

How is the watchdog timeout period configured on the LM3710XKMMX-463?

The watchdog timeout period of the LM3710XKMMX-463 is factory-programmed to 6.2 ms and cannot be adjusted externally. This value is encoded in the part number suffix "-463", aligning with the E/F/G/H timeout group in the LM3710/LM3711 datasheet. No resistor or capacitor is required - the timing is fully internal and temperature-compensated.

Can the LM3710XKMMX-463 monitor two independent power supplies simultaneously?

Yes, the LM3710XKMMX-463 monitors VCC directly for reset and low-line detection while using its dedicated PFI pin - referenced to a stable 1.225V internal comparator - to independently supervise a second supply (e.g., battery, raw input, or auxiliary rail). This dual-path architecture avoids cross-loading and enables true independent fault detection per supply.

What is the function of the LLO pin on the LM3710XKMMX-463 and how does it differ from RESET?

The LLO (Low-Line Output) pin on the LM3710XKMMX-463 is an open-drain, active-low signal that asserts ~60 mV above the 3.08V reset threshold (i.e., at 1.02×VRST = 3.14V) to provide early warning of imminent power failure. Unlike RESET, which halts processor execution, LLO is intended to trigger a non-maskable interrupt (NMI) for controlled state save or graceful shutdown before RESET activates.