Analog Devices Inc./Maxim Integrated MAX6461XR20+

Overview

MAX6461XR20+ from Maxim Integrated is a precision ultra-low-power voltage detector IC designed for battery and power-supply monitoring in space-constrained, low-current systems. It features a 2.0V nominal trip threshold (VTH−), 1.0µA supply current at 3.6V, 17µs propagation delay, ±2.5% threshold accuracy over −40°C to +125°C, and internal 5% hysteresis. It is used in portable medical devices and load-switching circuits where reliable, glitch-immune reset signaling is required.

For engineers reviewing the MAX6461XR20+ datasheet, MAX6461XR20+ pinout, MAX6461XR20+ application, or MAX6461XR20+ equivalent, this page delivers verified electrical parameters, SC70-3 package details, active-low push-pull output behavior, threshold hysteresis design implications, and real-world supervisory use cases - all confirmed against Maxim's official documentation.

Technical Context

The MAX6461XR20+ implements a precision bandgap reference and comparator with factory-trimmed resistor networks to set its 2.000V (±2.5%) lower trip threshold (VTH−) and 2.100V upper threshold (VTH+ = VTH− × 1.05). Its internal hysteresis prevents output chatter during slow or noisy VCC transitions near threshold.

It operates across the full industrial temperature range (−40°C to +125°C) with no external components required, and asserts its active-low push-pull output when VCC falls below VTH−, holding it asserted until VCC rises above VTH+. Propagation delay is guaranteed ≤17µs under defined slew-rate conditions.

Key Specifications

Pinout & Package

MAX6461XR20+ is housed in a 3-pin SC70-3 package (lead-free, RoHS-compliant), with pin 1 = OUT, pin 2 = GND, pin 3 = VCC. The small outline enables high-density PCB layouts while maintaining thermal performance up to +125°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB20DBZR and TPS3801K20DBVR, MAX6461XR20+ uniquely delivers 1.0µA supply current, ±2.5% accuracy over −40°C to +125°C, and integrated 5% hysteresis - making it optimal for extended-temperature, ultra-low-power, component-minimized designs.

Availability

MAX6461XR20+ is available at Aetrix Electronics and suitable for portable medical devices, battery-powered instrumentation, and automotive cabin electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6461XR20+ 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

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.

The MAX6461–MAX6466 family was engineered for ultra-low-power system supervision - targeting battery longevity, minimal board area, and robust operation in harsh thermal environments without external components.

FAQ

What is the exact threshold voltage of MAX6461XR20+ and how is it specified?

The MAX6461XR20+ has a nominal lower trip threshold (VTH−) of 2.000V, with ±2.5% accuracy guaranteed over the full −40°C to +125°C temperature range. Its upper threshold (VTH+) is fixed at 2.100V (VTH− × 1.05), providing 5% internal hysteresis. These values are factory-trimmed and documented in Table 1a and 1b of the MAX6461–MAX6466 datasheet - no external calibration is needed for MAX6461XR20+ deployment.

Does MAX6461XR20+ require any external components to function?

No, MAX6461XR20+ requires zero external components. Its precision bandgap reference, comparator, trimmed resistor network, and hysteresis circuit are fully integrated. The SC70-3 package contains only VCC, GND, and active-low push-pull OUT pins - eliminating resistors, capacitors, or trimming adjustments typically needed in discrete supervisor solutions.

What is the maximum supply voltage the MAX6461XR20+ can monitor?

MAX6461XR20+ monitors and operates from VCC = 1.2V to 6.0V. While its 2.0V threshold targets common low-voltage rails, the device remains functional and specifies absolute maximum ratings up to +7V on VCC. This headroom allows safe use in systems where transient overshoot may exceed nominal 5.5V maximum threshold options.

How does the 5% hysteresis in MAX6461XR20+ improve system reliability?

The 5% hysteresis in MAX6461XR20+ creates distinct rising (VTH+ = 2.100V) and falling (VTH− = 2.000V) thresholds, preventing output oscillation during slow or noisy supply recovery near the trip point. This eliminates need for external RC networks and ensures clean, chatter-free reset assertion - critical for microcontroller stability and EEPROM write integrity in MAX6461XR20+ applications.

Is MAX6461XR20+ compatible with lead-free PCB assembly processes?

Yes, MAX6461XR20+ is supplied in lead-free packaging compliant with RoHS and JEDEC J-STD-020 moisture sensitivity level (MSL) requirements. The "+" suffix explicitly denotes lead-free termination, qualified for standard reflow profiles including peak temperatures up to +260°C - matching industry-standard Pb-free assembly practices without derating or special handling.