Analog Devices Inc./Maxim Integrated MAX6461XR46+T

Overview

MAX6461XR46+T 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 factory-set 4.6V lower trip threshold (VTH−), ±2.5% threshold accuracy over −40°C to +125°C, 1.0µA supply current at 3.6V, and 17µs propagation delay. It is used in portable medical devices and cellular phones to ensure reliable power-on reset and brownout detection.

For engineers reviewing the MAX6461XR46+T datasheet, MAX6461XR46+T pinout, MAX6461XR46+T application, or MAX6461XR46+T equivalent, key selection criteria include its SC70-3 package, active-low push-pull output, 4.6V detection threshold with 5% hysteresis, and guaranteed operation across automotive-grade temperature range without external components.

Technical Context

The MAX6461XR46+T implements a precision bandgap reference and comparator-based detection architecture with internally trimmed resistor networks that fix VTH− at 4.6V (±2.5%) and set VTH+ = VTH− × 1.05 = 4.83V. Its internal 5% hysteresis prevents output chatter during slow-rising or noisy supply transitions.

This device belongs to the MAX6461–MAX6463 subfamily-voltage detectors (not supervisory circuits)-and therefore provides no reset timeout function. Its output asserts low when VCC falls below 4.6V and releases only after VCC rises above 4.83V, with propagation delay tightly specified at 17µs (typ) under 10mV/µs slew rate conditions.

Key Specifications

Pinout & Package

MAX6461XR46+T is housed in a 3-pin SC70-3 package (1.25mm × 0.85mm × 0.95mm height), fully specified for −40°C to +125°C operation. Pin 1 is OUT (active-low push-pull), Pin 2 is GND, and Pin 3 is VCC - matching JEDEC MO-203AA outline and compatible with standard SC70 reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB46DBZR and APX803S-46SA-7, the MAX6461XR46+T delivers superior thermal stability (±2.5% over −40°C to +125°C), integrated hysteresis, and proven reliability in automotive and medical designs - making it the preferred choice where long-term parametric consistency and noise immunity are critical.

Availability

MAX6461XR46+T is available at Aetrix Electronics and suitable for precision battery monitoring, portable medical devices, and noise-immune µP reset circuits requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6461XR46+T 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 U.S.-based semiconductor company specializing in high-performance analog and mixed-signal ICs for power, sensing, and communication applications.

The MAX6461–MAX6466 family was designed specifically for ultra-low-power voltage supervision in battery-operated and energy-constrained systems - delivering precision thresholds, nanoscale quiescent current, and robust operation without external components.

FAQ

What is the exact voltage threshold of MAX6461XR46+T and how is it specified?

The MAX6461XR46+T has a factory-set lower trip threshold (VTH−) of 4.60V with ±2.5% accuracy over the full −40°C to +125°C temperature range. Its upper trip point (VTH+) is 4.83V (5% hysteresis). These values are laser-trimmed during production and documented in Table 1a of the MAX6461–MAX6466 datasheet - no external adjustment is needed or supported for MAX6461XR46+T.

Does MAX6461XR46+T provide a reset timeout period like some supervisory ICs?

No, MAX6461XR46+T does not include a reset timeout function. It belongs to the MAX6461/MAX6462/MAX6463 voltage detector subfamily, which asserts output only based on instantaneous VCC comparison against VTH−/VTH+. In contrast, MAX6464–MAX6466 variants integrate a minimum 150ms reset timeout. For MAX6461XR46+T, output deasserts immediately once VCC exceeds 4.83V.

What is the output configuration of MAX6461XR46+T and can it drive CMOS inputs directly?

MAX6461XR46+T features an active-low push-pull output, meaning it actively drives low (≤0.4V at 9mA sink) when asserted and actively drives high (≥0.8×VCC) when released. This eliminates the need for an external pull-up resistor and allows direct interfacing with standard CMOS logic inputs - confirmed by VOH/VOL specs in the Electrical Characteristics table.

Is MAX6461XR46+T suitable for automotive applications?

Yes, MAX6461XR46+T is qualified for operation from −40°C to +125°C and manufactured in Maxim's automotive-capable process. While not AEC-Q200 certified out-of-box, its temperature rating, 5% hysteresis, and 1.0µA supply current make it widely deployed in automotive body electronics, infotainment power supervisors, and telematics modules where extended temperature performance is mandatory.

How does the 5% hysteresis in MAX6461XR46+T improve system reliability?

The 5% hysteresis in MAX6461XR46+T creates a 230mV window between VTH− (4.60V) and VTH+ (4.83V), preventing output oscillation when VCC lingers near the threshold due to ripple, noise, or slow ramp-up. This eliminates false resets in noisy environments - a critical advantage over comparators without built-in hysteresis, and one explicitly validated in the Transients Immunity section of the MAX6461–MAX6466 datasheet.