Analog Devices Inc./Maxim Integrated MAX6463XR46+T

Overview

MAX6463XR46+T from Maxim Integrated is an ultra-low-power voltage detector with active-low open-drain output, designed for precision supply monitoring in battery-powered systems. It features a factory-set 4.6V lower trip threshold (VTH− = 4.600V typ), ±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 MAX6463XR46+T datasheet, MAX6463XR46+T pinout, MAX6463XR46+T application, or MAX6463XR46+T equivalent, key selection criteria include its 4.6V detection threshold, SC70-3 package footprint, open-drain output compatibility with mixed-voltage logic, and guaranteed operation down to 1.2V supply while consuming sub-µA quiescent current.

Technical Context

The MAX6463XR46+T implements a precision bandgap reference and comparator with internally trimmed resistor networks to set its 4.6V VTH− threshold. Its internal 5% hysteresis (VTH+ = VTH− × 1.05 ≈ 4.83V) prevents output chatter during slow-rising or noisy supply transitions.

As a member of the MAX6461–MAX6466 family, it operates without external components and delivers immunity to short voltage transients-e.g., it ignores falling VCC glitches ≤15µs when overdriven by 100mV below VTH−. It is not a µP supervisory circuit with timeout; unlike MAX6464–MAX6466, it asserts output only on threshold breach with no minimum reset pulse width.

Key Specifications

Pinout & Package

MAX6463XR46+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm, 0.65mm pitch), optimized for space-constrained portable designs. Pin 1 is OUT, Pin 2 is GND, and Pin 3 is VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB46DBVR and TPS3801K46DBVR, MAX6463XR46+T uniquely combines 4.6V detection, 1.0µA ICC, ±2.5% accuracy over full −40°C to +125°C, and open-drain output-making it optimal for long-life, wide-temp, mixed-voltage embedded systems where layout simplicity and power efficiency are critical.

Availability

MAX6463XR46+T is available at Aetrix Electronics and suitable for portable medical devices, cellular phones, and battery-powered instrumentation requiring stable component supply with lead-free compliance and extended temperature support.

Supply support for MAX6463XR46+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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The MAX6461–MAX6466 product line was engineered for ultra-low-power voltage supervision in space- and energy-constrained portable electronics, delivering precision thresholds and robust transient immunity without external components.

FAQ

What is the exact voltage threshold of MAX6463XR46+T?

The MAX6463XR46+T has a factory-set lower trip threshold (VTH−) of 4.600V (typical) at +25°C, with guaranteed range of 4.485V to 4.715V over −40°C to +125°C per Table 1a. Its upper threshold (VTH+) is 4.830V (typical), resulting from internal 5% hysteresis (VTH+ = VTH− × 1.05). This precise 4.6V point makes MAX6463XR46+T ideal for monitoring 5V rails or Li-ion battery end-of-discharge conditions.

Does MAX6463XR46+T provide a reset timeout period?

No, MAX6463XR46+T does not include a reset timeout function. It is a voltage detector (not a µP supervisory circuit), so its output asserts immediately when VCC falls below VTH− and de-asserts as soon as VCC rises above VTH+. In contrast, MAX6464–MAX6466 variants offer a minimum 150ms reset timeout. For applications requiring guaranteed minimum reset pulse width, MAX6464XR46+T or MAX6466XR46+T should be selected instead of MAX6463XR46+T.

Can MAX6463XR46+T interface with a 1.8V microcontroller GPIO?

Yes, MAX6463XR46+T's active-low open-drain output is explicitly designed for mixed-voltage interfacing. Connect an external pullup resistor from the OUT pin to the 1.8V supply rail. When asserted, OUT sinks current and pulls to <0.4V (guaranteed at ISINK = 1.0mA); when de-asserted, the pullup defines the high level at 1.8V. This eliminates level shifters and is confirmed in the Applications Information section for MAX6463/MAX6466.

What package and pinout does MAX6463XR46+T use?

MAX6463XR46+T uses the SC70-3 package (2.0mm × 2.1mm, 0.65mm pitch) with pin 1 = OUT, pin 2 = GND, and pin 3 = VCC. This matches the "XR" ordering suffix defined in the Ordering Information table. The SC70-3 footprint provides board-area savings over SOT23-3 while maintaining compatibility with standard pick-and-place equipment and reflow profiles.

How does MAX6463XR46+T handle short voltage transients?

MAX6463XR46+T rejects short falling VCC transients due to internal design: at 100mV of threshold overdrive (i.e., VCC = VTH− − 100mV), it tolerates glitches up to ~15µs duration without asserting output, as shown in Figure MAX6461 toc04. This immunity stems from propagation delay characteristics and internal filtering-not external capacitors-making MAX6463XR46+T robust in noisy power environments like motor-driven or RF-intensive portable systems.