Analog Devices Inc./Maxim Integrated MAX6463XR47+T

Overview

MAX6463XR47+T from Maxim Integrated is a precision ultra-low-power voltage detector IC with 4.7V lower trip threshold (VTH− = 4.700V typ), ±2.5% threshold accuracy over −40°C to +125°C, 1.0µA supply current at 3.6V, and 17µs propagation delay. It functions as a battery/PSU monitor in portable medical devices and cellular phones, asserting an active-low open-drain output when VCC falls below VTH− and releasing only after VCC exceeds VTH+ = 4.935V (5% hysteresis).

For engineers reviewing the MAX6463XR47+T datasheet, MAX6463XR47+T pinout, MAX6463XR47+T application, or MAX6463XR47+T equivalent, this page delivers verified functional identity, SC70-3 package mapping, confirmed 3-pin terminal roles, real-world timing behavior under transient immunity conditions, and validated alternative options for 4.7V reset supervision in space-constrained, battery-powered systems.

Technical Context

The MAX6463XR47+T implements a precision bandgap reference and comparator with internally trimmed resistor networks to set its factory-trimmed 4.7V detection threshold. Its internal 5% hysteresis (VTH+ = VTH− × 1.05) prevents output chatter during slow-rising or noisy supply rails.

As a member of the MAX6461–MAX6466 family's voltage detector subgroup (not µP supervisory), it provides no reset timeout function-output assertion follows instantaneous VCC crossing of VTH−/VTH+, with 17µs typical propagation delay on both rising and falling edges. Its open-drain output requires an external pullup for logic-level compatibility with hosts operating at voltages up to +6V.

Key Specifications

Pinout & Package

MAX6463XR47+T is housed in a 3-pin SC70-3 package with exposed pad (not electrically connected). Pin 1 = OUT (open-drain, active-low), Pin 2 = GND, Pin 3 = VCC. The device requires no external resistors or capacitors for basic operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB47DBZR and APX803S-47SA-7, MAX6463XR47+T uniquely combines 1µA current, ±2.5% accuracy across −40°C to +125°C, open-drain flexibility for mixed-voltage systems, and SC70-3 size - making it optimal for high-reliability, battery-critical designs where thermal margin and interface versatility are non-negotiable.

Availability

MAX6463XR47+T is available at Aetrix Electronics and suitable for portable medical devices, cellular handsets, and industrial sensor nodes requiring stable component supply with guaranteed long-term availability and lead-free compliance.

Supply support for MAX6463XR47+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) designs precision analog and mixed-signal ICs for power, sensing, and interface applications, with emphasis on ultra-low-power and high-reliability solutions.

The MAX6461–MAX6466 family was engineered specifically for battery-powered and space-constrained systems needing accurate, zero-component voltage supervision across harsh temperature environments.

FAQ

What is the exact voltage threshold and hysteresis of MAX6463XR47+T?

The MAX6463XR47+T has a factory-trimmed lower trip threshold (VTH−) of 4.700V (typical) at +25°C, guaranteed between 4.583V and 4.818V over −40°C to +125°C. Its upper trip threshold (VTH+) is exactly VTH− × 1.05, yielding 4.935V (typ), providing fixed 5% hysteresis to prevent oscillation near the trip point. This is confirmed in Tables 1a and 1b of the official datasheet.

Does MAX6463XR47+T provide a reset timeout period like the MAX6466 series?

No, MAX6463XR47+T does not include a reset timeout function. It is a pure voltage detector (per Selector Guide), with output assertion directly tied to VCC crossing VTH−/VTH+. In contrast, MAX6466-series parts guarantee a minimum 150ms reset pulse width regardless of how quickly VCC recovers. MAX6463XR47+T asserts and releases output within 17µs, making it suitable for instantaneous fault detection-not timed reset generation.

What package and pinout does MAX6463XR47+T use, and is it compatible with other SC70-3 voltage detectors?

MAX6463XR47+T uses the SC70-3 package (2.0mm × 2.1mm) with standard pinout: Pin 1 = OUT (open-drain, active-low), Pin 2 = GND, Pin 3 = VCC. While footprint-compatible with other SC70-3 voltage detectors, pin function alignment must be verified individually - for example, some competitors place VCC on Pin 1. Always confirm pin mapping against the MAX6463XR47+T datasheet before layout reuse.

Can MAX6463XR47+T interface with a 1.8V microcontroller while monitoring a 5V supply?

Yes, MAX6463XR47+T's open-drain output enables level shifting: connect the OUT pin to the 1.8V microcontroller's nRST line via a pullup resistor to 1.8V. When asserted, OUT sinks current to ground (VOL ≤0.4V at 9mA), delivering a valid logic low; when released, the 1.8V pullup defines a clean logic high. This decouples monitored rail voltage (5V) from host logic voltage (1.8V), a key design advantage confirmed in Applications Information section "Interfacing to Different Logic Voltage Components".

What is the maximum transient duration MAX6463XR47+T can ignore at its 4.7V threshold?

Per Figure MAX6461 toc04 (Maximum VCC Transient Duration vs. VTH− Threshold Overdrive), MAX6463XR47+T rejects falling VCC transients up to approximately 18µs wide when the overdrive ((VTH−) − VCC) is 100mV - i.e., when VCC dips to 4.6V. As the dip deepens (e.g., to 4.5V), the allowable pulse width shrinks. This transient immunity is intrinsic to the internal architecture and requires no external filtering components.