Analog Devices Inc./Maxim Integrated MAX6832HXRD0+

Overview

The MAX6832HXRD0+ from Maxim Integrated is a low-voltage microprocessor supervisory circuit in a 3-pin SC70 package, designed to monitor +1.313V supply rails and assert an active-low push-pull reset signal during power-up, brownout, or VCC drop below threshold. It features ±2.5% reset threshold accuracy over temperature, 7.5µA typical supply current, and a 1.5ms reset timeout period (D1 suffix), enabling reliable reset generation in space-constrained portable systems.

For engineers reviewing the MAX6832HXRD0+ datasheet, MAX6832HXRD0+ pinout, MAX6832HXRD0+ application, or MAX6832HXRD0+ equivalent, this device serves as a precision voltage detector and µP reset controller for ultra-low-voltage digital systems requiring stable, low-power supervision with factory-trimmed thresholds and glitch-immune operation.

Technical Context

The MAX6832HXRD0+ implements a precision bandgap-based voltage comparator with 444mV internal reference, scaled by factory-trimmed resistor network to deliver a nominal 1.313V reset threshold (H suffix). Its reset assertion logic responds to VCC falling below threshold or manual reset input (MR) activation, holding RESET low for a fixed 1.5ms timeout after recovery.

It operates across -40°C to +85°C with guaranteed reset validity down to VCC = 0.55V, incorporates 20kΩ internal MR pullup, and rejects transients ≤100ns on MR and short negative VCC glitches via built-in hysteresis and propagation delay filtering.

Key Specifications

Pinout & Package

MAX6832HXRD0+ is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for high-density PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6832HXRD0+, MAX6316HUT46+T requires external pullup and lacks MR input, while TPS3123HDBVR trades transient immunity and MR support for lower ICC and longer timeout-making MAX6832HXRD0+ optimal for balanced performance in portable industrial controls.

Availability

MAX6832HXRD0+ is available at Aetrix Electronics and suitable for battery-powered IoT sensor nodes, industrial PLC I/O modules, medical wearable ECG front-ends, and automotive body control modules requiring stable component supply with guaranteed long-term availability.

Supply support for MAX6832HXRD0+ 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, computing, and communications markets.

The MAX6832–MAX6840 family was designed specifically for ultra-low-voltage microprocessor supervision in portable and battery-critical systems, delivering precision reset functionality in minimal SC70 footprints with industry-leading low ICC.

FAQ

What is the exact reset threshold voltage of the MAX6832HXRD0+ and how is it trimmed?

The MAX6832HXRD0+ has a factory-trimmed reset threshold of 1.313V with ±2.5% accuracy over -40°C to +85°C. This value corresponds to the 'H' suffix in the part number and is achieved using laser trimming of internal resistive networks during wafer sort, ensuring no external calibration is needed. The threshold remains stable across temperature due to matched bandgap reference design, and the MAX6832HXRD0+ datasheet specifies 1.275V (min) to 1.350V (max) at full operating range.

Does the MAX6832HXRD0+ include a manual reset input (MR), and what are its electrical characteristics?

Yes, the MAX6832HXRD0+ includes a dedicated MR pin (Pin 2 in SC70-3 pinout) with an internal 20kΩ pullup to VCC. It accepts CMOS-compatible logic levels: VIH ≥ 0.7×VCC and VIL ≤ 0.3×VCC. The MR input rejects glitches <100ns and requires a minimum pulse width of 2µs to trigger reset. When unused, MR may be left floating or tied to VCC; no external components are required for basic operation. This feature is confirmed in the Pin Description section for MAX6832/MAX6834 SC70-3 variants.

What is the reset timeout period for the MAX6832HXRD0+, and how is it selected?

The MAX6832HXRD0+ has a fixed 1.5ms reset timeout period, indicated by the 'D1' suffix embedded in the ordering code. This value is hard-coded in silicon and cannot be adjusted externally. The timeout begins when VCC rises above the 1.313V threshold or when MR is released, and guarantees RESET remains asserted for exactly 1.5ms to satisfy minimum reset pulse width requirements of modern low-voltage microcontrollers. Electrical Characteristics table confirms tRP = 1.0ms (min) to 2.0ms (max) for D1 option.

Can the MAX6832HXRD0+ operate reliably at VCC = 0.55V, and what happens to RESET output below that voltage?

Yes, the MAX6832HXRD0+ guarantees valid reset operation down to VCC = 0.55V - meaning RESET will correctly assert and maintain its active-low state as long as VCC stays ≥0.55V. Below 0.55V, the push-pull output stage ceases sinking current and becomes high-impedance; RESET may float undefined. For applications requiring valid RESET down to 0V, a 100kΩ pulldown resistor on the RESET line is recommended, as documented in the Applications Information section of the MAX6832–MAX6840 datasheet.

Is the MAX6832HXRD0+ pin-compatible with legacy Maxim supervisors like the MAX809 or MAX6712?

Yes, the MAX6832HXRD0+ is explicitly stated as pin-compatible with the MAX803/MAX809/MAX810, MAX6711/MAX6712/MAX6713, and MAX6381–MAX6390 series in the Features section of the datasheet. All share identical SC70-3 pinout (GND, RESET, VCC), enabling drop-in replacement in existing designs without PCB modification. However, note differences in reset threshold (e.g., MAX809 is 3.08V), so voltage compatibility must be verified per application.