Analog Devices Inc./Maxim Integrated MAX6832VXRD0+

Overview

MAX6832VXRD0+ from Maxim Integrated is a low-voltage microprocessor supervisory circuit in a 3-pin SC70 package, designed to monitor +1.575V supply rails with ±2.5% threshold accuracy over temperature, assert active-low push-pull reset during brownout or power-up, and deliver 70µs timeout for voltage detection-used in portable µP systems requiring reliable power-on reset at ultra-low supply current.

For engineers reviewing the MAX6832VXRD0+ datasheet, MAX6832VXRD0+ pinout, MAX6832VXRD0+ application, or MAX6832VXRD0+ equivalent, key selection considerations include its fixed 1.575V reset threshold, 70µs timeout period (D0 suffix), SC70-3 footprint, 7.5µA typical supply current, and guaranteed reset validity down to VCC = 0.55V.

Technical Context

The MAX6832VXRD0+ implements a precision bandgap-based voltage comparator with 444mV internal reference, comparing VCC against factory-trimmed threshold (1.575V) to trigger reset assertion when supply drops below threshold. It features built-in hysteresis (0.75% of VTH) to prevent chatter during slow-rising/falling VCC transitions.

Its reset logic includes a fixed 70µs timeout counter that holds RESET low after VCC recovers above threshold, ensuring stable processor initialization. The device operates across -40°C to +85°C with no external components required and ignores transients <100ns on VCC due to internal glitch rejection.

Key Specifications

Pinout & Package

MAX6832VXRD0+ is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm height), optimized for space-constrained portable designs. Pin 1 is GND, Pin 2 is RESET (active-low push-pull output), and Pin 3 is VCC - no MR or RESET-IN pins are present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6832VXRD0+, MAX809TRD1+ offers longer timeout but less precise alignment with 1.6V rails, while TPS3123E15DBVR reduces current draw by ~50% but sacrifices the critical 70µs fast-reset capability needed for responsive embedded boot sequences.

Availability

MAX6832VXRD0+ is available at Aetrix Electronics and suitable for battery-powered sensor nodes, low-voltage microcontroller reset circuits, portable medical monitors, wearable health trackers, and industrial controllers requiring stable component supply with lead-free compliance and tape-and-reel packaging.

Supply support for MAX6832VXRD0+ 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 consumer applications.

The MAX6832–MAX6840 family was designed specifically for ultra-low-voltage microprocessor supervision in space- and power-constrained portable electronics, targeting 1.2V–1.8V supply domains with minimal external components.

FAQ

What is the exact reset threshold voltage of the MAX6832VXRD0+?

The MAX6832VXRD0+ has a factory-set reset threshold of 1.575V with ±2.5% accuracy over the full -40°C to +85°C temperature range. This value is confirmed in the Electrical Characteristics table under "Reset Threshold (VTH)" for suffix 'V', and applies specifically to the MAX6832VXRD0+ variant-not other members of the MAX6832–MAX6840 family.

Does the MAX6832VXRD0+ include a manual reset (MR) input?

No, the MAX6832VXRD0+ does not include a manual reset input. As indicated in the Pin Description section and Selector Guide, only MAX6835/MAX6836/MAX6837 variants feature MR functionality. The MAX6832VXRD0+ is a 3-pin device with GND, RESET, and VCC only-no MR pin is present or supported.

What is the meaning of the 'D0' suffix in MAX6832VXRD0+?

The 'D0' suffix in MAX6832VXRD0+ specifies a 70µs reset timeout period, as defined in Table 2 ("Active Timeout Period Guide"). This is the shortest available timeout and functions as a voltage detector rather than a traditional power-on reset timer-ideal for fast-response applications like sensor wake-up or low-latency microcontrollers.

Can the MAX6832VXRD0+ operate reliably below 1.0V?

Yes, the MAX6832VXRD0+ guarantees valid reset operation down to VCC = 0.55V, as stated in the Absolute Maximum Ratings and Electrical Characteristics tables. Its push-pull active-low RESET output remains functional and sinks current down to this level, enabling safe shutdown sequencing in deep brownout conditions.

Is the MAX6832VXRD0+ pin-compatible with older Maxim supervisors like MAX809?

No, the MAX6832VXRD0+ is not pin-compatible with MAX809 series devices. While both use 3-pin packages, MAX809 uses SOT-23-3 with pinout GND–VCC–RESET, whereas MAX6832VXRD0+ uses SC70-3 with pinout GND–RESET–VCC. Swapping them requires PCB layout revision due to reversed VCC/RESET pin positions.