Analog Devices Inc./Maxim Integrated MAX6832HXRD3

Overview

MAX6832HXRD3 from Maxim Integrated is a low-voltage microprocessor supervisory circuit in a 3-pin SC70 package, designed to monitor +1.313V supply rails with ±2.5% threshold accuracy over temperature and assert an active-low push-pull reset signal for 210ms after VCC recovery or manual reset release. It draws only 7.5µA typical supply current and guarantees valid reset output down to VCC = 0.55V, making it suitable for battery-powered µP systems requiring reliable power-on reset and brownout protection.

For engineers reviewing the MAX6832HXRD3 datasheet, MAX6832HXRD3 pinout, MAX6832HXRD3 application, or MAX6832HXRD3 equivalent, this device serves as a precision voltage detector and reset generator for 1.2V–1.8V digital systems-especially where space-constrained SC70 packaging, ultra-low quiescent current, and fixed 210ms timeout are critical selection criteria.

Technical Context

The MAX6832HXRD3 implements a precision bandgap-based voltage comparator with hysteresis (0.75% of VTH) to reject fast VCC transients, and integrates a fixed 210ms timeout timer triggered on VCC fall below 1.313V or MR assertion. Its push-pull RESET output drives CMOS logic directly without external pullup, sinking ≥15µA at VCC ≥ 0.55V while maintaining VOL ≤ 0.15V.

This variant belongs to the MAX6832–MAX6837 group with factory-set threshold (H suffix = 1.313V), no RESET-IN input, and no debounced MR-MR is present but not debounced. It shares pin compatibility with MAX809 and MAX6712, and operates across –40°C to +85°C with guaranteed functionality down to VCC = 0.55V.

Key Specifications

Pinout & Package

MAX6832HXRD3 is housed in a 3-pin SC70 package (1.25mm × 0.85mm, 0.65mm pitch), with pins arranged in standard SC70-3 top-view orientation: Pin 1 = GND, Pin 2 = RESET (push-pull active-low), Pin 3 = VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6832HXRD3, MAX809TRD3 offers longer timeout but higher current and looser threshold spec, while TPS3123E13DBVR delivers superior accuracy and lower ICC in a mechanically compatible but electrically distinct SOT-23-3 package-requiring layout review but enabling extended battery life in new designs.

Availability

MAX6832HXRD3 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, wearable fitness trackers, smart energy meters, and other applications requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for MAX6832HXRD3 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, communications, and computing markets.

The MAX6832–MAX6840 family was designed specifically to address ultra-low-voltage reset supervision in space- and power-constrained digital systems-targeting 1.2V–1.8V core supplies in portable, battery-operated, and energy-harvesting applications.

FAQ

What is the exact reset threshold voltage of the MAX6832HXRD3?

The MAX6832HXRD3 has a factory-set reset threshold of 1.313V, with ±2.5% accuracy over the full –40°C to +85°C operating temperature range. This value is confirmed in the Threshold Suffix Guide (H = 1.313V) and Electrical Characteristics table under VTH parameter for MAX6832/MAX6835/MAX6838 variants. The threshold remains stable due to internal bandgap reference and hysteresis of 0.75% of VTH.

Does the MAX6832HXRD3 include a manual reset input (MR)?

Yes, the MAX6832HXRD3 includes an active-low manual reset input (MR) on Pin 3 (VCC) - wait, correction: MR is not present on MAX6832HXRD3. Per Pin Description and Ordering Information, MAX6832/MAX6833/MAX6834 are SC70-3 variants without MR; only MAX6835/MAX6836/MAX6837 (SC70-4) include MR. Therefore, MAX6832HXRD3 has no MR pin - its function set is VCC, GND, and RESET only.

What is the reset timeout period for MAX6832HXRD3?

The MAX6832HXRD3 features a fixed 210ms reset active timeout period, indicated by the "D3" suffix in the part number per the Active Timeout Period Guide. After VCC rises above 1.313V or after MR (if present) is released, RESET remains asserted for exactly 210ms before deassertion - a value validated across temperature and process corners per the datasheet's tRP specification.

Can MAX6832HXRD3 operate below 1.2V supply voltage?

Yes, the MAX6832HXRD3 is fully specified to operate down to VCC = 0.55V, with guaranteed reset assertion and valid push-pull output behavior. Its internal circuitry remains functional and RESET remains asserted as long as VCC stays below 1.313V, even at 0.55V - a key capability for brownout recovery in low-power systems where supply may sag transiently.

Is MAX6832HXRD3 pin-compatible with other supervisory ICs?

Yes, MAX6832HXRD3 is pin-compatible with the MAX809 series (e.g., MAX809TRD3) and MAX6712 family in SC70-3 package - sharing identical pinout: Pin 1 = GND, Pin 2 = RESET, Pin 3 = VCC. This enables drop-in replacement in existing layouts where timing and threshold tolerances align, though design validation is recommended due to differences in timeout duration and ICC.