Analog Devices Inc./Maxim Integrated MAX6832HXRD0

Overview

MAX6832HXRD0 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 30ms 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 - ideal for battery-powered µP systems requiring reliable brownout protection.

For engineers reviewing the MAX6832HXRD0 datasheet, MAX6832HXRD0 pinout, MAX6832HXRD0 application, or MAX6832HXRD0 equivalent, this device serves as a precision voltage detector and reset generator for ultra-low-voltage digital systems where supply stability, timing predictability, and minimal quiescent power are critical selection criteria.

Technical Context

The MAX6832HXRD0 implements a precision bandgap-based voltage comparator with hysteresis (0.75% of VTH) to reject fast VCC transients up to 100ns, ensuring immunity to short negative glitches. Its internal reset timeout is fixed at 30ms (D2 suffix), generated by a temperature-stable RC oscillator independent of VCC.

This variant features a factory-set 1.313V reset threshold (H suffix), push-pull active-low RESET output, no MR input, and monitors VCC directly - distinguishing it from MR-enabled (XSD) or RESET-IN–equipped (XSD with adjustable threshold) variants in the same family.

Key Specifications

Pinout & Package

MAX6832HXRD0 is housed in a 3-pin SC70-3 package (1.25mm × 0.85mm, 0.95mm height) with gull-wing leads, optimized for high-density portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6832HXRD0, MAX809HTR extends reset hold time unnecessarily for modern µPs, while TPS3123HDBVR trades transient rejection capability for lower ICC - making MAX6832HXRD0 the optimal balance of speed, accuracy, and robustness in unfiltered 1.3V domains.

Availability

MAX6832HXRD0 is available at Aetrix Electronics and suitable for battery-powered IoT sensor nodes, wearable health monitors, low-voltage FPGA configuration monitors, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.

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, automotive, and communications applications.

The MAX6832–MAX6840 family was designed specifically to address ultra-low-voltage supervision needs in next-generation portable and energy-harvesting systems operating below 1.8V, with emphasis on precision, low ICC, and SC70 miniaturization.

FAQ

What is the exact reset threshold voltage of the MAX6832HXRD0 and how stable is it over temperature?

The MAX6832HXRD0 has a factory-set reset threshold of 1.313V with ±2.5% accuracy over the full -40°C to +85°C operating range. This specification is guaranteed by design and confirmed in the Electrical Characteristics table of the official datasheet. The threshold is derived from a precision bandgap reference and includes built-in hysteresis of 0.75% of VTH to prevent chatter near trip point. No external components or calibration are needed to achieve this stability.

Does the MAX6832HXRD0 include a manual reset (MR) input?

No, the MAX6832HXRD0 does not include a manual reset (MR) input. It belongs to the XRD variant group (3-pin SC70-3), which lacks MR functionality - unlike the XSD variants (4-pin SC70-4) such as MAX6835/MAX6836/MAX6837. The MAX6832HXRD0 monitors only VCC and asserts reset solely based on supply voltage drop below 1.313V or power-cycle events. Its pinout consists exclusively of GND, RESET, and VCC.

What is the reset timeout period for the MAX6832HXRD0 and how is it determined?

MAX6832HXRD0 has a fixed 30ms reset active timeout period, indicated by the "D2" suffix in its ordering code. This delay begins after VCC rises above the 1.313V threshold and ensures the reset signal remains asserted for exactly 30ms to satisfy µP power-on reset timing requirements. The timeout is generated by an internal RC oscillator and is specified as 20ms to 40ms (min/typ/max) across temperature and voltage - with 30ms being the typical value at +25°C.

Can the MAX6832HXRD0 operate with supply voltages below 1.313V?

Yes, the MAX6832HXRD0 functions down to VCC = 0.55V and guarantees valid active-low RESET output behavior throughout that range. Below 0.55V, the push-pull driver ceases sinking current and becomes high-impedance - but this is intentional, as most µPs are nonfunctional below ~0.6V. For applications requiring RESET validity down to 0V, a 100kΩ pulldown resistor on the RESET line is recommended, as documented in Figure 3 of the datasheet.

Is the MAX6832HXRD0 pin-compatible with other supervisory ICs like the MAX809 series?

MAX6832HXRD0 is pin-compatible with MAX803/MAX809/MAX810 in the 3-pin SC70-3 footprint, sharing identical GND–RESET–VCC pin assignments. However, due to differing package dimensions (SC70-3 vs. SOT-23), direct PCB replacement requires layout verification. Electrical compatibility exists for 1.3V threshold variants (e.g., MAX809H), but timeout period (30ms vs. 140ms) and supply current (7.5µA vs. 12µA) differ significantly - necessitating system-level validation before substitution.