Analog Devices Inc./Maxim Integrated MAX6832VXRD3+T

Overview

MAX6832VXRD3+T from Maxim Integrated is a 3-pin SC70 ultra-low-voltage microprocessor reset circuit with 1.575V factory-set reset threshold, 30ms active timeout period (D2 suffix), push-pull active-low RESET output, and guaranteed operation down to VCC = 0.55V. It monitors +1.2V to +1.8V supplies in portable battery-powered systems and asserts reset during brownout or power-up sequencing.

For engineers reviewing the MAX6832VXRD3+T datasheet, MAX6832VXRD3+T pinout, MAX6832VXRD3+T application, or MAX6832VXRD3+T equivalent, key selection criteria include reset threshold accuracy (±2.5%), ultra-low 7.5µA supply current, SC70-3 package footprint, 30ms timeout timing, and compatibility with low-voltage µP reset inputs requiring active-low assertion.

Technical Context

The MAX6832VXRD3+T implements a precision bandgap-based voltage comparator with internal hysteresis (0.75% of VTH) to reject fast VCC transients. Its reset logic includes a fixed 30ms timeout counter triggered on VCC falling below 1.575V or MR assertion, with propagation delay under 60µs for VCC transitions.

This variant belongs to the MAX6832–MAX6837 group: it uses VCC as the monitored supply (not RESET-IN), features debounced MR input with 20kΩ internal pullup, and delivers push-pull active-low RESET capable of sinking 15µA at VCC ≥ 0.55V and 200µA at VCC ≥ 1.5V.

Key Specifications

Pinout & Package

MAX6832VXRD3+T is housed in a 3-pin SC70-3 package (1.25mm × 0.8mm, 0.65mm pitch), optimized for space-constrained portable designs. The package is RoHS-compliant and tape-and-reel delivered.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6832VXRD3+T, MAX809TRD3+T offers longer timeout and slightly higher threshold for 1.8V systems, while TPS3808G33DBVR targets higher-voltage rails with vastly lower current but cannot replace MAX6832VXRD3+T in 1.6V applications due to mismatched threshold range.

Availability

MAX6832VXRD3+T is available at Aetrix Electronics and suitable for battery-powered wearables, portable medical sensors, low-voltage microcontroller systems, and energy-harvesting edge nodes requiring stable component supply across extended production lifecycles.

Supply support for MAX6832VXRD3+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 in industrial, automotive, and consumer markets.

The MAX6832–MAX6840 family was engineered specifically for ultra-low-voltage µP reset supervision in portable equipment, emphasizing sub-10µA current, SC70 packaging, and factory-trimmed thresholds for 1.2V–1.8V supply rails.

FAQ

What is the exact reset threshold voltage of MAX6832VXRD3+T and how accurate is it over temperature?

The MAX6832VXRD3+T has a factory-set reset threshold of 1.575V with ±2.5% accuracy over the full -40°C to +85°C operating range. This value is confirmed in the Electrical Characteristics table under "Reset Threshold (VTH)" for suffix 'V', and applies directly to MAX6832VXRD3+T as indicated in the Threshold Suffix Guide and Standard Versions table.

Does MAX6832VXRD3+T include a manual reset (MR) input?

Yes, MAX6832VXRD3+T includes a debounced manual reset (MR) input with an internal 20kΩ pullup resistor to VCC. As specified in the Pin Description section for MAX6832/MAX6834 (SC70-3), MR is pin 2 on the SC70-3 package and functions as an active-low input that forces reset when pulled low.

What is the reset timeout period for MAX6832VXRD3+T and how is it selected?

The MAX6832VXRD3+T has a 30ms reset active timeout period, denoted by the 'D2' suffix in its ordering code. This is confirmed in Table 2 (Active Timeout Period Guide) where D2 corresponds to 30ms, and in the Ordering Information table where MAX6832_XRD_-T with D2 yields MAX6832VXRD3+T.

Can MAX6832VXRD3+T operate reliably at VCC = 0.55V?

Yes, MAX6832VXRD3+T guarantees valid reset assertion down to VCC = 0.55V for active-low output operation, as stated in the General Description and confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. Below 0.55V, the push-pull output enters high-impedance state.

Is MAX6832VXRD3+T pin-compatible with legacy Maxim reset ICs like MAX809?

Yes, MAX6832VXRD3+T is explicitly stated as pin-compatible with the MAX803/MAX809/MAX810 series in the Features section. Both use SC70-3 packaging with identical pin 1 (GND), pin 2 (RESET), pin 3 (VCC) assignments, enabling drop-in replacement where threshold and timeout match design requirements.