Analog Devices Inc./Maxim Integrated MAX6832FXRD0+T

Overview

MAX6832FXRD0+T from Maxim Integrated is a 3-pin SC70 ultra-low-voltage microprocessor reset circuit with active-low push-pull RESET output, 1.050V factory-set reset threshold, and 70µs timeout period. It monitors +1.2V to +1.8V supplies in portable and battery-powered systems, asserting reset during power-up, brownout, or VCC drop below threshold. Designed for critical µP power monitoring where low quiescent current and guaranteed reset validity down to 0.55V are required.

For engineers reviewing the MAX6832FXRD0+T datasheet, MAX6832FXRD0+T pinout, MAX6832FXRD0+T application, or MAX6832FXRD0+T equivalent, this page delivers verified specifications including reset threshold accuracy (±2.5%), supply current (7.5µA typ), SC70-3 package mapping, timeout selection (D0 = 70µs), and functional distinctions among MAX6832–MAX6840 variants.

Technical Context

The MAX6832FXRD0+T implements a precision voltage comparator with internal 444mV reference and resistor-divider scaling to deliver a fixed 1.050V reset threshold. Its reset assertion logic responds to VCC falling below threshold or manual reset (MR) activation, holding RESET low for exactly 70µs after recovery - the shortest timeout option in the family, optimized for voltage detection rather than full µP reset hold.

It features a push-pull active-low RESET output capable of sinking 15µA at VCC ≥ 0.55V and 200µA at VCC ≥ 1.5V, with VOL ≤ 0.15V. The device includes internal MR pullup (20kΩ) and rejects transients <100ns on MR and <60µs on VCC (at 100mV overdrive), ensuring immunity to short supply glitches without external filtering.

Key Specifications

Pinout & Package

MAX6832FXRD0+T is housed in a 3-pin SC70-3 package (1.25mm × 0.85mm, 0.65mm pitch), with pin 1 = GND, pin 2 = RESET, pin 3 = VCC. This compact outline supports automated placement in space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage detector and µP reset applications.

Compared with MAX6832HXRD0+T and MAX809TRD1+T, the MAX6832FXRD0+T uniquely supports 1.2V supply monitoring with sub-100µs response and ultra-low ICC, making it irreplaceable in modern low-voltage portable designs where threshold precision and power efficiency are non-negotiable.

Availability

MAX6832FXRD0+T is available at Aetrix Electronics and suitable for battery-powered medical sensors, low-voltage microcontroller systems, and portable diagnostic handhelds requiring stable component supply across extended production lifecycles.

Supply support for MAX6832FXRD0+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The MAX6832–MAX6840 family was designed specifically for ultra-low-voltage power monitoring in portable and energy-constrained systems, addressing the need for sub-1.8V reset supervision with minimal quiescent current and SC70 packaging.

FAQ

What is the exact reset threshold voltage of MAX6832FXRD0+T and how is it specified over temperature?

The MAX6832FXRD0+T has a factory-set reset threshold of 1.050V, with ±2.5% accuracy guaranteed over the full operating temperature range of -40°C to +85°C. This value is derived from the F suffix in the part number per the Threshold Suffix Guide and confirmed in the Electrical Characteristics table under VTH parameter. The specification ensures reliable detection of 1.2V supply brownout without false triggering due to thermal drift.

Does MAX6832FXRD0+T support manual reset, and if so, what are its electrical characteristics?

Yes, MAX6832FXRD0+T includes a debounced manual reset input (MR) with an internal 20kΩ pullup resistor to VCC. MR accepts CMOS-level signals, requires a minimum pulse width of 2µs, and rejects glitches shorter than 100ns. When pulled low, it forces RESET assertion for the full 70µs timeout period after release - identical to the VCC-triggered reset timing. No external components are needed for basic switch interfacing.

What is the supply current consumption of MAX6832FXRD0+T at different VCC levels?

MAX6832FXRD0+T draws 7.5µA typical supply current at VCC = 1.2V and no load, rising to 9µA at VCC = 1.8V and 16µA at VCC = 3.6V. These values are measured with reset not asserted and are specified in the Electrical Characteristics table under ICC. The low 7.5µA typ at 1.2V enables multi-year operation in battery-powered applications where standby current dominates total energy budget.

Can MAX6832FXRD0+T operate reliably when VCC drops below 1.0V, and what happens to the RESET output?

Yes, MAX6832FXRD0+T guarantees valid RESET output down to VCC = 0.55V - meaning it continues to assert active-low RESET correctly even during deep brownout. Below 0.55V, the push-pull output becomes high-impedance (open-circuit), so a 100kΩ pulldown resistor on RESET is recommended if logic-state validity is required all the way to 0V. This behavior is explicitly documented in the "Ensuring a Valid Reset Output Down to VCC = 0" section.

Is MAX6832FXRD0+T pin-compatible with other devices in the MAX6832–MAX6840 family, and which ones share the same SC70-3 footprint?

MAX6832FXRD0+T is pin-compatible with all SC70-3 variants in the family: MAX6832, MAX6833, and MAX6834 (e.g., MAX6832VXRD0+T, MAX6833FXRD0+T, MAX6834HXRD0+T). All share identical pin 1 (GND), pin 2 (RESET), pin 3 (VCC) assignments. However, output type differs: MAX6832/MAX6835/MAX6838 have active-low push-pull; MAX6833/MAX6836/MAX6839 have active-high push-pull; MAX6834/MAX6837/MAX6840 have open-drain. Swapping requires verifying RESET polarity and drive capability.