Analog Devices Inc./Maxim Integrated MAX6835VXSD0+T

Overview

MAX6835VXSD0+T from Maxim Integrated is a 4-pin SC70 ultra-low-voltage microprocessor reset circuit with push-pull active-low RESET output, factory-set 1.575V reset threshold (suffix V), and 1.5ms reset timeout (suffix D1). It monitors +1.2V to +1.8V supplies in portable systems, asserts reset during brownout or manual trigger, and guarantees valid reset down to VCC = 0.55V. Designed for battery-powered µP power monitoring.

For engineers reviewing the MAX6835VXSD0+T datasheet, MAX6835VXSD0+T pinout, MAX6835VXSD0+T application, or MAX6835VXSD0+T equivalent, this page delivers verified electrical parameters, SC70-4 package mapping, debounced MR input behavior, reset timing accuracy, and real-world interface guidance for low-voltage embedded systems.

Technical Context

The MAX6835VXSD0+T implements a precision voltage comparator with ±2.5% threshold accuracy over -40°C to +85°C, paired with a fixed 1.5ms timeout timer triggered by VCC drop below 1.575V or MR assertion. Its internal 20kΩ MR pullup enables direct switch-to-ground connection without external components.

This variant belongs to the MAX6835 subgroup featuring push-pull active-low RESET, debounced MR input, and no RESET-IN pin-distinguishing it from MAX6838–MAX6840 (adjustable threshold) and MAX6833/MAX6836 (active-high output). It operates across full VCC range of 0.55V to 3.6V with 7.5µA typical supply current at 1.2V.

Key Specifications

Pinout & Package

MAX6835VXSD0+T uses the 4-pin SC70-4 package (1.3mm × 1.6mm, 0.65mm pitch), optimized for space-constrained portable designs. Pin 1 is GND, Pin 2 is RESET (push-pull active-low), Pin 3 is MR (debounced manual reset), and Pin 4 is VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6835VXSD0+T, MAX6381XR29D3+T targets higher-voltage rails and lacks manual reset, while TPS3123E18DBVR adds unnecessary watchdog features and raises threshold beyond 1.6V core requirements-making MAX6835VXSD0+T optimal for precision 1.575V, 1.5ms, MR-enabled low-voltage supervision.

Availability

MAX6835VXSD0+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered wearables, low-voltage microcontroller systems, and energy-harvesting IoT endpoints requiring stable component supply across extended production lifecycles.

Supply support for MAX6835VXSD0+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 management, sensing, and interface applications in industrial, automotive, and consumer markets.

MAX6835VXSD0+T belongs to the MAX6832–MAX6840 family of ultra-low-voltage reset supervisors-engineered specifically for reliable power monitoring in sub-1.8V portable and battery-operated systems.

FAQ

What is the exact reset threshold voltage of MAX6835VXSD0+T and how is it specified?

The MAX6835VXSD0+T has a factory-set reset threshold of 1.575V, with ±2.5% accuracy over the full operating temperature range (-40°C to +85°C). This value is defined by the "V" suffix in the part number per the Threshold Suffix Guide, and is guaranteed in the Electrical Characteristics table under VTH parameter for MAX6835. The threshold remains stable across VCC from 0.55V to 3.6V.

Does MAX6835VXSD0+T support manual reset, and what are its electrical requirements?

Yes, MAX6835VXSD0+T includes a debounced manual reset (MR) input on Pin 3. It features an internal 20kΩ pullup to VCC, accepts CMOS-compatible logic levels (VIH ≥ 0.7×VCC, VIL ≤ 0.3×VCC), and requires a minimum pulse width of 2µs. No external components are needed-simply connect a momentary switch from MR to GND for hardware reset capability.

What is the function and timing behavior of the RESET output on MAX6835VXSD0+T?

The RESET output on MAX6835VXSD0+T is a push-pull active-low signal (Pin 2). It goes LOW when VCC falls below 1.575V or MR is asserted, and remains LOW for exactly 1.5ms after VCC rises above threshold or MR is released. It drives CMOS inputs directly with VOL ≤ 0.2V at 200µA sink current, eliminating need for external pullup resistors.

Can MAX6835VXSD0+T operate reliably at very low supply voltages?

Yes, MAX6835VXSD0+T guarantees valid reset operation down to VCC = 0.55V. Below this level, the RESET output becomes high-impedance but remains predictable. Its 7.5µA typical supply current at 1.2V and ability to assert reset during deep brownout make it suitable for end-of-battery-life detection in coin-cell and primary battery applications.

How does MAX6835VXSD0+T differ from MAX6838VXSD0+T in terms of functionality and pinout?

MAX6835VXSD0+T monitors VCC directly with fixed 1.575V threshold and includes MR input on Pin 3, while MAX6838VXSD0+T replaces MR with RESET-IN (adjustable threshold input) and removes manual reset capability. Their pinouts differ: MAX6835 uses Pin 3 for MR and Pin 1 for GND; MAX6838 uses Pin 1 for RESET-IN and Pin 3 for GND-making them functionally and physically incompatible despite identical SC70-4 packaging.