Analog Devices Inc./Maxim Integrated MAX6833VXRD0+

Overview

MAX6833VXRD0+ from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit in SC70-3 package, designed to monitor +1.575V supply voltage with ±2.5% threshold accuracy over temperature, 7.5µA typical supply current, and 1.5ms reset timeout period. It ensures reliable power-on reset and brownout protection for low-voltage digital systems including portable microcontroller applications.

For engineers reviewing the MAX6833VXRD0+ datasheet, MAX6833VXRD0+ pinout, MAX6833VXRD0+ application, or MAX6833VXRD0+ equivalent, key selection criteria include its active-high RESET output, factory-set 1.575V threshold (suffix V), SC70-3 footprint compatibility, guaranteed reset validity down to VCC = 0.75V, and immunity to short negative VCC transients.

Technical Context

The MAX6833VXRD0+ implements a precision bandgap-based voltage comparator with hysteresis (0.75% of VTH) to detect VCC drops below its factory-trimmed 1.575V threshold. Its internal timing circuit generates a fixed 1.5ms reset assertion window after VCC recovery or manual reset deassertion.

This device uses BiCMOS process technology (681 transistors), operates across -40°C to +85°C, and features an internal 20kΩ pullup on MR input-enabling momentary switch interfacing without external debounce. It asserts RESET high during fault conditions and maintains valid logic levels down to VCC = 0.75V with 10µA source capability.

Key Specifications

Pinout & Package

MAX6833VXRD0+ is housed in a 3-pin SC70 package (1.25mm × 0.85mm × 0.9mm height) with gull-wing leads, compatible with standard reflow soldering processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6833VXRD3+, the MAX6833VXRD0+ provides tighter timing alignment with fast-starting microcontrollers; compared with MAX809TRD1+, it delivers 3× lower quiescent current and correct 1.5V threshold targeting, eliminating risk of premature reset release in sub-2V systems.

Availability

MAX6833VXRD0+ is available at Aetrix Electronics and suitable for battery-powered medical devices, industrial PLC modules, portable instrumentation, and automotive body electronics requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for MAX6833VXRD0+ 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 solutions for industrial, computing, and communications markets.

The MAX6832–MAX6840 product line was engineered specifically for ultra-low-voltage microprocessor supervision in portable and energy-sensitive systems, addressing the need for sub-2V supply monitoring with nanoscale power consumption and minimal board area.

FAQ

What is the exact reset threshold voltage of MAX6833VXRD0+ and how is it trimmed?

The MAX6833VXRD0+ has a factory-trimmed reset threshold of 1.575V with ±2.5% accuracy over -40°C to +85°C. This value is laser-trimmed during wafer test to match the 'V' suffix in the part number and is verified per Electrical Characteristics table. The threshold remains stable across temperature due to integrated bandgap reference and hysteresis (0.75% of VTH). No external adjustment is possible on MAX6833VXRD0+ since it lacks RESET-IN functionality.

Does MAX6833VXRD0+ support manual reset, and what is the MR input behavior?

Yes, MAX6833VXRD0+ includes an active-low Manual Reset (MR) input with internal 20kΩ pullup to VCC. Pulling MR low forces immediate reset assertion, and reset remains active for the full 1.5ms timeout after MR returns high. The MR pin accepts CMOS-level signals and rejects glitches <100ns, making external debounce unnecessary. For unused MR, leave floating or tie to VCC-no external resistor required.

What is the minimum VCC voltage at which MAX6833VXRD0+ guarantees valid RESET output?

MAX6833VXRD0+ guarantees valid active-high RESET output down to VCC = 0.75V across the full -40°C to +85°C temperature range. At this voltage, the push-pull driver can still source 10µA while maintaining VOH ≥ 0.8×VCC. Below 0.75V, reset assertion is not guaranteed, distinguishing it from variants like MAX6832/MAX6835 that specify 0.55V minimum.

Can MAX6833VXRD0+ be used with supplies above 1.8V, and what is its absolute maximum rating?

Yes, MAX6833VXRD0+ operates with VCC from 0.75V to 3.6V and tolerates up to +6.0V on VCC pin per Absolute Maximum Ratings. While optimized for 1.2V–1.8V systems, it remains functional at 3.3V with increased supply current (16µA typical). However, its 1.575V threshold makes it unsuitable for monitoring 3.3V rails-use MAX809 or MAX6326 for higher-voltage supervision.

Is MAX6833VXRD0+ pin-compatible with other reset ICs, and which families does it replace?

MAX6833VXRD0+ is pin-compatible with the MAX803/MAX809/MAX810 series and MAX6711–MAX6713 family in SC70-3 footprint, enabling drop-in replacement where 1.575V threshold and active-high output are acceptable. It is not pin-compatible with 4-pin variants (e.g., MAX6836) or open-drain types (e.g., MAX6834). Always verify RESET polarity and timeout period before substitution.