Analog Devices Inc./Maxim Integrated MAX6833VXRD0+T

Overview

MAX6833VXRD0+T from Maxim Integrated is a push-pull active-high voltage supervisor IC designed for low-voltage microprocessor reset monitoring in 1.2V–1.8V systems. It features a factory-set 1.575V reset threshold (suffix V), 1.5ms reset timeout (suffix D1), guaranteed operation down to VCC = 0.75V, ±2.5% threshold accuracy over temperature, and ultra-low 7.5µA supply current-enabling reliable power-up/brownout detection in portable battery-powered equipment.

For engineers reviewing the MAX6833VXRD0+T datasheet, MAX6833VXRD0+T pinout, MAX6833VXRD0+T application, or MAX6833VXRD0+T equivalent, this device serves as a precision, low-power, single-supply reset solution with deterministic timing, manual reset support, and immunity to short VCC transients-critical for embedded controllers, IoT sensors, and wearables requiring stable initialization under varying supply conditions.

Technical Context

The MAX6833VXRD0+T implements a precision bandgap-based voltage comparator with internal hysteresis (0.75% of VTH) to reject fast VCC transients. Its push-pull active-high RESET output drives high (≥0.8×VCC) when asserted and low (≤0.2×VCC) when deasserted, eliminating external pullup requirements.

This variant belongs to the SC70-3 package group (VCC, GND, RESET pins only) and lacks MR or RESET-IN inputs-confirming it is a fixed-threshold, no-manual-reset, no-adjustable-threshold version. It supports full reset assertion validity down to VCC = 0.75V, enabling robust operation during deep brownout recovery.

Key Specifications

Pinout & Package

MAX6833VXRD0+T is housed in a 3-pin SC70-3 package (1.25mm × 0.85mm, 0.65mm pitch), with pin 1 = VCC, pin 2 = RESET, pin 3 = GND. No MR or RESET-IN terminals are present-this is a minimal-footprint, fixed-threshold supervisor optimized for space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6833VXRD0+T, MAX6316HUT46+T targets significantly lower voltage rails and lacks matching threshold/timing specs, while TPS3808G15DBVR adds MR capability at the cost of board area and pin count-neither serves as a drop-in replacement, but both address adjacent low-voltage supervision needs.

Availability

MAX6833VXRD0+T is available at Aetrix Electronics and suitable for battery-powered wearables, portable medical devices, low-voltage microcontroller systems, and energy-harvesting edge nodes requiring stable component supply with guaranteed RoHS-compliant lead-free packaging.

Supply support for MAX6833VXRD0+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 connectivity in demanding industrial, automotive, and consumer applications.

The MAX6832–MAX6840 family delivers ultra-low-voltage, low-quiescent-current reset supervision for next-generation portable and energy-constrained systems-prioritizing accuracy, small size, and supply independence.

FAQ

What is the exact reset threshold voltage of MAX6833VXRD0+T?

The MAX6833VXRD0+T has a factory-set reset threshold of 1.575V with ±2.5% accuracy over the full -40°C to +85°C operating temperature range. This value is defined by the "V" suffix in the part number and is laser-trimmed during production-no external adjustment is possible or required.

Does MAX6833VXRD0+T include a manual reset (MR) input?

No, MAX6833VXRD0+T does not include a manual reset input. As a 3-pin SC70-3 variant (VCC, RESET, GND), it omits MR functionality-unlike the 4-pin MAX6836/MAX6837 versions. Reset is triggered solely by VCC falling below 1.575V.

What is the reset timeout period for MAX6833VXRD0+T?

The MAX6833VXRD0+T uses the "D1" suffix, specifying a typical reset active timeout period of 1.5ms. This duration begins after VCC rises above 1.575V and ensures sufficient pulse width for reliable microprocessor initialization per industry standards.

Can MAX6833VXRD0+T operate with supply voltages below 1.2V?

Yes, MAX6833VXRD0+T guarantees valid active-high RESET output down to VCC = 0.75V. However, its reset detection function requires VCC ≥ 0.75V to assert reset; below that, the device ceases operation and RESET becomes undefined.

Is MAX6833VXRD0+T pin-compatible with older Maxim reset ICs like MAX809?

No, MAX6833VXRD0+T is not pin-compatible with MAX809. While the datasheet notes functional compatibility with MAX803/MAX809/MAX810 series, MAX6833VXRD0+T uses SC70-3 packaging (VCC-RESET-GND), whereas MAX809 uses SOT-23-3 with different pinout (VCC-GND-RESET). Board redesign is required.