Analog Devices Inc./Maxim Integrated MAX6807XR46

Overview

MAX6807XR46 from Maxim Integrated is a precision voltage detector IC designed for power-supply monitoring in microprocessor-based systems. It features a factory-preset 4.6V ±2% reset threshold, active-high push-pull RESET output, operates down to VCC = 1.2V, draws only 35µA supply current, and is housed in a 3-pin SC70 package - ideal for space-constrained battery-powered instrumentation and portable controllers.

For engineers reviewing the MAX6807XR46 datasheet, MAX6807XR46 pinout, MAX6807XR46 application, or MAX6807XR46 equivalent, this device serves as a low-power, high-accuracy supervisory solution for critical µP power sequencing, brownout detection, and reliable system initialization without external components.

Technical Context

The MAX6807XR46 implements a precision bandgap-based voltage comparator with internal hysteresis (VHYST = 0.02–0.03 × VTH−) to prevent output chatter near the 4.6V threshold. Its active-high RESET output is guaranteed logic-high for VCC ≥ 1.2V and asserts immediately upon VCC falling below VTH−, with ≤30µs delay at 1mV/µs slew rate.

It supports no external component operation, includes immunity to negative-going VCC transients up to 100µs (depending on overdrive), and maintains functional integrity across −40°C to +85°C - validated by 100% production testing at +25°C and design-guaranteed performance over full temperature range.

Key Specifications

Pinout & Package

MAX6807XR46 is supplied in a 3-pin SC70 package (outline 21-0075), with pin 1 = RESET (active-high), pin 2 = GND, pin 3 = VCC. No manual reset (MR) input is present - MR is exclusive to 4-pin SOT143 variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6806XR46-T and TLV803EB26DBZR, the MAX6807XR46 uniquely delivers active-high push-pull RESET at exactly 4.6V with guaranteed 1.2V operation - enabling simpler, more robust reset control in 5V µP systems without logic inversion or threshold compromise.

Availability

MAX6807XR46 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, intelligent instruments, critical µP and µC power monitoring, and industrial controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX6807XR46 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, computing, and communications applications.

The MAX6807 belongs to Maxim's precision voltage detector product line, engineered specifically for accurate, low-power power-supply monitoring in microprocessor-based systems where reliability and minimal external components are essential.

FAQ

What is the exact reset threshold voltage of the MAX6807XR46?

The MAX6807XR46 has a factory-preset nominal reset threshold of 4.60V, with guaranteed accuracy of ±2% (4.508V to 4.692V) at +25°C. This specification is maintained across the full operating temperature range (−40°C to +85°C) with a tempco of 30ppm/°C, ensuring consistent performance in industrial environments where supply rails must be monitored with high fidelity.

Does the MAX6807XR46 support manual reset functionality?

No, the MAX6807XR46 does not support manual reset. The MR (manual reset) input is only available on 4-pin SOT143 package variants (e.g., MAX6807US46-T). The MAX6807XR46 uses a 3-pin SC70 package with pins dedicated solely to RESET, GND, and VCC - making it a compact, cost-optimized solution for applications where only power-fail detection is required.

What is the minimum VCC voltage at which the MAX6807XR46 guarantees valid RESET output?

The MAX6807XR46 guarantees valid RESET output down to VCC = 1.2V. Specifically, its active-high RESET output is guaranteed to remain logic-high when VCC falls below the 4.6V threshold, and this assertion is specified and tested for VCC ≥ 1.2V. Below 1.2V, output behavior is not guaranteed - a key differentiator from the MAX6806/MAX6808 variants, which operate down to 1.0V.

Can the MAX6807XR46 be used with a 3.3V microcontroller reset pin?

Yes, the MAX6807XR46 is fully compatible with 3.3V µP reset inputs. Its active-high push-pull RESET output delivers VOH ≥ 0.8×VCC (e.g., ≥2.64V at VCC = 3.3V) when sourcing 20µA, well above standard 3.3V CMOS high-input threshold (typically ≥2.0V). No level-shifting circuitry is needed, simplifying integration into mixed-voltage systems.

How does the MAX6807XR46 handle power-supply transients?

The MAX6807XR46 is immune to short-duration negative-going VCC transients - it will not falsely assert RESET for pulses under specific overdrive/duration limits (e.g., ≤100µs for 50mV overdrive). This immunity is achieved via internal filtering and comparator design, and is further enhanced by placing a 0.1µF capacitor close to the VCC pin, making the MAX6807XR46 suitable for use with noisy switch-mode power supplies.