Analog Devices Inc./Maxim Integrated MAX6412UK30+

Overview

MAX6412UK30+ from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 3.0V VCC reset threshold, active-low push-pull reset output, manual reset input (MR), and capacitor-adjustable reset timeout. It monitors VCC from 1.0V to 5.5V, guarantees valid reset down to VCC = 1V, draws only 1.7µA typical supply current, and operates across –40°C to +125°C for automotive and industrial embedded controllers.

For engineers reviewing the MAX6412UK30+ datasheet, MAX6412UK30+ pinout, MAX6412UK30+ application, or MAX6412UK30+ equivalent, key selection criteria include its factory-trimmed 3.0V threshold accuracy (±2.5% over temperature), externally programmable timeout via SRT capacitor, MR pulse rejection (75ns), and guaranteed reset assertion during brownout conditions below 3.0V.

Technical Context

The MAX6412UK30+ implements a precision voltage comparator with laser-trimmed internal resistors to set its fixed 3.0V VCC reset threshold (VTH), with ±2.5% tolerance over –40°C to +125°C and 4mV hysteresis. Its reset timeout is generated by a 240nA internal current source charging an external capacitor (CSRT) to a 0.65V ramp threshold, enabling adjustable delay from 275µs (CSRT = 0) up to milliseconds.

It features a dedicated manual reset input (MR) with internal 20kΩ pullup, 1µs minimum pulse width support, and glitch rejection. The active-low push-pull RESET output drives logic-compatible loads with VOL ≤ 0.4V at ISINK = 3.2mA (VCC ≥ 4.5V) and VOH ≥ 0.8×VCC at ISOURCE = 800µA, ensuring reliable µP reset signaling under varying supply conditions.

Key Specifications

Pinout & Package

SOT23-5 package (5-pin, 2.9mm × 1.6mm, 1.1mm height), RoHS-compliant lead-free construction (indicated by '+' suffix), rated for 150°C junction temperature and reflow-solder compatible (260°C peak).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G30DBVR and STM6315SW30DX6F, the MAX6412UK30+ uniquely combines factory-trimmed 3.0V detection, capacitor-adjustable timeout, and integrated manual reset in a single SOT23-5 package-enabling design flexibility without sacrificing low-power operation or automotive-grade temperature performance.

Availability

MAX6412UK30+ is available at Aetrix Electronics and suitable for automotive engine control units, medical infusion pump controllers, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6412UK30+ 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 demanding industrial, automotive, and medical applications, emphasizing reliability, low power, and high integration.

The MAX6412–MAX6420 family delivers configurable µP supervision with capacitor-adjustable reset timing, targeting applications needing robust voltage monitoring and flexible reset behavior in harsh environments.

FAQ

What is the exact reset threshold voltage for MAX6412UK30+?

The MAX6412UK30+ has a factory-trimmed VCC reset threshold of 3.000V, with a tolerance of ±2.5% over the full operating temperature range (–40°C to +125°C). This value is confirmed in the Electrical Characteristics table of the official datasheet, where VTH is specified as 2.925V (min), 3.000V (typ), and 3.075V (max) at TA = –40°C to +125°C. The '30' suffix in MAX6412UK30+ directly references this 3.0V nominal threshold per Table 1.

Does MAX6412UK30+ support manual reset functionality?

Yes, MAX6412UK30+ includes a dedicated manual reset input (MR) on pin 4. Pulling MR low asserts the active-low RESET output for the full timeout period, even if VCC remains above threshold. The device integrates a 20kΩ internal pullup resistor, so MR can be left floating if unused or connected to a momentary switch to ground. MR pulse width must exceed 1µs, and it rejects glitches shorter than 75ns.

How is the reset timeout period set for MAX6412UK30+?

The reset timeout period for MAX6412UK30+ is set by connecting an external capacitor (CSRT) between pin 5 (SRT) and ground. The timeout follows tRP = (2.73 × 10⁶) × CSRT + 275µs, where tRP is in seconds and CSRT is in farads. For example, a 1500pF capacitor yields ~4.375ms timeout. Ceramic capacitors with leakage <10nA are recommended, and SRT traces must be short and isolated from noise sources.

What is the operating temperature range for MAX6412UK30+?

MAX6412UK30+ is fully specified from –40°C to +125°C ambient temperature. This rating is explicitly stated in the Ordering Information table and Absolute Maximum Ratings section of the datasheet. All electrical parameters-including reset threshold accuracy, supply current, and reset timeout-guarantee performance across this full industrial/automotive range, making it suitable for under-hood and enclosed industrial deployments.

Is MAX6412UK30+ pin-compatible with other devices in the MAX6412–MAX6420 family?

Yes, MAX6412UK30+ shares the identical SOT23-5 pinout (pin 1 = RESET, pin 2 = GND, pin 3 = VCC, pin 4 = MR, pin 5 = SRT) with all members of the MAX6412–MAX6420 family, including MAX6413UK30+, MAX6414UK30+, and MAX6418UK30+. This allows direct substitution within the same threshold and output-type group, provided the application requires the same reset polarity (active-low push-pull) and feature set (fixed VCC threshold + MR).