Analog Devices Inc./Maxim Integrated MAX6316LUK46BX+

Overview

MAX6316LUK46BX+ from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low push/pull reset output, 4.63V factory-trimmed reset threshold, 140ms minimum reset timeout, and 1.6s typical watchdog timeout. It monitors VCC supply integrity and provides manual reset and watchdog functionality for embedded microcontroller systems requiring reliable power-on/brownout reset assertion.

For engineers reviewing the MAX6316LUK46BX+ datasheet, MAX6316LUK46BX+ pinout, MAX6316LUK46BX+ application, or MAX6316LUK46BX+ equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in portable and industrial control systems, and two validated alternative parts with documented functional differences.

Technical Context

The MAX6316LUK46BX+ integrates a precision voltage comparator with ±1.5% threshold accuracy at +25°C (±2.5% over –40°C to +125°C), a 140ms reset timeout timer, and a 1.6s watchdog timer cleared by WDI edge transitions. Its push/pull reset output guarantees valid logic levels down to VCC = 1V and sinks/supplies current without external components.

It features a dedicated manual reset input (MR) with internal 52kΩ pullup and 100ns glitch rejection, and a watchdog input (WDI) that accepts 50ns minimum pulses and draws ≤160µA average current when actively serviced. The device operates across 1.0V–5.5V supply range and is AEC-Q100 qualified.

Key Specifications

Pinout & Package

MAX6316LUK46BX+ is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057), measuring 2.9mm × 1.6mm × 1.1mm, suitable for high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6316LUK46BX+, MAX6316MUK46BX+ adds bidirectional timing compatibility but removes push/pull drive strength, while MAX6320PUK46BX+ sacrifices MR and active drive for open-drain flexibility across voltage domains-neither is pin-compatible, and each serves distinct system-level interface requirements.

Availability

MAX6316LUK46BX+ is available at Aetrix Electronics and suitable for portable computers, embedded control systems, and intelligent instruments requiring stable component supply with automotive-grade reliability and lead-free compliance.

Supply support for MAX6316LUK46BX+ 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 computing applications.

The MAX6316–MAX6322 family targets microprocessor supervision in space-constrained, high-reliability systems-delivering factory-trimmed thresholds, integrated watchdogs, and AEC-Q100 qualification for automotive and industrial control.

FAQ

What is the exact reset threshold voltage of MAX6316LUK46BX+ and how tightly is it specified?

The MAX6316LUK46BX+ has a factory-trimmed nominal reset threshold of 4.63V, with tolerance of ±1.5% at +25°C and ±2.5% over the full operating temperature range (–40°C to +125°C). This value is confirmed in Table 1 of the official datasheet and corresponds to the "46" suffix in the part number. The MAX6316LUK46BX+ uses laser-trimmed resistors to achieve this precision without external calibration.

Does MAX6316LUK46BX+ include a manual reset input, and what are its electrical characteristics?

Yes, MAX6316LUK46BX+ includes an active-low manual reset input (MR) with internal 52kΩ pullup to VCC. It features 100ns glitch rejection, accepts TTL/CMOS logic levels depending on VCC, and requires a minimum 1.5µs pulse width at full temperature range. The MR pin is designed to reject fast transients and can be driven directly by a momentary switch to ground without debouncing circuitry.

What watchdog timeout period does MAX6316LUK46BX+ provide, and how is it triggered?

MAX6316LUK46BX+ provides a typical watchdog timeout period of 1.6s, corresponding to the "Y" suffix in its ordering code. It is triggered when the watchdog input (WDI) remains static-either high or low-for longer than 1.6s. The internal timer clears on any WDI edge transition (rising or falling) and also resets automatically during active reset assertion.

Is MAX6316LUK46BX+ compatible with 3.3V and 5V microcontrollers, and what is its VCC operating range?

Yes, MAX6316LUK46BX+ operates across a VCC range of 1.0V to 5.5V and interfaces seamlessly with both 3.3V and 5V microcontrollers. Its push/pull reset output guarantees VOL ≤ 0.3V at ISINK = 1.2mA (for VCC ≥ 2.7V) and VOH ≥ 0.8×VCC at ISOURCE = 500µA, ensuring clean logic-level compatibility without level shifters.

What package type and RoHS status does MAX6316LUK46BX+ use?

MAX6316LUK46BX+ is supplied in a 5-pin SOT23 package (outline 21-0057, land pattern 90-0174) with RoHS-compliant lead-free finish-the "+" suffix in the part number explicitly denotes lead-free packaging per Maxim's ordering convention. Thermal resistance is 255.9°C/W (θJA, multilayer board), supporting operation up to +125°C ambient.