Analog Devices Inc./Maxim Integrated MAX6316LUK29BX/V+T

Overview

MAX6316LUK29BX/V+T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low push/pull reset output, 2.93V factory-trimmed reset threshold, 140ms minimum reset timeout, and 1.6s typical watchdog timeout. It monitors VCC supply voltage, provides manual reset input (MR), and asserts reset during power-up, brownout, or software hang conditions in embedded control systems.

For engineers reviewing the MAX6316LUK29BX/V+T datasheet, MAX6316LUK29BX/V+T pinout, MAX6316LUK29BX/V+T application, or MAX6316LUK29BX/V+T equivalent, key selection criteria include guaranteed reset validity down to VCC = 1V, immunity to short negative VCC transients (<4µs at 100mV under threshold), AEC-Q100 qualification for automotive use, and compatibility with 3V/5V digital systems requiring robust power-on reset sequencing.

Technical Context

The MAX6316LUK29BX/V+T integrates a precision voltage detector with ±1.5% threshold accuracy at +25°C and ±2.5% over –40°C to +125°C, a 140ms reset timeout generator, and a 1.6s watchdog timer cleared by WDI edge transitions. Its push/pull reset output sources/sinks current without external components and remains valid down to VCC = 1V.

It features a dedicated manual reset input (MR) with internal 52kΩ pullup, 100ns glitch rejection, and MR-to-reset propagation delay of 230ns at VCC = 5V. The watchdog input (WDI) accepts 50ns minimum pulse width and draws ≤160µA average current when actively toggled.

Key Specifications

Pinout & Package

MAX6316LUK29BX/V+T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal resistance θJA = 255.9°C/W on multilayer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809E29DBVR and ADM6316-29ARTZ-R7, MAX6316LUK29BX/V+T uniquely integrates watchdog supervision, manual reset, and push/pull drive in a single AEC-Q100-qualified 5-pin SOT23, eliminating secondary components and supporting automotive-grade reliability without layout changes.

Availability

MAX6316LUK29BX/V+T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, portable medical devices, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6316LUK29BX/V+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 high-performance analog and mixed-signal semiconductor solutions for automotive, industrial, and communications markets.

The MAX6316–MAX6322 family delivers integrated power-supply monitoring, reset generation, watchdog supervision, and manual reset in miniature packages for space-constrained embedded systems requiring AEC-Q100 compliance.

FAQ

What is the exact reset threshold voltage of MAX6316LUK29BX/V+T and how tightly is it specified?

The MAX6316LUK29BX/V+T has a factory-trimmed nominal reset threshold of 2.93V, with tolerance of ±1.5% at +25°C and ±2.5% over the full operating temperature range (–40°C to +125°C). This precision is achieved via laser trimming of internal resistive dividers and is documented in Table 1 of the Maxim datasheet Rev 14. The threshold is referenced to VCC and remains stable across load and process variation.

Does MAX6316LUK29BX/V+T support watchdog functionality, and what is its timeout period?

Yes, MAX6316LUK29BX/V+T includes a watchdog timer with a typical timeout period of 1.6s, corresponding to the "Y" suffix in its ordering code. The watchdog is cleared by any rising or falling edge on the WDI pin and asserts reset if unattended for the full timeout duration. It remains disabled if WDI is left unconnected or three-stated, as confirmed in the Selector Guide and Electrical Characteristics section.

What type of reset output does MAX6316LUK29BX/V+T provide, and can it drive an MCU reset pin directly?

MAX6316LUK29BX/V+T provides an active-low push/pull reset output (RESET pin 1), capable of sinking ≥1.2mA at VCC ≥ 2.7V and sourcing ≥500µA at VCC ≥ 2.7V. This allows direct connection to standard CMOS MCU reset inputs without external pullup resistors, as verified in the Pin Description and Electrical Characteristics tables.

Is MAX6316LUK29BX/V+T qualified for automotive applications, and what grade does it meet?

Yes, MAX6316LUK29BX/V+T carries the "/V" suffix indicating AEC-Q100 qualification. It meets Grade 2 requirements (–40°C to +105°C case temperature), including stress testing per JESD22-A108, and is intended for automotive body electronics, infotainment, and ADAS subsystems where extended temperature operation and long-term reliability are mandatory.

How does the manual reset (MR) input behave, and what is its timing relationship to the reset output?

The MR input on MAX6316LUK29BX/V+T is active-low with internal 52kΩ pullup. When pulled low, it forces reset assertion; after release, reset remains active for the full 140ms timeout period. Propagation delay from MR low-to-high transition to RESET deassertion is 230ns at VCC = 5V, as specified in the Electrical Characteristics table under "MR to Reset Delay".