Analog Devices Inc./Maxim Integrated MAX6316LUK29CY-T

Overview

MAX6316LUK29CY-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 integrity and provides manual reset and watchdog functionality for embedded microcontroller systems requiring reliable power-on/brownout reset assertion.

For engineers reviewing the MAX6316LUK29CY-T datasheet, MAX6316LUK29CY-T pinout, MAX6316LUK29CY-T application, or MAX6316LUK29CY-T equivalent, key selection criteria include its guaranteed reset validity down to VCC = 1V, immunity to short negative VCC transients (<4µs at 100mV under threshold), AEC-Q100 qualification, and integrated configuration enabling flexible system-level reset management without external components.

Technical Context

The MAX6316LUK29CY-T implements a precision voltage monitor with laser-trimmed resistive divider setting VRST = 2.93V (±1.5% at +25°C, ±2.5% over -40°C to +125°C), coupled with a digital reset timer generating 140ms minimum active-reset duration after VCC recovery. Its watchdog circuit clears on any WDI edge and times out after 1.6s if unserviced.

This device features an active-low push/pull RESET output capable of sourcing/sinking current (VOL ≤ 0.3V at ISINK = 1.2mA, VOH ≥ 0.8×VCC at ISOURCE = 500µA), MR input with internal 52kΩ pullup and 100ns glitch rejection, and operates across 1.0V–5.5V supply range with supply current as low as 3µA at VCC = 3.6V (MAX6319 variant family behavior confirmed for this part).

Key Specifications

Pinout & Package

MAX6316LUK29CY-T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057) with 0.95mm pitch, footprint-compatible with JEDEC MO-178AB, 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 MAX6316MUK29CY-T, MAX6316LUK29CY-T simplifies PCB layout by eliminating bidirectional timing constraints, while versus TPS3808G18DBVR it adds critical watchdog supervision and matches 3.3V system thresholds-making it superior for safety-critical embedded controllers.

Availability

MAX6316LUK29CY-T is available at Aetrix Electronics and suitable for portable computers, intelligent instruments, and embedded control systems requiring stable component supply, automotive-grade reliability, and precise 2.93V reset thresholding.

Supply support for MAX6316LUK29CY-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 industrial, automotive, communications, and computing markets.

The MAX6316–MAX6322 product line delivers compact, factory-configured supervisory circuits optimized for microprocessor reset integrity, watchdog safety, and manual reset integration in space-constrained embedded systems.

FAQ

What is the exact reset threshold voltage of MAX6316LUK29CY-T and how tightly is it specified?

The MAX6316LUK29CY-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 -40°C to +125°C operating range. This precision is achieved via laser trimming of internal resistive dividers, ensuring consistent brownout detection without external calibration components in the MAX6316LUK29CY-T design.

Does MAX6316LUK29CY-T include a watchdog timer, and what is its timeout period?

Yes, MAX6316LUK29CY-T includes a watchdog timer with a typical timeout period of 1.6 seconds. The timer resets on any rising or falling edge at the WDI pin and asserts RESET if unserviced for the full timeout duration. This feature is factory-programmed and cannot be adjusted externally, providing deterministic fault recovery in the MAX6316LUK29CY-T implementation.

What type of reset output does MAX6316LUK29CY-T provide, and what are its drive capabilities?

MAX6316LUK29CY-T provides an active-low push/pull reset output capable of both sourcing and sinking current. It guarantees VOL ≤ 0.3V at ISINK = 1.2mA (VCC ≥ 2.7V) and VOH ≥ 0.8×VCC at ISOURCE = 500µA (VCC ≥ 2.7V), eliminating the need for external pullup resistors and ensuring robust drive into capacitive or loaded reset lines in the MAX6316LUK29CY-T application.

Can MAX6316LUK29CY-T operate reliably during severe supply voltage dips?

Yes, MAX6316LUK29CY-T guarantees valid reset assertion down to VCC = 1.0V and is immune to short negative transients-specifically, it will not trigger spurious reset for VCC undershoots ≤100mV lasting less than 4µs. This behavior is verified across temperature and ensures dependable operation in electrically noisy environments where the MAX6316LUK29CY-T is deployed.

Is MAX6316LUK29CY-T qualified for automotive applications?

Yes, MAX6316LUK29CY-T is AEC-Q100 qualified, meaning it has undergone stress testing for temperature cycling, humidity, vibration, and electrical robustness required for automotive electronic modules. This qualification covers the full -40°C to +125°C operating range and confirms suitability for under-hood and cabin applications using the MAX6316LUK29CY-T device.