Analog Devices Inc./Maxim Integrated MAX6310UK29D3-T

Overview

The MAX6310UK29D3-T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set 2.9V reset threshold), an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN) to assert a push/pull active-low RESET output. It features 140ms minimum reset timeout, 8µA supply current, and guaranteed RESET validity down to VCC = 1V. It is used in multivoltage embedded systems requiring reliable power-on and brownout reset control.

For engineers reviewing the MAX6310UK29D3-T datasheet, MAX6310UK29D3-T pinout, MAX6310UK29D3-T application, or MAX6310UK29D3-T equivalent, key selection considerations include its dual adjustable reset inputs (RST IN/OVRST IN), factory-trimmed 2.9V VCC threshold with ±2.5% tolerance over -40°C to +85°C, 140ms timeout, SOT23-5 package compatibility, and immunity to fast VCC transients.

Technical Context

The MAX6310UK29D3-T implements a triple-monitor architecture: internal factory-trimmed resistor divider for VCC supervision at 2.9V nominal, external resistor-divider–based comparator for RST IN (undervoltage), and another for OVRST IN (overvoltage). All three inputs feed into a shared reset generator with a fixed 140ms minimum timeout period after all monitored voltages return to regulation.

Its push/pull RESET output guarantees VOL ≤ 0.3V at ISINK = 500µA for VCC > 1.8V and VOH ≥ 0.8 × VCC at ISOURCE = 150µA - enabling direct interface with 3.3V/5V µP reset inputs without external pull-up. The device operates from VCC = (VTH + 2.5%) to +5.5V and remains functional down to VCC = 1.0V, with reset assertion guaranteed across the full -40°C to +85°C industrial temperature range.

Key Specifications

Pinout & Package

MAX6310UK29D3-T is housed in a 5-pin SOT23-5 package (outline U5+1, land pattern 90-0174), optimized for space-constrained PCB layouts and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6310UK29D3-T, the MAX6310EUK29D3-T offers identical functionality with extended temperature support, while the TPS3808G33DBVR reduces feature set and flexibility to achieve lower quiescent current - making it suitable only for simpler, single-rail applications where adjustable monitoring is unnecessary.

Availability

MAX6310UK29D3-T is available at Aetrix Electronics and suitable for industrial PLCs, portable medical devices, automotive body electronics, and networking edge equipment requiring stable component supply across extended production lifecycles.

Supply support for MAX6310UK29D3-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 precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX6305–MAX6313 family delivers highly integrated, factory-programmed supervisory circuits targeting multivoltage embedded systems needing coordinated reset generation with minimal external components.

FAQ

What is the factory-set VCC reset threshold for MAX6310UK29D3-T?

The MAX6310UK29D3-T has a factory-trimmed VCC reset threshold of 2.9V nominal, with ±2.5% tolerance over the full -40°C to +85°C temperature range. This value is permanently programmed during manufacturing and cannot be adjusted. The "29" in the part number explicitly denotes the 2.9V threshold per Maxim's ordering convention.

Does MAX6310UK29D3-T support manual reset functionality?

No, the MAX6310UK29D3-T does not include a manual reset (MR) input. It belongs to the MAX6307/MAX6310/MAX6313 variant group, which features RST IN and OVRST IN but omits MR. In contrast, MAX6306/MAX6309/MAX6312 include MR. For manual reset capability, consider MAX6309UK29D3-T or MAX6312UK29D3-T instead.

What are the voltage requirements for reliable operation of MAX6310UK29D3-T?

MAX6310UK29D3-T requires VCC ≥ (2.9V + 2.5%) ≈ 2.97V to monitor its internal 2.9V threshold, and operates up to 5.5V. It guarantees RESET assertion down to VCC = 1.0V, but valid reset timing and comparator function require VCC ≥ 2.97V. Operation below this minimum may result in undefined reset behavior or failure to detect VCC faults.

How is the 140ms reset timeout period implemented in MAX6310UK29D3-T?

The 140ms minimum reset timeout in MAX6310UK29D3-T is factory-programmed and internally generated - no external capacitor or resistor is needed. It begins timing once all monitored inputs (VCC, RST IN, OVRST IN) exceed their respective thresholds and continues until expiration, after which RESET deasserts. Typical timeout is 200ms, with maximum 280ms over temperature.

Can MAX6310UK29D3-T monitor both overvoltage and undervoltage on the same external rail?

Yes. By connecting the same external rail to both RST IN and OVRST IN through separate resistor dividers, MAX6310UK29D3-T can independently detect undervoltage (via RST IN falling below 1.23V) and overvoltage (via OVRST IN rising above 1.23V). Each input uses the same 1.23V internal reference but opposite polarity logic - enabling bidirectional fault detection on a single monitored supply.