Analog Devices Inc./Maxim Integrated MAX6310UK29D1-T

Overview

MAX6310UK29D1-T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set threshold 2.9V ±2.5%), an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN), asserting active-low push/pull RESET when any monitored supply violates its threshold. It features 1ms minimum reset timeout, 8µA supply current, and guaranteed RESET validity down to VCC = 1V. Used in multivoltage embedded systems for reliable power-up/brownout reset control.

For engineers reviewing the MAX6310UK29D1-T datasheet, MAX6310UK29D1-T pinout, MAX6310UK29D1-T application, or MAX6310UK29D1-T equivalent, key selection criteria include factory-trimmed 2.9V VCC threshold tolerance (±2.5% over -40°C to +85°C), dual adjustable comparator inputs (RST IN/OVRST IN), push/pull RESET output drive capability, immunity to sub-1µs VCC transients, and compatibility with 3.3V/5V system rails.

Technical Context

The MAX6310UK29D1-T implements a triple-monitor architecture: internal factory-trimmed resistor divider sets nominal 2.9V VCC reset threshold; external resistor dividers program RST IN (undervoltage) and OVRST IN (overvoltage) thresholds referenced to 1.23V internal bandgap. All three comparators feed a shared reset generator with 1ms minimum timeout.

Its push/pull RESET output sources ≥0.8×VCC at 500µA and sinks ≤0.3V at 1.2mA, enabling direct interface with µP reset pins without external pull-ups. The device operates from VCC = (2.9V × 0.975) ≈ 2.83V to 5.5V and maintains functional reset assertion down to VCC = 1V, with guaranteed operation across -40°C to +85°C.

Key Specifications

Pinout & Package

MAX6310UK29D1-T is housed in a 5-pin SOT23 package (package code U5+1, outline 21-0057), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. Pin 1 is RESET (active-low push/pull), Pin 2 is GND, Pin 3 is OVRST IN, Pin 4 is RST IN, and Pin 5 is VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6310UK29D1-T, the MAX6310EUK29D1-T offers identical electrical performance with extended temperature support, while the TPS3808G12DBVR provides lower-cost single-rail supervision but omits the critical triple-monitor architecture and programmable thresholds needed for multivoltage system integrity.

Availability

MAX6310UK29D1-T is available at Aetrix Electronics and suitable for industrial PLCs, medical infusion pumps, automotive body control units, and point-of-sale terminal designs requiring stable component supply, long-term manufacturability, and guaranteed reset reliability across voltage and temperature extremes.

Supply support for MAX6310UK29D1-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, medical, automotive, and communications markets.

The MAX6305–MAX6313 family delivers programmable, multi-input supervisory circuits targeting space-constrained embedded systems needing simultaneous monitoring of multiple voltage rails with factory-trimmed precision and transient immunity.

FAQ

What is the exact factory-set VCC reset threshold for MAX6310UK29D1-T?

The MAX6310UK29D1-T has a factory-trimmed VCC reset threshold of 2.9V with ±2.5% tolerance over the full operating temperature range (-40°C to +85°C). This value is laser-trimmed during production and specified in the Electrical Characteristics table under "Reset Threshold (VTH)" for MAX6310 variants. The "29" in the part number explicitly denotes the 2.9V nominal threshold per Table 1 of the datasheet.

Does MAX6310UK29D1-T support manual reset functionality?

No, the MAX6310UK29D1-T does not include a manual reset (MR) input. Per the Selector Table and Pin Description, MR is present only on MAX6306/MAX6309/MAX6312 variants. The MAX6310UK29D1-T pinout consists solely of RESET, GND, OVRST IN, RST IN, and VCC-no dedicated MR pin exists, and internal MR circuitry is absent.

What are the voltage ranges supported by the RST IN and OVRST IN inputs on MAX6310UK29D1-T?

The RST IN and OVRST IN inputs on MAX6310UK29D1-T compare external voltages to a 1.23V internal reference (VRSTH = 1.23V ±0.03V). For RST IN (undervoltage), the monitored voltage (VIN) must fall below VTH = ((R1+R2)/R2) × 1.23V to assert reset. For OVRST IN (overvoltage), VIN must exceed that same threshold. Input leakage is ±25nA, enabling megohm-level resistor dividers without significant error.

How does the reset timeout period of MAX6310UK29D1-T behave over temperature?

The MAX6310UK29D1-T's reset timeout period (tRP = 1ms minimum for D1 variant) exhibits ±1% variation over -40°C to +85°C, as shown in Figure 6 ("RESET TIMEOUT vs. TEMPERATURE") of the datasheet. This tight stability ensures consistent reset hold time across environmental conditions, critical for reliable µP initialization in industrial and automotive applications.

Can MAX6310UK29D1-T monitor a 5V supply directly using its VCC pin?

Yes, MAX6310UK29D1-T can monitor a 5V supply directly on its VCC pin. Its VCC operating range is (2.9V × 0.975) ≈ 2.83V to 5.5V, and the internal factory-trimmed divider is designed for direct connection to rails up to 5.5V. When monitoring 5V, the 2.9V threshold provides ~42% undervoltage margin, making it suitable for detecting severe brownouts but not minor dips-supplemental monitoring via RST IN is recommended for tighter tolerances.