Analog Devices Inc./Maxim Integrated MAX6310EUK46D3+T

Overview

The MAX6310EUK46D3+T from Maxim Integrated is a precision 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set 4.6V 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, guaranteed operation down to VCC = 1V, and 8µA supply current-ideal for multivoltage embedded systems requiring reliable power-up/brownout reset in portable or industrial controllers.

For engineers reviewing the MAX6310EUK46D3+T datasheet, MAX6310EUK46D3+T pinout, MAX6310EUK46D3+T application, or MAX6310EUK46D3+T equivalent, this device delivers factory-trimmed 4.6V VCC monitoring with ±2.5% accuracy over –40°C to +85°C, dual external reset inputs for flexible rail supervision, and transient-immune reset assertion without external components.

Technical Context

The MAX6310EUK46D3+T implements a triple-input supervision architecture: internal factory-trimmed voltage divider sets the primary 4.6V VCC reset threshold; RST IN compares external voltages against a 1.23V reference via resistor divider; OVRST IN provides overvoltage detection using the same reference. All three inputs feed into a shared reset generator with a fixed 140ms minimum timeout period.

Its push/pull RESET output drives low with 0.3V max VOL at 1.2mA sink current and remains valid down to VCC = 1V. The device ignores fast transients on all monitored inputs-verified up to 100µs duration for 50mV VCC overdrive-and includes a manual-reset input (MR) with 63.5kΩ internal pullup and 1.5µs minimum pulse width guarantee.

Key Specifications

Pinout & Package

Package: 5-pin SOT23 (U5+1), RoHS-compliant lead-free, footprint compatible with standard 5-lead SOT-23 land pattern (Maxim land pattern no. 90-0174).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable reset IC applications.

Compared with MAX6310EUK46D2+T and TPS3808G33DBVR, the MAX6310EUK46D3+T uniquely combines factory-set 4.6V VCC supervision, dual adjustable inputs (RST IN/OVRST IN), and 140ms timeout in a single 5-pin SOT23 - enabling compact, multirail fault detection without design compromises.

Availability

MAX6310EUK46D3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical portable monitors, automotive body control modules, smart energy meters, and multivoltage embedded systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6310EUK46D3+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The MAX6305–MAX6313 product line was designed specifically for multivoltage microprocessor supervision in space-constrained, battery-sensitive, and thermally demanding applications-delivering precision reset generation with minimal external components.

FAQ

What is the exact factory-set VCC reset threshold for MAX6310EUK46D3+T?

The MAX6310EUK46D3+T has a factory-trimmed VCC reset threshold of 4.6V nominal, with guaranteed tolerance of ±2.5% over the full –40°C to +85°C operating temperature range. This value is confirmed in Table 1 of the datasheet and corresponds to the "46" in the part number per Maxim's ordering convention.

Does MAX6310EUK46D3+T support overvoltage monitoring, and how is it implemented?

Yes, the MAX6310EUK46D3+T supports overvoltage monitoring via its dedicated OVRST IN pin (Pin 4). This input compares an externally divided voltage to an internal 1.23V reference; when the divided voltage exceeds 1.23V, the device asserts RESET. The MAX6310EUK46D3+T is one of only three variants in the MAX6305–MAX6313 family (along with MAX6307/MAX6313) that include this OVRST IN capability.

What is the function of the MR pin on MAX6310EUK46D3+T, and does it require external pull-up?

The MR (Manual Reset) pin on MAX6310EUK46D3+T is an active-low input that forces RESET assertion when pulled low. It features an internal 63.5kΩ pullup resistor, so no external pull-up is required. A momentary switch from MR to GND suffices for manual reset; the device guarantees reset assertion for ≥1.5µs after MR goes high, followed by the full 140ms timeout period.

Can MAX6310EUK46D3+T monitor a 3.3V rail while supervising a 5V VCC supply?

Yes, the MAX6310EUK46D3+T can monitor a 3.3V rail using its RST IN pin (Pin 3). By connecting a resistor divider between the 3.3V rail and GND, with the midpoint fed to RST IN, the device triggers RESET when the 3.3V rail drops below the threshold set by the divider ratio relative to the internal 1.23V reference - independent of the 4.6V VCC supervision.

Is MAX6310EUK46D3+T pin-compatible with other devices in the MAX6305–MAX6313 family?

The MAX6310EUK46D3+T uses the standard 5-pin SOT23 package and shares identical pinout with MAX6306/MAX6307/MAX6309/MAX6312/MAX6313 - Pin 1 = RESET, Pin 2 = GND, Pin 3 = RST IN, Pin 4 = OVRST IN, Pin 5 = VCC. However, functional differences exist: only MAX6307/MAX6310/MAX6313 include both RST IN and OVRST IN, so substitution requires verifying input configuration requirements.