Analog Devices Inc./Maxim Integrated MAX6310EUK50D4+

Overview

MAX6310EUK50D4+ from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set at 5.0V ±1.5%), an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN) to assert a push/pull active-low RESET output. It guarantees valid reset assertion down to VCC = 1.0V, features 1120ms minimum reset timeout, and draws only 8µA supply current - ideal for multivoltage embedded systems requiring robust brownout protection.

For engineers reviewing the MAX6310EUK50D4+ datasheet, MAX6310EUK50D4+ pinout, MAX6310EUK50D4+ application, or MAX6310EUK50D4+ equivalent, key selection criteria include its −40°C to +85°C industrial temperature range, factory-trimmed 5.0V VCC threshold with 40ppm/°C drift, immunity to sub-1µs VCC transients, and dual external comparator inputs enabling flexible multi-rail monitoring in portable and industrial controllers.

Technical Context

The MAX6310EUK50D4+ implements a triple-input supervision architecture: internal factory-trimmed resistor divider sets the primary 5.0V VCC reset threshold; RST IN compares external voltages against a precise 1.23V reference (±0.03V); OVRST IN provides overvoltage detection using the same reference. All three inputs feed a shared reset generator with a fixed 1120ms timeout period.

Its push/pull RESET output drives low with 0.3V max VOL at 500µA sink current and remains functional across the full VCC range of 1.0V–5.5V. The device ignores fast transients via internal filtering - validated up to 100V/µs dV/dt on VCC and confirmed for RST IN/OVRST IN via typical operating curves showing transient rejection exceeding 10µs at 100mV overdrive.

Key Specifications

Pinout & Package

Package: 5-pin SOT23 (U5-1), lead-free, surface-mount, 2.9mm × 1.6mm footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6310EUK49D4+, the MAX6310EUK50D4+ provides higher reset threshold margin for modern 5V rails; compared with TPS3808G33DBVR, it delivers triple-input flexibility and 5.6× longer timeout at the cost of 5× higher quiescent current - a justified trade-off for multirail industrial designs.

Availability

MAX6310EUK50D4+ is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical devices, automotive body control modules, and network edge routers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6310EUK50D4+ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The MAX6305–MAX6313 family was designed specifically for multivoltage microprocessor supervision in space-constrained, noise-prone environments - delivering precision reset generation with minimal external components and guaranteed operation across harsh thermal conditions.

FAQ

What is the exact factory-programmed VCC reset threshold for MAX6310EUK50D4+?

The MAX6310EUK50D4+ has a factory-trimmed VCC reset threshold of 5.000V ±1.5% at +25°C, with guaranteed stability over −40°C to +85°C and a temperature coefficient of 40ppm/°C. This value is encoded in the "50" suffix per Maxim's ordering convention and confirmed in Table 1 of the datasheet. The MAX6310EUK50D4+ does not require external adjustment to achieve this specification.

Does MAX6310EUK50D4+ support monitoring of both undervoltage and overvoltage conditions on external rails?

Yes, the MAX6310EUK50D4+ includes dedicated RST IN and OVRST IN pins that compare external voltages to an internal 1.23V reference. RST IN asserts reset when the external voltage falls below the programmed threshold; OVRST IN asserts reset when it exceeds the threshold. Both inputs accept standard resistor-divider configurations, enabling independent undervoltage and overvoltage supervision of secondary rails alongside the primary 5.0V VCC monitoring in the MAX6310EUK50D4+.

What is the minimum VCC voltage at which MAX6310EUK50D4+ guarantees valid RESET output?

The MAX6310EUK50D4+ guarantees RESET output validity down to VCC = 1.0V, with VOL ≤ 0.3V at 500µA sink current. This is explicitly specified in the Electrical Characteristics table and ensures reliable reset assertion during deep brownout conditions before system power collapse. Below 1.0V, output behavior is not guaranteed - a critical design boundary for battery-powered systems using the MAX6310EUK50D4+.

Can MAX6310EUK50D4+ replace a basic single-threshold reset IC in existing designs?

Yes, the MAX6310EUK50D4+ can directly replace basic reset ICs in 5V systems due to its pin-compatible SOT23-5 package, identical footprint, and push/pull active-low RESET output. Its factory-set 5.0V threshold matches common industry standards, and the absence of required external components simplifies drop-in integration. However, unused RST IN and OVRST IN pins must be properly terminated (RST IN to VCC, OVRST IN to GND) to maintain default behavior in the MAX6310EUK50D4+.

What is the reset timeout period programmed into MAX6310EUK50D4+?

MAX6310EUK50D4+ features a factory-programmed reset timeout period of 1120ms minimum, indicated by the "D4" suffix in the part number. This value is guaranteed over the full −40°C to +85°C operating temperature range and is temperature-stable to within ±1% (per Typical Operating Characteristics curve TOC05). The timeout begins when all monitored supplies exceed their thresholds and ensures sufficient hold time for complex processor initialization sequences in the MAX6310EUK50D4+.