Analog Devices Inc./Maxim Integrated MAX6841EUKD0

Overview

MAX6841EUKD0 from Maxim Integrated is an ultra-low-voltage microprocessor supervisory circuit designed to monitor +0.9V to +1.5V power supplies in portable and battery-powered digital systems. It provides factory-trimmed 0.833V reset threshold, 30ms reset timeout period (D2 suffix), ±2.5% threshold accuracy over temperature, and active-low push-pull RESET output - enabling reliable power-on reset and brownout detection for critical µP applications.

For engineers reviewing the MAX6841EUKD0 datasheet, MAX6841EUKD0 pinout, MAX6841EUKD0 application, or MAX6841EUKD0 equivalent, this device delivers verified low-power supervision (5.7µA typical ICC) with guaranteed reset validity down to VCC = 0.55V, immunity to sub-150ns VCC transients, and SOT23-5 space-constrained packaging suitable for high-density portable designs.

Technical Context

The MAX6841EUKD0 integrates a precision voltage comparator with hysteresis (0.75% of VTH), debounced manual reset input (MR) with internal 20kΩ pullup, and fixed 30ms timeout delay generator. Its reset assertion logic responds exclusively to VCC falling below the factory-set 0.833V threshold or MR activation - not to RESET IN (absent on this variant).

It features dual push-pull reset outputs: active-low RESET and active-high RESET, both functional across VCC = 0.75V to +1.8V. The active-low output sinks ≥10µA at 0.2×VCC when asserted, while the active-high output sources ≥40µA at 0.8×VCC when deasserted - ensuring robust interface with CMOS µP reset inputs.

Key Specifications

Pinout & Package

MAX6841EUKD0 is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and lead-free (RoHS-compliant) finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6841EUKD0, MAX6316HUT48+T lacks manual reset and operates at incompatible voltage ranges, while TPS3808G12DBVR trades factory precision for configurability - making MAX6841EUKD0 optimal for cost-sensitive, space-constrained 0.9V–1.5V applications requiring zero-component supervision.

Availability

MAX6841EUKD0 is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT nodes, industrial handheld terminals, automotive body control modules, and telecom edge equipment requiring stable component supply with guaranteed long-term manufacturability.

Supply support for MAX6841EUKD0 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, communications, and consumer applications.

The MAX6841–MAX6845 family was engineered specifically for ultra-low-voltage microprocessor supervision in space- and power-constrained portable electronics, addressing the need for sub-1V reset accuracy without external components.

FAQ

What is the exact reset threshold voltage of MAX6841EUKD0?

The MAX6841EUKD0 has a factory-trimmed reset threshold of 0.833V (±2.5% over temperature), corresponding to the 'E' suffix in its part number. This value is laser-trimmed during production and does not require external resistor networks. The threshold is referenced to VCC and remains stable across the full -40°C to +85°C operating range, ensuring consistent brownout detection for 0.9V–1.5V core supplies.

Does MAX6841EUKD0 support manual reset functionality?

Yes, MAX6841EUKD0 includes a dedicated active-low manual reset input (MR) on pin 4, featuring an internal 20kΩ pullup resistor to VCC. Pulling MR low forces immediate reset assertion regardless of VCC level, and reset remains active for the full 30ms timeout period after MR returns high. This enables field-service recovery and test-mode initialization without modifying power sequencing.

What are the electrical characteristics of the RESET outputs on MAX6841EUKD0?

MAX6841EUKD0 provides two complementary push-pull reset outputs: pin 1 (active-low RESET) and pin 3 (active-high RESET). When asserted, the active-low output sinks ≥10µA at 0.2×VCC; when deasserted, the active-high output sources ≥40µA at 0.8×VCC. Both outputs operate reliably down to VCC = 0.75V, eliminating need for external pull resistors in standard µP interface configurations.

Can MAX6841EUKD0 operate with VCC below 0.9V?

Yes, MAX6841EUKD0 functions with VCC as low as 0.75V for normal operation and guarantees valid reset output down to VCC = 0.55V. Below 0.55V, the push-pull outputs enter high-impedance state - but this aligns with typical µP operational limits, as most 0.9V-core processors cease functioning below 0.6V. The device's 5.7µA supply current at 0.9V further enables extended battery runtime during low-VCC monitoring.

Is MAX6841EUKD0 pin-compatible with other devices in the MAX6841–MAX6845 family?

MAX6841EUKD0 shares identical SOT23-5 pinout and footprint with all MAX6841–MAX6845 variants, including MAX6842, MAX6843, MAX6844, and MAX6845. However, functional differences exist: MAX6841EUKD0 lacks RESET IN (pin 3 is RESET, not RESET IN), and offers dual push-pull outputs - unlike MAX6842 (open-drain) or MAX6845 (open-drain only). PCB layout is reusable, but schematic connections must match the specific variant's function.