Analog Devices Inc./Maxim Integrated MAX701ESA+T

Overview

MAX701ESA+T from Maxim Integrated is a precision power-supply supervisory circuit for +5V microprocessor systems, providing dual active-low and active-high reset outputs (RESET/RESET), guaranteed valid reset state down to VCC = 1V, 4.65V factory-trimmed threshold, ≥200ms reset pulse width, and debounced manual-reset input. It ensures reliable system initialization in industrial controllers and embedded instrumentation.

For engineers reviewing the MAX701ESA+T datasheet, MAX701ESA+T pinout, MAX701ESA+T application, or MAX701ESA+T equivalent, key selection factors include its dual-output reset architecture, -40°C to +85°C extended temperature operation, narrow-SO-8 package, and compatibility with low-voltage brownout detection in µP-based systems requiring deterministic power-on sequencing.

Technical Context

The MAX701ESA+T implements a precision bandgap-based voltage comparator with internal 4.65V reference, generating synchronized RESET and RESET signals during power-up, power-down, and brownout events. Its reset pulse width is internally timed to ≥200ms, independent of external components.

It features a debounced MR input with 5µA internal pullup and logic-level compatibility: MR low activates both outputs, while VCC monitoring remains active when CTL = GND - a configuration fixed for the MAX701 (unlike the configurable MAX700). No SENSE or HYST pins are functional in this variant.

Key Specifications

Pinout & Package

MAX701ESA+T is supplied in an 8-pin narrow-SO (SOIC-8) package, 3.9mm body width, 1.27mm pitch, RoHS-compliant lead-free construction (indicated by '+' suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX701ESA+T, TPS3808G15DBVR offers superior threshold accuracy but lacks the complementary output pair critical for legacy logic families, while ADM6713ARZ-46 simplifies design at the expense of configurability - making MAX701ESA+T optimal for systems needing robust, dual-polarity reset signaling with manual override capability.

Availability

MAX701ESA+T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, and telecom line cards requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX701ESA+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 and mixed-signal ICs for industrial, communications, and computing applications, emphasizing reliability, integration, and performance in harsh environments.

The MAX700/MAX701/MAX702 family was engineered specifically for dependable power-supply monitoring in µP-based systems, delivering factory-trimmed thresholds, guaranteed reset timing, and minimal external component count in commercial and extended temperature grades.

FAQ

What is the reset threshold voltage for MAX701ESA+T?

The MAX701ESA+T has a factory-trimmed reset threshold of 4.65V, with a guaranteed range of 4.50V to 4.75V over the full -40°C to +85°C operating temperature range. This value applies to both power-up and power-down conditions and is optimized for standard +5V digital systems without requiring external resistor networks.

Does MAX701ESA+T support manual reset functionality?

Yes, MAX701ESA+T includes a debounced manual-reset input (MR pin) with a 5µA internal pullup. Pulling MR low below 0.7V asserts both RESET and RESET outputs synchronously. The internal debounce eliminates switch bounce, enabling direct connection to a momentary pushbutton without external RC filtering.

Can MAX701ESA+T operate with supply voltages below 5V?

Yes, MAX701ESA+T functions reliably down to VCC = 1V, and its RESET/RESET outputs remain in a valid logic state throughout that range. However, the 4.65V reset threshold is calibrated for +5V systems; operation at lower nominal supplies (e.g., 3.3V) requires verification of reset margin and may necessitate alternative supervision solutions.

What is the meaning of the '+' suffix in MAX701ESA+T?

The '+' suffix in MAX701ESA+T indicates RoHS-compliant, lead-free packaging per Maxim Integrated's ordering convention. It specifies that the narrow-SO-8 device uses lead-free terminations and meets JEDEC J-STD-609A Class 3 marking requirements - distinct from leaded versions denoted without the '+' symbol.

How does the reset pulse width behave during power-down versus power-up?

The MAX701ESA+T guarantees a minimum 200ms reset pulse width during both power-up and power-down transitions. Electrical characteristics confirm identical timing behavior: 200–500ms pulse width is internally generated and independent of VCC slew rate, ensuring consistent µP reset hold time regardless of whether supply voltage is rising or falling.