Analog Devices Inc./Maxim Integrated MAX701CSA+T

Overview

MAX701CSA+T from Maxim Integrated is a precision power-supply supervisory circuit for +5V microprocessor systems, featuring dual active-low and active-high reset outputs, factory-trimmed 4.65V reset threshold, guaranteed valid reset down to VCC = 1V, and 200ms minimum reset pulse width. It monitors supply voltage during power-up, power-down, and brownout conditions in embedded controllers and intelligent instruments.

For engineers reviewing the MAX701CSA+T datasheet, MAX701CSA+T pinout, MAX701CSA+T application, or MAX701CSA+T equivalent, key selection criteria include dual-reset output polarity, manual reset debouncing, no external component requirement for +5V operation, and narrow-SO8 packaging compatible with high-density PCB layouts.

Technical Context

The MAX701CSA+T implements a comparator-based reset generator with internal reference and hysteresis, ensuring deterministic reset assertion when VCC drops below 4.65V (±150mV) and sustained deassertion for ≥200ms after VCC rises above threshold. Its dual RESET/RESET outputs provide simultaneous active-low and active-high signals for diverse logic families.

It integrates a debounced manual-reset input (MR) with 5µA internal pullup and supports system-level reset coordination without external RC timing components. The device operates across 0°C to +70°C and tolerates VCC transients up to 100V/µs while maintaining functional reset integrity down to 1V supply.

Key Specifications

Pinout & Package

MAX701CSA+T is housed in an 8-pin narrow-SO (SOIC-8) package with 1.27mm pitch, 3.9mm body width, and RoHS-compliant lead-free finish (+ suffix). Pin 1 is marked with a beveled corner or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G01DBVR and ADM6710ARTZ-REEL7, the MAX701CSA+T delivers unique dual-polarity reset signaling and integrated manual reset debouncing-critical for systems requiring simultaneous compatibility with legacy and modern logic families without added discretes or timing uncertainty.

Availability

MAX701CSA+T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, and automated test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant narrow-SO8 packaging.

Supply support for MAX701CSA+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 low-power operation.

The MAX700/MAX701/MAX702 family was engineered specifically for cost-sensitive, high-volume microprocessor supervisory functions in commercial-grade embedded systems-delivering guaranteed reset timing and dual-output flexibility without external passive components.

FAQ

What is the reset threshold voltage of the MAX701CSA+T and how tightly is it specified?

The MAX701CSA+T has a factory-trimmed reset threshold of 4.65V with a tolerance of ±150mV over the full 0°C to +70°C operating range. This specification ensures accurate +5V supply monitoring without external calibration. The threshold applies to both power-up and power-down conditions, and the device guarantees valid reset output down to VCC = 1.0V. This tight tolerance eliminates the need for post-manufacture trimming in most commercial applications.

Does the MAX701CSA+T require external components to operate on a +5V supply?

No, the MAX701CSA+T requires no external components when used with a +5V supply. Its internal reference, comparator, and output drivers are fully self-contained. The device uses an internal 5µA pullup on the MR pin, and its 4.65V threshold is factory-trimmed. This eliminates external resistors, capacitors, or diodes typically needed in discrete supervisor circuits-reducing BOM cost and PCB area while improving reliability.

What is the function of the RESET and RESET pins on the MAX701CSA+T?

The MAX701CSA+T provides two complementary reset outputs: RESET is an open-drain active-low signal requiring an external pullup resistor, while RESET is a push-pull active-high output. This dual-output architecture allows direct interfacing with both TTL/CMOS logic families and FPGA configuration inputs without external inverters. Both outputs assert simultaneously during power failure and maintain state for ≥200ms after VCC recovers to ensure robust microprocessor initialization.

Can the MAX701CSA+T be used with supply voltages other than +5V?

The MAX701CSA+T is optimized for +5V systems and guarantees operation from VCC = 1.0V to 5.5V. While it will function at higher voltages up to 15.5V absolute maximum, its 4.65V reset threshold remains fixed and calibrated for +5V rails. For non-5V supplies (e.g., 3.3V or 12V), the MAX700 variant-with adjustable SENSE input and external resistor divider-is recommended instead of the MAX701CSA+T.

What does the "+T" suffix indicate in MAX701CSA+T?

The "+T" suffix in MAX701CSA+T denotes tape-and-reel packaging for automated SMT assembly, with RoHS-compliant lead-free terminations. The "+" alone indicates lead-free; the "T" confirms tape-and-reel format (typically 2500 units per reel). This distinguishes it from the tube-packaged MAX701CSA+, which is intended for manual or low-volume placement. Both share identical electrical specifications and narrow-SO8 footprint.