Analog Devices Inc./Maxim Integrated DS1707EUA

Overview

DS1707EUA from Maxim Integrated is a 5V ±5% microprocessor supervisory circuit that monitors VCC, senses external voltage via IN pin, and debounces pushbutton reset input (PBRST). It delivers active-low and active-high reset outputs (RST and RST), generates non-maskable interrupt (NMI) on early power failure detection, and operates across -40°C to +85°C in an 8-pin µSOP package.

For engineers reviewing the DS1707EUA datasheet, DS1707EUA pinout, DS1707EUA application, or DS1707EUA equivalent, key selection considerations include its dual-reset output polarity, 130 ms minimum reset pulse width, 1.25 V IN trip point with hysteresis, NMI timing behavior (200 ns min pulse, 5 µs noise immunity), and compatibility with 5V systems requiring precise brownout detection and manual override capability.

Technical Context

The DS1707EUA integrates three independent monitoring functions: VCC threshold detection (4.50–4.75 V trip), high-impedance IN pin sensing (1.20–1.30 V reference), and PBRST debounced input with 130 ms guaranteed reset assertion. Its internal bandgap reference enables temperature-compensated accuracy without external components.

It provides simultaneous /RST (active-low) and RST (active-high) outputs with 130–285 ms active duration, NMI output pulsed for ≥200 ns upon IN voltage decay below 1.25 V, and built-in 100 µV hysteresis on the IN comparator to reject noise transients under 5 µs. All logic thresholds are referenced to VCC and operate down to 1.2 V supply.

Key Specifications

Pinout & Package

DS1707EUA is housed in an 8-pin µSOP (118-mil) package with exposed pad (not electrically connected), measuring 3.0 mm × 3.0 mm × 1.0 mm. Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise orientation when viewed top-down with marking dot at top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX707ESA and TPS3808G33DBVR, DS1707EUA uniquely combines dual-reset polarity, user-defined voltage monitoring via IN, and noise-immune NMI generation-enabling predictive power-fail response and multi-supply coordination not possible with either alternative.

Availability

DS1707EUA is available at Aetrix Electronics and suitable for industrial automation controllers, medical diagnostic devices, telecom line cards, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance over temperature.

Supply support for DS1707EUA 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 analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The DS1707EUA belongs to Maxim's MicroMonitor™ family of supervisory circuits, designed specifically for robust, multi-function power monitoring in mission-critical embedded systems where deterministic reset behavior and early fault detection are essential.

FAQ

What is the exact VCC trip voltage range specified for DS1707EUA?

The DS1707EUA has a guaranteed VCC trip point of 4.50 V (minimum), 4.65 V (typical), and 4.75 V (maximum) across -40°C to +85°C. This ±5% tolerance around 4.65 V ensures consistent reset assertion before 5V system instability begins, and is validated per Maxim's DS1707/DS1708 datasheet Rev. 0, page 7. The DS1707EUA uses an internal temperature-compensated bandgap reference to maintain this accuracy without external calibration.

Does DS1707EUA support monitoring of voltages other than VCC?

Yes, DS1707EUA supports external voltage monitoring via its IN pin, which compares the applied voltage against a precise 1.25 V internal reference. By using an external resistor divider, users can configure DS1707EUA to monitor supplies such as 12 V, 24 V, or battery rails. The IN pin features ≤1 µA leakage and built-in 100 µV hysteresis, enabling reliable detection without added components-functionality confirmed in the DS1707/DS1708 datasheet Figure 5 and AC Electrical Characteristics table.

How does the DS1707EUA generate its non-maskable interrupt (NMI)?

The DS1707EUA generates NMI by comparing the voltage at the IN pin to its 1.25 V internal reference. When IN falls below 1.25 V, the comparator triggers a ≥200 ns active-low NMI pulse with 100 µV hysteresis and 5 µs minimum noise immunity. This early-warning signal is independent of VCC monitoring and allows systems to initiate controlled shutdown before reset activation. The DS1707EUA's NMI timing and noise rejection are fully characterized in the datasheet's AC Electrical Characteristics table (page 8) and Figure 6.

Is DS1707EUA pin-compatible with MAX707/MAX708 devices?

Yes, DS1707EUA is explicitly pin-compatible with MAX707 and MAX708 in the 8-pin µSOP (118-mil) package, as stated in the "Pin compatible with the MAXIM MAX707/MAX708" feature list and confirmed in the Ordering Information table (page 10). Both share identical pin assignments-including dual RST outputs, PBRST, IN, NMI, VCC, GND, and NC-and require no PCB layout changes when substituting in existing designs.

What is the guaranteed minimum reset pulse width for DS1707EUA?

The DS1707EUA guarantees a minimum reset pulse width of 130 ms for both RST and /RST outputs, whether triggered by VCC dropout, power-up, or PBRST assertion. This value is specified in the AC Electrical Characteristics table (page 8) and applies across the full operating temperature range (-40°C to +85°C) and supply range (1.2 V to 5.5 V). The DS1707EUA's internal timer ensures this duration regardless of supply slew rate or noise, supporting reliable processor initialization.