Analog Devices Inc./Maxim Integrated DS1707ESA+T&R

Overview

DS1707ESA+T&R from Maxim Integrated is a 5V ±5% supply voltage supervisor IC with dual active-high/active-low reset outputs, non-maskable interrupt (NMI), and pushbutton reset debouncing. It monitors VCC, senses external voltage via high-impedance IN pin, and guarantees ≥130 ms reset pulse width. Used in industrial microprocessor systems requiring reliable power-up/power-down sequencing and early power-fail warning.

For engineers reviewing the DS1707ESA+T&R datasheet, DS1707ESA+T&R pinout, DS1707ESA+T&R application, or DS1707ESA+T&R equivalent, key selection criteria include VCC trip point (4.50–4.75 V), NMI timing (≥200 µs pulse, 5 µs detection delay), RST/RST assertion duration (130–285 ms), and SOIC-8 industrial temperature support (−40°C to +85°C).

Technical Context

The DS1707ESA+T&R implements a precision bandgap-referenced comparator for VCC monitoring and a separate high-impedance voltage sense input (IN) referenced to 1.25 V internal threshold. Its dual-reset architecture provides simultaneous /RST (active-low) and RST (active-high) outputs with guaranteed minimum 130 ms assertion during power-up and power-down events.

It integrates pushbutton reset debouncing with 150 ns input delay and generates a non-maskable interrupt (NMI) on IN voltage decay below 1.25 V, featuring 100 µV hysteresis and 5 µs noise immunity. The device operates across 1.2 V to 5.5 V supply range and draws only 50–60 µA quiescent current.

Key Specifications

Pinout & Package

DS1707ESA+T&R is housed in an 8-pin SOIC (150-mil) package with gull-wing leads, JEDEC MS-012AC compliant, 1.27 mm pitch, and 5.0 mm × 4.0 mm body size.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with MAX707ESA+, DS1707ESA+T&R adds external voltage sensing via IN pin for multi-rail monitoring; compared with TPS3808G33DBVR, it provides NMI-driven pre-fail response and hardware reset button support-making it suitable for systems requiring layered power fault handling.

Availability

DS1707ESA+T&R is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, telecom infrastructure, and energy metering applications requiring stable component supply and long-term lifecycle support.

Supply support for DS1707ESA+T&R 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, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.

The DS1707ESA+T&R belongs to the MicroMonitor™ family of voltage supervisors engineered for robust power-fail detection, reset generation, and early-warning interrupt signaling in mission-critical embedded systems.

FAQ

What is the VCC trip point tolerance for DS1707ESA+T&R?

The DS1707ESA+T&R has a specified VCC trip point of 4.50 V (min), 4.65 V (typ), and 4.75 V (max), corresponding to ±5% tolerance around 4.65 V nominal. This ensures reliable reset assertion before a 5V system enters unstable operating region. DS1707ESA+T&R maintains this specification across its full industrial temperature range (−40°C to +85°C) and supply voltage range (1.2 V to 5.5 V).

Does DS1707ESA+T&R support external voltage monitoring beyond VCC?

Yes, DS1707ESA+T&R supports external voltage monitoring via its dedicated IN pin, which compares an externally divided voltage against an internal 1.25 V reference. This allows supervision of higher-voltage rails (e.g., 12 V, 24 V) or secondary supplies independent of VCC. DS1707ESA+T&R uses this capability to generate the NMI signal, providing early warning before VCC dropout occurs.

How does the pushbutton reset function work on DS1707ESA+T&R?

The DS1707ESA+T&R debounces the PBRST input internally and guarantees a minimum 130 ms active reset pulse on both RST and /RST outputs. The timing starts upon release of the pushbutton (transition from low to high). DS1707ESA+T&R includes a 40 kΩ internal pull-up on PBRST, eliminating need for external components. This ensures clean, bounce-free reset initiation in human-interface applications.

What is the purpose of the NMI output on DS1707ESA+T&R?

The NMI output on DS1707ESA+T&R provides a non-maskable interrupt signal triggered when the voltage at the IN pin falls below 1.25 V. It pulses low for ≥200 µs with 5 µs detection delay and 100 µV hysteresis to reject noise. DS1707ESA+T&R uses NMI to alert firmware of impending power failure, enabling time-critical actions like data save or state capture before reset occurs.

Is DS1707ESA+T&R pin-compatible with other MicroMonitor devices?

Yes, DS1707ESA+T&R is pin-compatible with the MAX707/MAX708 in 8-pin SOIC packages, sharing identical pin assignments for PBRST, VCC, GND, IN, RST, /RST, NC, and NMI. This allows direct substitution in existing layouts designed for those Maxim supervisors, provided the VCC trip point (4.50–4.75 V) and IN-based monitoring requirements align with system needs. DS1707ESA+T&R retains full functional compatibility including reset timing and NMI behavior.