Analog Devices Inc./Maxim Integrated DS1706TEUA+T&R

Overview

DS1706TEUA+T&R from Maxim Integrated is a 3.3V ±5% microprocessor supervisory circuit with watchdog timer, non-maskable interrupt (NMI), and pushbutton reset control in an 8-pin µSOP package. It monitors VCC, detects software faults via strobe input, and provides active-low reset (RST) and watchdog status (WDS) outputs for embedded systems requiring reliable power-up/power-down sequencing and fault recovery.

For engineers reviewing the DS1706TEUA+T&R datasheet, DS1706TEUA+T&R pinout, DS1706TEUA+T&R application, or DS1706TEUA+T&R equivalent, key selection criteria include VCC trip point (3.00–3.15 V), 130 ms minimum reset pulse width, 1 s watchdog timeout, industrial temperature range (–40°C to +85°C), and compatibility with 3.3V microcontroller power rails and reset architectures.

Technical Context

The DS1706TEUA+T&R implements three independent monitoring functions: precision VCC supervision using an internal bandgap reference and comparator (VCCTP = 3.08 V typ), a 1-second watchdog timer triggered by ST input transitions, and debounced pushbutton reset with guaranteed 130 ms RST assertion. All functions operate within 1.2 V to 5.5 V supply range.

Its NMI output provides early power-fail warning with 1.25 V IN trip point and 100 µV hysteresis, while RST remains active for ≥130 ms after VCC recovery. The device supports external voltage sensing via high-impedance IN pin and integrates internal pull-ups on PBRST (40 kΩ) and ST (180 kΩ).

Key Specifications

Pinout & Package

DS1706TEUA+T&R is housed in an 8-pin µSOP (118-mil) package, RoHS-compliant and lead(Pb)-free. Pin assignments are identical across DS1705/DS1706 family variants in this package type.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX706TESA+, DS1706TEUA+T&R delivers lower operating current (50 µA vs. 60 µA) and tighter production tolerance control; versus TPS3808G33DBVR, it provides full triple-function supervision including NMI and watchdog-critical for safety-critical or autonomous-recovery systems.

Availability

DS1706TEUA+T&R is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, automotive infotainment, and smart energy metering requiring stable component supply and long-term lifecycle support.

Supply support for DS1706TEUA+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 applications.

The DS1706TEUA+T&R belongs to the MicroMonitor™ family-engineered specifically for robust microprocessor supervision in noise-prone, wide-temperature environments where deterministic reset timing and early fault detection are mandatory.

FAQ

What is the exact VCC trip point specification for DS1706TEUA+T&R?

The DS1706TEUA+T&R has a guaranteed VCC trip point of 3.00 V (min), 3.08 V (typ), and 3.15 V (max) - corresponding to ±5% tolerance around 3.3 V. This specification is validated across the full industrial temperature range (–40°C to +85°C) and ensures reliable reset activation before most 3.3 V microcontrollers enter undefined operating states. The DS1706TEUA+T&R datasheet confirms this value under DC Electrical Characteristics.

Does DS1706TEUA+T&R support both active-high and active-low reset outputs?

No, DS1706TEUA+T&R provides only an active-low reset output (RST). The "T" suffix denotes the /RST (active-low) version; variants with active-high RST are labeled "L" (e.g., DS1706LEUA). DS1706TEUA+T&R does not include *RST (active-high) functionality - its pinout and internal logic are configured exclusively for RST. This is confirmed in the Ordering Information table and Pin Assignment diagram.

Can DS1706TEUA+T&R be used with a 5.0 V supply rail?

Yes, DS1706TEUA+T&R operates with supply voltages from 1.2 V to 5.5 V, but its VCC trip point remains fixed at ~3.08 V. When used with a 5.0 V rail, it will assert RST only if VCC drops to ≤3.15 V - making it unsuitable as a primary 5.0 V supervisor. For 5.0 V systems, DS1706EUA (5 V ±10%) or DS1705EUA (5 V ±5%) are appropriate alternatives. DS1706TEUA+T&R is optimized for 3.3 V domains.

What is the watchdog timeout accuracy of DS1706TEUA+T&R?

The DS1706TEUA+T&R watchdog timeout is specified as 1.0 s (min), 1.6 s (typ), and 2.2 s (max) across temperature and supply voltage. This range accounts for process variation and ensures reliable software execution monitoring without false timeouts. The timeout begins when RST becomes inactive and resets on each ST input high-to-low transition. Accuracy is confirmed in the AC Electrical Characteristics table of the official datasheet.

Is DS1706TEUA+T&R RoHS-compliant and lead-free?

Yes, DS1706TEUA+T&R is RoHS-compliant and lead(Pb)-free. The "+" suffix in the part number explicitly indicates compliance with EU RoHS Directive 2011/65/EU. Package markings and ordering information confirm that devices with "+" use matte-tin lead finish and meet JEDEC J-STD-020 reflow profiles. This is documented in the Ordering Information section and Package Information note on page 11 of the datasheet.