Analog Devices Inc./Maxim Integrated DS1706TESA+T&R

Overview

DS1706TESA+T&R from Maxim Integrated is a 3.3V ±5% precision voltage supervisor IC with watchdog timer, non-maskable interrupt (NMI), and pushbutton reset control. It monitors VCC, senses external supply via IN pin, asserts active-low RST on power failure, and guarantees ≥130 ms reset pulse width. Used in embedded microprocessor systems requiring reliable power-up/power-down sequencing and fault recovery.

For engineers reviewing the DS1706TESA+T&R datasheet, DS1706TESA+T&R pinout, DS1706TESA+T&R application, or DS1706TESA+T&R equivalent, key selection criteria include VCC trip point (3.08 V typ), watchdog timeout (1.0–2.2 s), NMI response latency (5–8 µs), and compatibility with 8-pin SOIC industrial-grade packaging.

Technical Context

The DS1706TESA+T&R implements three independent monitoring functions: (1) precision VCC supervision with 5% tolerance at 3.3V (VCCTP = 3.00–3.15 V), (2) high-impedance IN-pin-based early-warning NMI generation triggered at 1.25 V threshold with 100 µV hysteresis, and (3) 1-second watchdog timer resettable by ST input transitions. All functions operate across –40°C to +85°C.

Its internal bandgap reference enables accurate voltage detection independent of VCC drift; the PBRST input is internally pulled up (40 kΩ typ), and RST output drives ≥10 mA sink current at 0.4 V while maintaining VOH ≥ VCC–0.3 V under 350 µA load.

Key Specifications

Pinout & Package

DS1706TESA+T&R is housed in an 8-pin SOIC (150-mil) package compliant with JEDEC MS-012, with gull-wing leads and 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6361LTT48+T and TPS3808G33DBVR, DS1706TESA+T&R uniquely combines 3.3V ±5% supervision, NMI-based early fault signaling, and a retriggerable watchdog in one 8-pin SOIC-enabling robust fail-safe behavior unattainable with single-function alternatives.

Availability

DS1706TESA+T&R is available at Aetrix Electronics and suitable for industrial automation controllers, medical diagnostic devices, telecom infrastructure units, and automotive infotainment systems requiring stable component supply and long-term lifecycle assurance.

Supply support for DS1706TESA+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, medical, and communications applications.

The DS1706 series belongs to Maxim's MicroMonitor family-engineered specifically for microprocessor system supervision, combining voltage monitoring, watchdog timing, and interrupt generation in compact packages.

FAQ

What is the exact VCC trip point specification for DS1706TESA+T&R?

The DS1706TESA+T&R has a guaranteed VCC trip point of 3.00 V minimum, 3.08 V typical, and 3.15 V maximum at –40°C to +85°C. This ±5% tolerance around 3.3V ensures reliable reset assertion before downstream logic fails, and is explicitly defined for the DS1706T variant in the datasheet's DC Electrical Characteristics table.

Does DS1706TESA+T&R provide both active-high and active-low reset outputs?

No, DS1706TESA+T&R provides only an active-low reset output (RST). The datasheet confirms this variant uses /RST (active-low) and /WDS (active-low) configuration, distinguishing it from DS1706L/P variants that offer active-high RST (*RST). Pin 7 is labeled RST and functions exclusively as open-drain active-low.

How does the watchdog timer in DS1706TESA+T&R interact with the reset function?

The DS1706TESA+T&R watchdog timer starts timing only after RST becomes inactive (i.e., after power-up stabilization). If the ST input is not strobed low within 1.0–2.2 s, WDS goes active-low for ≥130 ms-but WDS assertion does not directly trigger RST. RST remains controlled solely by VCC, IN, or PBRST events unless externally wired (e.g., connecting WDS to PBRST).

Can DS1706TESA+T&R monitor a 5V supply?

No, DS1706TESA+T&R is specified exclusively for 3.3V systems with ±5% tolerance (VCCTP = 3.00–3.15 V). Attempting to use it on 5V violates Absolute Maximum Ratings (VCC max = 5.5V but trip point is not calibrated for 5V). For 5V supervision, DS1706E variants (e.g., DS1706ESA+T&R) with 4.25–4.50 V trip points must be selected.

Is DS1706TESA+T&R RoHS-compliant and lead-free?

Yes, DS1706TESA+T&R is RoHS-compliant and lead-free. The "+" suffix in the part number explicitly denotes lead(Pb)-free/RoHS-compliant packaging per Maxim's ordering information note, and the device meets JEDEC J-STD-609A Class 3 marking requirements for homogeneous material identification.