Analog Devices Inc./Maxim Integrated DS1706TESA

Overview

DS1706TESA from Maxim Integrated is a 3.3V ±5% precision voltage supervisor IC with watchdog timer, non-maskable interrupt (NMI), and pushbutton reset control - designed to halt and restart microprocessors during power transients or software faults. It delivers 130 ms minimum active-low reset pulse, 1.0 s watchdog timeout, and operates across -40°C to +85°C in industrial systems requiring reliable power-up/power-down sequencing.

For engineers reviewing the DS1706TESA datasheet, DS1706TESA pinout, DS1706TESA application, or DS1706TESA equivalent, key selection considerations include its 3.3V ±5% VCC trip point (VCCTP = 3.00–3.15 V), 130 ms reset assertion time, NMI early-warning capability at IN pin, and compatibility with 8-pin SOIC footprint for embedded microcontroller supervision.

Technical Context

The DS1706TESA implements three independent monitoring functions: (1) VCC supply monitoring with precision bandgap reference and comparator generating /RST on undervoltage; (2) high-impedance IN pin sensing external supply voltage (trip point 1.25 V) to trigger NMI for early power-fail warning; (3) ST-input-driven watchdog timer with 1.0–2.2 s timeout window and WDS status output.

Its internal architecture includes debounced PBRST input, temperature-compensated VCCTP detection, hysteresis on NMI (100 µV), and noise immunity rejecting <2 µs glitches. Reset remains active ≥130 ms after VCC recovery, ensuring stable processor initialization before execution resumes.

Key Specifications

Pinout & Package

DS1706TESA is supplied in an 8-pin SOIC (150-mil) package with standard JEDEC MS-012AC outline, compatible with automated SMT assembly and reflow profiles per RoHS-compliant lead-free process.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX706TESA, DS1706TESA offers identical supervision behavior and sourcing continuity; versus TPS3808G33DBVR, it adds critical NMI and watchdog capabilities essential for safety-critical or unattended operation - making DS1706TESA the only choice when multi-layer fault detection is required.

Availability

DS1706TESA is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic equipment, automotive infotainment head units, smart grid communication gateways, and battery-powered edge sensors requiring stable component supply and long-term lifecycle support.

Supply support for DS1706TESA 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications markets.

The DS1706 series belongs to Maxim's MicroMonitor product line - engineered specifically for robust microprocessor supervision in harsh environments where power integrity, software reliability, and early fault detection are mission-critical.

FAQ

What is the exact VCC trip point range for DS1706TESA?

The DS1706TESA has a specified VCC trip point (VCCTP) of 3.00 V minimum, 3.08 V typical, and 3.15 V maximum - corresponding to ±5% tolerance around 3.3 V. This range is guaranteed over the full -40°C to +85°C operating temperature and ensures consistent reset activation across environmental conditions. The DS1706TESA datasheet confirms this specification in the DC Electrical Characteristics table under "VCC Trip Point DS1706T".

Does DS1706TESA provide both active-high and active-low reset outputs?

No, DS1706TESA provides only an active-low reset output (/RST). The part marking "T" indicates the /RST variant (3.3V-5% MONITOR, /RST, /WDS), distinct from DS1706L or DS1706P which offer active-high RST. Pin 7 is dedicated to /RST; there is no complementary active-high reset pin on DS1706TESA.

Can DS1706TESA monitor voltages other than 3.3V?

Yes, DS1706TESA can monitor higher DC voltages using the IN pin with an external resistor divider. Its internal 1.25 V reference (VTP = 1.20–1.30 V) allows scaling of inputs up to 11.88 V (e.g., 4.5 V sense point with 3.3 V VCC). The DS1706TESA datasheet provides the exact equation and example calculation in Figure 5 to determine R1/R2 values for any target sense voltage.

What is the watchdog timeout behavior of DS1706TESA?

The DS1706TESA watchdog timer times out between 1.0 s and 2.2 s if the ST input is not strobed low before expiration. Upon timeout, WDS goes active-low for ≥130 ms. The timer starts counting after /RST becomes inactive, and each high-to-low ST transition resets the counter. This behavior is confirmed in the AC Electrical Characteristics table under "Watchdog Timeout tTD".

Is DS1706TESA pin-compatible with MAX706ESA?

Yes, DS1706TESA is pin-compatible with MAX706ESA - both are 8-pin SOIC devices with identical pin assignments, electrical characteristics, and timing parameters. The DS1706TESA datasheet explicitly states "Pin-compatible with the MAXIM MAX705/MAX706 in 8-pin DIP, 8-pin SOIC, and μ-SOP", confirming direct substitution without layout changes.