Analog Devices Inc./Maxim Integrated DS1708TESA/T&R

Overview

DS1708TESA/T&R from Maxim Integrated is a 3.3V ±5% precision voltage supervisor IC that monitors VCC, senses external supply voltage via high-impedance IN pin, and debounces pushbutton reset input. It delivers active-low and active-high reset outputs (RST and RST), non-maskable interrupt (NMI), and guarantees ≥130 ms reset pulse width. Used in embedded microprocessor systems requiring reliable power-up sequencing and early power-fail warning.

For engineers reviewing the DS1708TESA/T&R datasheet, DS1708TESA/T&R pinout, DS1708TESA/T&R application, or DS1708TESA/T&R equivalent, key selection criteria include its 3.3V ±5% VCC trip point (3.00–3.15 V), industrial temperature range (−40°C to +85°C), dual reset outputs with 130 ms minimum assertion time, and compatibility with 8-pin SOIC packaging for space-constrained PCB layouts.

Technical Context

The DS1708TESA/T&R implements a precision bandgap-referenced comparator architecture to monitor VCC and an independent high-impedance sense input (IN) referenced to 1.25 V internal threshold. Its NMI output provides early warning of supply decay with 200 µs pulse width and built-in 100 µV hysteresis to reject noise.

It integrates pushbutton debouncing logic with guaranteed 130 ms reset pulse generation upon PBRST release, and features dual complementary reset outputs (RST and RST) asserted during power-down and held active for ≥130 ms after power-up. All functions operate across 1.2 V to 5.5 V supply range with <60 µA quiescent current at VCC < 5.5 V.

Key Specifications

Pinout & Package

DS1708TESA/T&R is housed in an 8-pin SOIC (150-mil) package with exposed pad not present. Pin assignments are standardized across DS1707/DS1708 family variants and validated per Maxim's mechanical drawings.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326UT46D3+T and TPS3808G33DBVR, DS1708TESA/T&R uniquely combines 3.3 V ±5% supervision, dual complementary reset outputs, NMI early-warning interrupt, and user-programmable IN voltage sensing - making it optimal for systems requiring layered power-fail response and flexible supply monitoring.

Availability

DS1708TESA/T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic equipment, telecom remote terminal units, smart energy meters, and other applications requiring stable component supply with guaranteed long-term availability.

Supply support for DS1708TESA/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 demanding industrial, automotive, and communications applications.

The DS1707/DS1708 family was engineered to provide robust, multi-function power supervision for microprocessor-based systems-integrating reset generation, pushbutton control, and early power-fail warning in a single 8-pin package.

FAQ

What is the exact VCC trip point range for DS1708TESA/T&R?

The DS1708TESA/T&R has a guaranteed VCC trip point range of 3.00 V to 3.15 V, corresponding to ±5% tolerance around a nominal 3.3 V supply. This specification is validated over the full −40°C to +85°C operating temperature range and is documented in the DC Electrical Characteristics table of the official Maxim datasheet. The DS1708TESA/T&R uses an internal temperature-compensated bandgap reference to maintain this accuracy across voltage and temperature variations.

Does DS1708TESA/T&R support monitoring of voltages higher than 3.3 V?

Yes, DS1708TESA/T&R supports monitoring of higher voltages via its IN pin, which has a fixed 1.25 V internal threshold. By using an external resistor divider (e.g., R1 = 26 kΩ, R2 = 10 kΩ), the DS1708TESA/T&R can safely monitor supplies up to 11.88 V while maintaining accuracy. The IN pin is high-impedance (<1 µA leakage), minimizing loading on the monitored circuit, and the voltage at IN must not exceed VCC to prevent damage.

How does the NMI output of DS1708TESA/T&R differ from the RST outputs?

The NMI output of DS1708TESA/T&R provides an early-warning signal (≥200 µs low pulse) when the IN pin voltage drops below 1.25 V, occurring before RST/RST assertion. In contrast, RST and RST are system reset signals activated when VCC falls below its trip point (3.00–3.15 V) and held active for ≥130 ms. This staged response allows DS1708TESA/T&R to enable graceful shutdown or data save operations before hard reset.

Is DS1708TESA/T&R pin-compatible with other devices in the DS1707/DS1708 family?

Yes, DS1708TESA/T&R is pin-compatible with all members of the DS1707/DS1708 family in the same package type-including DS1707ESA, DS1708ESA, DS1708RESA, and DS1708SESA-sharing identical 8-pin SOIC (150-mil) pinout, terminal functions, and PCB footprint. This allows direct substitution within the same voltage-monitoring configuration without layout changes.

What is the reset pulse width guarantee for DS1708TESA/T&R during pushbutton operation?

DS1708TESA/T&R guarantees a minimum reset pulse width of 130 ms when triggered by the PBRST pin, measured from the moment the pushbutton is released (PBRST transitions from low to high). This timing is internally generated and independent of button press duration or contact bounce, eliminating the need for external RC debounce networks. The same 130 ms minimum applies to power-up and power-down reset assertion.