Analog Devices Inc./Maxim Integrated DS1706PESA

Overview

DS1706PESA from Maxim Integrated is a 3.3V ±20% precision voltage supervisor IC with active-high reset output (RST), watchdog timer, non-maskable interrupt (NMI), and pushbutton reset debouncing - designed for microprocessor monitoring in industrial embedded systems requiring reliable power-up/power-down sequencing and fault recovery.

For engineers reviewing the DS1706PESA datasheet, DS1706PESA pinout, DS1706PESA application, or DS1706PESA equivalent, key selection considerations include its 2.55V–2.70V VCC trip point, 130ms minimum reset pulse width, 1s watchdog timeout, -40°C to +85°C operation, and compatibility with 3.0V system rails.

Technical Context

The DS1706PESA integrates three independent monitoring functions: (1) VCC supply supervision with temperature-compensated 2.63V typical trip point and hysteresis; (2) IN-pin-based external voltage sensing (1.25V threshold) for early power-fail warning via NMI; and (3) ST-input-triggered watchdog timer with 1.0–2.2s timeout window and WDS status output.

Its RST output is active-high (distinct from /RST variants), enabling direct interface with processors requiring high-asserted reset signals; PBRST debounces pushbutton inputs and guarantees ≥130ms reset assertion upon release; all logic operates across 1.2V–5.5V VCC with <60µA quiescent current at 5.5V.

Key Specifications

Pinout & Package

DS1706PESA is housed in an 8-pin SOIC (150-mil) package with gull-wing leads, RoHS-compliant matte tin plating, and JEDEC MS-012AC footprint compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX706TESA and TPS3808G33DBVR, DS1706PESA uniquely combines active-high reset, ±20% 3.3V tolerance for 3.0V compatibility, integrated NMI, and ST-driven watchdog - making it the only option among the three that supports staged fault response and 3.0V system deployment without redesign.

Availability

DS1706PESA is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, telecom remote terminal units, and smart energy meters requiring stable component supply across extended product lifecycles.

Supply support for DS1706PESA 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 semiconductor company specializing in analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The DS1706PESA belongs to Maxim's MicroMonitor™ family of voltage supervisors, engineered specifically for robust microprocessor supervision in mission-critical embedded systems demanding coordinated power, watchdog, and interrupt functionality.

FAQ

What is the exact VCC trip point range for DS1706PESA?

The DS1706PESA has a specified VCC trip point range of 2.55V to 2.70V, with a typical value of 2.63V. This ±20% tolerance around 3.3V enables reliable operation with 3.0V nominal supply rails. The trip point is temperature-compensated and tested across the full -40°C to +85°C operating range. DS1706PESA uses this threshold to assert its active-high RST output during brownout conditions.

Does DS1706PESA provide both active-high and active-low reset outputs?

No, DS1706PESA provides only an active-high reset output (RST). It does not include an active-low /RST output. This distinguishes it from other variants like DS1706RESA (which offers /RST) or DS1706LESA (which offers RST and /WDS). The DS1706PESA's single RST pin is push-pull and directly compatible with MCUs requiring high-asserted reset signals without external inversion.

How does the watchdog timer in DS1706PESA function, and what is its timeout window?

The DS1706PESA watchdog timer initiates timing upon RST deactivation and requires a high-to-low transition on the ST pin at least once every 1.0–2.2 seconds to prevent timeout. If ST is not strobed within that window, WDS goes active-low for ≥130ms. The timeout is factory-trimmed and tested at 2.7V for 3.3V devices. DS1706PESA uses this to detect firmware hangs independently of clock sources or software polling.

Can DS1706PESA monitor voltages other than VCC, and how is that implemented?

Yes, DS1706PESA can monitor external voltages via its IN pin, which compares the applied voltage against an internal 1.25V reference. A resistor divider scales higher voltages (e.g., 12V) down to the 1.25V threshold. The IN pin has ≤1µA leakage and high impedance, minimizing loading. DS1706PESA generates an NMI pulse when the scaled voltage crosses the threshold, enabling early warning before VCC collapse.

Is DS1706PESA pin-compatible with other members of the DS1705/DS1706 family?

Yes, DS1706PESA is pin-compatible with all 8-pin SOIC variants in the DS1705/DS1706 family, including DS1706RESA, DS1706SESA, and DS1706TESA. All share identical SOIC-8 (150-mil) footprints and pin assignments. However, functional differences exist - e.g., DS1706PESA provides RST (active-high), while DS1706RESA provides /RST (active-low) - so PCB design must match the selected variant's output polarity and feature set.