Analog Devices Inc./Maxim Integrated ADPL62933UK29D3S+T

Overview

ADPL62933UK29D3S+T from Analog Devices is a nanopower microprocessor supervisory IC in a 5-pin SOT23 package, providing voltage monitoring (factory-trimmed 2.925V reset threshold), watchdog timer (3.3s typical timeout), manual reset input, and open-drain active-low RESET output. It draws only 200nA typical supply current and guarantees valid reset assertion down to VCC = 1.1V, making it ideal for ultra-low-power battery-operated medical and portable electronics.

For engineers reviewing the ADPL62933UK29D3S+T datasheet, ADPL62933UK29D3S+T pinout, ADPL62933UK29D3S+T application, or ADPL62933UK29D3S+T equivalent, key selection criteria include its 2.925V reset threshold (suffix "29"), 300ms minimum reset timeout (suffix "D3"), 3.3s watchdog period (suffix "S"), guaranteed operation from –40°C to +85°C, and compatibility with 1.7V–5.5V supply rails.

Technical Context

The ADPL62933UK29D3S+T integrates three independent supervision functions: a precision voltage monitor with ±3% threshold tolerance and 0.5% hysteresis, a watchdog timer that resets on missing edges at WDI (pulse width ≥150ns), and a debounced manual reset input with 1µs minimum pulse width and internal 10kΩ pullup. All functions drive a single open-drain RESET output with 0.3V max VOL at 1.2mA sink.

Its architecture ensures immunity to short VCC transients (e.g., ≤40µs at 100mV overdrive) and maintains functional reset validity even as VCC drops to 1.1V - critical for brownout recovery in energy-constrained systems. The device requires no external components beyond a 0.1µF VCC bypass capacitor.

Key Specifications

Pinout & Package

Package: 5-pin SOT23 (U5+2 outline, JEDEC MO-178AA), footprint-compatible with industry-standard 5-lead SOT-23 layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326UT29D3+ and TPS3808G33DBVR, the ADPL62933UK29D3S+T uniquely delivers 2.925V precision threshold, 300ms timeout, and 200nA current in one SOT23-5 package - enabling longer battery life and tighter voltage-margin designs without trade-offs in supervision reliability.

Availability

ADPL62933UK29D3S+T is available at Aetrix Electronics and suitable for portable medical devices, wearable health monitors, industrial handheld scanners, and low-power IoT edge nodes requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for ADPL62933UK29D3S+T 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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and healthcare markets.

The ADPL62933UK29D3S+T belongs to Analog Devices' nanopower supervisor product line, engineered specifically for battery-critical applications where sub-µA current, precise voltage thresholds, and robust watchdog supervision are mandatory for regulatory compliance and field reliability.

FAQ

What is the factory-trimmed reset threshold voltage of the ADPL62933UK29D3S+T?

The ADPL62933UK29D3S+T has a factory-trimmed reset threshold voltage of 2.925V (typical), with ±3% tolerance over temperature. This value is encoded in the "29" suffix per Table 1 of the datasheet and is laser-trimmed during production to eliminate external resistor networks and ensure accuracy without calibration.

Does the ADPL62933UK29D3S+T require an external pullup resistor on the RESET pin?

Yes, the ADPL62933UK29D3S+T features an open-drain RESET output and requires an external pullup resistor to the target logic supply (e.g., 1.8V, 3.3V, or 5V). Typical values range from 10kΩ to 100kΩ depending on rise-time requirements and bus loading; no internal pullup exists on the RESET pin itself.

What is the watchdog timeout period for the ADPL62933UK29D3S+T, and how is it triggered?

The ADPL62933UK29D3S+T has a watchdog timeout period of 3.3s (typical), denoted by the "S" suffix. It is triggered when no rising or falling edge occurs at the WDI pin for longer than 3.3s; the internal timer clears on every WDI edge, MR assertion, or RESET assertion.

Can the ADPL62933UK29D3S+T operate with a supply voltage lower than 1.7V?

No - the ADPL62933UK29D3S+T is specified for operation from 1.7V to 5.5V. However, its RESET output remains valid and asserted down to VCC = 1.1V, meaning it continues to function as a reset source during brownout conditions below 1.7V, though internal circuitry may not be fully operational.

How is the reset timeout period configured on the ADPL62933UK29D3S+T?

The reset timeout period is factory-configured and encoded in the part number: "D3" specifies a 300ms minimum timeout (150ms typical, 300ms min, 300ms max per Table 3). This parameter is fixed per device and cannot be adjusted externally - no pins, registers, or external components modify the timeout duration.