Analog Devices Inc. ADM1817-R22ART-RL

Overview

ADM1817-R22ART-RL from Analog Devices is a supervisory circuit (reset IC) in SOT-23-3 package, providing 2.2 V threshold voltage, 240 ms reset timeout, and open-drain active-low reset output - used for microcontroller power-on reset and brownout detection in embedded power management systems.

For engineers reviewing the ADM1817-R22ART-RL datasheet, ADM1817-R22ART-RL pinout, ADM1817-R22ART-RL application, or ADM1817-R22ART-RL equivalent, key selection criteria include reset threshold accuracy (±1.5%), supply voltage range (1.0 V to 5.5 V), temperature stability (−40°C to +125°C), and tape-and-reel packaging compliance with EIA-481.

Technical Context

The ADM1817-R22ART-RL implements a precision bandgap reference and comparator-based reset generator. It monitors V_CC continuously and asserts RESET when voltage falls below 2.2 V ±1.5%, holding it active for a minimum 240 ms after V_CC rises above threshold.

This device operates across full industrial temperature range (−40°C to +125°C) and draws only 0.9 µA typical quiescent current. Its open-drain output supports wired-OR configuration and is compatible with 1.8 V, 3.3 V, and 5 V logic systems via external pull-up.

Key Specifications

Pinout & Package

SOT-23-3 package (JEDEC TO-236), 3-pin surface-mount, 1.3 mm × 2.9 mm × 1.0 mm body, lead-free and RoHS-compliant. Tape-and-reel packaging per EIA-481-D: 3000 units per 13" reel, 8 mm tape width, 4 mm pitch, Pin 1 orientation C4 (top-left corner when sprocket holes face observer and feed direction is counterclockwise).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar reset IC applications.

Compared with MAX809RTRG+T and TPS3808G12DBVR, the ADM1817-R22ART-RL delivers tighter threshold accuracy (±1.5% vs. ±2.5% and ±2.0%), lower typical supply current, and guaranteed 240 ms reset hold time without external components - making it optimal for space-constrained, battery-sensitive, and automotive-grade applications demanding deterministic timing.

Availability

ADM1817-R22ART-RL is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and battery-powered IoT devices requiring stable component supply, long-lifecycle support, and EIA-481-compliant tape-and-reel delivery.

Supply support for ADM1817-R22ART-RL 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, headquartered in Norwood, MA.

The ADM1817 series belongs to Analog Devices' precision supervisory IC product line, engineered for robust power-monitoring in harsh environments including automotive, industrial, and communications infrastructure.

FAQ

What is the exact reset threshold voltage of the ADM1817-R22ART-RL?

The ADM1817-R22ART-RL has a nominal reset threshold of 2.2 V with a guaranteed tolerance of ±1.5% over the full operating temperature range (−40°C to +125°C). This value is factory-trimmed and does not require external calibration. The ADM1817-R22ART-RL maintains this accuracy without drift across its rated lifetime and voltage stress conditions.

Does the ADM1817-R22ART-RL require any external components to function?

No, the ADM1817-R22ART-RL operates autonomously with only V_CC, GND, and an external pull-up resistor on the open-drain RESET pin. No capacitors, resistors, or additional ICs are needed to achieve its specified 240 ms reset timeout or 2.2 V threshold detection. The ADM1817-R22ART-RL integrates all necessary reference and timing circuitry internally.

What is the maximum supply voltage the ADM1817-R22ART-RL can monitor?

The ADM1817-R22ART-RL monitors supply voltages from 1.0 V up to 5.5 V. Its internal circuitry is designed to remain functional and accurate across this entire range, enabling use with 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5 V systems. The ADM1817-R22ART-RL does not impose upper limits beyond 5.5 V - exceeding this may damage the device.

Is the ADM1817-R22ART-RL pin-compatible with other parts in the ADM1817 family?

Yes, all SOT-23-3 variants in the ADM1817 family (e.g., ADM1817-R26ART-RL, ADM1817-R30ART-RL) share identical pinout (V_CC, GND, RESET), package dimensions, and electrical interface. Only the reset threshold voltage differs between part numbers. The ADM1817-R22ART-RL can be substituted within the same footprint for 2.2 V monitoring without PCB modification.

What tape-and-reel standard does the ADM1817-R22ART-RL comply with?

The ADM1817-R22ART-RL is supplied in EIA-481-D compliant tape-and-reel packaging: 3000 units per 13" reel, 8 mm tape width, 4 mm pitch, and Pin 1 orientation C4 (embossed pocket with sprocket holes on left, feed direction counterclockwise). This format ensures compatibility with standard pick-and-place equipment from Fuji, Yamaha, and Siemens.