Analog Devices Inc. ADM1818-20ARTZ-RL7

Overview

ADM1818-20ARTZ-RL7 from Analog Devices is a microprocessor reset circuit with open-drain output and internal 5.5 kΩ pull-up resistor, designed for monitoring 3 V supply rails. It features a 2.55 V (typical) reset threshold, 150 ms reset timeout, −40°C to +105°C operating temperature range, and SOT-23 package. It supports manual push-button reset initiation in embedded controllers and industrial instrumentation.

For engineers reviewing the ADM1818-20ARTZ-RL7 datasheet, ADM1818-20ARTZ-RL7 pinout, ADM1818-20ARTZ-RL7 application, or ADM1818-20ARTZ-RL7 equivalent, key selection criteria include trip point accuracy (±2.5% over temperature), low quiescent current (≤10 µA at 3.6 V), push-button reset timing (1 µs detect → 150 ms active), and compatibility with 3 V microcontroller reset inputs requiring active-low assertion.

Technical Context

The ADM1818-20ARTZ-RL7 integrates a precision voltage reference, comparator, and 150 ms delay timer to ensure reliable power-on reset sequencing. Its open-drain RST output with internal pull-up eliminates external components while enabling wired-OR configuration with other reset sources.

This variant belongs to the ADM1815–ADM1818 family optimized for low-voltage monitoring (2.18 V to 3.15 V trip points) and supports manual reset via direct connection of a push-button between RST and GND - triggering a guaranteed 150 ms reset pulse upon button release.

Key Specifications

Pinout & Package

ADM1818-20ARTZ-RL7 is housed in a 3-lead SOT-23 (RT-3) package with JEDEC TO-236-AB compliance, footprint dimensions 2.90 mm × 1.30 mm × 1.02 mm, and coplanarity ≤0.10 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage monitor with reset applications.

Compared with MAX809SEUR+T and TPS3808G12DBVR, the ADM1818-20ARTZ-RL7 uniquely combines factory-trimmed 2.55 V threshold, integrated 5.5 kΩ pull-up, and guaranteed push-button reset timing - reducing BOM count and validation effort in cost-constrained industrial designs.

Availability

ADM1818-20ARTZ-RL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and portable medical sensor hubs requiring stable component supply and RoHS-compliant packaging.

Supply support for ADM1818-20ARTZ-RL7 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADM181x series was engineered specifically for reliable, low-cost microprocessor supervision in space-constrained industrial and automotive applications - emphasizing simplicity, accuracy, and extended temperature operation.

FAQ

What is the exact reset threshold voltage of the ADM1818-20ARTZ-RL7?

The ADM1818-20ARTZ-RL7 has a nominal reset threshold of 2.55 V, with a guaranteed range of 2.47 V (min) to 2.64 V (max) over −40°C to +105°C. This value is factory-trimmed and specified in Table 1 of the Rev. F datasheet under the "ADM1815-20" row, confirming its suitability for 3 V supply monitoring with adequate noise margin.

Does the ADM1818-20ARTZ-RL7 require an external pull-up resistor?

No, the ADM1818-20ARTZ-RL7 includes an internal 5.5 kΩ pull-up resistor on the RST pin, eliminating the need for external components. This is explicitly documented in Table 1 ("INTERNAL PULL-UP RESISTOR") and confirmed for ADM1813/ADM1818 variants - enabling direct interface to 3 V microcontrollers without additional passives.

Can the ADM1818-20ARTZ-RL7 be used with a push-button for manual reset?

Yes, the ADM1818-20ARTZ-RL7 supports manual reset via a push-button connected between RST and GND. As described in the "ADM1813 AND ADM1818" section (Page 7), pressing the button pulls RST low, and upon release, the device guarantees a 150 ms reset pulse - with detection latency under 1 µs.

What package type does the ADM1818-20ARTZ-RL7 use?

The ADM1818-20ARTZ-RL7 uses the 3-lead SOT-23 (RT-3) package, per the Ordering Guide (Page 9) and Outline Dimensions (Page 8). The "RTZ" suffix denotes RoHS-compliant SOT-23 packaging, with JEDEC TO-236-AB mechanical compliance and 2.90 mm × 1.30 mm footprint.

What is the supply current consumption of the ADM1818-20ARTZ-RL7?

The ADM1818-20ARTZ-RL7 draws ≤10 µA at VCC = 3.6 V and ≤16 µA at VCC = 5.5 V, as specified in the "Current" row of Table 1. This ultra-low quiescent current is measured under no-load conditions with VCC above the reset threshold, making it suitable for battery-critical applications.