Analog Devices Inc. ADM1816-R23ART-RL

Overview

ADM1816-R23ART-RL from Analog Devices is a precision microprocessor reset circuit with open-drain output and internal pull-up resistor, designed to monitor 2.5 V supply rails. It features a 2.31 V typical reset threshold, 150 ms reset timeout, −40°C to +105°C operating range, and 3-lead SOT-23 package-used in industrial controllers for reliable power-on initialization.

For engineers reviewing the ADM1816-R23ART-RL datasheet, ADM1816-R23ART-RL pinout, ADM1816-R23ART-RL application, or ADM1816-R23ART-RL equivalent, key selection criteria include reset threshold accuracy, open-drain compatibility with legacy microcontroller reset inputs, thermal stability over extended temperature range, and SOT-23 footprint constraints in space-constrained embedded designs.

Technical Context

The ADM1816-R23ART-RL implements a bandgap-based voltage reference with comparator and 150 ms monostable delay to ensure safe system startup after power stabilization. Its internal 5.5 kΩ pull-up resistor eliminates external components required for open-drain reset signaling.

This device belongs to the ADM181x family of single-supply voltage monitors optimized for low quiescent current (≤16 µA at 5.5 V) and high noise immunity, with trip point tolerance of ±1.5% over temperature and guaranteed reset assertion during brownout conditions down to 1.2 V supply.

Key Specifications

Pinout & Package

ADM1816-R23ART-RL is housed in a 3-lead SOT-23 (RT-3) package with JEDEC TO-236-AB compliance. Pin 1 is RST (active-low open-drain reset output), Pin 2 is VCC (monitored supply input), and Pin 3 is GND (0 V reference).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809RTRG+T and TPS3808G12DBVR, ADM1816-R23ART-RL delivers identical 2.3 V-class threshold accuracy with integrated pull-up and minimal footprint-reducing design complexity and test validation effort for cost-sensitive industrial 2.5 V rail supervision.

Availability

ADM1816-R23ART-RL is available at Aetrix Electronics and suitable for industrial controllers, automotive body electronics, medical sensor hubs, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADM1816-R23ART-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The ADM181x product line was engineered specifically for robust, low-cost power supply monitoring in microprocessor-based systems-emphasizing thermal stability, minimal external components, and qualification for harsh operating environments.

FAQ

What is the exact reset threshold voltage of ADM1816-R23ART-RL?

The ADM1816-R23ART-RL has a typical reset threshold of 2.31 V, with a guaranteed range of 2.25 V to 2.37 V over the full −40°C to +105°C operating temperature range. This value is specified in Table 1 of the Rev. F datasheet and applies specifically to the R23 variant, ensuring precise supervision of 2.5 V supply rails without undershoot-induced false resets.

Does ADM1816-R23ART-RL require an external pull-up resistor?

No, ADM1816-R23ART-RL includes an internal 5.5 kΩ pull-up resistor on the RST pin, confirmed in Table 1 of the datasheet under "INTERNAL PULL-UP RESISTOR" for ADM1816 devices. This eliminates the need for external components when interfacing with standard microcontroller reset inputs that accept open-drain signals.

What is the reset timeout duration for ADM1816-R23ART-RL?

The ADM1816-R23ART-RL provides a typical reset timeout of 150 ms, with a guaranteed range of 100 ms to 250 ms after VCC rises above the threshold. This delay is generated internally and ensures sufficient time for power supply stabilization before releasing the reset signal to the microprocessor.

Which package type does ADM1816-R23ART-RL use?

ADM1816-R23ART-RL uses the 3-lead SOT-23 (RT-3) package, as indicated by the "ART" suffix in the part number and confirmed in the Ordering Guide on page 9 of the datasheet. Its dimensions comply with JEDEC TO-236-AB standards and are detailed in Figure 15.

Can ADM1816-R23ART-RL monitor supplies below 2.5 V?

Yes, ADM1816-R23ART-RL operates with supply voltages as low as 1.2 V and maintains reset assertion down to that level. While its 2.31 V threshold targets 2.5 V rails, the device remains functional during brownout conditions and supports supervision of lower-voltage logic domains when used with appropriate external scaling networks.