Analog Devices Inc. ADM1816-R23ARTZ-R7

Overview

ADM1816-R23ARTZ-R7 from Analog Devices is a precision 3-lead SOT-23 open-drain microprocessor reset circuit with internal pull-up resistor, designed to monitor 2.5 V supply rails. It features a typical reset threshold of 2.31 V, 150 ms reset timeout, −40°C to +105°C operating temperature range, and ultra-low quiescent current (≤10 µA at 3.6 V). It ensures safe system initialization in embedded controllers and industrial microprocessor systems.

For engineers reviewing the ADM1816-R23ARTZ-R7 datasheet, ADM1816-R23ARTZ-R7 pinout, ADM1816-R23ARTZ-R7 application, or ADM1816-R23ARTZ-R7 equivalent, key selection criteria include reset threshold tolerance (±2.5% typical), internal pull-up value (5.5 kΩ nominal), SC70/SOT-23 package compatibility, push-button reset capability, and guaranteed operation across automotive-grade temperature extremes.

Technical Context

The ADM1816-R23ARTZ-R7 implements a precision bandgap-based voltage reference with comparator and 150 ms monostable delay to prevent spurious resets during power-up transients. Its open-drain output with integrated 5.5 kΩ pull-up enables direct interface to microcontroller reset inputs requiring active-low assertion and I²C-compatible logic levels.

Unlike push-pull variants (e.g., ADM1815/ADM1817), this device uses open-drain architecture for flexible voltage-level translation and wired-OR reset bus configurations. It belongs to the ADM181x family optimized for low-cost, space-constrained applications where external components must be minimized.

Key Specifications

Pinout & Package

ADM1816-R23ARTZ-R7 is housed in a RoHS-compliant 3-lead SOT-23 (RT-3) package with JEDEC TO-236-AB outline. 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 MAX6326-L23T and TPS3808G12DBVR, ADM1816-R23ARTZ-R7 delivers integrated pull-up functionality and tighter threshold accuracy (±2.5% vs ±3.5%), making it optimal for cost-sensitive, space-constrained 2.5 V reset applications without sacrificing reliability.

Availability

ADM1816-R23ARTZ-R7 is available at Aetrix Electronics and suitable for industrial control, automotive electronics, medical instrumentation, and smart metering applications requiring stable component supply and long-term lifecycle support.

Supply support for ADM1816-R23ARTZ-R7 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 ADM181x product line was engineered specifically for cost-effective, low-power microprocessor reset supervision in space-constrained industrial and automotive systems, emphasizing precision threshold stability and minimal external component count.

FAQ

What is the exact reset threshold voltage of ADM1816-R23ARTZ-R7?

The ADM1816-R23ARTZ-R7 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 under the "ADM1815-R23, ADM1816-R23, ADM1817-R23, ADM1818-R23" row and applies directly to the ADM1816-R23ARTZ-R7 variant.

Does ADM1816-R23ARTZ-R7 require an external pull-up resistor?

No, ADM1816-R23ARTZ-R7 does not require an external pull-up resistor. It integrates a 5.5 kΩ nominal internal pull-up on the RST pin, as confirmed in Table 1 ("INTERNAL PULL-UP RESISTOR") and functional block diagram Figure 1. This feature eliminates the need for external components and simplifies schematic design for active-low reset interfaces.

Can ADM1816-R23ARTZ-R7 be used with a manual push-button reset?

No, ADM1816-R23ARTZ-R7 does not support manual push-button reset functionality. That feature is exclusive to the ADM1813 and ADM1818 variants per the "ADM1813 AND ADM1818" section (Page 7). ADM1816-R23ARTZ-R7 is functionally identical to ADM1811/ADM1816 - open-drain with internal pull-up only, no push-button timing circuitry.

What package type and dimensions does ADM1816-R23ARTZ-R7 use?

ADM1816-R23ARTZ-R7 uses the 3-lead SOT-23 (RT-3) package, compliant with JEDEC TO-236-AB standards. Its dimensions are 2.90 mm × 1.30 mm × 1.02 mm (L × W × H), with 0.95 mm pitch between pins 1 and 2, as shown in Figure 15 (Page 8) of the Rev. F datasheet.

Is ADM1816-R23ARTZ-R7 RoHS compliant and lead-free?

Yes, ADM1816-R23ARTZ-R7 is RoHS compliant and lead-free. The "Z" suffix in the part number explicitly denotes RoHS compliance per Analog Devices' ordering guide (Page 9, footnote 2: "Z = RoHS Compliant Part"), and it meets JEDEC J-STD-609 Category 1 marking requirements.