Analog Devices Inc. ADM1815-R23ART-RL7

Overview

ADM1815-R23ART-RL7 from Analog Devices is an active-low, open-drain microprocessor reset circuit with internal pull-up resistor, designed for monitoring 2.5 V supply rails. It features a precise 2.31 V (typical) reset threshold, 150 ms reset timeout, −40°C to +105°C operating temperature range, and 3-lead SOT-23 package-used in embedded controllers requiring reliable power-on initialization.

For engineers reviewing the ADM1815-R23ART-RL7 datasheet, ADM1815-R23ART-RL7 pinout, ADM1815-R23ART-RL7 application, or ADM1815-R23ART-RL7 equivalent, key selection criteria include trip point accuracy, reset timeout stability over temperature, open-drain output compatibility with legacy reset inputs, and SC70/SOT-23 footprint interchangeability in space-constrained designs.

Technical Context

The ADM1815-R23ART-RL7 implements a precision voltage comparator with hysteresis and a fixed 150 ms delay timer to prevent false resets during power ramp-up. Its internal reference and bias circuitry ensure stable trip point performance across the full industrial temperature range.

This device belongs to the ADM181x family of supervisory circuits optimized for low quiescent current (≤16 µA at 5.5 V), push-pull or open-drain output flexibility, and manual reset support via external button-though ADM1815 variants lack push-button functionality per datasheet Figure 11 and Section "ADM1813 AND ADM1818".

Key Specifications

Pinout & Package

ADM1815-R23ART-RL7 is housed in a 3-lead SOT-23 (RT-3) package per JEDEC TO-236-AB standard, with 0.95 mm nominal height and coplanarity ≤0.10 mm. Pin 1 is RST (active-low open-drain 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 supervisor applications.

Compared with MAX6326-L23T+T and TPS3808G12DBVR, ADM1815-R23ART-RL7 delivers integrated pull-up functionality and tighter trip point tolerance (±0.06 V) in identical SOT-23-3 footprint, reducing component count and improving reset timing predictability across temperature without layout changes.

Availability

ADM1815-R23ART-RL7 is available at Aetrix Electronics and suitable for industrial motor controllers, medical sensor nodes, and automotive body control modules requiring stable component supply with guaranteed long-term availability and full RoHS compliance.

Supply support for ADM1815-R23ART-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, serving industrial, automotive, communications, and healthcare markets since 1965.

The ADM181x series was engineered specifically for cost-sensitive, space-constrained microprocessor supervision in industrial and automotive environments-emphasizing low power, precision thresholds, and robust reset timing without external components.

FAQ

What is the exact reset threshold voltage for ADM1815-R23ART-RL7?

The ADM1815-R23ART-RL7 has a specified reset threshold of 2.25 V (min), 2.31 V (typ), and 2.37 V (max) at TA = −40°C to +105°C. This 2.31 V typical value targets reliable supervision of 2.5 V supply rails with adequate noise margin, as confirmed in Table 1 of the Rev. F datasheet under "VCC TRIP POINT" for "ADM1815-R23".

Does ADM1815-R23ART-RL7 support manual reset via push-button?

No, ADM1815-R23ART-RL7 does not support manual reset. Only ADM1813 and ADM1818 variants include push-button functionality, as explicitly stated in the "ADM1813 AND ADM1818" section (Page 7) and functional block diagrams-ADM1815 devices lack the internal circuitry for button detection and extended reset hold.

What is the output configuration of ADM1815-R23ART-RL7?

ADM1815-R23ART-RL7 features an active-low open-drain output with an internal 5.5 kΩ pull-up resistor (typical), as documented in Table 1 ("INTERNAL PULL-UP RESISTOR") and Pin Function Descriptions (Page 5). This allows direct interfacing with microcontroller reset inputs without external components in most cases.

Is ADM1815-R23ART-RL7 RoHS compliant?

Yes, ADM1815-R23ART-RL7 is RoHS compliant. The "Z" suffix in ordering codes (e.g., ADM1815-R23ARTZ-RL7) denotes RoHS compliance, and the RL7 tape-and-reel packaging variant used in this part number meets EU Directive 2011/65/EU requirements, as noted in the Ordering Guide footnote "2 Z = RoHS Compliant Part."

What package type does ADM1815-R23ART-RL7 use?

ADM1815-R23ART-RL7 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 (Page 9). Its dimensions comply with JEDEC TO-236-AB: 2.90 mm × 1.30 mm body size, 0.95 mm max height, and 0.95 mm lead pitch.