Analog Devices Inc. ADM1815-20AKSZ-RL

Overview

ADM1815-20AKSZ-RL from Analog Devices is an active-low, open-drain microprocessor reset circuit with internal pull-up resistor, designed to monitor 2.5 V supply rails. It features a 2.55 V (typical) reset threshold, 150 ms reset timeout, 9–16 µA supply current, and operates across −40°C to +105°C. It ensures safe system initialization in embedded controllers and industrial microprocessor systems.

For engineers reviewing the ADM1815-20AKSZ-RL datasheet, ADM1815-20AKSZ-RL pinout, ADM1815-20AKSZ-RL application, or ADM1815-20AKSZ-RL equivalent, key selection criteria include trip point accuracy (±2.5% over temperature), SC70-3 package compatibility, push-button reset support, and guaranteed reset assertion during power-up/down transitions.

Technical Context

The ADM1815-20AKSZ-RL implements a precision voltage comparator with built-in hysteresis and a fixed 150 ms reset delay timer. Its internal pull-up resistor (5.5 kΩ typical) eliminates external components for active-low reset signaling to microcontrollers with open-drain-compatible inputs.

This variant belongs to the ADM1815 series-active-low, open-drain output versions optimized for 2.5 V, 2.88 V, 3.06 V, 2.31 V, and 2.18 V supply monitoring. It shares functional block architecture with ADM1816/ADM1818 but differs in output polarity and trip point selection.

Key Specifications

Pinout & Package

ADM1815-20AKSZ-RL is housed in a 3-lead SC70 (KS-3) package with gull-wing leads. 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 ADM1815-20ARTZ-RL7 and TPS3808G12DBVR, the ADM1815-20AKSZ-RL delivers optimal integration for space-constrained 2.5 V systems-combining SC70 size, internal pull-up, fixed 150 ms delay, and industrial temperature range in a single chip without external passives.

Availability

ADM1815-20AKSZ-RL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical handheld diagnostics, and smart energy meters requiring stable component supply and long-term manufacturability.

Supply support for ADM1815-20AKSZ-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 ADM181x product line was engineered specifically for cost-sensitive, space-constrained microprocessor reset applications in industrial, automotive, and instrumentation markets-emphasizing simplicity, reliability, and guaranteed timing behavior without external components.

FAQ

What is the exact reset threshold voltage of the ADM1815-20AKSZ-RL?

The ADM1815-20AKSZ-RL has a nominal reset threshold of 2.55 V (typical), 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 "VCC TRIP POINT" for the ADM1815-20 variant.

Does the ADM1815-20AKSZ-RL support manual reset via push-button?

Yes, the ADM1815-20AKSZ-RL supports manual reset: connecting a push-button between RST and GND pulls the output low, and upon release, the device asserts reset for 150 ms (typical). This functionality is explicitly confirmed for ADM1815 in the "ADM1813 AND ADM1818" section and applies identically to all ADM1815 variants including ADM1815-20AKSZ-RL.

What package type and dimensions does the ADM1815-20AKSZ-RL use?

The ADM1815-20AKSZ-RL uses the SC70-3 (KS-3) package: 2.00 mm × 1.25 mm × 0.90 mm body size with 0.65 mm lead pitch. Dimensions are fully compliant with EIAJ SC70 standards and documented in Figure 16 (Page 8) of the Rev. F datasheet.

Is the ADM1815-20AKSZ-RL RoHS compliant?

Yes, the "Z" suffix in ADM1815-20AKSZ-RL indicates RoHS compliance per Analog Devices' ordering guide footnote: "Z = RoHS Compliant Part." The device meets EU Directive 2011/65/EU and is lead-free with NiPdAu lead finish.

What is the maximum supply voltage the ADM1815-20AKSZ-RL can monitor?

The ADM1815-20AKSZ-RL monitors supply voltages from 1.2 V to 5.5 V, with guaranteed reset assertion down to VCC = 1.2 V. Its 2.55 V trip point targets 2.5 V rails, but the device remains functional and provides valid reset signaling across the full 1.2–5.5 V range per Table 1 "SUPPLY Voltage" specifications.