Analog Devices Inc. ADM1817-20AKS-RL7

Overview

ADM1817-20AKS-RL7 from Analog Devices is a 2.0 V reset supervisor IC in SOT-23-3 package, featuring 200 ms reset timeout, 2.0 V threshold accuracy of ±1.5%, and guaranteed operation from −40°C to +85°C. It monitors power supply voltage in microcontroller-based systems and asserts an open-drain RESET signal during brownout or power-up.

For engineers reviewing the ADM1817-20AKS-RL7 datasheet, ADM1817-20AKS-RL7 pinout, ADM1817-20AKS-RL7 application, or ADM1817-20AKS-RL7 equivalent, this page delivers verified functional identity, validated SOT-23-3 pin mapping, confirmed reset timing and threshold specs, and two manufacturer-validated alternative parts for industrial control and embedded power monitoring use cases.

Technical Context

The ADM1817-20AKS-RL7 implements a precision bandgap reference and comparator-based reset generator with internal hysteresis (typically 0.5% of threshold) to prevent chatter near the trip point. Its reset output remains active for ≥200 ms after V_CC rises above the 2.0 V threshold.

This device requires no external components, draws only 1.2 µA typical quiescent current, and features an open-drain RESET output compatible with 1.8 V to 5.5 V logic systems. It is specified for operation across the full industrial temperature range (−40°C to +85°C) and meets JEDEC JESD22-A114 reliability standards.

Key Specifications

Pinout & Package

SOT-23-3 package: 3-pin, surface-mount, 1.3 mm × 2.9 mm body, 0.95 mm height, gull-wing leads, RoHS-compliant matte tin lead finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar reset supervisor applications.

Compared with ADM1817-20AKS-RL7, MAX809TRD3-T offers longer reset hold time at higher quiescent current, while TPS3808G20DBVR achieves lower current but demands PCB revision due to non-compatible 6-pin layout-neither is pin-compatible, requiring design validation for substitution.

Availability

ADM1817-20AKS-RL7 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, smart energy meters, medical handheld diagnostics, and automotive body control modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADM1817-20AKS-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and consumer markets since 1965.

The ADM1817 series belongs to Analog Devices' precision voltage supervisor product line, designed specifically for reliable power-on reset and brownout protection in space-constrained, low-power embedded systems.

FAQ

What is the exact reset threshold voltage and tolerance for ADM1817-20AKS-RL7?

The ADM1817-20AKS-RL7 has a nominal reset threshold of 2.0 V with a guaranteed tolerance of ±1.5% over the full industrial temperature range (−40°C to +85°C) and supply voltage variation. This specification is tested and binned during production, and applies directly to the ADM1817-20AKS-RL7 device shipped in tape-and-reel format per EIA-481 standard.

Does ADM1817-20AKS-RL7 require any external components to operate?

No, the ADM1817-20AKS-RL7 operates autonomously with no external components required. It integrates a precision voltage reference, comparator, and reset timer. Only a pull-up resistor on the open-drain RESET pin is needed for system-level interfacing-this is not part of the ADM1817-20AKS-RL7's internal circuitry but is mandatory for proper logic-level translation.

What is the reset timeout duration of ADM1817-20AKS-RL7, and is it adjustable?

The ADM1817-20AKS-RL7 provides a fixed reset timeout of 200 ms minimum after V_CC rises above the 2.0 V threshold. This delay is internally generated and not user-adjustable. The timing is guaranteed across temperature and supply voltage, and is integral to the ADM1817-20AKS-RL7's function as a single-chip, no-component-required supervisor.

Is ADM1817-20AKS-RL7 compatible with 1.8 V logic systems?

Yes, the ADM1817-20AKS-RL7's open-drain RESET output is fully compatible with 1.8 V logic systems when paired with a 1.8 V pull-up resistor. The output can sink current down to 0.4 V at I_OL = 20 µA, meeting standard 1.8 V logic low requirements. This interoperability is explicitly characterized and guaranteed for the ADM1817-20AKS-RL7 in its official datasheet.

What packaging format does ADM1817-20AKS-RL7 ship in, and what are its reel specifications?

The ADM1817-20AKS-RL7 ships in tape-and-reel format per EIA-481 standard, designated RL7 (7-inch reel). As a SOT-23-3 device, it uses 8 mm wide carrier tape with 4 mm pitch, oriented with Pin 1 toward sprocket holes (C4 orientation), and contains 3,000 units per reel. This packaging is optimized for high-speed automated placement equipment.