Analog Devices Inc. ADM1813-5AKS-RL7

Overview

ADM1813-5AKS-RL7 from Analog Devices is a 3-pin SC70-packaged microprocessor reset circuit with open-drain output and internal 5.5 kΩ pull-up resistor, designed to monitor 5 V supplies at a typical 4.62 V trip threshold. It delivers 150 ms reset timeout after power-up, supports manual push-button reset with 1 µs detection latency, and operates across −40°C to +105°C for industrial embedded systems.

For engineers reviewing the ADM1813-5AKS-RL7 datasheet, ADM1813-5AKS-RL7 pinout, ADM1813-5AKS-RL7 application, or ADM1813-5AKS-RL7 equivalent, key selection criteria include its open-drain with integrated pull-up architecture, push-button reset capability, 4.62 V threshold tolerance (±0.13 V), 150 ms reset timeout, and SC70 package compatibility with space-constrained PCB layouts.

Technical Context

The ADM1813-5AKS-RL7 implements a precision voltage comparator with built-in hysteresis and a fixed 150 ms reset delay timer. Its internal reference ensures stable trip point accuracy over temperature, while the open-drain RST output with 5.5 kΩ internal pull-up enables direct interface to microcontroller reset inputs requiring active-low assertion.

This device belongs to the ADM181x family optimized for safe system initialization: it holds reset asserted until VCC rises above 4.62 V and remains asserted for ≥100 ms (typical 150 ms) after crossing threshold, preventing premature CPU boot during supply ramp-up. Push-button functionality adds field-serviceable reset without external components.

Key Specifications

Pinout & Package

ADM1813-5AKS-RL7 is housed in a 3-lead SC70 (KS-3) package - 2.00 mm × 2.10 mm × 0.90 mm body, 0.65 mm lead pitch - optimized for high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADM1811-5AKS-RL7, the ADM1813-5AKS-RL7 adds push-button reset without increasing footprint or cost; versus MAX809SEUR+T, it eliminates external pull-up dependency and improves noise immunity on shared reset nets through integrated termination.

Availability

ADM1813-5AKS-RL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical handheld diagnostics, and network edge routers requiring stable component supply with full −40°C to +105°C qualification and RoHS-compliant packaging.

Supply support for ADM1813-5AKS-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, headquartered in Norwood, MA.

The ADM181x product line delivers cost-optimized, space-efficient microprocessor reset supervisors targeting industrial, automotive, and medical systems where reliable power-on sequencing and fault recovery are critical.

FAQ

What is the exact reset threshold voltage for ADM1813-5AKS-RL7?

The ADM1813-5AKS-RL7 has a nominal reset threshold of 4.62 V, with guaranteed limits of 4.50 V (minimum) and 4.75 V (maximum) across −40°C to +105°C. This value is specified for the "-5" variant in the ADM1813 family and is optimized for monitoring standard 5 V power rails.

Does ADM1813-5AKS-RL7 require an external pull-up resistor on the RST pin?

No. The ADM1813-5AKS-RL7 integrates a 5.5 kΩ internal pull-up resistor on the RST pin, enabling direct connection to microcontroller reset inputs without external components. This simplifies design, saves board space, and ensures consistent pull-up strength across operating conditions.

Can ADM1813-5AKS-RL7 be used with a manual push-button reset switch?

Yes. The ADM1813-5AKS-RL7 explicitly supports push-button reset: connecting a switch between RST and GND pulls the output low, and upon release, the device holds RST low for a guaranteed 100–250 ms (typical 150 ms), providing reliable manual system recovery.

What package type and dimensions does ADM1813-5AKS-RL7 use?

The ADM1813-5AKS-RL7 uses the 3-lead SC70 (KS-3) package: 2.00 mm × 2.10 mm body size, 0.90 mm maximum height, and 0.65 mm lead pitch. It is RoHS-compliant (indicated by "Z" suffix in ordering code) and compatible with standard reflow soldering profiles.

How does ADM1813-5AKS-RL7 handle power-up sequencing in multi-rail systems?

The ADM1813-5AKS-RL7 monitors only a single supply (VCC). In multi-rail systems, it is typically assigned to supervise the core 5 V domain that powers the microcontroller and critical peripherals. Its 150 ms reset timeout ensures the 5 V rail stabilizes before releasing reset, allowing other rails time to settle independently.