Analog Devices Inc. ADM1812-10AKSZ-RL7

Overview

ADM1812-10AKSZ-RL7 from Analog Devices is a microprocessor reset circuit with active high push-pull output, 4.35 V typical reset threshold, 150 ms reset timeout, −40°C to +105°C operating range, and SC70-3 package. It monitors 5 V power supplies in embedded controllers and ensures safe system initialization after power-up.

For engineers reviewing the ADM1812-10AKSZ-RL7 datasheet, ADM1812-10AKSZ-RL7 pinout, ADM1812-10AKSZ-RL7 application, or ADM1812-10AKSZ-RL7 equivalent, this page provides verified technical context, pin-level design meaning, real-world use scenarios, and validated alternative options for industrial-grade reset supervision.

Technical Context

The ADM1812-10AKSZ-RL7 integrates a precision voltage reference, comparator, and 150 ms delay timer to generate a clean active-high reset pulse when VCC rises above 4.35 V (typ). Its push-pull output drives microprocessor reset inputs directly without external pull-ups.

It operates across the full industrial temperature range (−40°C to +105°C) with supply current as low as 4 µA at 3.6 V, and features guaranteed reset assertion during brownout conditions down to 1.2 V supply.

Key Specifications

Pinout & Package

ADM1812-10AKSZ-RL7 uses the 3-lead SC70 (KS-3) package - compact, surface-mount, JEDEC-compliant, with 0.65 mm lead pitch and coplanarity ≤0.10 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage monitor with active high reset applications.

Compared with MAX809SEUR+T and TPS3808G12DBVR, ADM1812-10AKSZ-RL7 offers fixed 4.35 V detection optimized for marginal 5 V rails, factory-trimmed 150 ms timing, and smallest SC70 footprint-making it ideal for space-constrained industrial controllers where predictability and minimal component count are critical.

Availability

ADM1812-10AKSZ-RL7 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical diagnostic instruments, and smart energy meters requiring stable component supply and long-term lifecycle support.

Supply support for ADM1812-10AKSZ-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.

The ADM181x series was designed specifically for robust, low-cost microprocessor reset supervision in space- and power-constrained embedded systems, emphasizing accuracy, temperature stability, and ease of integration.

FAQ

What is the exact reset threshold voltage for ADM1812-10AKSZ-RL7?

The ADM1812-10AKSZ-RL7 has a typical reset threshold of 4.35 V, with guaranteed minimum of 4.25 V and maximum of 4.49 V across −40°C to +105°C. This value is factory-trimmed and specified in Table 1 of the Rev. F datasheet under "ADM1810-10, ADM1811-10, ADM1812-10, ADM1813-10" row. The "-10" suffix denotes the 4.35 V variant.

Does ADM1812-10AKSZ-RL7 require an external pull-up resistor on the RST pin?

No, ADM1812-10AKSZ-RL7 does not require an external pull-up resistor. It features an active high push-pull output stage that drives RST high during normal operation and pulls it low during reset assertion. This eliminates external components and simplifies interface to microcontrollers with active-low reset inputs requiring inversion logic.

Can ADM1812-10AKSZ-RL7 operate reliably at 3.3 V supply voltage?

Yes, ADM1812-10AKSZ-RL7 operates down to 1.2 V supply, so it functions correctly at 3.3 V. However, its 4.35 V reset threshold means it will assert reset whenever the monitored 5 V rail falls below that level - not the device's own VCC. The part monitors an external 5 V supply while being powered from that same rail (VCC = monitored rail).

What is the package type and dimensions of ADM1812-10AKSZ-RL7?

ADM1812-10AKSZ-RL7 uses the SC70-3 (KS-3) package: 2.00 mm × 1.25 mm body size, 0.65 mm lead pitch, and 0.95 mm max height. Pin 1 is marked by a dot; pinout is VCC (Pin 2), GND (Pin 3), RST (Pin 1), per Figure 3 and Table 3 in the Rev. F datasheet.

How does ADM1812-10AKSZ-RL7 behave during power-down and power-up sequences?

During power-down, ADM1812-10AKSZ-RL7 asserts reset (RST low) when VCC falls below 4.35 V and maintains it until VCC drops below ~1.2 V. During power-up, it holds RST low for 150 ms after VCC rises above 4.35 V, ensuring stable supply before releasing reset - as shown in Figure 10 (Power-Up Timing Diagram) of the datasheet.