Analog Devices Inc. ADM6326-22ARTZ-R7

Overview

ADM6326-22ARTZ-R7 from Analog Devices is an ultralow-power microprocessor reset circuit in a 3-lead SOT-23 package, featuring a 2.2 V reset threshold, push-pull active-low RESET output, 1 µA maximum supply current, and 100 ms minimum reset timeout. It monitors VCC during power-up, power-down, and brownout conditions in portable microprocessor systems.

For engineers reviewing the ADM6326-22ARTZ-R7 datasheet, ADM6326-22ARTZ-R7 pinout, ADM6326-22ARTZ-R7 application, or ADM6326-22ARTZ-R7 equivalent, key selection criteria include reset threshold accuracy (±2.5% over temperature), guaranteed operation down to 1 V VCC, glitch immunity against negative-going transients, and compatibility with low-voltage microcontrollers requiring clean, timed reset assertion.

Technical Context

The ADM6326-22ARTZ-R7 integrates a precision voltage reference, comparator with hysteresis (6.3 mV), and a 100–280 ms internal reset timeout timer. Its push-pull output drives directly into microprocessor RESET pins without external pull-up components.

It operates across −40°C to +85°C with supply voltage range 1.0 V to 5.5 V, and maintains valid RESET assertion even as VCC drops to 1 V - enabling robust brownout detection in battery-powered systems where supply collapse is gradual.

Key Specifications

Pinout & Package

ADM6326-22ARTZ-R7 is housed in a JEDEC-compliant 3-lead SOT-23-3 (RT-3) package with 270°C/W junction-to-ambient thermal resistance, optimized for space-constrained PCB layouts and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326TRD22+T and TPS3808G01QDBVRQ1, the ADM6326-22ARTZ-R7 offers the lowest supply current and widest VCC operating range (1.0 V), making it optimal for ultra-low-power portable and industrial edge devices where battery life and brownout resilience are primary constraints.

Availability

ADM6326-22ARTZ-R7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, wireless edge node gateways, and automotive body control modules requiring stable component supply with full RoHS compliance and traceable lot documentation.

Supply support for ADM6326-22ARTZ-R7 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, with design centers and manufacturing facilities worldwide.

The ADM6326 series belongs to Analog Devices' precision voltage supervisor product line, engineered specifically for ultralow-power, high-accuracy reset generation in battery-operated and industrial embedded systems where reliability under voltage stress is critical.

FAQ

What is the exact reset threshold voltage tolerance of the ADM6326-22ARTZ-R7 over temperature?

The ADM6326-22ARTZ-R7 has a reset threshold of 2.2 V with ±2.5% tolerance over the full operating temperature range of −40°C to +85°C, meaning the actual trip point stays within 2.145 V to 2.25 V. At 25°C, the typical value is 2.2 V with ±1.5% tolerance, per Table 2 in the Rev. B datasheet. This tight specification ensures predictable reset behavior across environmental extremes without calibration.

Does the ADM6326-22ARTZ-R7 require an external pull-up resistor on its RESET pin?

No, the ADM6326-22ARTZ-R7 features an active-low push-pull RESET output (Pin 2), which actively drives both high and low states. Unlike open-drain variants such as the ADM6328-22ARTZ-R7, the ADM6326-22ARTZ-R7 does not require an external pull-up resistor - simplifying BOM and reducing PCB footprint while ensuring fast, controlled rise times.

Can the ADM6326-22ARTZ-R7 operate when the monitored VCC drops below 2.2 V?

Yes - the ADM6326-22ARTZ-R7 remains fully functional and continues asserting RESET down to VCC = 1.0 V. Its internal circuitry is designed to maintain valid logic levels and timing integrity even during deep brownout, allowing it to detect and hold reset through the final stages of battery discharge or supply collapse.

What is the minimum reset timeout period specified for the ADM6326-22ARTZ-R7?

The ADM6326-22ARTZ-R7 guarantees a minimum reset timeout period of 100 ms after VCC rises above the 2.2 V threshold. The typical timeout is 185 ms, and the maximum is 280 ms over temperature. This ensures sufficient time for power supply stabilization, oscillator startup, and memory initialization before releasing the microprocessor from reset.

Is the ADM6326-22ARTZ-R7 RoHS compliant and lead-free?

Yes, the "Z" suffix in ADM6326-22ARTZ-R7 explicitly denotes RoHS compliance per EU Directive 2011/65/EU. The device uses lead-free terminations and conforms to Analog Devices' green packaging standards, including exemption 7a (Pb in electric electronic components) where applicable. Full compliance documentation is available via Analog Devices' product page and material declarations.