Analog Devices Inc. ADM6326-29ARTZ-R7

Overview

ADM6326-29ARTZ-R7 from Analog Devices is an ultralow-power microprocessor reset circuit in a 3-lead SOT-23 package, providing active-low push-pull RESET output with 2.93 V threshold voltage (±2.5% over −40°C to +85°C), 100 ms minimum reset timeout, and 1 µA max supply current at 3 V. It monitors VCC rails during power-up, power-down, and brownout conditions in portable microprocessor systems.

For engineers reviewing the ADM6326-29ARTZ-R7 datasheet, ADM6326-29ARTZ-R7 pinout, ADM6326-29ARTZ-R7 application, or ADM6326-29ARTZ-R7 equivalent, this device supports reliable system initialization in low-power embedded designs where supply rail stability, glitch immunity, and extended temperature operation are critical selection criteria.

Technical Context

The ADM6326-29ARTZ-R7 integrates a precision voltage reference, comparator with hysteresis (6.3 mV), and internal 100–280 ms reset timeout timer. Its push-pull output drives logic-level RESET directly without external pull-up, supporting VCC as low as 1 V while maintaining valid output state.

Designed for immunity to fast negative-going VCC transients, it guarantees reset assertion within 20 µs when VCC falls below 2.93 V (−2.5%), and holds RESET asserted for ≥100 ms after VCC rises above threshold-ensuring stable microprocessor startup before instruction execution begins.

Key Specifications

Pinout & Package

ADM6326-29ARTZ-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 MAX6326TRD29+T and TPS3808G33DBVR, ADM6326-29ARTZ-R7 delivers optimal balance of ultra-low ICC, precise 2.93 V threshold, push-pull simplicity, and compact 3-pin footprint-making it ideal for cost- and space-sensitive portable and industrial microprocessor systems.

Availability

ADM6326-29ARTZ-R7 is available at Aetrix Electronics and suitable for telecommunications baseband modules, industrial microcontroller units, and portable medical sensors requiring stable component supply and long-term production continuity.

Supply support for ADM6326-29ARTZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The ADM6326 series belongs to Analog Devices' single-supply voltage supervisor product line, engineered specifically for reliable, low-power reset generation in battery-operated and thermally demanding embedded systems.

FAQ

What is the exact reset threshold voltage of ADM6326-29ARTZ-R7 and how tightly is it specified?

The ADM6326-29ARTZ-R7 has a nominal reset threshold voltage of 2.93 V, with guaranteed tolerance of ±2.5% over the full operating temperature range (−40°C to +85°C). At 25°C, the threshold is 2.93 V ±1.5%, and hysteresis is fixed at 6.3 mV-ensuring clean, chatter-free reset transitions during rail ramp-up or brownout recovery. This specification is verified per Table 2 in the Rev. B datasheet.

Does ADM6326-29ARTZ-R7 require an external pull-up resistor on its RESET pin?

No, ADM6326-29ARTZ-R7 does not require an external pull-up resistor because it features an active-low push-pull RESET output. Unlike open-drain variants (e.g., ADM6328-29ARTZ-R7), the ADM6326-29ARTZ-R7 actively drives both high and low states-enabling direct connection to standard CMOS reset inputs without additional components. This simplifies design and improves noise immunity.

What is the minimum VCC voltage at which ADM6326-29ARTZ-R7 remains functional and asserts RESET?

ADM6326-29ARTZ-R7 remains fully operational and guarantees valid RESET assertion down to VCC = 1.0 V. Its internal circuitry continues monitoring and asserting RESET even during deep brownout conditions, and the output remains logically defined (low when VCC < 2.93 V) across the entire 1.0 V to 5.5 V supply range-critical for fail-safe behavior in battery-depleted or faulted systems.

How long does the RESET signal stay asserted after power-up for ADM6326-29ARTZ-R7?

After VCC rises above the 2.93 V threshold, ADM6326-29ARTZ-R7 holds RESET low for a guaranteed minimum of 100 ms, with typical duration of 185 ms and maximum of 280 ms. This timeout is internally generated and temperature-stable, ensuring sufficient time for power supply stabilization and microprocessor core initialization before release from reset.

Is ADM6326-29ARTZ-R7 RoHS compliant and what is its packaging format?

Yes, ADM6326-29ARTZ-R7 is RoHS compliant (denoted by the "Z" suffix) and supplied in tape-and-reel format (R7 designation). It uses a JEDEC-standard 3-lead SOT-23-3 (RT-3) package with lead-free matte tin finish, compatible with standard surface-mount reflow processes. The marking code "LAX" appears on the top surface for traceability.