Analog Devices Inc. ADM6326-24ARTZ-R7

Overview

ADM6326-24ARTZ-R7 from Analog Devices is an ultralow-power microprocessor reset circuit in a 3-lead SOT-23 package, featuring a 2.4 V reset threshold (V_TH = 2.4 V), push-pull active-low RESET output, 1 µA maximum supply current at 3 V, and guaranteed operation down to V_CC = 1 V - used for reliable power-up sequencing in portable microprocessor systems.

For engineers reviewing the ADM6326-24ARTZ-R7 datasheet, ADM6326-24ARTZ-R7 pinout, ADM6326-24ARTZ-R7 application, or ADM6326-24ARTZ-R7 equivalent, key selection criteria include reset threshold accuracy (±2.5% over temperature), 100 ms minimum reset timeout, glitch immunity against negative-going V_CC transients, and compatibility with low-voltage brownout detection in battery-powered embedded designs.

Technical Context

The ADM6326-24ARTZ-R7 integrates a precision voltage reference, comparator, and 100 ms internal reset timer to generate a clean, glitch-immune active-low reset signal during power-up, power-down, and brownout events. Its push-pull output drives directly into microprocessor RESET pins without external pull-up components.

It operates across −40°C to +85°C with ±2.5% reset threshold tolerance over temperature, 40 ppm/°C temperature coefficient, and 6.3 mV hysteresis - ensuring stable monitoring of 2.4 V rails while rejecting fast transients up to 100 V/µs slew rate on V_CC.

Key Specifications

Pinout & Package

ADM6326-24ARTZ-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 MAX6326T24D2T and TPS3124E12DBVR, ADM6326-24ARTZ-R7 uniquely combines 1.0 V operational lower limit, 1 µA supply current, and push-pull output in a standard SOT-23-3 - making it optimal for ultra-low-power, single-rail 2.4 V systems demanding guaranteed reset through deep brownout.

Availability

ADM6326-24ARTZ-R7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, smart meter communication modules, and low-power industrial controllers requiring stable component supply with RoHS-compliant packaging and extended temperature support.

Supply support for ADM6326-24ARTZ-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, serving industrial, automotive, communications, and healthcare markets.

The ADM6326 series belongs to Analog Devices' precision voltage supervisor product line, designed specifically for ultralow-power, accurate reset generation in battery-operated and thermally demanding embedded systems.

FAQ

What is the exact reset threshold voltage of ADM6326-24ARTZ-R7 and its tolerance over temperature?

The ADM6326-24ARTZ-R7 has a nominal reset threshold voltage of 2.4 V, with a guaranteed tolerance of ±2.5% over the full operating temperature range of −40°C to +85°C. At 25°C, the threshold is 2.4 V ±1.5%, and the device exhibits a temperature coefficient of 40 ppm/°C - meaning the actual trip point shifts predictably with ambient temperature, enabling precise brownout detection for 2.4 V rails in varying environmental conditions. This specification is confirmed in Table 2 of the Rev. B datasheet.

Does ADM6326-24ARTZ-R7 support operation below 2.4 V, and down to what supply voltage does RESET remain valid?

Yes, ADM6326-24ARTZ-R7 remains fully functional and asserts RESET down to V_CC = 1.0 V, as specified in the Absolute Maximum Ratings and General Description sections. The reset output stays active (low) as long as V_CC remains below the 2.4 V threshold, and the internal circuitry continues to operate reliably even at 1.0 V - a critical feature for detecting deep brownout conditions where other supervisors may lose functionality. This capability is explicitly documented in the Rev. B datasheet on Page 1 and Page 3.

What is the reset timeout duration of ADM6326-24ARTZ-R7, and how does it vary with temperature?

The ADM6326-24ARTZ-R7 guarantees a minimum reset timeout of 100 ms after V_CC rises above the 2.4 V threshold, with a typical value of 185 ms and a maximum of 280 ms over temperature. Figure 6 in the datasheet shows that the timeout remains stable across −40°C to +85°C, varying within this bounded range - ensuring sufficient time for power supply stabilization and microprocessor initialization regardless of ambient conditions. This fixed internal timer eliminates dependency on external components.

Is ADM6326-24ARTZ-R7 pin-compatible with other devices in the ADM6326/ADM6328 family?

Yes, ADM6326-24ARTZ-R7 shares identical 3-lead SOT-23 (RT-3) pinout and footprint with all ADM6326/ADM6328/ADM6346/ADM6348 variants, including GND on Pin 1, RESET on Pin 2, and V_CC on Pin 3. However, output structure differs: ADM6326-24ARTZ-R7 uses push-pull RESET, whereas ADM6328 variants use open-drain - so direct substitution requires verifying output type compatibility with the target MCU's reset input requirements.

What is the maximum negative-going V_CC transient the ADM6326-24ARTZ-R7 can reject without asserting spurious reset?

The ADM6326-24ARTZ-R7 provides built-in glitch immunity against negative-going V_CC transients, with rejection capability defined by reset threshold overdrive (V_TH – V_CC) versus pulse duration. As shown in Figure 5 of the datasheet, it tolerates transients up to ~100 mV overdrive for durations under 10 µs, and smaller overdrives (e.g., 20 mV) for longer pulses - preventing false resets from switching noise or ESD-induced supply dips while maintaining fast 20 µs response to genuine brownouts.