Analog Devices Inc. ADM13307-25ARZ

Overview

ADM13307-25ARZ from Analog Devices is a triple voltage supervisor IC designed to monitor three independent supply rails-specifically 3.3 V, 2.5 V, and an adjustable 1.25 V threshold-in microprocessor and DSP systems. It features push-pull active-high and active-low RESET outputs, 140 ms minimum reset timeout, operation from 2.0 V to 5.5 V supply, and −40°C to +85°C temperature range. Used in notebook computers and industrial equipment for reliable power-on and brownout detection.

For engineers reviewing the ADM13307-25ARZ datasheet, ADM13307-25ARZ pinout, ADM13307-25ARZ application, or ADM13307-25ARZ equivalent, key selection criteria include fixed 2.5 V/3.3 V thresholds with one adjustable 1.25 V input, low 40 μA quiescent current, RESET assertion down to VDD ≥ 1.1 V, and SOIC_N package compatibility for space-constrained embedded designs.

Technical Context

The ADM13307-25ARZ implements three independent undervoltage monitoring channels: SENSE1 (3.3 V nominal), SENSE2 (2.5 V nominal), and SENSE3 (adjustable 1.25 V reference). Each channel uses internal hysteresis-20 mV at 2.25 V, 30 mV at 2.93 V, and 40 mV at 4.55 V-to prevent false resets during supply transients.

It integrates a precision oscillator-based reset timer with 140–280 ms delay, manual reset (MR) input with 100 ns minimum pulse width, and dual push-pull RESET outputs that remain valid down to VDD = 1.1 V. The device requires no external components for fixed-threshold monitoring but supports resistor-divider programming on SENSE3 for custom voltage detection.

Key Specifications

Pinout & Package

ADM13307-25ARZ is housed in an 8-lead narrow-body SOIC (SOIC_N, package code R-8), JEDEC MS-012-AA compliant, with 1.27 mm lead pitch and 5.00 mm × 4.00 mm body dimensions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6816TPA+ and TPS3808G33DBVR, the ADM13307-25ARZ uniquely delivers integrated triple-rail supervision with one programmable channel, enabling both fixed and custom voltage detection in a single SOIC-8 package-reducing system complexity and improving reliability over discrete or single-channel alternatives.

Availability

ADM13307-25ARZ is available at Aetrix Electronics and suitable for industrial PLCs, notebook computers, wireless base stations, and portable medical devices requiring stable component supply and long-term manufacturing continuity.

Supply support for ADM13307-25ARZ 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 ADM13307 family was developed to consolidate multi-rail power supervision in space- and power-constrained embedded systems, targeting DSP/microcontroller platforms needing deterministic reset behavior and flexible voltage threshold configuration.

FAQ

What voltage thresholds does the ADM13307-25ARZ monitor by default?

The ADM13307-25ARZ monitors three rails: SENSE1 at 2.93 V (for 3.3 V systems), SENSE2 at 2.25 V (for 2.5 V systems), and SENSE3 referenced to an internal 1.25 V bandgap-enabling user-programmable thresholds via external resistor dividers. All thresholds include guaranteed hysteresis to reject noise-induced false triggers.

Does the ADM13307-25ARZ require external components to operate?

The ADM13307-25ARZ operates with no external components for fixed-threshold monitoring (SENSE1 and SENSE2), but SENSE3 requires two external resistors to set the desired detection voltage. A 0.1 μF VDD decoupling capacitor is mandatory for noise immunity, and an RC network on MR is recommended for push-button debounce.

Can the ADM13307-25ARZ generate reset signals for multiple processors simultaneously?

Yes-the ADM13307-25ARZ provides both active-low RESET and active-high RESET push-pull outputs, each capable of driving multiple CMOS inputs directly. Its 3 mA sink/source capability allows fan-out to several processors or logic blocks without buffer amplification.

What is the minimum supply voltage at which ADM13307-25ARZ asserts RESET?

The ADM13307-25ARZ asserts RESET as soon as VDD reaches 1.1 V, and maintains valid output states down to that level. This ensures deterministic reset behavior during slow power ramps or deep brownout conditions-critical for preventing undefined processor states.

How does the manual reset (MR) pin interact with the automatic supervision logic?

The MR pin is asynchronous and overrides automatic supervision: pulling MR low forces immediate RESET assertion regardless of SENSEv input states. Upon release, the device holds RESET active for the full 140–280 ms timeout before deassertion-ensuring consistent reset duration whether triggered manually or by supply fault.