Analog Devices Inc. ADM1232ARWZ

Overview

ADM1232ARWZ from Analog Devices is a 5 V microprocessor supervisory circuit in a 16-lead SOIC_W (RW-16) package, featuring adjustable voltage monitoring (4.5 V or 4.75 V trip), programmable strobe timeout (150 ms / 600 ms / 1.2 s), push-button reset with 20 ms debounce, open-drain RESET and active-high RESET outputs, and operation across −40°C to +85°C - used for reliable power-on reset and watchdog supervision in embedded control systems.

For engineers reviewing the ADM1232ARWZ datasheet, ADM1232ARWZ pinout, ADM1232ARWZ application, or ADM1232ARWZ equivalent, key selection criteria include VCC trip tolerance selection (5% vs. 10%), STROBE timeout configuration via TD pin, dual-reset output topology (push-pull RESET + open-drain RESET), thermal resistance (θJA = 73°C/W), and compatibility with MAX1232/DS1232 designs.

Technical Context

The ADM1232ARWZ integrates three core supervision functions: precision supply voltage monitoring with selectable 5% or 10% tolerance thresholds, a configurable watchdog timer triggered by STROBE edge transitions, and a debounced manual reset input (PB RESET). Its dual-reset architecture supports both active-high logic-level assertion and open-drain pull-down signaling for flexible system-level reset coordination.

It uses internal bandgap references and RC-based timing for VCC detection and strobe timeout generation - no external components required. The TD pin selects one of three timeout ranges (62.5–250 ms, 250–1000 ms, or 500–2000 ms) by connecting to GND, floating, or VCC, enabling adaptation to varying processor activity cycles without layout changes.

Key Specifications

Pinout & Package

ADM1232ARWZ is housed in a 16-lead SOIC_W (RW-16) package per JEDEC MS-013-AA, with 0.050" (1.27 mm) lead pitch, 7.4–7.6 mm body width, and θJA = 73°C/W. Pin 1 is top-left corner, marked by notch or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1232CPD+ and DS1232LPN+, the ADM1232ARWZ provides superior thermal performance (73°C/W), full −40°C to +85°C qualification, and the widest strobe timeout range - making it optimal for thermally constrained or safety-critical deployments.

Availability

ADM1232ARWZ is available at Aetrix Electronics and suitable for automotive ECU, industrial PLC, medical instrumentation, and point-of-sale terminal designs requiring stable component supply, RoHS-compliant packaging, and long-term industrial temperature support.

Supply support for ADM1232ARWZ 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control systems.

The ADM1232 belongs to Analog Devices' microprocessor supervisory product line, engineered to ensure deterministic power-on reset, supply voltage integrity, and software hang detection in mission-critical embedded systems.

FAQ

What is the function of the TD pin on the ADM1232ARWZ?

The TD pin on the ADM1232ARWZ selects the strobe timeout period: connecting TD to GND yields ~150 ms, leaving it floating yields ~600 ms, and tying it to VCC yields ~1.2 s. This configures the maximum allowable interval between STROBE input edges before the ADM1232ARWZ asserts RESET - enabling adaptation to different microprocessor instruction cycle durations without external components.

Does the ADM1232ARWZ require external components for basic operation?

No, the ADM1232ARWZ requires no external components for core supervision functions. Its internal voltage reference, RC timing network, and debounce circuit eliminate the need for external resistors, capacitors, or diodes - simplifying design and reducing bill-of-materials cost while maintaining full functionality including VCC monitoring, watchdog timeout, and push-button reset.

How does the TOLERANCE pin affect the ADM1232ARWZ reset threshold?

The TOLERANCE pin on the ADM1232ARWZ sets the VCC trip point: grounding it selects a 5% tolerance (4.75 V nominal trip), while connecting it to VCC selects 10% tolerance (4.5 V nominal trip). This allows precise matching of the ADM1232ARWZ's brownout detection to the target microprocessor's minimum operating voltage without redesigning the power supply.

What is the difference between the RESET and RESET outputs of the ADM1232ARWZ?

The RESET output of the ADM1232ARWZ is an active-high push-pull driver capable of sourcing and sinking up to 10 mA, while RESET is an open-drain output that only sinks current and requires an external pull-up resistor. This dual-output architecture lets the ADM1232ARWZ drive a microprocessor reset pin directly (via RESET) and share a common reset bus with other devices (via RESET).

Is the ADM1232ARWZ RoHS compliant and what package does it use?

Yes, the ADM1232ARWZ is RoHS compliant (indicated by the "Z" suffix) and is supplied in a 16-lead SOIC_W (RW-16) package per JEDEC MS-013-AA, with 7.4–7.6 mm body width, 1.27 mm lead pitch, and specified θJA of 73°C/W - optimized for surface-mount reflow assembly and thermal performance in dense PCB layouts.