Analog Devices Inc. ADM6320CY31ARJZ-R7

Overview

ADM6320CY31ARJZ-R7 from Analog Devices is a supervisory IC with watchdog timer and manual reset, designed for microprocessor power supply monitoring. It features a 3.08 V reset threshold (±2.5% over −40°C to +85°C), 140 ms minimum reset timeout, 1.6 s typical watchdog timeout, open-drain active-low RESET output, and consumes ≤12 µA at 3.6 V. It operates in industrial systems requiring reliable brownout detection and code execution integrity.

For engineers reviewing the ADM6320CY31ARJZ-R7 datasheet, ADM6320CY31ARJZ-R7 pinout, ADM6320CY31ARJZ-R7 application, or ADM6320CY31ARJZ-R7 equivalent, this page delivers verified specifications, validated pin functions, confirmed SOT-23-5 package mapping, and two rigorously cross-referenced alternative parts - all aligned to Rev. K datasheet and Analog Devices' official ordering guide.

Technical Context

The ADM6320CY31ARJZ-R7 implements a precision voltage monitor with hysteresis (3 mV) and temperature coefficient of 40 ppm/°C, ensuring stable reset assertion across industrial temperatures. Its watchdog circuit clears on any WDI logic transition (min. 50 ns pulse width) and times out after 1.6 s if unrefreshed, directly detecting firmware hangs.

This variant integrates manual reset (MR) with 52 kΩ internal pull-up and 1 µs minimum pulse width, and guarantees valid RESET output down to VCC = 1 V. The open-drain RESET output requires an external pull-up and supports logic-level compatibility with microcontrollers operating at up to 6 V.

Key Specifications

Pinout & Package

ADM6320CY31ARJZ-R7 is housed in a 5-lead SOT-23 (RJ-5) package, measuring 2.9 mm × 1.6 mm × 1.1 mm, with gull-wing leads and RoHS-compliant finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADM6320CY31ARJZ-R7, the CY29 variant offers lower threshold for tighter 3.0 V system control, while the CZ29 variant trades faster fault detection for robustness against slow-start firmware - both retain identical SOT-23-5 footprint and open-drain RESET interface.

Availability

ADM6320CY31ARJZ-R7 is available at Aetrix Electronics and suitable for industrial PLC controllers, medical handheld diagnostics, smart energy meters, ruggedized telematics gateways, and battery-backed IoT edge nodes requiring stable component supply and long-term lifecycle support.

Supply support for ADM6320CY31ARJZ-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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.

ADM6320CY31ARJZ-R7 belongs to the ADM63xx family of supervisory circuits, engineered specifically for robust microprocessor reset management in harsh industrial and portable environments with emphasis on low power, glitch immunity, and configurability.

FAQ

What is the exact reset voltage threshold of ADM6320CY31ARJZ-R7 and how does it vary with temperature?

The ADM6320CY31ARJZ-R7 has a nominal reset threshold of 3.08 V at 25°C, with tolerance of ±2.5% over the full industrial temperature range (−40°C to +85°C). Its temperature coefficient is 40 ppm/°C, resulting in maximum deviation of ~12 mV across the range - confirmed in Table 5 and Figure 8 of Rev. K datasheet. This ensures predictable brownout behavior in thermal cycling environments.

Does ADM6320CY31ARJZ-R7 support manual reset, and what are its electrical requirements?

Yes, ADM6320CY31ARJZ-R7 includes a dedicated MR pin (Pin 3) with active-low functionality, 52 kΩ internal pull-up, and 1 µs minimum pulse width requirement. It accepts logic thresholds of 0.3×VCC to 0.7×VCC when VTH < 4.0 V, and 0.8 V to 2.0 V otherwise - matching the 3.08 V threshold. Glitch rejection is rated at 100 ns, per Table 4 and Section "Manual Reset Input".

What watchdog timeout options are available for ADM6320CY31ARJZ-R7, and how is it configured?

ADM6320CY31ARJZ-R7 is configured for 1.6 s typical watchdog timeout (suffix 'Y'), as indicated by the 'Y' in its ordering code. The watchdog is enabled by driving WDI (Pin 4) with periodic transitions; it times out if no edge occurs within 1.6 s. Leaving WDI floating disables the watchdog - no external components or configuration registers are needed.

What is the RESET output structure of ADM6320CY31ARJZ-R7, and what external components are required?

ADM6320CY31ARJZ-R7 features an open-drain active-low RESET output (Pin 1), requiring an external pull-up resistor to a logic-compatible voltage (≤6 V). A 10 kΩ resistor is recommended for most applications, per Section "Open-Drain RESET Output". The output sinks ≥1.2 mA at VCC ≥ 2.7 V and guarantees logic-low state down to VCC = 1 V.

Is ADM6320CY31ARJZ-R7 pin-compatible with other ADM6320 variants, and what package does it use?

Yes, ADM6320CY31ARJZ-R7 uses the standard 5-lead SOT-23 (RJ-5) package and shares identical pinout with all ADM6320 variants - Pin 1 (RESET), Pin 2 (GND), Pin 3 (MR), Pin 4 (WDI), Pin 5 (VCC) - as shown in Figure 3 and Table 4 of Rev. K datasheet. All ADM6320 parts are mechanically and electrically interchangeable at the board level.