Analog Devices Inc. ADM6306D331ARJZ-R7

Overview

ADM6306D331ARJZ-R7 from Analog Devices is a dual-supply supervisory IC with factory-trimmed VCC reset threshold of 3.08 V (±2.5% over −40°C to +125°C), adjustable RST IN input threshold of 1.23 V, 140 ms minimum reset timeout, active-low open-drain RESET output, and manual reset (MR) input - used for reliable power-on and brownout reset in microprocessor systems.

For engineers reviewing the ADM6306D331ARJZ-R7 datasheet, ADM6306D331ARJZ-R7 pinout, ADM6306D331ARJZ-R7 application, or ADM6306D331ARJZ-R7 equivalent, key selection criteria include VCC threshold accuracy, MR input timing, reset timeout stability across temperature, and SOT-23 footprint compatibility in multivoltage embedded designs.

Technical Context

The ADM6306D331ARJZ-R7 integrates a precision internal voltage divider for VCC monitoring at 3.08 V nominal, paired with a high-impedance (±25 nA) 1.23 V adjustable comparator on RST IN for external rail supervision. Its glitch-rejecting MR input features 63.5 kΩ internal pull-up and 1.5 µs minimum pulse width requirement.

Reset assertion remains valid down to VCC = 0.9 V; after all monitored rails exceed thresholds, the open-drain RESET output stays low for 140–280 ms (min–max over temperature) before deassertion. The device operates continuously across −40°C to +125°C with 5 µA typical supply current.

Key Specifications

Pinout & Package

5-lead SOT-23 package (JEDEC MO-178-AA compliant), 2.90 mm × 1.60 mm × 1.15 mm body, gull-wing leads, RoHS-compliant (Pb-free).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326UT31D3+ and TPS3808G33DBVR, the ADM6306D331ARJZ-R7 uniquely combines factory-trimmed 3.08 V VCC monitoring, 1.23 V adjustable input for secondary rail supervision, and integrated manual reset - enabling single-chip dual-voltage supervision with field-service capability in space-constrained designs.

Availability

ADM6306D331ARJZ-R7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLCs, medical infusion pumps, and wireless sensor nodes requiring stable component supply across extended temperature ranges.

Supply support for ADM6306D331ARJZ-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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.

The ADM6306 series belongs to Analog Devices' multi-voltage supervisory IC product line, engineered for deterministic power sequencing and fault detection in safety-critical embedded systems operating across −40°C to +125°C.

FAQ

What is the exact VCC reset threshold voltage for ADM6306D331ARJZ-R7?

The ADM6306D331ARJZ-R7 has a factory-trimmed VCC reset threshold of 3.08 V, with guaranteed tolerance of ±2.5% over the full −40°C to +125°C operating temperature range. This value is confirmed in Table 6 of the Rev. C datasheet under Reset Threshold Number 31, and applies specifically to the ADM6306D331ARJZ-R7 variant.

Does ADM6306D331ARJZ-R7 support monitoring of a second voltage rail beyond VCC?

Yes, ADM6306D331ARJZ-R7 supports secondary rail monitoring via its RST IN pin, which has a fixed 1.23 V threshold. By connecting an external resistor divider between the target rail and ground, users can program supervision of voltages such as 5 V, 12 V, or 24 V - enabling dual-rail supervision with a single ADM6306D331ARJZ-R7 device.

What is the minimum pulse width required on the MR input of ADM6306D331ARJZ-R7?

The MR input of ADM6306D331ARJZ-R7 requires a minimum low pulse width of 1.5 µs over the full −40°C to +125°C temperature range. This specification is documented in the "MR Minimum Input Pulse Width" row of Table 1 in the Rev. C datasheet and ensures reliable manual reset assertion across automotive and industrial operating conditions.

Can ADM6306D331ARJZ-R7 operate with VCC below 2.5 V?

Yes, ADM6306D331ARJZ-R7 guarantees valid RESET output operation down to VCC = 0.9 V, and remains functional across VCC = 0.9 V to 5.5 V. However, the VCC monitoring function is only active when VCC exceeds the 3.08 V threshold plus hysteresis - meaning the device will assert reset during brownout events even at sub-2.5 V supply levels.

Is the RESET output of ADM6306D331ARJZ-R7 compatible with 1.8 V microcontrollers?

Yes, the open-drain RESET output of ADM6306D331ARJZ-R7 is compatible with 1.8 V microcontrollers. When sinking 25 µA, VOL is guaranteed ≤0.3 V with VCC ≥ 0.9 V - well within the VIH/VIL thresholds of standard 1.8 V logic. An external pull-up to the MCU's 1.8 V supply completes the interface without level-shifting circuitry.