Analog Devices Inc. ADM6306D331ARJZ1R7

Overview

ADM6306D331ARJZ1R7 from Analog Devices is a dual-supply supervisory IC with one factory-trimmed VCC reset threshold (3.08 V) and one adjustable RST IN input (1.23 V), active-low open-drain RESET output, 140 ms timeout, manual reset (MR) input, and 5 µA typical supply current. It monitors microprocessor power rails in battery-powered systems requiring reliable undervoltage detection and system-level reset control.

For engineers reviewing the ADM6306D331ARJZ1R7 datasheet, ADM6306D331ARJZ1R7 pinout, ADM6306D331ARJZ1R7 application, or ADM6306D331ARJZ1R7 equivalent, key selection criteria include VCC threshold accuracy (±2.5% over −40°C to +125°C), MR input timing (1.5 µs minimum pulse width), reset output sink capability (3.2 mA at VCC > 4.25 V), and SOT-23-5 package compatibility with space-constrained PCB layouts.

Technical Context

The ADM6306D331ARJZ1R7 integrates an internal precision voltage divider for fixed VCC monitoring at 3.08 V nominal (±2.5% over full temperature range) and a high-impedance 1.23 V comparator input (RST IN) for external rail supervision via resistor divider. Its glitch-rejecting MR input includes on-chip debounce and a 63.5 kΩ internal pull-up.

Reset assertion occurs when either VCC falls below 3.08 V or RST IN drops below 1.23 V; deassertion requires both inputs to exceed thresholds plus a guaranteed 140–280 ms timeout. The open-drain RESET remains valid down to VCC = 0.9 V, enabling operation during brownout conditions.

Key Specifications

Pinout & Package

5-lead SOT-23 package (RJ-5), JEDEC MO-178-AA compliant, footprint dimensions 2.90 × 1.60 × 1.30 mm, thermal resistance θ_JA = 240°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326T31D2+T and TPS3808G33DBVR, the ADM6306D331ARJZ1R7 uniquely combines factory-trimmed 3.08 V VCC supervision, 1.23 V adjustable input, manual reset with integrated debounce, and 5 µA current-making it optimal for dual-rail, battery-critical, and field-serviceable designs.

Availability

ADM6306D331ARJZ1R7 is available at Aetrix Electronics and suitable for portable electronics, microprocessor systems, and multivoltage industrial equipment requiring stable component supply across extended temperature ranges.

Supply support for ADM6306D331ARJZ1R7 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.

The ADM6306D331ARJZ1R7 belongs to Analog Devices' Multi-Voltage Monitor product line, engineered for reliable power sequencing and system-level reset generation in resource-constrained embedded systems.

FAQ

What is the exact VCC reset threshold voltage for ADM6306D331ARJZ1R7?

The ADM6306D331ARJZ1R7 has a factory-trimmed VCC reset threshold of 3.08 V, specified with ±2.5% tolerance 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 exclusively to the ADM6306D331ARJZ1R7 variant. The 3.08 V threshold enables precise supervision of standard 3.3 V power rails while accommodating manufacturing variation and thermal drift.

Does ADM6306D331ARJZ1R7 support monitoring a second voltage rail beyond VCC?

Yes, ADM6306D331ARJZ1R7 supports secondary rail monitoring via its RST IN pin, which features a fixed 1.23 V comparator threshold. By connecting an external resistor divider from the target rail to RST IN, users can supervise any voltage ≥1.23 V-including 1.8 V, 2.5 V, or 5 V supplies-without additional components. The high-impedance input (±25 nA leakage) ensures minimal loading, and the datasheet confirms this functionality applies specifically to the ADM6306D331ARJZ1R7 model per Table 9 and Ordering Code Structure Figure 17.

What is the minimum pulse width required on the MR input of ADM6306D331ARJZ1R7 to trigger reset?

The ADM6306D331ARJZ1R7 requires a minimum MR input pulse width of 1.5 µs over the full −40°C to +125°C temperature range, as specified in Table 1 under "MR Minimum Input Pulse Width." This timing ensures reliable assertion of the RESET output even under worst-case thermal conditions. The MR pin includes on-chip glitch rejection (0.1 µs typical) and an internal 63.5 kΩ pull-up resistor, allowing direct connection to a push-button switch without external components.

Can ADM6306D331ARJZ1R7 operate with VCC below 2.5 V?

Yes, ADM6306D331ARJZ1R7 guarantees valid RESET output operation down to VCC = 0.9 V, as stated in Table 1 under "OPERATING VOLTAGE RANGE, VCC" and confirmed in the General Description. However, the VCC threshold monitoring function is only active when VCC exceeds (VTH + 2.5%) ≈ 3.16 V (since VTH = 3.08 V). Below that level, the device remains powered but does not assert reset based on VCC; it continues to respond to RST IN and MR inputs as long as VCC ≥ 0.9 V.

What package type and marking code does ADM6306D331ARJZ1R7 use?

The ADM6306D331ARJZ1R7 uses a 5-lead SOT-23 package (JEDEC MO-178-AA, package option RJ-5) with RoHS-compliant finish (Z suffix). Its top-side marking code is "LG6", as listed in the Ordering Guide on page 11 of the Rev. C datasheet. The "RJZ" in the part number explicitly denotes SOT-23 packaging and RoHS compliance, while "R7" indicates 7-inch tape-and-reel packaging with 3,000 units per reel.