Analog Devices Inc. ADM6306D346ARJZ-R7

Overview

ADM6306D346ARJZ-R7 from Analog Devices is a dual-input programmable supervisory IC for microprocessor system reset management, featuring a factory-trimmed VCC undervoltage threshold of 4.63 V (±2.5% over −40°C to +125°C), adjustable RST IN threshold of 1.23 V, 140 ms minimum reset timeout, active-low open-drain RESET output, and manual reset (MR) input. It operates from 0.9 V to 5.5 V and draws only 5 µA typical supply current.

For engineers reviewing the ADM6306D346ARJZ-R7 datasheet, ADM6306D346ARJZ-R7 pinout, ADM6306D346ARJZ-R7 application, or ADM6306D346ARJZ-R7 equivalent, key selection considerations include VCC threshold accuracy across temperature, MR input glitch rejection (0.1 µs), reset timeout stability (±40% over full temp range), and compatibility with bidirectional microprocessor reset pins via open-drain configuration.

Technical Context

The ADM6306D346ARJZ-R7 integrates two independent voltage monitoring paths: one internal precision bandgap-based comparator for VCC (nominal 4.63 V, trimmed per Table 6), and one external resistor-programmable comparator on RST IN with fixed 1.23 V threshold. Both paths feed a shared reset generator with temperature-stable 140 ms timeout (min) and power-glitch immunity.

Its MR input includes an internal 63.5 kΩ pull-up, integrated debounce logic, and noise rejection for transients ≤0.1 µs; RESET remains valid down to VCC = 0.9 V, and the device guarantees operation across −40°C to +125°C in a 5-lead SOT-23 package.

Key Specifications

Pinout & Package

ADM6306D346ARJZ-R7 is housed in a RoHS-compliant 5-lead SOT-23 (RJ-5) package, 2.90 mm × 1.60 mm × 1.15 mm, with JEDEC MO-178-AA compliance and C2 pin 1 orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326US46D3+T and TPS3808G33DBVR, ADM6306D346ARJZ-R7 uniquely combines factory-trimmed 4.63 V VCC supervision, 1.23 V programmable auxiliary monitoring, manual reset with on-chip debounce, and ultra-low 5 µA supply current-all in a 5-pin SOT-23 footprint.

Availability

ADM6306D346ARJZ-R7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical monitors, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for ADM6306D346ARJZ-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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers and manufacturing worldwide.

The ADM6306 series belongs to Analog Devices' Multi-Voltage Monitor product line, engineered specifically for robust, low-power reset supervision in automotive, industrial, and portable systems demanding wide temperature operation and high threshold accuracy.

FAQ

What is the exact VCC undervoltage threshold voltage for ADM6306D346ARJZ-R7?

The ADM6306D346ARJZ-R7 has a factory-trimmed VCC threshold of 4.63 V, with tolerance of ±2.5% over the full operating temperature range (−40°C to +125°C), as specified in Table 6 of the Rev. C datasheet. This value is laser-trimmed during production and does not require external calibration. The ADM6306D346ARJZ-R7 uses Reset Threshold Number 47, corresponding to nominal 4.63 V.

Does ADM6306D346ARJZ-R7 support monitoring of a second voltage rail besides VCC?

Yes, ADM6306D346ARJZ-R7 supports auxiliary rail monitoring via its RST IN pin, which features a fixed 1.23 V threshold. By connecting an external resistor divider between the target rail and RST IN, users can scale higher voltages (e.g., 12 V, 24 V) down to the 1.23 V trip point. The high-impedance input (±25 nA leakage) ensures minimal loading and accurate scaling without significant error.

What is the reset timeout duration for ADM6306D346ARJZ-R7, and how is it selected?

The ADM6306D346ARJZ-R7 implements a 140 ms minimum reset timeout period, indicated by the "D3" suffix in its ordering code. This timeout is factory-programmed and non-adjustable. After all monitored voltages rise above their thresholds, the RESET output remains asserted for ≥140 ms before deasserting, ensuring sufficient hold time for microprocessor initialization sequences.

Can ADM6306D346ARJZ-R7 operate with VCC below 2.5 V?

Yes, ADM6306D346ARJZ-R7 guarantees valid RESET output operation down to VCC = 0.9 V, though its internal VCC monitoring function requires VCC ≥ (VTH + 2.5%) = 4.75 V (for VTH = 4.63 V) to assert reset on VCC undervoltage. Below that level, the device remains powered but cannot detect VCC faults; however, RST IN monitoring and MR functionality remain fully operational as long as VCC > 0.9 V.

Is the manual reset (MR) input of ADM6306D346ARJZ-R7 compatible with standard push-button switches?

Yes, the MR input of ADM6306D346ARJZ-R7 includes an internal 63.5 kΩ pull-up resistor and on-chip debounce logic, allowing direct connection of a momentary push-button switch between MR and GND. No external components are required. The MR pin rejects transients ≤0.1 µs and asserts RESET within 500 ns of a valid low-going edge, making it suitable for field-service or emergency reset applications.