Analog Devices Inc. ADM6306D344ARJZ-R7

Overview

ADM6306D344ARJZ-R7 from Analog Devices is a dual-input programmable supervisory IC for microprocessor system reset management, featuring a factory-trimmed VCC undervoltage threshold of 4.38 V (±2.5% over −40°C to +125°C), a 1.23 V adjustable RST IN threshold, and a fixed 140 ms reset timeout period. It delivers active-low open-drain RESET output with glitch immunity and operates down to VCC = 0.9 V.

For engineers reviewing the ADM6306D344ARJZ-R7 datasheet, ADM6306D344ARJZ-R7 pinout, ADM6306D344ARJZ-R7 application, or ADM6306D344ARJZ-R7 equivalent, key selection considerations include its dual-monitoring architecture (VCC + external rail), manual reset input support, low 5 µA supply current, SOT-23-5 packaging, and guaranteed operation across −40°C to +125°C.

Technical Context

The ADM6306D344ARJZ-R7 integrates two independent voltage monitoring paths: one internal pretrimmed comparator for VCC (nominal 4.38 V, ±2.5% tolerance at full temperature range) and one high-impedance adjustable comparator on RST IN (1.23 V threshold, ±0.03 V at 25°C). Its reset generator asserts active-low RESET for exactly 140 ms (min 140 ms, typ 200 ms, max 280 ms) after all monitored voltages exceed thresholds.

It includes a debounced manual reset (MR) input with 63.5 kΩ internal pull-up, 0.1 µs glitch rejection, and MR-to-RESET delay of 500 ns. The open-drain RESET output sinks up to 3.2 mA at VCC > 4.25 V and remains valid as long as VCC exceeds 0.9 V - enabling reliable reset assertion during brownout conditions.

Key Specifications

Pinout & Package

ADM6306D344ARJZ-R7 is housed in a RoHS-compliant 5-lead SOT-23 (RJ-5) package, measuring 2.90 mm × 1.60 mm × 1.15 mm, with JEDEC MO-178-AA compliance and C2 pin 1 orientation for tape-and-reel handling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326–T438+T and TPS3808G33DBVR, ADM6306D344ARJZ-R7 uniquely combines factory-trimmed 4.38 V VCC monitoring, 1.23 V adjustable RST IN, manual reset input, and 140 ms timeout in one SOT-23-5 device - reducing BOM count and PCB area while enabling robust dual-rail supervision in space-constrained designs.

Availability

ADM6306D344ARJZ-R7 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and portable medical devices requiring stable component supply with guaranteed −40°C to +125°C operation and long-term lifecycle support.

Supply support for ADM6306D344ARJZ-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, serving precision instrumentation, industrial automation, and automotive markets since 1965.

The ADM6306 series belongs to Analog Devices' Multi-Voltage Monitor product line, engineered specifically for deterministic reset generation in microprocessor-based systems operating under harsh voltage transients and extended temperature ranges.

FAQ

What is the exact VCC undervoltage threshold voltage of the ADM6306D344ARJZ-R7?

The ADM6306D344ARJZ-R7 has a factory-trimmed VCC threshold of 4.38 V, with tolerance of ±2.5% over the full operating temperature range (−40°C to +125°C). This value corresponds to Threshold #44 in Table 6 of the datasheet and is laser-trimmed during manufacturing - no external calibration is required. The ADM6306D344ARJZ-R7 maintains this accuracy without drift compensation circuitry.

Does the ADM6306D344ARJZ-R7 support manual reset, and how is it implemented?

Yes, the ADM6306D344ARJZ-R7 includes a dedicated MR (Manual Reset) input on Pin 3. It features an internal 63.5 kΩ pull-up resistor, accepts active-low logic, rejects glitches shorter than 0.1 µs, and asserts RESET for the full 140 ms timeout upon MR falling edge. The ADM6306D344ARJZ-R7 requires no external components for basic push-button reset functionality.

What is the minimum VCC voltage required for the ADM6306D344ARJZ-R7 RESET output to remain valid?

The ADM6306D344ARJZ-R7 RESET output remains valid (i.e., capable of driving low) as long as VCC exceeds 0.9 V. Below this level, the internal circuitry cannot guarantee correct reset state. This feature allows the ADM6306D344ARJZ-R7 to assert reset during deep brownout conditions where other supervisors may release prematurely.

Can the ADM6306D344ARJZ-R7 monitor two independent power rails simultaneously?

Yes - the ADM6306D344ARJZ-R7 monitors VCC (at 4.38 V) and an external rail via RST IN (at 1.23 V) concurrently. Both comparators operate independently; RESET asserts if either falls below its threshold. The ADM6306D344ARJZ-R7 does not require shared timing or sequencing between rails, making it suitable for multivoltage systems with asynchronous power-up sequences.

What is the guaranteed reset timeout duration for the ADM6306D344ARJZ-R7 across temperature?

The ADM6306D344ARJZ-R7 provides a minimum reset timeout of 140 ms, typical of 200 ms, and maximum of 280 ms over −40°C to +125°C. This is specified in Table 7 (ADM630xD3) and validated across process, voltage, and temperature corners - ensuring consistent MCU boot hold time regardless of environmental stress.