Analog Devices Inc. ADM6315-26D3ARTZRL

Overview

ADM6315-26D3ARTZRL from Analog Devices is a precision open-drain microprocessor supervisory circuit in SOT-143 package, monitoring 2.63 V supply with ±2.5% threshold accuracy over −40°C to +85°C, 140 ms minimum reset timeout, 5 μA typical supply current, and reset assertion down to VCC > 1 V. It serves as a system-level power-on/brownout detector in automotive safety controllers and industrial microprocessor systems.

For engineers reviewing the ADM6315-26D3ARTZRL datasheet, ADM6315-26D3ARTZRL pinout, ADM6315-26D3ARTZRL application, or ADM6315-26D3ARTZRL equivalent, key selection criteria include reset threshold tolerance at temperature, manual reset input debounce timing, open-drain output sink capability, and compatibility with low-voltage microcontrollers operating below 3 V.

Technical Context

The ADM6315-26D3ARTZRL integrates a precision voltage reference comparator with built-in hysteresis and a temperature-compensated reset timer. Its reset assertion occurs within 35 μs during VCC fall at 1 mV/μs, and it guarantees minimum timeout of 140 ms after VCC rises above 2.63 V or MR deasserts.

It features a debounced manual reset (MR) input rejecting <100 ns glitches and accepting ≥1 μs pulses, plus an open-drain RESET output capable of sinking 3.2 mA at VCC > 4.25 V. The device operates across −40°C to +125°C with thermal resistance θJA = 330°C/W in SOT-143.

Key Specifications

Pinout & Package

ADM6315-26D3ARTZRL is housed in a 4-lead SOT-143 surface-mount package (RA-4), measuring 2.9 mm × 1.6 mm × 1.15 mm, with gull-wing leads optimized for automated assembly and thermal performance (θJA = 330°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US26D3+T and TPS3808G33DBVR, ADM6315-26D3ARTZRL uniquely combines 2.63 V precision threshold, 140 ms timeout, open-drain output, and full −40°C to +125°C operation-making it the only drop-in option for high-reliability 2.63 V rail supervision in thermally demanding environments.

Availability

ADM6315-26D3ARTZRL is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pump controllers, and railway signaling interface boards requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADM6315-26D3ARTZRL 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The ADM6315 family was designed specifically for robust, low-power microprocessor supervision in harsh environments-emphasizing precision threshold accuracy, wide temperature operation, and noise-immune manual reset functionality.

FAQ

What is the exact reset threshold voltage and tolerance for ADM6315-26D3ARTZRL?

The ADM6315-26D3ARTZRL has a nominal reset threshold of 2.63 V, with ±2.5% tolerance over the −40°C to +85°C temperature range and ±3.5% over −40°C to +125°C. This specification ensures repeatable detection of supply degradation in 2.7 V–3.3 V systems without requiring external calibration. The ADM6315-26D3ARTZRL achieves this via an internal bandgap reference and trimmed comparator.

Does ADM6315-26D3ARTZRL support manual reset, and how is it implemented?

Yes, ADM6315-26D3ARTZRL includes a dedicated MR (Manual Reset) pin that accepts active-low signals. It rejects glitches shorter than 100 ns and reliably detects pulses ≥1 μs. When MR is pulled low, RESET asserts immediately and remains low for the full 140 ms timeout period. The ADM6315-26D3ARTZRL requires no external components for basic operation, though a 1 μF capacitor to ground improves noise immunity in noisy environments.

What is the minimum VCC voltage at which ADM6315-26D3ARTZRL can still assert RESET?

The ADM6315-26D3ARTZRL guarantees RESET assertion down to VCC > 1 V, enabling fail-safe operation during deep brownout conditions. At VCC = 1.1 V, the RESET output remains functional with 80 μA sink capability and 0.3 V max voltage drop. This behavior is explicitly characterized in the datasheet and makes the ADM6315-26D3ARTZRL suitable for systems where supply collapse must trigger immediate, deterministic reset before logic corruption occurs.

Is ADM6315-26D3ARTZRL pin-compatible with any legacy supervisory ICs?

Yes, ADM6315-26D3ARTZRL is pin-compatible with the ADM811 series in the same SOT-143 package, sharing identical pinout (GND, RESET, MR, VCC) and open-drain RESET output architecture. However, the ADM6315-26D3ARTZRL offers tighter threshold tolerance (±2.5% vs. ±3.5%), lower quiescent current (5 μA vs. 8 μA), and extended temperature range (−40°C to +125°C vs. −40°C to +85°C), making it a direct upgrade path without PCB changes.

What package type and footprint does ADM6315-26D3ARTZRL use?

ADM6315-26D3ARTZRL uses the 4-lead SOT-143 package (option RA-4), with gull-wing leads, 1.6 mm body width, and 2.9 mm length. Its land pattern matches JEDEC MO-178AC, and thermal resistance is θJA = 330°C/W on standard 2-layer PCBs. The ADM6315-26D3ARTZRL's compact size and proven manufacturability make it ideal for space-constrained automotive and industrial PCBs.