Analog Devices Inc. ADM6315-45D3ART-RL

Overview

ADM6315-45D3ART-RL from Analog Devices is a precision open-drain microprocessor supervisory circuit designed to monitor 4.5 V supply rails with ±2.5% threshold accuracy over −40°C to +85°C, assert reset for ≥140 ms minimum timeout, consume only 5 μA typical supply current, and support manual reset input with 1 μs minimum pulse width-used in automotive safety systems and industrial controllers requiring reliable brownout detection.

For engineers reviewing the ADM6315-45D3ART-RL datasheet, ADM6315-45D3ART-RL pinout, ADM6315-45D3ART-RL application, or ADM6315-45D3ART-RL equivalent, key selection criteria include its 4.5 V trip point, 140 ms reset timeout, SOT-143 package, open-drain RESET output, and compatibility with systems operating down to VCC > 1 V.

Technical Context

The ADM6315-45D3ART-RL implements a precision bandgap-based voltage reference comparator with temperature-compensated threshold (60 ppm/°C), enabling accurate detection of ≤1.8% supply degradation. Its internal timing circuit generates a fixed 140 ms (min) reset assertion after VCC rises above 4.5 V or MR deasserts.

It features a debounced manual reset input (MR) with 100 ns glitch rejection and 1 μs minimum pulse acceptance, plus an open-drain RESET output capable of sinking 3.2 mA at VCC > 4.25 V-allowing direct interfacing with higher-voltage logic domains without level shifters.

Key Specifications

Pinout & Package

ADM6315-45D3ART-RL is housed in a 4-lead SOT-143 surface-mount package (RA-4 option), measuring 2.9 mm × 2.4 mm × 1.1 mm, optimized for space-constrained PCB layouts in automotive and portable instrumentation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US45D3+T and TPS3808G33DBVR, the ADM6315-45D3ART-RL uniquely combines factory-trimmed 4.5 V accuracy, guaranteed 140 ms minimum timeout, integrated debounced MR, and open-drain output in a 4-pin SOT-143-making it optimal for space- and reliability-critical 4.5 V supervisory roles where pin count and deterministic behavior are prioritized.

Availability

ADM6315-45D3ART-RL is available at Aetrix Electronics and suitable for automotive safety systems, industrial PLC controllers, and portable medical instruments requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADM6315-45D3ART-RL 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 engineered specifically for microprocessor supervisory functions in harsh environments-delivering precision voltage monitoring, robust reset timing, and noise-immune manual reset in minimal footprint packages.

FAQ

What is the exact reset threshold voltage of the ADM6315-45D3ART-RL?

The ADM6315-45D3ART-RL has a nominal reset threshold of 4.5 V, with tolerance of ±2.5% over the −40°C to +85°C temperature range and ±3.5% over −40°C to +125°C. This specification is factory-trimmed and verified per Analog Devices' Rev. I datasheet Table 1, ensuring precise detection of 4.5 V rail faults without external calibration.

Does the ADM6315-45D3ART-RL support operation below 2.5 V supply?

Yes, the ADM6315-45D3ART-RL operates down to VCC = 1 V, and its RESET output remains functional-asserting low when VCC falls below 4.5 V and sustaining reset for ≥140 ms after recovery-even at VCC as low as 1 V with 80 μA sink capability. This enables brownout protection in deeply undervolted conditions.

Is the ADM6315-45D3ART-RL pin-compatible with the ADM811?

Yes, the ADM6315-45D3ART-RL is explicitly stated in the datasheet as pin compatible with the ADM811, sharing identical SOT-143 pinout (GND, RESET, MR, VCC) and function mapping-enabling drop-in replacement in legacy designs originally using ADM811 variants with matching threshold and timeout.

What is the minimum pulse width required on the MR pin of the ADM6315-45D3ART-RL?

The MR pin of the ADM6315-45D3ART-RL requires a minimum negative-going pulse width of 1 μs to guarantee recognition, with built-in debounce rejecting transients shorter than 100 ns. This ensures reliable manual reset activation via mechanical switches or digital signals without external filtering.

Can the ADM6315-45D3ART-RL drive a 5 V logic bus despite its own VCC being 4.5 V?

Yes, the ADM6315-45D3ART-RL features an open-drain RESET output that can sink current from logic supplies up to 6 V-so it can directly interface with a 5 V bus when pulled up to 5 V, regardless of its own 4.5 V VCC. This is confirmed in the "Interfacing to Output of Other Devices" section of the datasheet.