Analog Devices Inc. ADM6315-46D4ART-RL

Overview

ADM6315-46D4ART-RL from Analog Devices is a precision open-drain microprocessor supervisory circuit designed to monitor 4.63 V supply rails with ±3.5% threshold accuracy over −40°C to +125°C, assert reset for ≥1120 ms after power-up or brownout, and support manual reset via debounced MR input. It operates down to VCC > 1 V and consumes only 5 μA typical supply current, making it suitable for battery-backed industrial controllers and automotive safety modules requiring reliable power-on reset and brownout protection.

For engineers reviewing the ADM6315-46D4ART-RL datasheet, ADM6315-46D4ART-RL pinout, ADM6315-46D4ART-RL application, or ADM6315-46D4ART-RL equivalent, key selection criteria include its 4.63 V trip point, 1120 ms minimum reset timeout, SOT-143 package compatibility, open-drain RESET output capable of sinking 3.2 mA at VCC > 4.25 V, and guaranteed operation across −40°C to +125°C.

Technical Context

The ADM6315-46D4ART-RL implements a precision bandgap-based voltage reference comparator with temperature-compensated hysteresis (60 ppm/°C) to detect 4.63 V supply degradation as small as 1.8%. Its internal timing circuit generates a fixed 1120 ms (min) active-low reset pulse upon VCC rise above threshold or MR assertion.

It features an open-drain RESET output compatible with mixed-voltage systems (e.g., sinking from 5 V logic while powered by 3.3 V), a debounced manual reset input rejecting <100 ns glitches and accepting ≥1 μs pulses, and operates with full functionality down to VCC = 1 V - enabling robust reset generation even during deep brownout conditions.

Key Specifications

Pinout & Package

ADM6315-46D4ART-RL is housed in a 4-lead SOT-143 package (RA-4), measuring 2.9 mm × 2.4 mm × 1.1 mm, with gull-wing leads optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US46D4+T and TPS3808G33DBVR, the ADM6315-46D4ART-RL offers guaranteed 4.63 V trip accuracy across extended temperature, fixed 1120 ms timing without external components, and proven field reliability in automotive and railway environments - making it optimal for safety-critical, no-compromise supervision.

Availability

ADM6315-46D4ART-RL is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, and medical infusion pump controllers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for ADM6315-46D4ART-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, Inc. 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 high-reliability power supervision in harsh environments - delivering precision voltage monitoring, robust reset timing, and wide-temperature operation for mission-critical embedded systems.

FAQ

What is the exact reset threshold voltage of the ADM6315-46D4ART-RL?

The ADM6315-46D4ART-RL has a nominal reset threshold of 4.63 V, with tolerance of ±2.5% over −40°C to +85°C and ±3.5% over −40°C to +125°C. This value is laser-trimmed at wafer test and verified per Analog Devices' production specifications - the "46" in the part number directly encodes the 4.63 V trip point, and the "D4" denotes the 1120 ms timeout variant.

Does the ADM6315-46D4ART-RL require an external pull-up resistor on the RESET pin?

Yes, the ADM6315-46D4ART-RL features an open-drain RESET output and requires an external pull-up resistor to the target logic rail (e.g., 3.3 V or 5 V). The datasheet specifies that RESET can sink up to 3.2 mA when VCC > 4.25 V, so a 10 kΩ pull-up to 3.3 V yields ~0.33 mA load - well within safe operating limits for the ADM6315-46D4ART-RL output stage.

Can the ADM6315-46D4ART-RL operate with VCC below 2.5 V?

Yes, the ADM6315-46D4ART-RL is fully specified to operate down to VCC = 1 V. Its reset assertion remains functional even when VCC drops below 2.5 V, and the RESET output maintains ≤0.3 V saturation voltage while sinking 80 μA - enabling reliable brownout detection and reset hold-down in ultra-low-voltage failure modes.

Is the ADM6315-46D4ART-RL pin-compatible with the ADM811?

Yes, the ADM6315-46D4ART-RL is explicitly stated in its datasheet as pin compatible with the ADM811 series. Both devices share identical SOT-143 pinout (GND, RESET, MR, VCC), same footprint, and compatible electrical behavior - allowing direct replacement in legacy designs originally using ADM811-46D4 or equivalent variants without PCB modification.

What is the minimum pulse width accepted on the MR input of the ADM6315-46D4ART-RL?

The MR input of the ADM6315-46D4ART-RL guarantees acceptance of negative-going pulses ≥1 μs in duration. It also rejects transients <100 ns (typical), providing inherent noise immunity. This specification is validated across −40°C to +125°C and applies regardless of VCC level - ensuring robust manual reset activation in electrically noisy environments like motor drives or railway cabinets.