Analog Devices Inc. ADM6315-46D3ART-RL

Overview

ADM6315-46D3ART-RL from Analog Devices is a precision open-drain microprocessor supervisory circuit in SOT-143 package, monitoring 4.63 V supply with ±3.5% threshold accuracy over −40°C to +125°C, asserting reset for ≥140 ms after power-up or brownout, and consuming only 5 μA typical supply current. It serves as a system-level voltage monitor and reset generator in automotive safety controllers.

For engineers reviewing the ADM6315-46D3ART-RL datasheet, ADM6315-46D3ART-RL pinout, ADM6315-46D3ART-RL application, or ADM6315-46D3ART-RL equivalent, key selection criteria include reset timeout (140 ms min), trip point (4.63 V), operating temperature (−40°C to +125°C), open-drain RESET output compatibility with higher-voltage logic, and manual reset input with 100 ns glitch immunity.

Technical Context

The ADM6315-46D3ART-RL implements a precision bandgap-based voltage reference comparator with built-in hysteresis and temperature compensation (60 ppm/°C), enabling accurate detection of ≤1.8% supply degradation. Its internal timing circuit generates a fixed minimum reset assertion period of 140 ms after VCC rises above 4.63 V or MR deasserts.

It features an active-low debounced manual reset input (MR) with guaranteed 1 μs pulse acceptance and 100 ns glitch rejection, and an open-drain RESET output capable of sinking 3.2 mA at VCC > 4.25 V while remaining functional down to VCC = 1 V - supporting brownout detection and safe system recovery in noisy, high-reliability environments.

Key Specifications

Pinout & Package

ADM6315-46D3ART-RL is housed in a 4-lead SOT-143 package (RA-4), measuring 2.9 mm × 1.3 mm × 1.0 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 MAX6315US46D3+T and TPS3808G33DBVR, ADM6315-46D3ART-RL uniquely combines 4.63 V precision monitoring, 140 ms timeout, −40°C to +125°C qualification, open-drain RESET, and debounced MR in one SOT-143 package - making it the sole fit for automotive-grade 5 V rail supervision with manual reset capability.

Availability

ADM6315-46D3ART-RL 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 ADM6315-46D3ART-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 designed specifically for robust, low-power microprocessor supervision in harsh environments - delivering precision voltage monitoring, guaranteed reset timing, and noise-immune manual reset in miniature packages.

FAQ

What is the exact reset threshold voltage of the ADM6315-46D3ART-RL?

The ADM6315-46D3ART-RL has a nominal reset threshold of 4.63 V, with tolerance of ±3.5% over the full operating temperature range of −40°C to +125°C. This value is laser-trimmed at wafer test and verified per Analog Devices' production test flow. The ADM6315-46D3ART-RL does not require external components to set this threshold, and its accuracy is maintained without calibration.

Does the ADM6315-46D3ART-RL support manual reset functionality, and how is it implemented?

Yes, the ADM6315-46D3ART-RL includes a dedicated MR (Manual Reset) input (Pin 3) that is active-low and internally debounced. It accepts pulses ≥1 μs in duration and rejects transients <100 ns. When pulled low, it forces RESET to assert regardless of VCC level. The ADM6315-46D3ART-RL's MR input thresholds are 0.8 V (VIL) and 2.4 V (VIH) for VTH > 4 V, ensuring compatibility with standard logic families.

What is the minimum reset timeout period specified for the ADM6315-46D3ART-RL?

The ADM6315-46D3ART-RL provides a minimum reset timeout period of 140 ms after VCC rises above the 4.63 V threshold and MR is released. This value is guaranteed over −40°C to +125°C and is part of the D3 suffix designation. The actual timeout may extend up to 280 ms at maximum temperature, but the 140 ms minimum ensures sufficient hold time for microprocessor initialization sequences.

Can the ADM6315-46D3ART-RL operate with supply voltages below 2.5 V?

Yes, the ADM6315-46D3ART-RL functions down to VCC = 1 V, enabling reset assertion during deep brownout conditions. While its 4.63 V threshold applies only when VCC is within normal operating range, the ADM6315-46D3ART-RL continues to monitor and assert RESET as VCC falls below 4.63 V - and remains operational (with reduced sink capability) even at 1 V, supporting fail-safe behavior in battery-depleted systems.

Is the RESET output of the ADM6315-46D3ART-RL push-pull or open-drain?

The RESET output of the ADM6315-46D3ART-RL is open-drain, as confirmed in the Functional Block Diagram, Typical Operating Circuit, and Pin Function Descriptions. This allows flexible interfacing: an external pull-up resistor can connect RESET to any logic supply (e.g., 3.3 V or 5 V), enabling level translation and wired-OR configurations. The ADM6315-46D3ART-RL's RESET pin sinks up to 3.2 mA when asserted at VCC > 4.25 V.