Analog Devices Inc. ADM6315-26D2ART-RL

Overview

ADM6315-26D2ART-RL from Analog Devices is a precision open-drain microprocessor supervisory circuit that monitors 2.63 V supply voltage with ±2.5% threshold accuracy over −40°C to +85°C, asserts reset for minimum 20 ms, consumes 5 μA typical supply current, and features debounced manual reset input - used in automotive safety systems to ensure deterministic power-up sequencing and brownout recovery.

For engineers reviewing the ADM6315-26D2ART-RL datasheet, ADM6315-26D2ART-RL pinout, ADM6315-26D2ART-RL application, or ADM6315-26D2ART-RL equivalent, key selection criteria include reset timeout stability across temperature, VCC dropout detection down to 1 V, open-drain RESET compatibility with mixed-voltage logic, and SOT-143 footprint constraints in space-constrained embedded controllers.

Technical Context

The ADM6315-26D2ART-RL implements a bandgap-referenced comparator with hysteresis to detect 2.63 V supply degradation, asserting an active-low open-drain RESET output that remains low for ≥20 ms after VCC rises above threshold or MR deasserts. Its internal timing circuit ensures monotonic timeout behavior across −40°C to +125°C.

It integrates a glitch-filtered manual reset input (MR) with 100 ns pulse rejection and guaranteed 1 μs minimum pulse acceptance, plus pull-up resistance of 32–100 kΩ. The RESET output sinks up to 3.2 mA at VCC > 4.25 V while maintaining <0.4 V VOL, enabling direct interface with 3.3 V or 5 V logic families.

Key Specifications

Pinout & Package

Package: 4-Lead SOT-143 (RA-4), surface-mount, 1.2 mm × 2.1 mm footprint, 0.95 mm height, thermal resistance θJA = 330°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US26D2+T and TPS3808G26DBVR, the ADM6315-26D2ART-RL uniquely combines 1 V minimum VCC operation, debounced MR input, and open-drain RESET in a 4-pin SOT-143 - making it optimal for space-constrained, mixed-voltage, and safety-critical brownout recovery where deterministic reset timing and manual override are mandatory.

Availability

ADM6315-26D2ART-RL is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC modules, medical infusion pump controllers, and railway signaling interface boards requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.

Supply support for ADM6315-26D2ART-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 delivers precision voltage supervision for mission-critical embedded systems, designed specifically to meet stringent automotive AEC-Q100 Grade 1 and industrial reliability requirements with minimal footprint and ultra-low power.

FAQ

What is the exact reset threshold voltage and tolerance for ADM6315-26D2ART-RL?

The ADM6315-26D2ART-RL 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 is measured at VCC falling at 1 mV/μs and ensures reliable detection of supply degradation before downstream logic becomes unstable. The ADM6315-26D2ART-RL uses an internal bandgap reference to maintain this accuracy without external components.

Does ADM6315-26D2ART-RL support operation below 2.63 V, and what happens to RESET output?

Yes, the ADM6315-26D2ART-RL operates down to VCC = 1 V and continues asserting the active-low RESET output until VCC rises above the 2.63 V threshold and remains stable for the full 20 ms timeout period. Below 1 V, the device ceases functional operation but retains its ability to reassert RESET upon recovery. This behavior makes the ADM6315-26D2ART-RL suitable for deep brownout detection in battery-backed systems.

Can ADM6315-26D2ART-RL be used with a 3.3 V microcontroller's reset input?

Yes, the ADM6315-26D2ART-RL features an open-drain RESET output that requires an external pull-up resistor to the target logic voltage - such as 3.3 V - enabling direct interface with 3.3 V microcontrollers. When asserted, RESET sinks current while maintaining <0.3 V at ISINK = 1.2 mA, satisfying standard 3.3 V logic low requirements. No level-shifter is needed for ADM6315-26D2ART-RL integration.

Is manual reset (MR) functionality available on ADM6315-26D2ART-RL, and how is it implemented?

Yes, ADM6315-26D2ART-RL includes a dedicated MR pin (Pin 3) that provides debounced, active-low manual reset capability. It rejects glitches <100 ns and accepts pulses ≥1 μs, with input thresholds defined as 0.3 × VCC (VIL) and 0.7 × VCC (VIH). The MR pin has an internal 32–100 kΩ pull-up, so it may be left floating when unused. This feature allows field service personnel or host firmware to initiate a controlled system reset independent of supply conditions.

What package type and footprint does ADM6315-26D2ART-RL use, and is it RoHS-compliant?

ADM6315-26D2ART-RL is supplied in a 4-Lead SOT-143 (RA-4) package measuring 1.2 mm × 2.1 mm with 0.95 mm height, optimized for high-density PCB layouts. It is RoHS-compliant and lead-free, indicated by the "Z" suffix in the full ordering code (e.g., ADM6315-26D2ARTZR7). The device meets JEDEC J-STD-020 moisture sensitivity level 1 and supports standard reflow soldering profiles.