Analog Devices Inc. ADM6315-26D4ART-RL

Overview

ADM6315-26D4ART-RL from Analog Devices is a precision open-drain microprocessor supervisory circuit in SOT-143 package, monitoring 2.63 V supply with ±3.5% threshold accuracy over −40°C to +125°C, featuring 1120 ms minimum reset timeout, 5 μA typical supply current, and built-in debounced manual reset input. It ensures reliable power-up, brownout, and system recovery in safety-critical embedded controllers.

For engineers reviewing the ADM6315-26D4ART-RL datasheet, ADM6315-26D4ART-RL pinout, ADM6315-26D4ART-RL application, or ADM6315-26D4ART-RL equivalent, key selection criteria include reset threshold tolerance at extended temperature, open-drain output drive capability into higher-voltage rails, manual reset glitch immunity, and compatibility with legacy ADM811-based designs.

Technical Context

The ADM6315-26D4ART-RL implements a precision bandgap-based voltage reference comparator with internal hysteresis and temperature-compensated trip point (60 ppm/°C), enabling stable 2.63 V monitoring across automotive-grade temperature range. Its reset assertion triggers on VCC falling below threshold or MR low, with 35 μs typical response to 1 mV/μs supply decay.

It features an open-drain RESET output capable of sinking up to 3.2 mA at VCC > 4.25 V, supporting level-shifted interfacing to higher-voltage logic domains. The MR input accepts ≥1 μs pulses and rejects <100 ns glitches, with internal 32–100 kΩ pull-up resistance when unused.

Key Specifications

Pinout & Package

ADM6315-26D4ART-RL is housed in a 4-lead SOT-143 package (RA-4), measuring 2.9 mm × 1.6 mm × 1.15 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 MAX6315US26D4+T and TPS3808G33DBVR, ADM6315-26D4ART-RL uniquely combines automotive-grade temperature range, open-drain output for mixed-voltage interfacing, and guaranteed 1120 ms reset hold-making it optimal for safety-critical industrial and transportation systems requiring deterministic timing and robust noise immunity.

Availability

ADM6315-26D4ART-RL is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC CPU boards, medical infusion pump controllers, and railway signaling interface units requiring stable component supply with guaranteed long-term availability.

Supply support for ADM6315-26D4ART-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 reliability, temperature, and transient immunity requirements in automotive and industrial control applications.

FAQ

What is the exact reset threshold voltage and tolerance for ADM6315-26D4ART-RL?

The ADM6315-26D4ART-RL has a nominal reset threshold of 2.63 V, with tolerance of ±2.5% at 25°C and ±3.5% over the full −40°C to +125°C operating temperature range. This is specified in Table 1 of the Rev. I datasheet under "RESET VOLTAGE THRESHOLD (VTH)" and confirmed in Table 5 for the -26D4 variant. The part is laser-trimmed at wafer test to achieve this precision.

Does ADM6315-26D4ART-RL support operation below 2.5 V supply?

Yes, ADM6315-26D4ART-RL operates down to VCC = 1 V, and asserts RESET while VCC remains below 2.63 V - including during deep brownout conditions. Its internal circuitry remains functional and produces valid reset output even at 1 V, as stated in the "Operating Voltage" specification (1 V to 5.5 V) and "Reset assertion down to VCC > 1 V" feature list.

Is ADM6315-26D4ART-RL pin-compatible with the ADM811?

Yes, ADM6315-26D4ART-RL is explicitly documented as pin-compatible with the ADM811 in the datasheet's FEATURES section. Both use identical SOT-143 pinout: Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC. No PCB layout changes are required when upgrading from ADM811-26D4ART-RL or equivalent variants.

What is the minimum reset timeout period for ADM6315-26D4ART-RL?

The ADM6315-26D4ART-RL provides a minimum reset timeout period of 1120 ms, as defined in the "RESET ACTIVE TIMEOUT PERIOD" table for the "ADM6315xxD4" variant and confirmed in Table 5 of the Ordering Guide. This value is guaranteed over −40°C to +85°C and remains ≥896 ms at +125°C.

Can ADM6315-26D4ART-RL drive a 5 V logic input directly?

Yes, ADM6315-26D4ART-RL's open-drain RESET output can interface directly to 5 V logic inputs when used with an external pull-up resistor to 5 V. The datasheet confirms RESET can sink up to 3.2 mA at VCC > 4.25 V, and its output leakage is only 1 μA when deasserted - making it fully compatible with standard 5 V CMOS inputs without level-shifting circuitry.