Analog Devices Inc. ADM6315-26D2ARTZRL

Overview

ADM6315-26D2ARTZRL from Analog Devices is a precision open-drain microprocessor supervisory circuit that monitors 2.63 V supply rails with ±2.5% threshold accuracy over −40°C to +85°C, asserts reset for ≥20 ms after power-up or brownout, and supports manual reset via debounced MR input. It operates down to VCC > 1 V and consumes only 5 μA typical quiescent current, making it suitable for low-power embedded controllers and safety-critical automotive modules.

For engineers reviewing the ADM6315-26D2ARTZRL datasheet, ADM6315-26D2ARTZRL pinout, ADM6315-26D2ARTZRL application, or ADM6315-26D2ARTZRL equivalent, key selection criteria include its 2.63 V trip point, 20 ms minimum reset timeout, SOT-143 package footprint, open-drain RESET output capable of sinking 3.2 mA at 4.25 V, and guaranteed glitch immunity against <100 ns transients on the MR line.

Technical Context

The ADM6315-26D2ARTZRL integrates a precision voltage reference comparator with hysteresis, temperature-compensated threshold (60 ppm/°C), and a monostable timer that guarantees ≥20 ms RESET assertion after VCC rises above 2.63 V or MR is pulsed low. Its internal debouncer rejects sub-microsecond noise on MR while ensuring reliable activation by ≥1 μs pulses.

Designed for brownout detection in noisy environments, it responds to VCC falling at 1 mV/μs with 35 μs typical delay and maintains reset assertion until VCC exceeds 2.63 V + hysteresis and remains stable for the full timeout period. The open-drain RESET output allows level-shifting and wired-OR interfacing with higher-voltage logic domains.

Key Specifications

Pinout & Package

ADM6315-26D2ARTZRL is housed in a 4-lead SOT-143 package (RA-4), measuring 2.9 mm × 1.6 mm × 1.1 mm, with gull-wing leads optimized for automated assembly and thermal dissipation (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 TPS3808G18DBVR, ADM6315-26D2ARTZRL delivers exact 2.63 V monitoring with integrated MR debounce and open-drain output in SOT-143-enabling direct replacement in legacy designs originally using ADM811, without layout changes or added components.

Availability

ADM6315-26D2ARTZRL 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 with guaranteed long-term availability and RoHS-compliant packaging.

Supply support for ADM6315-26D2ARTZRL 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 robust, low-power microprocessor supervision in harsh environments-emphasizing precision threshold accuracy, wide temperature operation, and noise-immune manual reset functionality.

FAQ

What is the exact reset threshold voltage of ADM6315-26D2ARTZRL, and how does it vary with temperature?

The ADM6315-26D2ARTZRL has a nominal reset threshold of 2.63 V, with tolerance of ±2.5% over −40°C to +85°C and ±3.5% over −40°C to +125°C. Its temperature coefficient is 60 ppm/°C, meaning threshold drift is bounded to ±0.15% over a 100°C span. This ensures predictable brownout response across automotive and industrial operating ranges without calibration.

Does ADM6315-26D2ARTZRL require an external pull-up resistor on the RESET pin, and what value is recommended?

Yes, ADM6315-26D2ARTZRL features an open-drain RESET output and requires an external pull-up resistor. A 10 kΩ to 100 kΩ resistor to the target logic supply (e.g., 3.3 V or 5 V) is recommended. The device can sink up to 3.2 mA at VCC > 4.25 V, so the pull-up must ensure RESET falls below 0.4 V when asserted while maintaining valid logic-high levels when deasserted.

Can ADM6315-26D2ARTZRL monitor supply voltages below 2.63 V, such as 1.8 V or 2.5 V?

No, ADM6315-26D2ARTZRL is factory-trimmed to a fixed 2.63 V threshold and cannot monitor lower voltages. For 1.8 V supervision, consider the TPS3808G18; for 2.5 V, the ADM6315-25D2ARTZRL variant exists but is not identical to ADM6315-26D2ARTZRL. Each ADM6315 variant is laser-trimmed to its specific trip point during manufacturing.

How does the manual reset (MR) input behave when left unconnected, and is a pull-up required?

When left floating, the MR input of ADM6315-26D2ARTZRL is internally pulled up via a 63 kΩ resistor, holding it high and disabling manual reset. No external pull-up is needed. However, in noisy environments or long trace runs, adding a 1 μF capacitor from MR to GND improves immunity to fast transients without affecting valid reset pulse detection (>1 μs).

Is ADM6315-26D2ARTZRL pin-compatible with the ADM811, and what are the implications for board reuse?

Yes, ADM6315-26D2ARTZRL is explicitly stated as pin-compatible with the ADM811 in the datasheet. Both share identical SOT-143 pinout (GND, RESET, MR, VCC), same footprint, and compatible electrical behavior-enabling direct replacement in existing ADM811-based designs without PCB modification or firmware changes.