Analog Devices Inc. ADM6315-26D3ARTRL7

Overview

ADM6315-26D3ARTRL7 from Analog Devices is a precision open-drain microprocessor supervisory circuit in 4-lead SOT-143 package, monitoring VCC at 2.63 V ±2.5% over −40°C to +85°C, asserting reset for ≥140 ms after power-up or brownout, with 5 μA typical supply current and manual reset input (MR) supporting 1 μs minimum pulse width.

For engineers reviewing the ADM6315-26D3ARTRL7 datasheet, ADM6315-26D3ARTRL7 pinout, ADM6315-26D3ARTRL7 application, or ADM6315-26D3ARTRL7 equivalent, key selection criteria include reset threshold accuracy, timeout period stability across temperature, low-quiescent-current operation in battery-sensitive systems, and compatibility with manual reset switches or digital control signals.

Technical Context

The ADM6315-26D3ARTRL7 implements a precision bandgap-based voltage reference comparator with ±2.5% threshold tolerance over −40°C to +85°C and 60 ppm/°C temperature coefficient. Its internal timing circuit ensures minimum 140 ms reset assertion after VCC rises above 2.63 V or MR deasserts.

It features an open-drain RESET output capable of sinking 3.2 mA at VCC > 4.25 V, a debounced manual reset input rejecting <100 ns glitches, and operates down to VCC = 1 V while maintaining reset assertion - enabling reliable supervision even during deep brownout conditions.

Key Specifications

Pinout & Package

Package: 4-lead SOT-143 (RA-4), surface-mount, 1.3 mm × 2.9 mm footprint, θJA = 330°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US26D3+T and TPS3808G33DBVR, the ADM6315-26D3ARTRL7 uniquely combines 2.63 V precision threshold, open-drain flexibility, and guaranteed 140 ms reset hold in a pinout that matches legacy ADM811 designs - making it optimal for drop-in upgrades in space-constrained industrial controllers.

Availability

ADM6315-26D3ARTRL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical monitors, and railway signaling interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADM6315-26D3ARTRL7 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 reliable power-supply monitoring in safety-critical and battery-operated systems, emphasizing precision threshold accuracy, low power, and robust transient immunity - not general-purpose reset ICs.

FAQ

What is the exact reset threshold voltage of the ADM6315-26D3ARTRL7, and how does it vary with temperature?

The ADM6315-26D3ARTRL7 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 ±0.21% over the full industrial range - critical for systems where supply margin is tight and thermal cycling is frequent. This specification is measured and guaranteed per Analog Devices' Rev. I datasheet.

Does the ADM6315-26D3ARTRL7 support operation below 2.5 V, and what happens to reset functionality at low VCC?

Yes, the ADM6315-26D3ARTRL7 operates down to VCC = 1 V and continues asserting RESET as long as VCC remains below 2.63 V - even at 1.0 V. Its internal circuitry remains functional and guarantees reset assertion until VCC exceeds the threshold plus hysteresis, then holds RESET low for ≥140 ms. This behavior is explicitly verified in the "VCC Operating Voltage" and "RESET Active Timeout Period" sections of the datasheet.

Is the ADM6315-26D3ARTRL7 pin-compatible with the ADM811, and which pins map directly?

Yes, the ADM6315-26D3ARTRL7 is pin-compatible with the ADM811 in the SOT-143 package: Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC. Both share identical pinout, electrical behavior, and timing characteristics for the D3 timeout variant - enabling direct replacement without PCB modification, as confirmed in the "Features" and "Pin Configuration" sections of the ADM6315 datasheet.

What is the minimum pulse width required on the MR input to trigger a valid reset on the ADM6315-26D3ARTRL7?

The ADM6315-26D3ARTRL7 requires a minimum MR input pulse width of 1 μs (guaranteed) to initiate reset. Pulses shorter than 100 ns are rejected as glitches. This specification is tested and documented in the "Manual Reset Input" section of the datasheet, and applies across the full temperature range (−40°C to +125°C) with no external components needed.

Can the ADM6315-26D3ARTRL7's open-drain RESET output interface with a 5 V logic system while VCC is 3.3 V?

Yes, the ADM6315-26D3ARTRL7's open-drain RESET output can safely interface with 5 V logic systems even when VCC = 3.3 V. The datasheet confirms RESET can sink current from sources up to 6 V (absolute maximum rating), and its output leakage remains ≤1 μA when deasserted - enabling use with external 5 V pull-up resistors without level-shifter circuitry.