Analog Devices Inc. ADM6315-26D3ARTZR7

Overview

ADM6315-26D3ARTZR7 from Analog Devices is a precision open-drain microprocessor supervisory circuit in SOT-143 package, monitoring 2.63 V supply with ±2.5% threshold accuracy over −40°C to +85°C, 140 ms minimum reset timeout, 5 μA typical supply current, and reset assertion down to VCC > 1 V. It serves as a system-level power integrity guard in automotive safety controllers and portable instrumentation.

For engineers reviewing the ADM6315-26D3ARTZR7 datasheet, ADM6315-26D3ARTZR7 pinout, ADM6315-26D3ARTZR7 application, or ADM6315-26D3ARTZR7 equivalent, key selection criteria include reset threshold tolerance at temperature, manual reset glitch immunity (100 ns rejection), open-drain output drive capability (3.2 mA sink at 4.25 V), and compatibility with brownout detection timing under 1 mV/μs VCC fall rates.

Technical Context

The ADM6315-26D3ARTZR7 implements a precision bandgap-based voltage reference comparator with built-in hysteresis and temperature-compensated trip point (60 ppm/°C coefficient). Its internal timing circuit generates a fixed 140 ms minimum reset pulse after VCC rises above 2.63 V or MR deasserts.

It features a debounced manual reset input (MR) with guaranteed 1 μs minimum pulse acceptance and 100 ns typical glitch rejection, plus an open-drain RESET output compatible with mixed-voltage systems-capable of sinking up to 3.2 mA while referenced to a host supply higher than its own VCC.

Key Specifications

Pinout & Package

ADM6315-26D3ARTZR7 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 applications.

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 ADM6315-26D3ARTZR7 delivers tighter threshold accuracy over temperature, guaranteed 140 ms timing without external components, and proven noise immunity in automotive-grade SOT-143 packaging - making it optimal for safety-critical 2.63 V rail supervision where layout stability and qualification traceability matter.

Availability

ADM6315-26D3ARTZR7 is available at Aetrix Electronics and suitable for automotive safety controllers, portable medical instruments, industrial PLC I/O modules, and smart sensor nodes requiring stable component supply with full RoHS compliance and extended temperature support.

Supply support for ADM6315-26D3ARTZR7 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 harsh environments - delivering precision reset generation, low power consumption, and robust noise immunity for mission-critical embedded systems.

FAQ

What is the exact reset threshold voltage and tolerance for ADM6315-26D3ARTZR7?

The ADM6315-26D3ARTZR7 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 ensures detection of supply droops as small as 1.8% while maintaining system reliability across automotive and industrial operating conditions. The ADM6315-26D3ARTZR7 uses an internal bandgap reference with 60 ppm/°C temperature coefficient to maintain accuracy.

Does ADM6315-26D3ARTZR7 support operation below 2.5 V, and what is its minimum VCC?

Yes, the ADM6315-26D3ARTZR7 operates down to VCC = 1 V, enabling reset assertion during deep brownout events well below typical logic supply levels. Its internal circuitry remains functional and guarantees RESET activation as long as VCC exceeds 1 V, and the part continues to monitor the 2.63 V threshold even at reduced supply. This capability is explicitly confirmed in the Absolute Maximum Ratings and General Description sections of the ADM6315-26D3ARTZR7 datasheet.

What is the function and timing behavior of the MR pin on ADM6315-26D3ARTZR7?

The MR (Manual Reset) pin on ADM6315-26D3ARTZR7 is an active-low, debounced input that forces RESET assertion when pulled below its logic-low threshold (0.3 × VCC). It rejects glitches shorter than 100 ns and reliably accepts pulses ≥1 μs. When MR is asserted, RESET remains low for the full 140 ms timeout period after MR is released and VCC rises above 2.63 V - ensuring clean, synchronized system recovery. This behavior is documented in the Pin Function Descriptions and Theory of Operation sections.

Is ADM6315-26D3ARTZR7 pin-compatible with other devices in the ADM6315 family or with ADM811?

Yes, ADM6315-26D3ARTZR7 is pin-compatible with all ADM6315 variants (e.g., ADM6315-31D3ARTZR7, ADM6315-29D3ARTZR7) and with the ADM811 series, sharing identical SOT-143 pinout (GND, RESET, MR, VCC). This allows direct substitution within the same footprint when changing reset threshold or timeout options. The datasheet explicitly states "Pin compatible with the ADM811" and confirms uniform pin configuration across the ADM6315xxD3 ordering variants.

What are the key differences between ADM6315-26D3ARTZR7 and ADM6315-26D2ARTZR7?

The ADM6315-26D3ARTZR7 and ADM6315-26D2ARTZR7 share identical 2.63 V reset threshold and SOT-143 package, but differ in minimum reset timeout: ADM6315-26D3ARTZR7 provides 140 ms, whereas ADM6315-26D2ARTZR7 provides 20 ms. This difference affects system initialization timing - longer timeout suits complex MCUs with slow clock stabilization or multi-stage power sequencing, while shorter timeout fits simpler microcontrollers. Both exhibit same supply current, temperature range, and MR behavior.