Analog Devices Inc. ADM6315-29D4ARTRL7

Overview

ADM6315-29D4ARTRL7 from Analog Devices is a precision open-drain microprocessor supervisory circuit in SOT-143 package, monitoring 2.93 V supply with ±2.5% threshold accuracy over −40°C to +85°C, 1120 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 modules and industrial controllers.

For engineers reviewing the ADM6315-29D4ARTRL7 datasheet, ADM6315-29D4ARTRL7 pinout, ADM6315-29D4ARTRL7 application, or ADM6315-29D4ARTRL7 equivalent, key selection criteria include reset threshold tolerance, temperature range compliance (−40°C to +125°C), manual reset input timing (≥1 μs pulse width), open-drain output drive capability (3.2 mA sink at VCC > 4.25 V), and SOT-143 footprint compatibility.

Technical Context

The ADM6315-29D4ARTRL7 implements a precision bandgap-based voltage reference comparator with built-in hysteresis and temperature compensation (60 ppm/°C), enabling reliable brownout detection even during fast VCC transients (35 μs response to 1 mV/μs fall rate). Its internal reset timer is factory-programmed for 1120 ms minimum assertion after VCC rise or MR deassertion.

It features a debounced manual reset input (MR) with 100 ns glitch rejection and guaranteed recognition of ≥1 μs low pulses, plus an open-drain RESET output compatible with mixed-voltage systems-capable of sinking current from sources operating above its own VCC, supporting level-shifted reset signaling across voltage domains.

Key Specifications

Pinout & Package

ADM6315-29D4ARTRL7 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 performance (θJA = 330°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US29D4+T and TPS3808G33DBVR, the ADM6315-29D4ARTRL7 provides guaranteed −40°C to +125°C operation and integrated MR pull-up in a 4-pin SOT-143, simplifying design for high-reliability automotive and industrial applications without sacrificing reset timing precision or low-power operation.

Availability

ADM6315-29D4ARTRL7 is available at Aetrix Electronics and suitable for automotive safety modules, industrial PLC controllers, portable medical instruments, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADM6315-29D4ARTRL7 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, low-power, and temperature-stable voltage supervision for mission-critical embedded systems where deterministic reset behavior under brownout and thermal stress is non-negotiable.

FAQ

What is the exact reset threshold voltage and tolerance for ADM6315-29D4ARTRL7?

The ADM6315-29D4ARTRL7 has a nominal reset threshold of 2.93 V, with a tolerance of ±2.5% 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 ICs malfunction. The ADM6315-29D4ARTRL7 uses an internal bandgap reference with 60 ppm/°C temperature coefficient to maintain stability across its full operating range.

Does ADM6315-29D4ARTRL7 require an external pull-up resistor on the RESET pin?

Yes, ADM6315-29D4ARTRL7 features an open-drain RESET output and requires an external pull-up resistor to the target logic rail (e.g., 3.3 V or 5 V). The device can sink up to 3.2 mA when asserted at VCC > 4.25 V, so the pull-up value must be selected to ensure proper logic-high voltage under worst-case loading. Typical values range from 4.7 kΩ to 10 kΩ depending on bus capacitance and drive strength requirements.

What is the function and electrical behavior of the MR pin on ADM6315-29D4ARTRL7?

The MR (Manual Reset) pin on ADM6315-29D4ARTRL7 is an active-low, debounced input that forces RESET assertion when pulled below its threshold (0.3 × VCC for VTH < 4 V). It rejects glitches shorter than 100 ns and guarantees recognition of pulses ≥1 μs. When left floating, an internal 32–100 kΩ pull-up to VCC holds MR high. This eliminates external components for basic manual reset implementation while maintaining noise immunity in electrically noisy environments.

How does the 1120 ms reset timeout of ADM6315-29D4ARTRL7 impact system startup timing?

The 1120 ms minimum reset timeout of ADM6315-29D4ARTRL7 ensures the RESET signal remains asserted long enough for slow-ramping power supplies, crystal oscillator stabilization, PLL lock acquisition, and firmware self-test routines to complete before the host processor exits reset. This fixed timeout is factory-programmed and does not require external capacitors, reducing design complexity and improving timing predictability compared to adjustable-reset supervisors.

Is ADM6315-29D4ARTRL7 pin-compatible with any legacy supervisory ICs?

Yes, ADM6315-29D4ARTRL7 is pin-compatible with the ADM811 series in the same SOT-143 package, sharing identical pinout (GND, RESET, MR, VCC) and open-drain RESET functionality. However, ADM6315-29D4ARTRL7 offers improved temperature range (−40°C to +125°C vs. −40°C to +85°C), tighter threshold accuracy, and longer timeout options. No PCB changes are required for drop-in replacement where the 1120 ms timeout and 2.93 V threshold meet system requirements.