Analog Devices Inc. ADM6315-44D3ARTRL7

Overview

ADM6315-44D3ARTRL7 from Analog Devices is a precision open-drain microprocessor supervisory circuit in SOT-143 package, monitoring 4.39 V supply with ±3.5% threshold accuracy over −40°C to +125°C, featuring 140 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 automotive safety controllers.

For engineers reviewing the ADM6315-44D3ARTRL7 datasheet, ADM6315-44D3ARTRL7 pinout, ADM6315-44D3ARTRL7 application, or ADM6315-44D3ARTRL7 equivalent, key selection criteria include reset threshold tolerance at extended temperature, open-drain output sink capability (3.2 mA @ VCC > 4.25 V), manual reset glitch immunity (100 ns rejection), and compatibility with 1 V minimum VCC assertion.

Technical Context

The ADM6315-44D3ARTRL7 implements a precision bandgap-based voltage reference comparator with hysteresis, enabling detection of ≤1.8% supply degradation. Its internal timing circuit generates a fixed 140 ms (min) reset pulse after VCC rises above 4.39 V or MR deasserts.

It features an open-drain RESET output compatible with mixed-voltage systems (e.g., sinking from 5 V logic while powered by 3.3 V), and a manually triggered reset input with guaranteed 1 μs minimum pulse acceptance and 100 ns transient rejection - critical for noisy automotive and industrial environments.

Key Specifications

Pinout & Package

ADM6315-44D3ARTRL7 is housed in a 4-lead SOT-143 package (RA-4), measuring 2.9 mm × 1.6 mm × 1.15 mm, with gull-wing leads optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US439D3+T and TPS3808G33DBVR, the ADM6315-44D3ARTRL7 uniquely combines automotive-grade temperature range, precise 4.39 V threshold, open-drain flexibility, and integrated MR debounce - making it the sole option for safety-critical 5 V system supervision where layout space, thermal margin, and noise immunity are constrained.

Availability

ADM6315-44D3ARTRL7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC safety monitors, medical infusion pump controllers, and avionics power sequencers requiring stable component supply across extended temperature and long lifecycle programs.

Supply support for ADM6315-44D3ARTRL7 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 voltage supervision in harsh environments - targeting automotive ECUs, industrial safety controllers, and portable medical devices where reliability under thermal and EMI stress is non-negotiable.

FAQ

What is the exact reset threshold voltage and tolerance for ADM6315-44D3ARTRL7?

The ADM6315-44D3ARTRL7 has a nominal reset threshold of 4.39 V, with tolerance of ±2.5% over −40°C to +85°C and ±3.5% over −40°C to +125°C. This is confirmed in Table 1 of the Rev. I datasheet under "RESET VOLTAGE THRESHOLD (VTH)" for the D3 variant. The value is laser-trimmed at wafer test and applies directly to the ADM6315-44D3ARTRL7 part number.

Does ADM6315-44D3ARTRL7 support operation below 2.5 V supply?

Yes - ADM6315-44D3ARTRL7 operates down to VCC = 1 V, and asserts RESET as long as VCC remains below 4.39 V. Its reset assertion functionality is fully specified at 1 V (see "RESET OUTPUT" section, VCC > 1 V, ISINK = 80 μA), enabling brownout detection well below standard logic supply levels.

Is the manual reset (MR) input internally pulled up on ADM6315-44D3ARTRL7?

Yes - the MR pin of ADM6315-44D3ARTRL7 includes an internal pull-up resistor of 32 kΩ to 100 kΩ (typical 63 kΩ), allowing it to float high when unused. This is documented in Table 1 ("MANUAL RESET" section) and Figure 3 pin description, eliminating need for external components unless enhanced noise immunity is required.

What is the minimum pulse width required on MR to trigger reset on ADM6315-44D3ARTRL7?

The ADM6315-44D3ARTRL7 guarantees recognition of MR low pulses ≥1 μs in duration, as stated in Table 1 under "MANUAL RESET" → "Minimum Input Pulse". Pulses shorter than 100 ns are rejected; this hardware debounce is intrinsic to the device and requires no external filtering for most applications.

Can ADM6315-44D3ARTRL7 drive a 5 V logic reset line while powered from a 3.3 V supply?

Yes - because ADM6315-44D3ARTRL7 features an open-drain RESET output, it can sink current from a 5 V pull-up while operating from a 3.3 V VCC. The datasheet confirms RESET output voltage ≤0.4 V at ISINK = 3.2 mA when VCC > 4.25 V, and ≤0.3 V at ISINK = 1.2 mA when VCC > 2.5 V - validating interoperability across voltage domains.