Analog Devices Inc. ADM6315-45D4ARTRL7

Overview

ADM6315-45D4ARTRL7 from Analog Devices is a precision open-drain microprocessor supervisory circuit that monitors 4.50 V supply voltage with ±3.5% threshold accuracy over −40°C to +125°C, asserts reset for minimum 1120 ms after power-up or brownout, and consumes only 5 μA typical supply current. It provides manual reset input with 100 ns glitch rejection and operates down to VCC > 1 V, making it suitable for automotive safety systems requiring robust power-on reset and brownout protection.

For engineers reviewing the ADM6315-45D4ARTRL7 datasheet, ADM6315-45D4ARTRL7 pinout, ADM6315-45D4ARTRL7 application, or ADM6315-45D4ARTRL7 equivalent, key selection criteria include its 4.50 V trip point, 1120 ms minimum timeout, SOT-143 package footprint, open-drain RESET output compatible with higher-voltage logic, and guaranteed operation across −40°C to +125°C industrial/automotive temperature range.

Technical Context

The ADM6315-45D4ARTRL7 implements a precision bandgap-based voltage reference comparator with temperature-compensated hysteresis to detect 4.50 V supply degradation as small as 1.8%. Its internal timing circuit generates a fixed 1120 ms (min) reset pulse upon VCC rise above threshold or MR assertion.

It features an open-drain RESET output capable of sinking up to 3.2 mA at VCC > 4.25 V, a debounced manual reset input (MR) with 1 μs minimum pulse width requirement and 100 ns transient immunity, and operates with full functionality down to VCC = 1 V - enabling reliable reset generation even during deep brownout conditions.

Key Specifications

Pinout & Package

ADM6315-45D4ARTRL7 is housed in a 4-lead SOT-143 (RA-4) surface-mount package measuring 2.9 mm × 1.6 mm × 1.15 mm, optimized for space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US45D4+T and TPS3808G33DBVR, ADM6315-45D4ARTRL7 uniquely delivers 4.50 V supervision with ±3.5% accuracy across −40°C to +125°C, integrated MR debouncing, and open-drain compatibility with mixed-voltage systems - making it optimal for automotive and high-reliability industrial deployments where temperature resilience and hardware-level reset integrity are mandatory.

Availability

ADM6315-45D4ARTRL7 is available at Aetrix Electronics and suitable for automotive safety systems, industrial PLC controllers, medical infusion pumps, and railway signaling interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADM6315-45D4ARTRL7 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The ADM6315 product line delivers precision voltage supervision with factory-trimmed thresholds and guaranteed timeout periods, designed specifically for mission-critical power sequencing and fail-safe reset in automotive ECUs, industrial controllers, and safety-certified equipment.

FAQ

What is the exact reset threshold voltage and tolerance for ADM6315-45D4ARTRL7?

The ADM6315-45D4ARTRL7 has a nominal reset threshold of 4.50 V with a tolerance of ±3.5% over the full operating temperature range of −40°C to +125°C. This means the actual trip point falls between 4.34 V and 4.66 V at temperature extremes, ensuring reliable detection of 4.5 V rail failure while accommodating manufacturing and thermal drift variations. The specification is verified per Analog Devices' Rev. I datasheet Table 1.

Does ADM6315-45D4ARTRL7 support manual reset, and what are its timing requirements?

Yes, ADM6315-45D4ARTRL7 includes a dedicated MR (manual reset) input that is active-low and internally debounced. It guarantees recognition of any negative-going pulse ≥1 μs in width and rejects transients <100 ns. When MR is pulled low, RESET asserts immediately and remains low for the full 1120 ms timeout period. This behavior is confirmed in the Functional Block Diagram and Pin Function Descriptions of the ADM6315 datasheet.

What is the minimum supply voltage at which ADM6315-45D4ARTRL7 can assert reset?

ADM6315-45D4ARTRL7 can assert RESET down to VCC = 1 V, as specified in the Absolute Maximum Ratings and General Description sections of the datasheet. This capability ensures fail-safe reset generation even during deep brownout conditions where the monitored supply collapses below typical logic thresholds - a critical feature for automotive and safety-critical applications.

Is ADM6315-45D4ARTRL7 pin-compatible with other supervisory ICs?

ADM6315-45D4ARTRL7 is explicitly stated as pin-compatible with the ADM811 in the datasheet Features section. Both devices share identical 4-lead SOT-143 pinout (GND, RESET, MR, VCC) and open-drain RESET output architecture. However, ADM811 variants differ in threshold voltage and timeout options, so electrical substitution requires verification of matching trip point and timing specifications.

What package type and dimensions does ADM6315-45D4ARTRL7 use?

ADM6315-45D4ARTRL7 uses the 4-lead SOT-143 (RA-4) package, with outline dimensions of 2.9 mm × 1.6 mm × 1.15 mm. This compact surface-mount footprint is documented in the Outline Dimensions section of the datasheet and supported by land pattern recommendations from Analog Devices' Package Index. The RA-4 designation confirms mechanical and soldering compatibility across the ADM6315 family.