Analog Devices Inc. ADM6315-44D2ARTZR7

Overview

ADM6315-44D2ARTZR7 from Analog Devices is a precision open-drain microprocessor supervisory circuit in SOT-143 package, monitoring 4.39 V supply with ±2.5% threshold accuracy over −40°C to +85°C, 20 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 embedded controllers requiring reliable brownout detection and manual reset capability.

For engineers reviewing the ADM6315-44D2ARTZR7 datasheet, ADM6315-44D2ARTZR7 pinout, ADM6315-44D2ARTZR7 application, or ADM6315-44D2ARTZR7 equivalent, key selection criteria include reset threshold tolerance at temperature, open-drain output sink capability (3.2 mA @ 4.25 V), manual reset debounce timing (1 μs min pulse), and compatibility with noisy automotive or industrial supply rails.

Technical Context

The ADM6315-44D2ARTZR7 implements a precision bandgap-based voltage reference comparator with internal hysteresis and temperature-compensated trip point (60 ppm/°C). Its reset logic asserts active-low output when VCC falls below 4.39 V ±2.5% across −40°C to +85°C or when MR is pulled low.

It features a debounced manual reset input rejecting transients <100 ns, guaranteed response to ≥1 μs pulses, and an open-drain RESET output compatible with mixed-voltage systems-capable of sinking up to 3.2 mA while VCC remains as low as 1 V.

Key Specifications

Pinout & Package

ADM6315-44D2ARTZR7 is housed in a 4-lead SOT-143 surface-mount package (RA-4), measuring 2.9 mm × 1.6 mm × 1.1 mm, optimized for space-constrained PCB layouts in automotive and portable instrumentation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US44D2+T and TPS3808G33DBVR, the ADM6315-44D2ARTZR7 offers tighter threshold accuracy (±2.5% vs ±3.5%), lower ICC (5 μA vs 20 μA), and integrated MR debounce-making it optimal for safety-critical, low-power, and user-serviceable designs where 4.39 V monitoring is required.

Availability

ADM6315-44D2ARTZR7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pump controllers, and railway signaling interface boards requiring stable component supply across extended temperature and long product lifecycles.

Supply support for ADM6315-44D2ARTZR7 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 for robust power-supply monitoring in harsh environments-delivering precision reset generation, manual recovery, and transient immunity for mission-critical microprocessor systems.

FAQ

What is the exact reset threshold voltage of ADM6315-44D2ARTZR7 and how does it vary with temperature?

The ADM6315-44D2ARTZR7 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. Its temperature coefficient is 60 ppm/°C, meaning threshold drift is bounded and predictable-critical for designs operating across wide ambient ranges like automotive ECUs. This specification is confirmed in Table 1 of the Rev. I datasheet.

Does ADM6315-44D2ARTZR7 support manual reset, and what are the electrical requirements for the MR pin?

Yes, ADM6315-44D2ARTZR7 includes a debounced manual reset (MR) input. The MR pin is active-low, with VIH = 0.7 × VCC and VIL = 0.3 × VCC when VTH < 4 V, and fixed thresholds of 2.4 V (VIH) and 0.8 V (VIL) when VTH > 4 V. It rejects transients <100 ns and requires ≥1 μs pulse width for reliable assertion-enabling robust switch or GPIO-driven reset without external filtering.

What is the minimum VCC voltage at which ADM6315-44D2ARTZR7 can still assert RESET?

The ADM6315-44D2ARTZR7 guarantees RESET assertion down to VCC > 1 V, as specified in the "Operating Voltage" row of Table 1. This ensures fail-safe behavior during deep brownout conditions-such as capacitor discharge decay in backup power circuits-where other supervisors may lose functionality well above 1 V.

Is ADM6315-44D2ARTZR7 pin-compatible with any legacy supervisory ICs?

Yes, ADM6315-44D2ARTZR7 is explicitly stated as pin-compatible with the ADM811 in the datasheet Features section. Both share identical SOT-143 pinout (GND, RESET, MR, VCC) and open-drain RESET output architecture-enabling drop-in replacement in existing ADM811 designs without layout changes, provided the 4.39 V threshold meets system requirements.

What is the maximum sink current capability of the RESET output in ADM6315-44D2ARTZR7?

The RESET output of ADM6315-44D2ARTZR7 can sink up to 3.2 mA when VCC > 4.25 V (VO = 0.4 V), 1.2 mA when VCC > 2.5 V (VO = 0.3 V), and 80 μA when VCC > 1 V (VO = 0.3 V). This graded drive strength ensures compatibility with diverse pull-up voltages and load conditions across industrial and automotive applications.