Analog Devices Inc. ADM6315-46D1ARTRL7

Overview

ADM6315-46D1ARTRL7 from Analog Devices is a precision open-drain microprocessor supervisory circuit in SOT-143 package, monitoring 4.63 V supply with ±2.5% threshold accuracy over −40°C to +85°C, 1 ms minimum reset timeout, and 5 μA typical supply current. It provides reliable power-on reset, brownout detection, and manual reset for embedded microcontroller systems.

For engineers reviewing the ADM6315-46D1ARTRL7 datasheet, ADM6315-46D1ARTRL7 pinout, ADM6315-46D1ARTRL7 application, or ADM6315-46D1ARTRL7 equivalent, key selection criteria include reset threshold tolerance, timeout period, manual reset glitch immunity, open-drain output drive capability, and SOT-143 thermal resistance (330°C/W).

Technical Context

The ADM6315-46D1ARTRL7 implements a precision bandgap-based voltage reference comparator with built-in hysteresis and temperature compensation (60 ppm/°C), enabling accurate 4.63 V trip point detection across industrial temperature range. Its internal debounced manual reset input rejects transients <100 ns and guarantees response to pulses ≥1 μs.

Reset assertion occurs within 35 μs during VCC fall at 1 mV/μs, and RESET remains active low for ≥1 ms after VCC rises above threshold or MR deasserts. The open-drain RESET output sinks up to 3.2 mA at VCC > 4.25 V while supporting level-shifted interfacing with higher-voltage logic.

Key Specifications

Pinout & Package

Package: 4-Lead SOT-143 (RA-4), surface-mount, 330°C/W junction-to-ambient thermal resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326–46D1T and TPS3808G33DBVR, the ADM6315-46D1ARTRL7 uniquely combines precise 4.63 V monitoring, 1 ms timeout, open-drain output, and SOT-143 footprint-enabling drop-in replacement in legacy designs originally using ADM811, without layout or BOM changes.

Availability

ADM6315-46D1ARTRL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical patient monitors, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADM6315-46D1ARTRL7 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 product line delivers precision voltage supervision for microprocessor-based systems, emphasizing low power, temperature-stable thresholds, and robust manual reset functionality in space-constrained applications.

FAQ

What is the exact reset threshold voltage of the ADM6315-46D1ARTRL7 and how does it vary with temperature?

The ADM6315-46D1ARTRL7 has a nominal reset threshold of 4.63 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 approximately ±0.028 V across the full industrial range. This specification is confirmed in Table 1 of the Rev. I datasheet under "RESET VOLTAGE THRESHOLD (VTH)".

Does the ADM6315-46D1ARTRL7 support manual reset, and what are the electrical requirements for the MR pin?

Yes, the ADM6315-46D1ARTRL7 includes a debounced manual reset (MR) input. MR is active-low, with input threshold of 0.8 V (VIL) and 2.4 V (VIH) when VTH > 4 V. It rejects glitches <100 ns and requires ≥1 μs pulse width for reliable activation. No external pull-up is needed, and MR may be left floating when unused.

What is the minimum reset timeout period for the ADM6315-46D1ARTRL7, and how is it guaranteed across temperature?

The ADM6315-46D1ARTRL7 has a minimum reset timeout of 1 ms, specified as 0.8 ms to 2.4 ms over −40°C to +125°C per Table 1. At −40°C to +85°C, the range is tighter: 1 ms to 2 ms. This timeout begins after VCC rises above threshold and MR goes high, ensuring consistent microprocessor initialization timing regardless of ambient conditions.

Can the ADM6315-46D1ARTRL7 operate with supply voltages below 2.5 V, and what is its functional lower limit?

Yes, the ADM6315-46D1ARTRL7 operates down to VCC = 1 V, as stated in the Absolute Maximum Ratings and General Description. While its 4.63 V threshold is optimized for 5 V systems, reset assertion remains valid even when VCC drops to 1 V - enabling brownout detection and controlled shutdown in low-voltage fault conditions.

Is the ADM6315-46D1ARTRL7 pin-compatible with other devices in the ADM6315 family or with the ADM811?

Yes, the ADM6315-46D1ARTRL7 is pin-compatible with all ADM6315 variants (e.g., ADM6315-31D1ARTZR7) and with the ADM811, sharing identical SOT-143 pinout (GND, RESET, MR, VCC). This allows direct substitution in existing layouts without PCB modification, provided the reset threshold and timeout requirements align with the target application.