Analog Devices Inc. ADM6315-46D1ARTZR7

Overview

ADM6315-46D1ARTZR7 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 asserts active-low RESET during power-up, brownout, or manual reset for embedded microcontroller systems requiring reliable startup and fault recovery.

For engineers reviewing the ADM6315-46D1ARTZR7 datasheet, ADM6315-46D1ARTZR7 pinout, ADM6315-46D1ARTZR7 application, or ADM6315-46D1ARTZR7 equivalent, key selection criteria include trip point tolerance, reset timeout stability across temperature, manual reset glitch immunity, and open-drain output compatibility with mixed-voltage logic interfaces.

Technical Context

The ADM6315-46D1ARTZR7 implements a precision bandgap-based voltage reference comparator with built-in hysteresis and temperature-compensated threshold (60 ppm/°C), enabling accurate detection of ≤1.8% supply degradation. Its internal timing circuit generates a guaranteed minimum 1 ms reset pulse after VCC rises above 4.63 V or MR deasserts.

It features a debounced manual reset input (MR) with 100 ns glitch rejection and ≥1 μs pulse acceptance, plus an open-drain RESET output capable of sinking 3.2 mA at VCC > 4.25 V. The device operates down to VCC = 1 V and supports system-level reset coordination across diverse voltage domains.

Key Specifications

Pinout & Package

ADM6315-46D1ARTZR7 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 automated surface-mount assembly and thermal dissipation (θJA = 330°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US46D1+T and TPS3808G33DBVR, the ADM6315-46D1ARTZR7 uniquely combines 4.63 V precision monitoring, 1 ms guaranteed timeout, −40°C to +125°C qualification, and open-drain output-making it irreplaceable in automotive and high-reliability industrial designs requiring exact trip point and interface flexibility.

Availability

ADM6315-46D1ARTZR7 is available at Aetrix Electronics and suitable for automotive ECU development, industrial PLC design, medical patient monitor production, and smart energy meter manufacturing requiring stable component supply and long-term lifecycle assurance.

Supply support for ADM6315-46D1ARTZR7 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 voltage supervision for microprocessor-based systems, designed specifically to ensure robust power-on, brownout, and manual reset behavior in harsh environments where reliability is non-negotiable.

FAQ

What is the exact reset threshold voltage of the ADM6315-46D1ARTZR7?

The ADM6315-46D1ARTZR7 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. This value is laser-trimmed during production and confirmed in Table 5 of the official datasheet. The ADM6315-46D1ARTZR7 is specifically configured for this trip point, distinct from other variants like ADM6315-44D1ARTZR7 (4.39 V) or ADM6315-31D1ARTZR7 (3.08 V).

Does the ADM6315-46D1ARTZR7 support manual reset functionality?

Yes, the ADM6315-46D1ARTZR7 includes a dedicated MR (Manual Reset) pin (Pin 3) that accepts active-low signals. It guarantees recognition of input pulses ≥1 μs and rejects glitches <100 ns. When MR is pulled low, RESET asserts immediately and remains low for the full timeout period (1 ms minimum), independent of VCC level-enabling reliable operator-initiated system recovery.

What is the output configuration of the ADM6315-46D1ARTZR7 RESET pin?

The ADM6315-46D1ARTZR7 features an open-drain RESET output (Pin 2), which actively pulls low during reset assertion and presents high-impedance otherwise. This requires an external pull-up resistor to define the logic-high voltage level, allowing interoperability with higher-voltage peripherals and enabling wired-OR reset bus configurations-critical for multi-supply systems.

Can the ADM6315-46D1ARTZR7 operate with supply voltages below 2.5 V?

Yes, the ADM6315-46D1ARTZR7 functions down to VCC = 1 V, and its RESET output remains valid (≤0.3 V at 80 μA sink) even at that level. However, the 4.63 V threshold monitoring only applies when VCC exceeds ~2.5 V; below that, the device continues asserting RESET until VCC rises above the trip point, providing fail-safe behavior during deep brownout.

Is the ADM6315-46D1ARTZR7 pin-compatible with other devices in the ADM6315 family?

Yes, all ADM6315 variants-including ADM6315-46D1ARTZR7-share identical SOT-143 (RA-4) pinout and footprint. Pin 1 is GND, Pin 2 is RESET, Pin 3 is MR, and Pin 4 is VCC. This uniformity allows drop-in replacement across trip point and timeout options without PCB redesign, provided the system's voltage and timing requirements align with the selected variant.