Analog Devices Inc. ADM6315-45D2ARTZR7

Overview

ADM6315-45D2ARTZR7 from Analog Devices is a precision open-drain microprocessor supervisory circuit in SOT-143 package, monitoring 4.50 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-on/brownout detector in embedded controllers requiring reliable reset during voltage transients.

For engineers reviewing the ADM6315-45D2ARTZR7 datasheet, ADM6315-45D2ARTZR7 pinout, ADM6315-45D2ARTZR7 application, or ADM6315-45D2ARTZR7 equivalent, key selection criteria include trip point tolerance, reset timeout stability across temperature, manual reset debounce timing, open-drain output sink capability (3.2 mA at VCC > 4.25 V), and SOT-143 thermal resistance (330°C/W).

Technical Context

The ADM6315-45D2ARTZR7 implements a precision bandgap-based voltage reference comparator with internal hysteresis and temperature-compensated threshold (60 ppm/°C). Its reset logic asserts active-low RESET when VCC falls below 4.50 V ±2.5% or MR is pulled low, holding output for ≥20 ms after recovery.

It features a debounced manual reset input (1 μs minimum pulse width, 100 ns glitch rejection) and an open-drain RESET output compatible with mixed-voltage systems - capable of sinking up to 3.2 mA while VCC > 4.25 V, and functional down to VCC = 1 V with 80 μA sink capability.

Key Specifications

Pinout & Package

ADM6315-45D2ARTZR7 is housed in a 4-lead SOT-143 package (RA-4), measuring 2.9 mm × 1.5 mm × 1.1 mm, with standard surface-mount footprint and θJA = 330°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US45D2+T and TPS3808G33DBVR, the ADM6315-45D2ARTZR7 uniquely combines 4.5 V supervision, 20 ms timeout, manual reset, open-drain output, and full −40°C to +125°C qualification in a 4-pin SOT-143 - making it optimal for automotive and high-reliability embedded systems where temperature range and interface flexibility are critical.

Availability

ADM6315-45D2ARTZR7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and medical infusion pumps requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for ADM6315-45D2ARTZR7 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-up, brownout, and manual reset behavior in safety-critical and thermally demanding applications.

FAQ

What is the exact reset threshold voltage and tolerance for ADM6315-45D2ARTZR7?

The ADM6315-45D2ARTZR7 has a nominal reset threshold of 4.50 V, with tolerance of ±2.5% over the −40°C to +85°C temperature range and ±3.5% over −40°C to +125°C. This is specified in Table 1 of the Rev. I datasheet under "RESET VOLTAGE THRESHOLD (VTH)" and confirmed in Table 5 of the Ordering Guide. The threshold is internally trimmed and does not require external components.

Does ADM6315-45D2ARTZR7 support manual reset, and what are its timing requirements?

Yes, ADM6315-45D2ARTZR7 includes a debounced manual reset (MR) input. It guarantees acceptance of negative-going pulses ≥1 μs in duration and rejects glitches <100 ns. The MR pin is active-low, with input thresholds defined as 0.3 × VCC (VIL) and 0.7 × VCC (VIH) when VTH < 4 V, per Table 1. No external RC network is required.

What is the minimum reset timeout period for ADM6315-45D2ARTZR7, and how is it affected by temperature?

The ADM6315-45D2ARTZR7 provides a minimum reset timeout of 20 ms at −40°C to +85°C, and 16 ms at −40°C to +125°C, as specified in the "RESET ACTIVE TIMEOUT PERIOD" row for "ADM6315xxD2" in Table 1. The timeout remains stable across temperature due to on-chip compensation, ensuring consistent system initialization timing.

Can ADM6315-45D2ARTZR7 operate with supply voltages below 2.5 V?

Yes, ADM6315-45D2ARTZR7 operates with VCC as low as 1 V, per the "Operating Voltage" specification in Table 1. While its 4.50 V threshold applies to nominal 5 V systems, the device continues asserting RESET down to VCC = 1 V, enabling reliable brownout detection even during severe undervoltage events before complete power loss.

Is ADM6315-45D2ARTZR7 pin-compatible with any other supervisory ICs?

Yes, ADM6315-45D2ARTZR7 is explicitly stated as pin-compatible with the ADM811 in the datasheet Features section. Both share identical 4-lead SOT-143 pinout (GND, RESET, MR, VCC) and open-drain RESET output. However, ADM811 variants differ in trip point and timeout options, so electrical compatibility must be verified per specific use case.