Analog Devices Inc. ADM6315-45D3ARTRL7

Overview

ADM6315-45D3ARTRL7 from Analog Devices is a precision open-drain microprocessor supervisory circuit designed to monitor 4.5 V supply rails with ±2.5% threshold accuracy over −40°C to +85°C, assert reset for ≥140 ms minimum timeout, consume only 5 μA typical supply current, and support manual reset via debounced MR input - deployed in automotive safety systems requiring reliable brownout detection and system-level power sequencing.

For engineers reviewing the ADM6315-45D3ARTRL7 datasheet, ADM6315-45D3ARTRL7 pinout, ADM6315-45D3ARTRL7 application, or ADM6315-45D3ARTRL7 equivalent, key selection criteria include its 4.5 V trip point, 140 ms minimum reset timeout, SOT-143 package footprint, open-drain RESET output capable of sinking 3.2 mA at VCC > 4.25 V, and guaranteed operation down to VCC = 1 V.

Technical Context

The ADM6315-45D3ARTRL7 integrates a precision voltage reference comparator with temperature-compensated hysteresis (60 ppm/°C), enabling accurate detection of ≤1.8% supply degradation. Its internal timing circuit generates a fixed 140 ms (min) reset pulse after VCC rises above 4.5 V or MR is released.

It features an open-drain RESET output compatible with mixed-voltage systems, a debounced manual reset input rejecting <100 ns glitches while responding reliably to ≥1 μs pulses, and operates across −40°C to +125°C with full specification over −40°C to +85°C.

Key Specifications

Pinout & Package

ADM6315-45D3ARTRL7 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 assembly and thermal performance (θJA = 330°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US45D3+T and TPS3808G33DBVR, ADM6315-45D3ARTRL7 uniquely delivers 4.5 V precision supervision with integrated debounced MR, 140 ms timeout, and 5 μA consumption in SOT-143 - making it optimal for automotive and industrial designs requiring guaranteed reset timing and noise-immune manual intervention.

Availability

ADM6315-45D3ARTRL7 is available at Aetrix Electronics and suitable for automotive safety systems, industrial PLC controllers, portable medical instruments, and telematics control units requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for ADM6315-45D3ARTRL7 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 specifically for robust microprocessor supervision in harsh environments - delivering precision voltage monitoring, temperature-stable reset timing, and noise-immune manual reset in minimal-footprint packages.

FAQ

What is the exact reset threshold voltage of ADM6315-45D3ARTRL7, and how does it vary with temperature?

The ADM6315-45D3ARTRL7 has a nominal reset threshold of 4.50 V, specified with ±2.5% tolerance 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 systems operating across wide ambient ranges like automotive ECUs where consistent brownout detection is mandatory. This behavior is confirmed in Table 1 and Figure 8 of the ADM6315 datasheet Rev. I.

Does ADM6315-45D3ARTRL7 support manual reset, and what are the electrical requirements for the MR pin?

Yes, ADM6315-45D3ARTRL7 includes a debounced manual reset (MR) input that accepts active-low pulses ≥1 μs in duration and rejects glitches <100 ns. When VTH < 4 V, MR logic thresholds are 0.3 × VCC (VIL) and 0.7 × VCC (VIH); internal 63 kΩ pull-up ensures defined state when floating. These specifications ensure reliable reset initiation from mechanical switches or digital outputs without external filtering - a verified feature documented in Table 4 and the Manual Reset Input section of the datasheet.

What is the minimum VCC voltage at which ADM6315-45D3ARTRL7 can still assert RESET?

ADM6315-45D3ARTRL7 guarantees RESET assertion down to VCC > 1 V, as stated in the General Description and Absolute Maximum Ratings sections. At VCC = 1 V, it can sink 80 μA on the RESET output while maintaining valid logic levels - enabling fail-safe reset generation even during severe brownout or battery-depletion scenarios. This capability is explicitly tested and specified in the RESET OUTPUT section of Table 1.

Is ADM6315-45D3ARTRL7 pin-compatible with other supervisory ICs, and which ones?

ADM6315-45D3ARTRL7 is pin-compatible with the ADM811 series in the same SOT-143 package, sharing identical pinout (GND, RESET, MR, VCC) and functional mapping. This compatibility is explicitly stated in the FEATURES section and validated in Pin Configuration Figure 3. No PCB layout changes are required when migrating from ADM811-45D3ARTZ to ADM6315-45D3ARTRL7, provided timing and threshold requirements align.

What are the thermal characteristics of ADM6315-45D3ARTRL7, and how do they affect PCB layout?

ADM6315-45D3ARTRL7 in SOT-143 (RA-4) has a junction-to-ambient thermal resistance θJA of 330°C/W under worst-case PCB conditions. To maintain reliability at maximum ambient temperature (+125°C), designers must limit power dissipation - with typical 5 μA supply current at 5.5 V yielding only 27.5 μW - making thermal derating negligible. The datasheet recommends standard SOT-143 land patterns per Package Index for optimal solder joint integrity and thermal transfer.