Analog Devices Inc. ADM6315-46D4ARTRL7

Overview

ADM6315-46D4ARTRL7 from Analog Devices is a precision open-drain microprocessor supervisory circuit in SOT-143 package, monitoring 4.63 V supply with ±3.5% threshold accuracy over −40°C to +125°C, asserting reset for minimum 1120 ms after power-up or brownout, and consuming only 5 μA typical supply current. It serves as a system-level voltage monitor and reset generator in embedded controllers requiring reliable power-on and brownout protection.

For engineers reviewing the ADM6315-46D4ARTRL7 datasheet, ADM6315-46D4ARTRL7 pinout, ADM6315-46D4ARTRL7 application, or ADM6315-46D4ARTRL7 equivalent, key selection criteria include its 4.63 V trip point, 1120 ms minimum timeout, open-drain RESET output compatible with mixed-voltage systems, manual reset input with 100 ns glitch rejection, and operation down to VCC > 1 V.

Technical Context

The ADM6315-46D4ARTRL7 implements a precision bandgap-based voltage reference comparator with temperature-compensated threshold (60 ppm/°C), enabling stable 4.63 V detection across automotive-grade temperature range. Its internal timing circuit generates a fixed 1120 ms reset pulse after VCC rises above threshold or MR deasserts.

It features an open-drain RESET output capable of sinking 3.2 mA at VCC > 4.25 V, supporting wired-OR configurations and level-shifting interfaces. The debounced manual reset (MR) input accepts ≥1 μs pulses and rejects transients <100 ns, with internal 63 kΩ pull-up resistance.

Key Specifications

Pinout & Package

ADM6315-46D4ARTRL7 is housed in a 4-lead SOT-143 surface-mount package (RA-4), measuring 2.9 mm × 1.6 mm × 1.15 mm, optimized for space-constrained PCB layouts in automotive and industrial control modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US46D4+T and TPS3808G33DBVR, ADM6315-46D4ARTRL7 uniquely combines 4.63 V precision monitoring, 1120 ms guaranteed timeout, integrated MR pull-up, and sub-10 μA quiescent current - making it optimal for automotive and safety-critical systems requiring long, deterministic reset windows.

Availability

ADM6315-46D4ARTRL7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, medical infusion pump controllers, and railway signaling interface boards requiring stable component supply with extended temperature support and RoHS compliance.

Supply support for ADM6315-46D4ARTRL7 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 designed specifically for robust power-supply monitoring in harsh environments - delivering precision voltage supervision, long reset timeouts, and manual reset capability in minimal SOT-143 footprint.

FAQ

What is the exact reset threshold voltage for ADM6315-46D4ARTRL7?

The ADM6315-46D4ARTRL7 has a nominal reset threshold of 4.63 V, with tolerance of ±3.5% over the full operating temperature range of −40°C to +125°C. This value is factory-trimmed and specified in Table 5 of the datasheet. At 25°C, the threshold is tighter at ±1.8%, and the device maintains accuracy even as VCC falls below 2.5 V - critical for brownout detection in ADM6315-46D4ARTRL7 deployments.

Does ADM6315-46D4ARTRL7 require an external pull-up resistor on the RESET pin?

Yes, ADM6315-46D4ARTRL7 features an open-drain RESET output and requires an external pull-up resistor to the target logic voltage (e.g., 3.3 V or 5 V). The datasheet specifies that RESET can sink up to 3.2 mA when VCC > 4.25 V, so the pull-up value must be selected to ensure proper logic-high voltage under load. No internal pull-up exists on the RESET pin - this is a key distinction from push-pull supervisors like ADM6316.

Can ADM6315-46D4ARTRL7 operate when VCC drops below 2.5 V?

Yes, ADM6315-46D4ARTRL7 remains functional and asserts RESET down to VCC = 1 V, per Absolute Maximum Ratings and General Description. Its internal circuitry continues accurate comparison and timing even during deep brownout events, and RESET output remains valid at 0.3 V with 80 μA sink current. This behavior is explicitly confirmed for ADM6315-46D4ARTRL7 in the "RESET OUTPUT" section of the datasheet.

What is the purpose of the MR pin on ADM6315-46D4ARTRL7, and how should it be used?

The MR (Manual Reset) pin on ADM6315-46D4ARTRL7 is an active-low, debounced input that forces RESET assertion when pulled low for ≥1 μs. It ignores glitches <100 ns and includes an internal 63 kΩ pull-up resistor. When unused, MR may be left floating. For physical buttons, connect a momentary switch between MR and GND; no external pull-up is needed. This feature enables field service reset and safe recovery from software lockup in ADM6315-46D4ARTRL7-based systems.

Is ADM6315-46D4ARTRL7 pin-compatible with other devices in the ADM6315 family?

Yes, all ADM6315 variants - including ADM6315-46D4ARTRL7 - share identical 4-lead SOT-143 (RA-4) pinout: Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC. This uniformity allows direct substitution among trip-point and timeout variants (e.g., ADM6315-46D3ARTZR7 or ADM6315-31D4ARTZR7) without PCB changes, provided system-level timing and voltage thresholds align with the new variant's specifications.