Analog Devices Inc. ADM6315-29D3ARTZR7

Overview

ADM6315-29D3ARTZR7 from Analog Devices is a precision open-drain microprocessor supervisory circuit that monitors 2.93 V supply voltage with ±2.5% accuracy over −40°C to +85°C, provides 140 ms minimum reset timeout, asserts reset down to VCC > 1 V, and consumes only 5 μA typical supply current. It serves as a system-level power integrity guard in embedded controllers requiring reliable brownout detection and manual reset capability.

For engineers reviewing the ADM6315-29D3ARTZR7 datasheet, ADM6315-29D3ARTZR7 pinout, ADM6315-29D3ARTZR7 application, or ADM6315-29D3ARTZR7 equivalent, key selection criteria include its 2.93 V trip point tolerance, 140 ms reset timeout, SOT-143 package footprint, manual reset input immunity to <100 ns glitches, and compatibility with systems operating from 1 V to 5.5 V supply rails.

Technical Context

The ADM6315-29D3ARTZR7 implements a precision bandgap-based voltage reference comparator with temperature-compensated threshold (60 ppm/°C), enabling stable 2.93 V monitoring across −40°C to +125°C. Its internal timing circuit generates a guaranteed minimum 140 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, a debounced manual reset input (MR) with 1 μs minimum pulse width acceptance and 100 ns glitch rejection, and operates with full functionality down to VCC = 1 V - supporting low-voltage microcontroller startup and brownout recovery.

Key Specifications

Pinout & Package

ADM6315-29D3ARTZR7 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 MAX6315US29D3+T and TPS3808G33DBVR, the ADM6315-29D3ARTZR7 uniquely delivers 2.93 V precision monitoring with open-drain output and 1 V operational floor - making it irreplaceable in brownout-critical 2.9 V systems where manual reset integration and ultra-low quiescent current are design constraints.

Availability

ADM6315-29D3ARTZR7 is available at Aetrix Electronics and suitable for automotive body control modules, portable medical monitors, industrial PLC I/O submodules, and railway signaling controllers requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term availability.

Supply support for ADM6315-29D3ARTZR7 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 microprocessor supervisory applications demanding precision voltage thresholds, wide temperature operation, and robust manual reset functionality in space-constrained embedded systems.

FAQ

What is the exact reset threshold voltage of the ADM6315-29D3ARTZR7?

The ADM6315-29D3ARTZR7 has a nominal reset threshold of 2.93 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 specified in Table 1 of the Rev. I datasheet. The ADM6315-29D3ARTZR7 maintains this precision using an internal bandgap reference and temperature compensation circuitry.

Does the ADM6315-29D3ARTZR7 support operation below 2.5 V?

Yes, the ADM6315-29D3ARTZR7 operates fully down to VCC = 1 V, as confirmed in the Absolute Maximum Ratings and Specifications tables. It asserts RESET while VCC remains below 2.93 V and continues functioning - including MR input response and open-drain output drive - even at 1 V, enabling use in deep brownout scenarios where other supervisors fail.

What is the function of Pin 3 (MR) on the ADM6315-29D3ARTZR7?

Pin 3 is the Manual Reset (MR) input - an active-low, debounced signal that forces RESET assertion regardless of VCC level. The ADM6315-29D3ARTZR7 guarantees acceptance of pulses ≥1 μs and rejects glitches <100 ns. When left floating, MR is internally pulled up; no external resistor is required unless noise immunity enhancement is needed via 1 μF decoupling.

Is the ADM6315-29D3ARTZR7 pin-compatible with the ADM811?

Yes, the ADM6315-29D3ARTZR7 is explicitly stated as pin-compatible with the ADM811 in the datasheet Features section. Both devices use the same 4-lead SOT-143 package with identical pin 1 (GND), pin 2 (RESET), pin 3 (MR), and pin 4 (VCC) assignments and electrical behavior - enabling direct replacement where 2.93 V threshold and 140 ms timeout meet system requirements.

What is the minimum reset timeout period for the ADM6315-29D3ARTZR7?

According to Table 5 and the Specifications table, the ADM6315-29D3ARTZR7 has a minimum reset timeout period of 140 ms at −40°C to +85°C and 112 ms at −40°C to +125°C. This guaranteed minimum ensures the RESET signal remains asserted long enough for power supplies and processors to stabilize after power-up or brownout recovery.