Analog Devices Inc. ADM6315-45D1ARTZR7

Overview

ADM6315-45D1ARTZR7 from Analog Devices is a precision open-drain microprocessor supervisory circuit in SOT-143 package, monitoring 4.5 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 ensures reliable power-up/brownout reset for embedded microcontroller systems.

For engineers reviewing the ADM6315-45D1ARTZR7 datasheet, ADM6315-45D1ARTZR7 pinout, ADM6315-45D1ARTZR7 application, or ADM6315-45D1ARTZR7 equivalent, key selection factors include its 4.5 V trip point, 1 ms reset timeout, manual reset input with 100 ns glitch rejection, open-drain RESET output compatible with mixed-voltage systems, and operation down to VCC > 1 V.

Technical Context

The ADM6315-45D1ARTZR7 implements a precision bandgap-based voltage reference comparator with temperature-compensated threshold (60 ppm/°C), enabling stable 4.5 V monitoring across −40°C to +125°C. Its internal timing circuit generates a guaranteed minimum 1 ms active-low 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 and 80 μA down to VCC = 1 V, plus a debounced manual reset input (MR) with 1 μs minimum pulse width acceptance and 100 ns transient immunity - all integrated in a 4-lead SOT-143 footprint.

Key Specifications

Pinout & Package

ADM6315-45D1ARTZR7 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 supervisor applications.

Compared with MAX6315US45D1+T and TPS3808G33DBVR, the ADM6315-45D1ARTZR7 offers tighter threshold accuracy over temperature, integrated manual reset, and lower thermal resistance in SOT-143 - making it optimal for space-constrained automotive and industrial designs requiring deterministic reset behavior.

Availability

ADM6315-45D1ARTZR7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, medical infusion pump controllers, and smart energy meter MCUs requiring stable component supply with guaranteed long-term availability.

Supply support for ADM6315-45D1ARTZR7 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.

The ADM6315 family was designed specifically for robust microprocessor supervision in harsh environments, emphasizing precision threshold stability, low power, and noise-immune manual reset - targeting automotive, industrial, and safety-critical embedded systems.

FAQ

What is the exact reset threshold voltage and tolerance for ADM6315-45D1ARTZR7?

The ADM6315-45D1ARTZR7 has a nominal reset threshold of 4.50 V with ±2.5% tolerance over the −40°C to +85°C temperature range, and ±3.5% over −40°C to +125°C. This specification is confirmed in Table 1 of the Rev. I datasheet under "RESET VOLTAGE THRESHOLD (VTH)" and correlates directly to the "45" in the part number denoting 4.5 V trip point.

Does ADM6315-45D1ARTZR7 support manual reset, and what are its electrical requirements?

Yes, ADM6315-45D1ARTZR7 includes a dedicated MR pin (Pin 3) with guaranteed acceptance of negative-going pulses ≥1 μs and rejection of transients <100 ns. Its input thresholds are 0.8 V (VIL) and 2.4 V (VIH) when VTH > 4 V, matching standard CMOS logic - no external pull-up is required as an internal 32–100 kΩ resistor is provided.

What is the minimum VCC level at which ADM6315-45D1ARTZR7 can still assert RESET?

The ADM6315-45D1ARTZR7 asserts RESET down to VCC > 1 V, as specified in the "Operating Voltage" row of Table 1 (Min = 1 V). Its open-drain RESET output remains functional with 0.3 V max voltage drop at ISINK = 80 μA, enabling reliable reset signaling even during severe brownout conditions.

Is ADM6315-45D1ARTZR7 pin-compatible with other devices in the ADM6315 family or legacy parts?

Yes, ADM6315-45D1ARTZR7 is pin-compatible with all ADM6315 variants in SOT-143 (RA-4) packaging, including ADM6315-31D1ARTZR7 and ADM6315-26D1ARTZR7. It is also explicitly stated as pin-compatible with the ADM811, sharing identical 4-lead SOT-143 pinout and function mapping per datasheet Section "Pin Configuration and Function Descriptions".

What is the thermal performance of ADM6315-45D1ARTZR7 in its SOT-143 package?

ADM6315-45D1ARTZR7 in the 4-lead SOT-143 (RA-4) package has a junction-to-ambient thermal resistance (θJA) of 330°C/W, as documented in Table 3 of the datasheet. This value assumes worst-case PCB mounting conditions and supports continuous operation at full rated current within its −40°C to +125°C junction temperature range.