Analog Devices Inc. ADM6315-26D1ARTZR7

Overview

ADM6315-26D1ARTZR7 from Analog Devices is a precision open-drain microprocessor supervisory circuit in SOT-143 package, monitoring 2.63 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 controllers and safety-critical instrumentation.

For engineers reviewing the ADM6315-26D1ARTZR7 datasheet, ADM6315-26D1ARTZR7 pinout, ADM6315-26D1ARTZR7 application, or ADM6315-26D1ARTZR7 equivalent, key selection criteria include reset threshold tolerance, manual reset input compatibility, open-drain output drive capability, and temperature-stable timeout timing across automotive-grade operating range.

Technical Context

The ADM6315-26D1ARTZR7 implements a precision bandgap-based voltage reference comparator with built-in hysteresis and temperature compensation (60 ppm/°C), enabling accurate detection of ≤1.8% supply degradation. Its internal debounced manual reset input rejects transients <100 ns and guarantees response to pulses ≥1 μs.

Reset assertion occurs within 35 μs during VCC fall at 1 mV/μs, and RESET remains active low for a guaranteed minimum 1 ms after VCC rises above 2.63 V or MR returns high - ensuring full system stabilization before processor release.

Key Specifications

Pinout & Package

ADM6315-26D1ARTZR7 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 supervision applications.

Compared with MAX6315US26D3+T and TPS3808G18DBVR, the ADM6315-26D1ARTZR7 uniquely delivers 1 ms reset timing with manual reset support and open-drain flexibility - critical for automotive ECU and safety-critical industrial designs requiring rapid, user-controllable recovery.

Availability

ADM6315-26D1ARTZR7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pump controllers, and railway signaling interface boards requiring stable component supply across extended temperature and long lifecycle programs.

Supply support for ADM6315-26D1ARTZR7 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, low-power microprocessor supervision in harsh environments - emphasizing precision threshold stability, fast transient response, and integrated manual reset functionality.

FAQ

What is the exact reset threshold voltage and tolerance for ADM6315-26D1ARTZR7?

The ADM6315-26D1ARTZR7 has a nominal reset threshold of 2.63 V, with a tolerance of ±2.5% over the −40°C to +85°C temperature range and ±3.5% over −40°C to +125°C. This specification ensures reliable detection of supply droop on 2.7 V rails while maintaining margin against false triggering due to noise or drift. The threshold is factory-trimmed using an internal bandgap reference.

Does ADM6315-26D1ARTZR7 support manual reset, and how is it implemented?

Yes, ADM6315-26D1ARTZR7 includes a dedicated MR (manual reset) pin (Pin 3) that is active-low and internally debounced. It rejects glitches shorter than 100 ns and reliably detects pulses ≥1 μs. When pulled low, MR forces RESET low regardless of VCC level. No external components are required, though a 1 μF capacitor to ground improves noise immunity in electrically noisy environments.

What is the minimum reset timeout period for ADM6315-26D1ARTZR7, and how is it guaranteed?

The ADM6315-26D1ARTZR7 provides a minimum reset timeout of 1 ms after VCC rises above 2.63 V and MR returns high. This is guaranteed across −40°C to +85°C per datasheet Table 1, with worst-case values of 0.8 ms at −40°C to +125°C. The timeout is generated by an internal RC oscillator, independent of external components, ensuring consistent timing without layout dependencies.

Can ADM6315-26D1ARTZR7 operate with supply voltages below 2.63 V and still assert RESET?

Yes, ADM6315-26D1ARTZR7 remains functional and asserts RESET down to VCC = 1 V, as specified in the Absolute Maximum Ratings and Operating Voltage section. This allows it to detect brownout conditions well into battery-depletion scenarios and maintain reset assertion until the monitored rail recovers above 2.63 V, supporting fail-safe behavior in low-energy systems.

Is ADM6315-26D1ARTZR7 pin-compatible with other supervisory ICs, and which ones?

ADM6315-26D1ARTZR7 is explicitly pin-compatible with the ADM811 series per its datasheet Features section. Both share identical SOT-143 pinout (GND, RESET, MR, VCC) and open-drain RESET output. However, threshold voltage and timeout differ: ADM811-26DARTZ specifies 2.63 V threshold but 240 ms timeout, so substitution requires verification of timing requirements in the target design.