Analog Devices Inc. ADM6315-46D2ARTRL7

Overview

ADM6315-46D2ARTRL7 from Analog Devices is a precision open-drain microprocessor supervisory circuit in SOT-143 package, monitoring 4.63 V supply with ±2.5% threshold accuracy over −40°C to +85°C, 20 ms minimum reset timeout, 5 μA typical supply current, and reset assertion down to VCC > 1 V. It serves as a system-level power-on reset and brownout detector in automotive safety modules.

For engineers reviewing the ADM6315-46D2ARTRL7 datasheet, ADM6315-46D2ARTRL7 pinout, ADM6315-46D2ARTRL7 application, or ADM6315-46D2ARTRL7 equivalent, key selection criteria include reset threshold tolerance, temperature range compliance, manual reset input timing, open-drain output drive capability, and SOT-143 footprint compatibility with space-constrained PCB layouts.

Technical Context

The ADM6315-46D2ARTRL7 implements a precision bandgap-based voltage reference comparator with internal hysteresis and temperature-compensated trip point (60 ppm/°C). Its reset logic asserts active-low RESET for ≥20 ms after VCC rises above 4.63 V or MR falls low, with glitch rejection on MR input (100 ns) and fast 35 μs response to VCC falling at 1 mV/μs.

It features an open-drain RESET output capable of sinking 3.2 mA at VCC > 4.25 V, enabling wired-OR configuration with other reset sources and compatibility with higher-voltage I/O domains. The manual reset input accepts pulses ≥1 μs and includes internal pull-up (32–100 kΩ), eliminating external components in most implementations.

Key Specifications

Pinout & Package

Package: 4-Lead SOT-143 (RA-4), surface-mount, 1.3 mm × 2.9 mm footprint, 330°C/W θJA thermal resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US46D2+T and TPS3808G33DBVR, the ADM6315-46D2ARTRL7 offers tighter threshold accuracy (±2.5% vs ±3.5%), integrated MR pull-up and debounce, and lower typical supply current-making it preferable for automotive and safety-critical designs where component count and long-term stability matter.

Availability

ADM6315-46D2ARTRL7 is available at Aetrix Electronics and suitable for automotive safety systems, industrial PLC controllers, medical infusion pumps, and energy metering modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADM6315-46D2ARTRL7 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 accuracy, wide operating temperature support, and integrated manual reset functionality.

FAQ

What is the exact reset threshold voltage of ADM6315-46D2ARTRL7 and how does it vary with temperature?

The ADM6315-46D2ARTRL7 has a nominal reset threshold of 4.63 V, with tolerance of ±2.5% 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 ≤0.028 V across the full industrial range. This specification is confirmed in Table 1 of the Rev. I datasheet and applies directly to the ADM6315-46D2ARTRL7 variant.

Does ADM6315-46D2ARTRL7 require an external pull-up resistor on the RESET pin?

Yes, ADM6315-46D2ARTRL7 features an open-drain RESET output and requires an external pull-up resistor to the target logic rail (e.g., 3.3 V or 5 V). The datasheet specifies that RESET sinks up to 3.2 mA when asserted at VCC > 4.25 V, so the pull-up value must be selected to ensure valid logic-high levels under load. No internal pull-up exists on the RESET pin of ADM6315-46D2ARTRL7.

Can ADM6315-46D2ARTRL7 operate with supply voltages below 2.5 V?

Yes, ADM6315-46D2ARTRL7 operates with VCC as low as 1 V, and continues asserting RESET until VCC exceeds 4.63 V. Its functional specification explicitly states "Reset assertion down to VCC > 1 V" and confirms operation across 1 V to 5.5 V in the Absolute Maximum Ratings and Supply sections. This behavior is intrinsic to the ADM6315-46D2ARTRL7 design and verified in all temperature ranges.

What is the minimum pulse width required on the MR pin of ADM6315-46D2ARTRL7 to guarantee reset activation?

The MR pin of ADM6315-46D2ARTRL7 requires a minimum low-going pulse width of 1 μs to guarantee recognition, as specified in the "Manual Reset Input" section and Table 1. Pulses shorter than 100 ns are rejected as glitches. This timing is validated across −40°C to +125°C and applies directly to the ADM6315-46D2ARTRL7 part number per the datasheet's Pin Function Descriptions.

Is ADM6315-46D2ARTRL7 pin-compatible with the ADM811?

Yes, ADM6315-46D2ARTRL7 is explicitly stated as pin-compatible with the ADM811 in the datasheet Features section. Both devices use the same 4-lead SOT-143 (RA-4) package with identical pinout: Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC. This compatibility is documented for the entire ADM6315 family, including ADM6315-46D2ARTRL7, and enables drop-in replacement in legacy ADM811 designs.