Analog Devices Inc. ADM6315-45D2ARTRL7

Overview

ADM6315-45D2ARTRL7 from Analog Devices is a precision open-drain microprocessor supervisory circuit in SOT-143 package, monitoring 4.50 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 - used for reliable power-up/brownout detection in automotive safety systems.

For engineers reviewing the ADM6315-45D2ARTRL7 datasheet, ADM6315-45D2ARTRL7 pinout, ADM6315-45D2ARTRL7 application, or ADM6315-45D2ARTRL7 equivalent, key selection criteria include trip point tolerance, temperature range (−40°C to +125°C), manual reset input compatibility, open-drain RESET output drive capability, and SOT-143 footprint constraints.

Technical Context

The ADM6315-45D2ARTRL7 implements a precision bandgap-based voltage reference comparator with built-in hysteresis and temperature-compensated threshold (60 ppm/°C), enabling accurate detection of 1.8% supply degradation. Its internal timing circuit generates a guaranteed minimum 20 ms reset pulse after VCC rises above 4.50 V or MR deasserts.

It features a debounced manual reset input (MR) with 100 ns glitch rejection and ≥1 μs pulse acceptance, plus an open-drain RESET output capable of sinking 3.2 mA at VCC > 4.25 V - allowing direct interfacing with higher-voltage logic or pull-up networks independent of VCC.

Key Specifications

Pinout & Package

ADM6315-45D2ARTRL7 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 MAX6315US45D2+T and TPS3808G33DBVR, ADM6315-45D2ARTRL7 offers optimal balance of 4.5 V precision, ultra-low ICC, open-drain flexibility, and AEC-Q200-aligned temperature range - making it preferred for automotive and industrial 5 V systems where layout reuse and proven reliability are critical.

Availability

ADM6315-45D2ARTRL7 is available at Aetrix Electronics and suitable for automotive safety systems, industrial PLC controllers, portable medical instruments, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADM6315-45D2ARTRL7 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 temperature operation, and noise-immune manual reset functionality.

FAQ

What is the exact reset threshold voltage and tolerance for ADM6315-45D2ARTRL7?

The ADM6315-45D2ARTRL7 has a nominal reset threshold of 4.50 V, with tolerance of ±2.5% over the −40°C to +85°C temperature range and ±3.5% over −40°C to +125°C. This is specified in Table 1 of the Rev. I datasheet and confirmed by the Ordering Guide and Trip Point Options table, where "45" denotes 4.50 V and "D2" selects the 20 ms timeout variant. The threshold is derived from an internal bandgap reference with 60 ppm/°C temperature coefficient.

Does ADM6315-45D2ARTRL7 support manual reset, and what are its electrical requirements?

Yes, ADM6315-45D2ARTRL7 includes a dedicated MR (Manual Reset) input (Pin 3) that is active-low and internally debounced. It accepts input pulses ≥1 μs in duration, rejects glitches <100 ns, and has input thresholds of 0.3 × VCC (VIL) and 0.7 × VCC (VIH) when VTH < 4 V. A pull-up resistor is not required, but a 1 μF capacitor to ground improves noise immunity in noisy environments. The MR function is fully documented in the Functional Block Diagram and Pin Function Descriptions.

What is the RESET output type of ADM6315-45D2ARTRL7, and how should it be interfaced?

ADM6315-45D2ARTRL7 features an open-drain RESET output (Pin 2), which remains low during reset assertion and floats (high-impedance) when deasserted. It must be pulled up externally to a logic-compatible voltage (e.g., 3.3 V or 5 V). The output can sink up to 3.2 mA when VCC > 4.25 V, enabling direct interface with multiple logic families. This architecture allows level-shifting and wired-OR configurations - a key advantage over push-pull alternatives like the TPS3808 series.

Is ADM6315-45D2ARTRL7 pin-compatible with any other supervisory ICs?

Yes, ADM6315-45D2ARTRL7 is explicitly stated as pin-compatible with the ADM811 in the Features section of the datasheet. Both devices share identical 4-lead SOT-143 (RA-4) pinout: GND (Pin 1), RESET (Pin 2), MR (Pin 3), and VCC (Pin 4). However, ADM811 variants differ in trip point and timeout options, so functional equivalence requires matching those parameters - ADM6315-45D2ARTRL7 is not a drop-in replacement for ADM811-45D2ARTZ unless the target board uses the same 4.5 V/20 ms configuration.

What is the minimum VCC voltage at which ADM6315-45D2ARTRL7 can still assert RESET?

ADM6315-45D2ARTRL7 guarantees RESET assertion down to VCC > 1 V, as stated in the General Description and confirmed in the Absolute Maximum Ratings table (operating voltage range: 1 V to 5.5 V). This capability enables reliable brownout detection even during severe undervoltage events - for example, during automotive cold-crank where battery voltage may dip below 2.5 V. The RESET output remains functional and can sink 80 μA at VCC > 1 V, ensuring compatibility with low-voltage logic interfaces.