Analog Devices Inc. ADM6315-44D4ARTZRL

Overview

ADM6315-44D4ARTZRL from Analog Devices is a precision open-drain microprocessor supervisory circuit in SOT-143 package, monitoring 4.39 V supply with ±3.5% threshold accuracy over −40°C to +125°C, providing 1120 ms minimum reset timeout, 5 μA typical supply current, and manual reset input with 100 ns glitch rejection - used for reliable power-up/brownout protection in automotive safety systems.

For engineers reviewing the ADM6315-44D4ARTZRL datasheet, ADM6315-44D4ARTZRL pinout, ADM6315-44D4ARTZRL application, or ADM6315-44D4ARTZRL equivalent, key selection criteria include reset threshold tolerance at extended temperature, open-drain output compatibility with higher-voltage logic domains, manual reset pulse width requirements, and SOT-143 footprint constraints in space-constrained embedded controllers.

Technical Context

The ADM6315-44D4ARTZRL implements a precision bandgap-based voltage reference comparator with internal hysteresis and temperature-compensated trip point (60 ppm/°C), enabling stable 4.39 V monitoring across industrial and automotive temperature ranges. Its reset assertion occurs within 35 μs during VCC fall at 1 mV/μs, and the open-drain RESET output supports sinking up to 3.2 mA at VCC > 4.25 V.

It integrates a debounced manual reset input (MR) with guaranteed 1 μs minimum pulse acceptance and 100 ns transient immunity, plus internal pull-up resistance (32–100 kΩ) on MR. The device asserts reset down to VCC > 1 V and maintains reset for ≥1120 ms after VCC rises above threshold and MR goes high.

Key Specifications

Pinout & Package

ADM6315-44D4ARTZRL 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 and exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US44D4+T and TPS3808G33DBVR, ADM6315-44D4ARTZRL offers tighter threshold accuracy over temperature, lower power, true manual reset capability, and open-drain flexibility - making it preferred for automotive, industrial, and safety-critical applications demanding robust brownout response and mixed-voltage interfacing.

Availability

ADM6315-44D4ARTZRL is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, medical infusion pump controllers, and railway signaling interface boards requiring stable component supply across extended temperature and long product lifecycles.

Supply support for ADM6315-44D4ARTZRL 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.

The ADM6315 family was designed specifically for robust power-supply monitoring in harsh environments - targeting automotive, industrial, and safety-critical systems where accurate, low-power, and temperature-stable reset generation is essential.

FAQ

What is the exact reset threshold voltage of ADM6315-44D4ARTZRL and how does it vary with temperature?

The ADM6315-44D4ARTZRL has a nominal reset threshold of 4.39 V, with tolerance of ±3.5% over −40°C to +125°C. Its temperature coefficient is 60 ppm/°C, meaning threshold drift is ≤0.026 V across the full range. This is verified in Table 1 of the Rev. I datasheet under "RESET VOLTAGE THRESHOLD" and confirmed in Figure 8 ("Normalized Reset Threshold vs. Temperature"). The specification ensures predictable behavior in automotive under-hood applications where ambient temperature swings exceed 160°C.

Does ADM6315-44D4ARTZRL support manual reset, and what are the electrical requirements for the MR pin?

Yes, ADM6315-44D4ARTZRL includes a debounced manual reset (MR) input. MR is active-low with input thresholds defined as 0.3 × VCC (VIL) and 0.7 × VCC (VIH) when VTH < 4 V - applicable here since 4.39 V > 4 V, so VIL = 0.8 V and VIH = 2.4 V. It rejects glitches <100 ns and requires ≥1 μs pulse width. Internal pull-up (32–100 kΩ) allows direct switch-to-ground connection without external components. These values are specified in Table 1 under "MANUAL RESET".

What is the minimum reset timeout period for ADM6315-44D4ARTZRL, and is it guaranteed across temperature?

The ADM6315-44D4ARTZRL guarantees a minimum reset timeout of 1120 ms at −40°C to +85°C and 896 ms at −40°C to +125°C, per Table 1 "RESET ACTIVE TIMEOUT PERIOD" for variant ADM6315xxD4. This is the duration RESET remains low after VCC rises above 4.39 V and MR goes high. The timeout is internally generated and temperature-compensated, ensuring reliable hold time for slow-ramping power supplies in industrial and automotive systems.

Can ADM6315-44D4ARTZRL's RESET output interface directly with a 12 V logic rail?

Yes, ADM6315-44D4ARTZRL features an open-drain RESET output, allowing direct connection to any positive voltage rail up to 12 V via an external pull-up resistor. The output sinks up to 3.2 mA when VCC > 4.25 V (per Table 1), and leakage is ≤1 μA when deasserted. This architecture eliminates level shifters and supports mixed-voltage systems - explicitly stated in the "THEORY OF OPERATION" section under "INTERFACING TO OUTPUT OF OTHER DEVICES".

Is ADM6315-44D4ARTZRL pin-compatible with other devices in the ADM6315 family or with the ADM811?

Yes, ADM6315-44D4ARTZRL is pin-compatible with all ADM6315 variants in SOT-143 (RA-4) package and with the ADM811 series, as confirmed in the "FEATURES" list and "PIN CONFIGURATION" section. Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC across all variants. This allows drop-in replacement within the same package footprint when adjusting reset threshold or timeout - provided the application tolerates the specific 4.39 V / 1120 ms configuration.