Analog Devices Inc. ADM6315-44D4ARTZR7

Overview

ADM6315-44D4ARTZR7 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, delivering 1120 ms minimum reset timeout, and consuming only 5 μA typical supply current. It ensures reliable power-up, brownout, and manual reset for embedded microprocessor systems.

For engineers reviewing the ADM6315-44D4ARTZR7 datasheet, ADM6315-44D4ARTZR7 pinout, ADM6315-44D4ARTZR7 application, or ADM6315-44D4ARTZR7 equivalent, key selection criteria include reset threshold tolerance, temperature range compliance, open-drain output drive capability, manual reset debounce timing, and SOT-143 footprint compatibility with space-constrained PCB layouts.

Technical Context

The ADM6315-44D4ARTZR7 implements a precision bandgap-based voltage reference comparator with built-in hysteresis and temperature compensation (60 ppm/°C), enabling stable 4.39 V trip point detection across automotive-grade temperature range. Its internal reset timer guarantees ≥1120 ms assertion after VCC rise or MR deassertion.

It features a debounced active-low 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 while asserting low down to VCC = 1 V - supporting interoperability with higher-voltage logic domains.

Key Specifications

Pinout & Package

ADM6315-44D4ARTZR7 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 surface-mount 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 MAX6315US43D4-T and TPS3808G33DBVR, the ADM6315-44D4ARTZR7 uniquely delivers 4.39 V precision monitoring with guaranteed operation up to +125°C and integrated debounced MR - making it the sole option among the three qualified for automotive AEC-Q100-relevant thermal profiles and safety-critical manual intervention.

Availability

ADM6315-44D4ARTZR7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, medical infusion pump controllers, and railway signaling interface boards requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADM6315-44D4ARTZR7 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, Inc. 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, wide temperature operation, and noise-immune reset generation for mission-critical embedded systems.

FAQ

What is the exact reset threshold voltage of ADM6315-44D4ARTZR7 and how does it vary with temperature?

The ADM6315-44D4ARTZR7 has a nominal reset threshold of 4.39 V, with tolerance of ±3.5% over the full −40°C to +125°C operating range. At 25°C, the threshold is tighter at ±1.8%. Its temperature coefficient is 60 ppm/°C, meaning drift is predictable and bounded - critical for designs requiring deterministic reset behavior across thermal extremes. This specification is confirmed in Table 1 of the Rev. I datasheet.

Does ADM6315-44D4ARTZR7 support manual reset, and what are its electrical requirements?

Yes, ADM6315-44D4ARTZR7 includes a dedicated MR (Manual Reset) pin (Pin 3) that accepts active-low signals. Its input thresholds scale with VCC: VIL ≤ 0.3 × VCC and VIH ≥ 0.7 × VCC. It rejects glitches <100 ns and reliably detects pulses ≥1 μs. When unused, MR must be left floating - no external pull-up is required due to internal 32–100 kΩ pull-up. This behavior is documented in Table 1 and Pin Function Descriptions.

What is the minimum reset timeout period for ADM6315-44D4ARTZR7, and is it guaranteed across temperature?

The ADM6315-44D4ARTZR7 provides a minimum reset timeout of 1120 ms at −40°C to +85°C and 896 ms at −40°C to +125°C. These values are production-guaranteed minima - actual timeout may extend up to 2240 ms at +85°C and 2688 ms at +125°C. The timeout begins after VCC rises above threshold *and* MR goes high, ensuring synchronized release of downstream logic. This is specified in Table 1 under "RESET ACTIVE TIMEOUT PERIOD" for "ADM6315xxD4" variant.

Can ADM6315-44D4ARTZR7 operate below 2.5 V, and what happens to reset assertion?

Yes, ADM6315-44D4ARTZR7 operates down to VCC = 1 V and continues asserting RESET low until VCC exceeds 4.39 V (±3.5%). Its internal circuitry remains functional and maintains reset state even during deep brownout - unlike many supervisors that disable below 2.5 V. The RESET output can sink 80 μA at VCC = 1 V, ensuring reliable logic-level hold. This capability is explicitly stated in the "Operating Voltage" row of Table 1 and General Description.

Is ADM6315-44D4ARTZR7 pin-compatible with other devices in the ADM6315 family or industry alternatives?

ADM6315-44D4ARTZR7 is pin-compatible with all ADM6315 variants in SOT-143 (RA-4) package, including ADM6315-31D4ARTZR7 and ADM6315-26D4ARTZR7. It is also pin-compatible with the ADM811, as noted in the Features section. However, it is *not* pin-compatible with MAX6315 or TPS3808 series due to differing pin counts (e.g., SOT-23-5) and incompatible MR/RESET pin assignments. Always verify package outline and land pattern per RA-4 drawing.