Analog Devices Inc./Maxim Integrated MAX6382XR16D3+

Overview

MAX6382XR16D3+ from Maxim Integrated is a 3-pin SC70 packaged microprocessor supervisory circuit with active-high push-pull reset output, factory-set 1.58V reset threshold (±2.5% over -40°C to +125°C), and 140ms minimum reset timeout. It monitors single-supply VCC from +1.8V to +5.0V while drawing only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V. It is used in battery-powered embedded controllers requiring reliable power-on reset and brownout protection.

For engineers reviewing the MAX6382XR16D3+ datasheet, MAX6382XR16D3+ pinout, MAX6382XR16D3+ application, or MAX6382XR16D3+ equivalent, key selection criteria include its 1.58V threshold accuracy, 140ms timeout, SC70 package footprint, active-high push-pull drive capability, and guaranteed operation down to 1V supply - all critical for low-voltage portable and automotive-qualified designs.

Technical Context

The MAX6382XR16D3+ implements a precision bandgap-based voltage comparator monitoring VCC against a fixed 1.58V internal reference, with ±2.5% total accuracy over temperature. Its reset assertion is synchronized to VCC falling edge with 35µs comparator delay, and deassertion is controlled by an internal RC timer calibrated for 140ms minimum timeout after VCC exceeds threshold.

No manual reset (MR) or auxiliary RESET IN inputs are present - this variant is a dedicated single-supply, single-threshold, active-high reset monitor. Its push-pull output drives high during reset and low otherwise, eliminating need for external pullup resistors and supporting direct interface to μP reset pins without level translation.

Key Specifications

Pinout & Package

MAX6382XR16D3+ uses a 3-pin SC70 package (package code X3+2), with pin 1 = RESET (active-high push-pull), pin 2 = VCC, pin 3 = GND. No NC or auxiliary pins - minimal footprint optimized for single-supply reset monitoring.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor reset applications.

Compared with MAX6326XR16D3+, MAX6382XR16D3+ eliminates need for signal inversion; compared with TLV803EB16DBZR, it provides AEC-Q100 qualification and tighter threshold accuracy critical for automotive and industrial deployments.

Availability

MAX6382XR16D3+ is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, industrial PLC I/O submodules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6382XR16D3+ 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

Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, automotive, communications, and computing markets, with emphasis on low-power, high-reliability solutions.

The MAX6381–MAX6390 family delivers single/dual-supply microprocessor supervisory circuits optimized for ultra-low-power, small-footprint reset monitoring in battery-powered and harsh-environment applications.

FAQ

What is the exact reset threshold voltage of MAX6382XR16D3+ and how accurate is it over temperature?

The MAX6382XR16D3+ has a factory-set nominal reset threshold of 1.58V, with guaranteed minimum of 1.54V and maximum of 1.61V at +25°C. Over the full operating range of -40°C to +125°C, the threshold remains within ±2.5% of 1.58V - i.e., 1.54V to 1.62V - ensuring robust brownout detection in automotive and industrial environments where voltage rails fluctuate with temperature.

Does MAX6382XR16D3+ support manual reset functionality?

No, MAX6382XR16D3+ does not include a manual reset (MR) input. It is a dedicated single-supply reset supervisor with only VCC, GND, and active-high RESET pins. Manual reset capability is available only in MAX6384/MAX6385/MAX6386/MAX6390 variants, which feature a fourth pin for MR. For designs requiring manual reset, MAX6384XR16D3+ is the functionally matched alternative in the same SC70-3 package.

Can MAX6382XR16D3+ operate reliably at VCC = 1.0V?

Yes, MAX6382XR16D3+ guarantees correct reset output logic state (high during reset, low otherwise) down to VCC = 1.0V. This ensures deterministic behavior during deep brownout recovery, preventing partial μP execution. However, the reset timeout period is specified only for VCC ≥ 1.8V; at 1.0V, the device remains functional but timing may vary outside datasheet limits.

What is the recommended PCB layout practice for MAX6382XR16D3+ to ensure noise immunity?

Place a 0.1μF ceramic capacitor between VCC and GND as close as possible to the MAX6382XR16D3+ pins to suppress high-frequency transients. Route VCC and GND traces with low inductance; avoid routing noisy signals (e.g., switching regulators, motor drivers) adjacent to the SC70-3 footprint. The device's negative-going VCC transient immunity (per Figure 7) is enhanced by this local decoupling, allowing tolerance of short glitches without false resets.

Is MAX6382XR16D3+ pin-compatible with legacy Maxim reset ICs like MAX809?

Yes, MAX6382XR16D3+ is pin-compatible with MAX809/MAX810/MAX803 in the 3-pin SOT-23 package, but not in SC70-3. While both share identical pinout (VCC, GND, RESET), the SC70-3 package of MAX6382XR16D3+ has different dimensions and thermal characteristics. Direct replacement requires verifying land pattern compatibility and reflow profile - the SC70-3 footprint (land pattern 90-0208) differs from SOT-23.