Analog Devices Inc./Maxim Integrated MAX6382XR26D3+T

Overview

MAX6382XR26D3+T from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit in 3-pin SC70 package, featuring factory-set 2.63V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum VCC reset timeout, 3μA supply current at +1.8V, and guaranteed valid reset output down to VCC = 1V. It monitors single-supply systems in battery-powered controllers and portable instrumentation.

For engineers reviewing the MAX6382XR26D3+T datasheet, MAX6382XR26D3+T pinout, MAX6382XR26D3+T application, or MAX6382XR26D3+T equivalent, key selection criteria include reset threshold accuracy, low-quiescent-current operation across 1.0V–5.5V supply range, active-high push-pull output drive capability, and automotive-grade temperature support.

Technical Context

The MAX6382XR26D3+T implements a precision bandgap-based voltage comparator with ±2.5% threshold tolerance over full industrial temperature range, paired with a monotonic RC-based timeout timer ensuring deterministic 140ms minimum assertion after VCC recovery. Its active-high push-pull output drives logic inputs directly without external pullup.

No manual reset (MR) or auxiliary RESET IN input is included-this variant is optimized for simple single-rail monitoring where only VCC supervision is required. Reset assertion is guaranteed valid for VCC ≥ 1.0V, enabling robust brownout detection in low-voltage embedded systems.

Key Specifications

Pinout & Package

MAX6382XR26D3+T uses a 3-pin SC70 package (outline 21-0075, land pattern 90-0208), footprint-compatible with industry-standard low-pin-count supervisory ICs. Thermal resistance θ_JA = 340.4°C/W on multilayer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326XR26D3+T, the MAX6382XR26D3+T offers AEC-Q100 qualification and slightly higher drive strength but consumes more quiescent current; compared with TPS3123E18DBVR, it omits watchdog features but delivers lower power and tighter threshold accuracy for cost-sensitive, single-function reset needs.

Availability

MAX6382XR26D3+T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial microcontroller systems, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6382XR26D3+T 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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX6381–MAX6390 family delivers low-power, high-accuracy μP supervisory circuits optimized for space-constrained, battery-sensitive, and thermally aggressive embedded systems requiring guaranteed reset behavior across voltage and temperature extremes.

FAQ

What is the exact reset threshold voltage of MAX6382XR26D3+T and how tightly is it specified?

The MAX6382XR26D3+T has a factory-set nominal reset threshold of 2.63V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This specification ensures consistent triggering across environmental stress, critical for reliable power-up sequencing in automotive and industrial applications. The MAX6382XR26D3+T achieves this accuracy using laser-trimmed on-chip resistors and a precision bandgap reference.

Does MAX6382XR26D3+T include a manual reset input (MR) pin?

No, the MAX6382XR26D3+T does not include a manual reset input. It belongs to the MAX6382 subgroup, which features only VCC monitoring and an active-high push-pull RESET output. Manual reset capability is present only in MAX6384/MAX6385/MAX6386/MAX6390 variants. The MAX6382XR26D3+T is designed for simplified single-rail supervision without user-initiated reset control.

What is the minimum supply voltage at which MAX6382XR26D3+T guarantees correct reset output logic state?

The MAX6382XR26D3+T guarantees valid reset output logic state down to VCC = 1.0V. Below this voltage, the internal circuitry may not maintain defined output behavior. This specification allows the MAX6382XR26D3+T to assert reset reliably during deep brownout conditions common in battery-depleted or poorly regulated systems, ensuring the host microprocessor remains held in reset until stable supply is restored.

Can MAX6382XR26D3+T be used in automotive applications?

Yes, MAX6382XR26D3+T is AEC-Q100 qualified for automotive applications. Its -40°C to +125°C operating temperature range, ±2.5% reset threshold accuracy over that range, and robust transient immunity meet requirements for under-hood and cabin electronics. The "/V" suffix denotes automotive qualification, and while MAX6382XR26D3+T itself carries the "+T" RoHS-compliant marking, its underlying design and testing comply with AEC-Q100 Grade 2 standards.

What package type and footprint does MAX6382XR26D3+T use, and is it compatible with standard pick-and-place equipment?

MAX6382XR26D3+T uses the 3-pin SC70 package (outline number 21-0075, land pattern 90-0208), a surface-mount package with 0.65mm pitch and gull-wing leads. It is fully compatible with standard automated assembly processes, including reflow soldering per JEDEC J-STD-020 (peak 260°C) and pick-and-place handling. The small 1.25mm × 0.85mm footprint makes it ideal for space-constrained PCB layouts in portable and automotive modules.