Analog Devices Inc./Maxim Integrated MAX6383XR17D2+T

Overview

MAX6383XR17D2+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 1.67V reset threshold (±2.5% over -40°C to +125°C), 20ms minimum reset timeout, and guaranteed valid operation down to VCC = 1V. It monitors single-supply rails in battery-powered embedded systems where precise brownout detection and ultra-low quiescent current (3μA at 1.8V) are critical.

For engineers reviewing the MAX6383XR17D2+T datasheet, MAX6383XR17D2+T pinout, MAX6383XR17D2+T application, or MAX6383XR17D2+T equivalent, key selection criteria include its 1.67V threshold accuracy, 20ms reset delay, SC70-3 package footprint, open-drain output requiring external pullup, and compatibility with 1.8V–5.0V supply domains in portable instrumentation and industrial controllers.

Technical Context

The MAX6383XR17D2+T implements a precision bandgap-based voltage comparator with ±2.5% threshold tolerance across -40°C to +125°C, coupled to a temperature-stable monostable timer that guarantees ≥20ms reset assertion after VCC recovery. Its open-drain RESET output requires an external pullup resistor and remains valid down to VCC = 1V, enabling reliable reset signaling during deep brownout conditions.

No manual reset (MR) input or auxiliary RESET IN comparator is integrated-this variant is optimized for simple single-rail monitoring without user-triggered or dual-voltage supervision. It belongs to the MAX6381–MAX6390 family sharing BiCMOS process, SC70-3/μDFN-6 packaging, and AEC-Q100 qualification options, but excludes MR and RESET IN features present in higher-pin-count variants.

Key Specifications

Pinout & Package

MAX6383XR17D2+T is housed in a 3-pin SC70 package (outline 21-0075, land pattern 90-0208), with pins arranged as follows:

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809TRD2+T, MAX6383XR17D2+T offers open-drain flexibility for shared reset buses but requires an external pullup; versus TPS3808G16DBVR, it trades 0.5% threshold tolerance and 1.5μA current for 40% smaller footprint and proven automotive qualification path.

Availability

MAX6383XR17D2+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply with guaranteed long-term availability.

Supply support for MAX6383XR17D2+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 and mixed-signal ICs for industrial, automotive, communications, and computing markets, with emphasis on power efficiency and reliability.

The MAX6381–MAX6390 family delivers ultra-low-power microprocessor supervisory circuits targeting battery-operated and thermally demanding applications where accurate, predictable reset behavior is non-negotiable.

FAQ

What is the exact reset threshold voltage of MAX6383XR17D2+T and how stable is it over temperature?

The MAX6383XR17D2+T has a factory-set nominal reset threshold of 1.67V, with guaranteed tolerance of ±2.5% over the full operating temperature range of -40°C to +125°C. This stability is achieved through laser-trimmed bandgap references and matched transistor pairs in the BiCMOS process, ensuring consistent brownout detection without external calibration. The MAX6383XR17D2+T maintains this accuracy even during rapid thermal cycling encountered in automotive engine compartments.

Does MAX6383XR17D2+T include a manual reset input (MR) pin?

No, the MAX6383XR17D2+T does not include a manual reset input. It is a minimal-feature variant within the MAX6381–MAX6390 family, designed exclusively for single-rail voltage monitoring with open-drain reset output. Manual reset capability is only present in the 4-pin SC70 and 6-pin μDFN variants such as MAX6384XRxxDx+T and MAX6390XSxxDx+T. The MAX6383XR17D2+T pinout consists solely of RESET, VCC, and GND.

What is the minimum supply voltage at which MAX6383XR17D2+T guarantees correct reset output logic state?

The MAX6383XR17D2+T guarantees valid reset output logic state down to VCC = 1.0V, meaning the open-drain RESET pin will correctly assert low when VCC falls below 1.67V and deassert high (via external pullup) when VCC rises above threshold-even as supply voltage collapses toward battery depletion. This specification is critical for fail-safe operation in energy-harvesting and coin-cell applications. The MAX6383XR17D2+T achieves this via proprietary low-voltage biasing circuitry not found in older reset IC generations.

Can MAX6383XR17D2+T be used in AEC-Q100 qualified automotive designs?

Yes, the MAX6383XR17D2+T is eligible for AEC-Q100 qualification; Maxim Integrated documents AEC-Q100 compliance for the MAX6381–MAX6390 family, with specific /V-trim versions (e.g., MAX6383XR17D2/V+T) undergoing full stress testing. While the base MAX6383XR17D2+T carries RoHS-compliant packaging (+ suffix), automotive-grade validation requires ordering the /V variant. For functional safety requirements, the MAX6383XR17D2+T supports ASIL-B relevant diagnostics via its predictable timeout and threshold behavior, though full ASIL certification requires system-level integration. Always verify latest qualification status with Analog Devices.

What external components are required for proper operation of MAX6383XR17D2+T?

The MAX6383XR17D2+T requires only one external component: a pullup resistor on the open-drain RESET pin, typically 10kΩ to 100kΩ connected to the monitored supply rail (e.g., 3.3V). No capacitors, resistors, or additional ICs are needed for basic supervision. The device integrates all internal references, timing elements, and comparators. Layout best practices include placing the MAX6383XR17D2+T close to the VCC/GND pins of the monitored IC and using a solid ground plane beneath the SC70 package to minimize noise coupling into the sensitive reset comparator input.