Analog Devices Inc./Maxim Integrated MAX6388XS23D6-T

Overview

MAX6388XS23D6-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.31V VCC reset threshold (±2.5% over -40°C to +125°C), 560ms minimum reset timeout, and auxiliary RESET IN input for dual-voltage monitoring. It consumes only 3μA at +1.8V and guarantees valid reset state down to VCC = 1V, used in battery-powered instrumentation and industrial controllers requiring reliable power-on reset and brownout protection.

For engineers reviewing the MAX6388XS23D6-T datasheet, MAX6388XS23D6-T pinout, MAX6388XS23D6-T application, or MAX6388XS23D6-T equivalent, key selection criteria include its 2.31V threshold accuracy, 560ms VCC timeout, 4-pin SC70 package, RESET IN comparator interface, and compatibility with dual-rail systems where core and I/O supplies must be independently monitored.

Technical Context

The MAX6388XS23D6-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.31V threshold, while its auxiliary RESET IN pin compares an external voltage to an internal 1.27V reference-enabling independent monitoring of a second supply rail. Its reset assertion logic triggers on either VCC or RESET IN falling below their respective thresholds.

It features a digitally controlled timeout timer that holds the active-high RESET output asserted for ≥560ms after VCC or RESET IN recovers, with guaranteed reset deassertion timing across -40°C to +125°C. The push-pull output drives high during reset and low otherwise, eliminating need for external pullup resistors.

Key Specifications

Pinout & Package

MAX6388XS23D6-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), featuring compact 1.6mm × 1.6mm body and 0.65mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6388XS23D6-T, the μDFN variant offers identical functionality in a thermally superior but physically larger package, while TLV809K23DBZR reduces cost and size at the expense of dual-supply monitoring and slightly tighter threshold tolerance.

Availability

MAX6388XS23D6-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial controller power monitoring, dual-voltage microcontroller systems, and automotive body control modules requiring stable component supply and long-term production continuity.

Supply support for MAX6388XS23D6-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.

The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for microprocessor-based systems operating under wide voltage and temperature ranges, with emphasis on dual-supply monitoring and automotive-grade reliability.

FAQ

What is the exact reset threshold voltage of MAX6388XS23D6-T and how stable is it over temperature?

The MAX6388XS23D6-T has a factory-set VCC reset threshold of 2.31V, specified as ±2.5% over the full operating temperature range of -40°C to +125°C. This stability is achieved using a precision bandgap reference and laser-trimmed resistors, ensuring consistent brownout detection without external calibration. The MAX6388XS23D6-T maintains this accuracy across automotive and industrial environments where supply rails may drift significantly with temperature.

Does MAX6388XS23D6-T support monitoring of two independent power supplies?

Yes, the MAX6388XS23D6-T supports dual-supply monitoring: VCC is monitored against its fixed 2.31V threshold, while the RESET IN pin compares an external voltage to an internal 1.27V reference. By connecting a resistor divider to RESET IN, users can set a custom threshold for a second supply rail-enabling coordinated reset assertion if either rail fails. This capability is explicitly confirmed in the MAX6388XS23D6-T's pin description and typical operating circuit.

What is the function of the RESET output on MAX6388XS23D6-T and what drive strength does it provide?

The RESET output of MAX6388XS23D6-T is an active-high push-pull driver, meaning it actively drives high during reset and low otherwise-no external pullup resistor is required. It sources up to 800µA at VCC ≥ 4.5V and sinks up to 3.2mA when asserted, ensuring robust interfacing with standard microprocessor reset inputs. This output remains valid down to VCC = 1V, guaranteeing deterministic behavior during deep brownout conditions.

How does the 560ms reset timeout of MAX6388XS23D6-T benefit system startup reliability?

The 560ms minimum reset timeout of MAX6388XS23D6-T ensures the microprocessor remains held in reset long enough for all power supplies to stabilize, clocks to settle, and internal registers to initialize-critical for complex SoCs and FPGAs. This timeout is guaranteed over temperature and supply voltage, eliminating race conditions during power-up. In practice, the MAX6388XS23D6-T prevents premature code execution that could corrupt memory or peripherals during marginal supply conditions.

Is MAX6388XS23D6-T qualified for automotive applications and what package options exist?

The MAX6388XS23D6-T is RoHS-compliant and operates over -40°C to +125°C, but it is not explicitly AEC-Q100 qualified-only specific /V-trim versions (e.g., MAX6388XS23D6/V+T) carry automotive qualification. It is offered exclusively in the 4-pin SC70 package (X4+1 outline). No μDFN or SC70-3 variants exist for this specific suffix combination; alternative packages require different part numbers such as MAX6388LT23D6-T.