Analog Devices Inc./Maxim Integrated MAX6375XR31

Overview

MAX6375XR31 from Maxim Integrated is an ultra-low-power, active-low voltage detector in SC70-3 package, with factory-trimmed 3.08V threshold (±2.5% over temperature), 500nA supply current, and push-pull output. It monitors VCC in portable systems and asserts OUT low when supply drops below threshold-used for battery undervoltage lockout in Li+-powered wearables and medical sensors.

For engineers reviewing the MAX6375XR31 datasheet, MAX6375XR31 pinout, MAX6375XR31 application, or MAX6375XR31 equivalent, this device serves as a precision, single-function reset supervisor where minimal quiescent current, guaranteed logic state down to 1V VCC, and transient immunity are critical selection criteria.

Technical Context

The MAX6375XR31 implements a precision bandgap reference and comparator with internally trimmed resistors to set its 3.08V detection threshold. Its push-pull output drives logic directly without external pull-up, and it maintains correct output state across VCC = 1.2V to 5.5V.

Designed for immunity to fast VCC transients, it ignores negative glitches up to 140µs at 20mV overdrive (VTH − VCC), per typical operating characteristics. Propagation delay is 6.3µs (falling) and 9.5µs (rising) over −40°C to +85°C.

Key Specifications

Pinout & Package

MAX6375XR31 is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained portable designs. Pin 1 = GND, Pin 2 = OUT, Pin 3 = VCC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage detector applications.

Compared with TLV803EB30DBZR and APX803S-30SA-7, the MAX6375XR31 uniquely balances ultra-low 500nA current, SC70-3 miniaturization, and push-pull drive - making it optimal for space- and energy-constrained consumer wearables where board area and battery longevity are co-critical.

Availability

MAX6375XR31 is available at Aetrix Electronics and suitable for portable diagnostics, wearable health monitors, and smart sensor nodes requiring stable component supply with long-term lifecycle support.

Supply support for MAX6375XR31 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 power, sensing, and interface applications in industrial, medical, and communications markets.

The MAX6375–MAX6380 family delivers ultra-low-power voltage supervision for battery-powered systems, with factory-trimmed thresholds and minimal external dependencies to simplify design-in and reduce time-to-market.

FAQ

What is the exact factory-trimmed threshold voltage of MAX6375XR31?

The MAX6375XR31 has a nominal threshold voltage of 3.08V, with tolerance of ±2.5% over the full −40°C to +85°C operating temperature range. This value is laser-trimmed at wafer test and confirmed in Table 1 of the datasheet under suffix "R31". The actual measured VTH for a given unit falls between 3.003V (min) and 3.150V (max) at temperature extremes.

Does MAX6375XR31 require an external pull-up resistor on its OUT pin?

No, MAX6375XR31 does not require an external pull-up resistor because it features an active-low push-pull output. The OUT pin can both sink and source current (≥100µA sink, ≥500µA source), enabling direct interfacing with standard CMOS or TTL inputs without additional components - a key advantage over open-drain alternatives like MAX6377XR31.

What is the minimum VCC voltage at which MAX6375XR31 guarantees correct output logic state?

MAX6375XR31 guarantees correct output logic state - i.e., OUT remains low when VCC is below 3.08V and high when above - down to VCC = 1V. This is explicitly stated in the General Description and verified across the full −40°C to +85°C temperature range, supporting robust brownout detection in deeply discharged battery scenarios.

Can MAX6375XR31 be used with a 1.8V supply rail?

Yes, MAX6375XR31 operates reliably with VCC as low as 1.2V and guarantees correct output behavior down to 1V, so it is fully compatible with 1.8V supply rails. However, its 3.08V threshold means it will assert OUT only when that rail drops below 3.08V - making it unsuitable for monitoring 1.8V rails directly. For 1.8V supervision, a lower-threshold variant (e.g., MAX6375XR18) would be required.

What package type and dimensions does MAX6375XR31 use?

MAX6375XR31 uses the SC70-3 package: 2.0mm × 2.1mm body size, 0.95mm maximum height, and 0.65mm lead pitch. Pin 1 is GND (top-left in top view), Pin 2 is OUT (top-right), and Pin 3 is VCC (bottom-center). This package is tape-and-reel only and available in both leaded and lead-free variants (replace "-T" with "+T" for RoHS-compliant ordering).