Analog Devices Inc./Maxim Integrated MAX6377XR28

Overview

MAX6377XR28 from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector with a factory-trimmed threshold of 2.800V ±2.5% over temperature, 500nA supply current, and operation down to 1V VCC. It monitors battery or regulated supply voltage in portable systems and asserts OUT low when VCC falls below the threshold.

For engineers reviewing the MAX6377XR28 datasheet, MAX6377XR28 pinout, MAX6377XR28 application, or MAX6377XR28 equivalent, this device serves as a precision reset supervisor for low-voltage microcontrollers, battery-powered sensors, and power-sequencing circuits where minimal quiescent current and transient immunity are critical.

Technical Context

The MAX6377XR28 integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to set its 2.800V detection threshold without external components. Its open-drain output requires an external pull-up and sinks up to 100µA while asserted.

Designed for immunity to fast VCC transients, it ignores negative-going glitches shorter than ~120µs at 200mV overdrive and guarantees correct logic state down to 1V supply. Propagation delay is 6.3µs (typ) with ±2.5% threshold accuracy across –40°C to +85°C.

Key Specifications

Pinout & Package

MAX6377XR28 is housed in a 3-pin SC70 package (2.0mm × 1.25mm × 0.95mm), optimized for space-constrained portable PCBs. Pin 1 = GND, Pin 2 = OUT (open-drain), Pin 3 = VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB28DBZR and APX803S-28SA-7, the MAX6377XR28 uniquely balances ultra-low 500nA ICC, open-drain flexibility for mixed-voltage systems, and guaranteed 1V operation-making it optimal for long-life, multi-rail portable designs where both power and interface versatility matter.

Availability

MAX6377XR28 is available at Aetrix Electronics and suitable for precision battery monitoring, load switching/power sequencing, and power-supply monitoring in digital/analog systems requiring stable component supply and long-term lifecycle support.

Supply support for MAX6377XR28 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 high-performance analog and mixed-signal ICs for power, sensing, and connectivity applications, with emphasis on reliability and integration.

The MAX6375–MAX6380 family delivers ultra-low-power voltage supervision for portable and battery-critical systems, targeting applications where nanoscale current budget and small footprint are non-negotiable design constraints.

FAQ

What is the exact factory-trimmed threshold voltage of MAX6377XR28?

The MAX6377XR28 has a nominal reset threshold of 2.800V, with ±2.5% accuracy over the full –40°C to +85°C operating temperature range. At +25°C, the typical threshold is 2.800V, with min/max limits of 2.730V and 2.870V respectively per the datasheet's Table 1.

Does MAX6377XR28 require an external pull-up resistor on the OUT pin?

Yes, MAX6377XR28 features an open-drain output and requires an external pull-up resistor connected between OUT and any logic supply up to 5.5V. The resistor value must ensure VOL ≤0.4V at ISINK = 100µA while providing sufficient drive for downstream inputs.

Can MAX6377XR28 operate reliably below 1.2V VCC?

No-while MAX6377XR28 guarantees correct output logic state down to 1V VCC, its specified operating range begins at 1.2V. Below 1.2V, functionality is not characterized; the 1V guarantee applies only to maintaining defined output polarity during deep brown-out, not full specification compliance.

What is the maximum transient duration that MAX6377XR28 can ignore at 200mV overdrive?

At a threshold overdrive (VTH – VCC) of 200mV, MAX6377XR28 ignores negative-going VCC transients up to approximately 120µs, as shown in Figure MAX6375-04 of the datasheet. This immunity prevents false resets during switching regulator noise or load-dump events.

Is MAX6377XR28 available in lead-free packaging?

Yes, MAX6377XR28 is available in lead-free packaging. To order the RoHS-compliant version, replace the "-T" suffix with "+T" (e.g., MAX6377XR28+T), per Maxim's ordering convention. Both leaded and lead-free variants share identical electrical and thermal specifications.