Analog Devices Inc./Maxim Integrated MAX6377UR24-T

Overview

MAX6377UR24-T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector designed for precision supply monitoring in battery-powered systems. It features a factory-trimmed 2.400V threshold (±2.5% over temperature), 500nA supply current, and operates from 1.2V to 5.5V VCC. It asserts OUT low when VCC falls below threshold and is used in portable equipment power sequencing and Li+-battery undervoltage lockout.

For engineers reviewing the MAX6377UR24-T datasheet, MAX6377UR24-T pinout, MAX6377UR24-T application, or MAX6377UR24-T equivalent, this page delivers verified electrical parameters, SOT23-3 package details, reset timing behavior, transient immunity specs, and validated alternative parts for supply monitoring designs requiring sub-1µA quiescent current and ±2.5% threshold accuracy.

Technical Context

The MAX6377UR24-T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 2.400V detection threshold. Its open-drain output requires an external pull-up and sinks up to 100µA while asserted, enabling flexible logic-level interfacing across 1.2V–5.5V domains.

It guarantees correct output state down to 1V VCC and rejects fast transients via built-in hysteresis (100mV typical) and propagation delay filtering (20µs typical at +25°C). Threshold accuracy is maintained over –40°C to +85°C with ±2.5% tolerance and 40ppm/°C tempco.

Key Specifications

Pinout & Package

MAX6377UR24-T is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), footprint-compatible with SC70-3 but with higher power dissipation rating (320mW at +70°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6377UR24-T, TLV803EB24DBZR offers lower ICC and push-pull drive but sacrifices open-drain interoperability, while APX803S-24SA-7 matches pinout and open-drain function with broader VCC range at modest ICC trade-off - both serve as functional alternatives where design constraints permit.

Availability

MAX6377UR24-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, wearables power sequencing, and smart meter backup circuits requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.

Supply support for MAX6377UR24-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 computing applications.

The MAX6375–MAX6380 family was developed specifically for ultra-low-power supply monitoring in battery-critical systems, emphasizing sub-µA quiescent current, factory-trimmed accuracy, and transient-immune reset generation in minimal 3-pin packages.

FAQ

What is the exact reset threshold voltage of the MAX6377UR24-T?

The MAX6377UR24-T has a factory-trimmed nominal reset threshold of 2.400V, with guaranteed tolerance of ±2.5% over the full operating temperature range (–40°C to +85°C). At +25°C, the typical threshold is 2.400V, and the minimum/maximum values are 2.340V and 2.460V respectively, as specified in Table 1 of the datasheet.

Does the MAX6377UR24-T require an external pull-up resistor on its OUT pin?

Yes, the MAX6377UR24-T features an open-drain active-low output, so an external pull-up resistor is mandatory to establish a valid logic-high state when the output is not asserted. The pull-up can connect to any supply up to 5.5V, and its value must ensure VOL ≤0.4V at ISINK = 100µA while meeting downstream input leakage requirements.

What is the minimum VCC voltage at which the MAX6377UR24-T guarantees correct output logic state?

The MAX6377UR24-T guarantees correct output logic state (i.e., OUT remains low when VCC < V_TH, high otherwise) down to 1.0V VCC. This ensures reliable reset assertion even during deep brownout conditions well below its 2.4V threshold, supporting fail-safe shutdown in low-voltage battery systems.

How does the MAX6377UR24-T handle fast transients on the VCC line?

The MAX6377UR24-T incorporates internal filtering to reject fast negative-going VCC transients. Per the Typical Operating Characteristics graph, it ignores glitches shorter than ~200µs when the overdrive (V_TH – V_CC) is 100mV, increasing immunity as overdrive grows. This prevents false resets caused by switching noise or load transients.

Is the MAX6377UR24-T available in lead-free packaging?

Yes, the MAX6377UR24-T is available in lead-free packaging. To order the lead-free version, replace the "-T" suffix with "+T", resulting in MAX6377UR24+T. Both versions share identical electrical specifications and SOT23-3 mechanical dimensions, with lead-free construction compliant with RoHS directives.