Analog Devices Inc./Maxim Integrated MAX6376XR29-T

Overview

MAX6376XR29-T from Maxim Integrated is an ultra-low-power, active-high push-pull voltage detector IC designed for precision supply monitoring in battery-powered systems. It features a factory-trimmed 2.93V threshold (±2.5% over temperature), 500nA supply current, and guaranteed operation down to 1V VCC. It asserts a logic-high output when VCC falls below threshold, enabling reliable reset or power-fail signaling in portable medical devices and wearables.

For engineers reviewing the MAX6376XR29-T datasheet, MAX6376XR29-T pinout, MAX6376XR29-T application, or MAX6376XR29-T equivalent, key selection criteria include its active-high push-pull output configuration, SC70-3 package footprint, 2.93V trip point with ±2.5% accuracy, and immunity to sub-20µs VCC transients at typical overdrive conditions.

Technical Context

The MAX6376XR29-T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 2.93V detection threshold. Its push-pull output drives high (VOH ≥ 0.8×VCC) when VCC drops below VTH and low (VOL ≤ 0.4V) otherwise, eliminating external pull-up components. The device operates across -40°C to +85°C with no external calibration required.

It achieves 500nA quiescent current via optimized CMOS design and includes built-in hysteresis (100mV typ.) to prevent chatter during slow VCC decay. Propagation delay is 6.3µs (typ.) for falling-edge detection, and the circuit rejects transients shorter than 20µs when VCC undershoots VTH by ≥100mV.

Key Specifications

Pinout & Package

MAX6376XR29-T is housed in a 3-pin SC70-3 package (2.0mm × 1.25mm × 0.95mm), compatible with high-density PCB layouts and reflow soldering. 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 TLV803EB29DPWR and APX803S-29SA-7, MAX6376XR29-T uniquely combines SC70-3 size, 500nA current, and active-high push-pull output-enabling direct MCU reset interface without layout changes or current penalty.

Availability

MAX6376XR29-T is available at Aetrix Electronics and suitable for battery-powered medical sensors, portable diagnostic handhelds, and industrial wireless sensor nodes requiring stable component supply and long-term lifecycle support.

Supply support for MAX6376XR29-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) is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, and interface applications.

The MAX6375–MAX6380 family was designed specifically for ultra-low-power voltage monitoring in space-constrained, battery-critical systems-emphasizing precision, minimal current draw, and zero-component integration.

FAQ

What is the exact reset threshold voltage of the MAX6376XR29-T?

The MAX6376XR29-T has a factory-trimmed nominal reset threshold of 2.93V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +85°C). This value is confirmed in Table 1 of the datasheet and applies specifically to the R29 suffix variant. The MAX6376XR29-T does not require external adjustment to achieve this specification.

Does the MAX6376XR29-T require an external pull-up resistor on its output?

No, the MAX6376XR29-T features an active-high push-pull output that actively drives both high and low states. It sources up to 500µA and sinks up to 1.2mA, allowing direct connection to standard CMOS reset inputs without any external pull-up resistor. This is a key differentiator from open-drain alternatives like the MAX6377 series.

What package type is used for the MAX6376XR29-T?

The MAX6376XR29-T is supplied in a 3-pin SC70-3 package (2.0mm × 1.25mm × 0.95mm), identified by the "XR" prefix in the part number. This ultra-compact outline supports high-density PCB layouts and is distinct from the SOT23-3 option used in the "UR" variants. Pin 1 is GND, Pin 2 is OUT, and Pin 3 is VCC.

Can the MAX6376XR29-T operate reliably below 1.8V VCC?

Yes, the MAX6376XR29-T is fully specified to operate down to 1.2V VCC and guarantees correct output logic state (high when VCC < VTH) down to 1.0V. This capability enables use in deeply discharged battery scenarios and multi-cell configurations where rail collapse occurs gradually. Performance parameters such as propagation delay and threshold accuracy remain valid across the entire 1.2V–5.5V range.

How does the MAX6376XR29-T handle fast voltage transients on the VCC line?

The MAX6376XR29-T incorporates internal filtering to reject fast negative-going VCC transients. According to the Typical Operating Characteristics graph (Figure MAX6375-04), it ignores glitches shorter than ~20µs when VCC undershoots the 2.93V threshold by 100mV or more. This transient immunity prevents spurious resets in electrically noisy environments such as motor-driven or RF-intensive applications.