Analog Devices Inc./Maxim Integrated MAX6378XR35

Overview

MAX6378XR35 from Maxim Integrated is an ultra-low-power, active-low voltage detector with factory-trimmed 3.50V threshold, push-pull output, ±2.5% accuracy over temperature, and 500nA supply current - used for precision power-supply monitoring in battery-powered microcontroller systems where reliable reset assertion below VTH is critical.

For engineers reviewing the MAX6378XR35 datasheet, MAX6378XR35 pinout, MAX6378XR35 application, or MAX6378XR35 equivalent, this device serves as a space-constrained, low-quiescent-current supervisor for 3.3V/3.6V rail monitoring, requiring accurate trip point, transient immunity, and guaranteed logic state down to 1V VCC.

Technical Context

The MAX6378XR35 integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver a fixed 3.50V detection threshold with ±2.5% tolerance across –40°C to +85°C. It asserts an active-low push-pull output (OUT) when VCC falls below VTH, maintaining valid logic state down to 1V supply.

Designed for immunity to fast VCC transients, it features 9.5µs propagation delay (rising edge), 20µs max transient rejection window at 100mV overdrive, and hysteresis of 0.1mV - enabling robust operation in noisy portable environments without external components or trimming.

Key Specifications

Pinout & Package

MAX6378XR35 is housed in a 3-pin SC70 package (2.0mm × 1.25mm × 0.95mm), optimized for high-density PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EC35DBZR and TPS3808G33DBVR, the MAX6378XR35 delivers optimal balance of ultra-low ICC, fixed 3.50V accuracy, push-pull simplicity, and SC70 size - making it ideal for cost- and space-constrained battery-monitoring nodes where minimal external components and guaranteed 1V operation are mandatory.

Availability

MAX6378XR35 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart meter battery backup systems requiring stable component supply, long-lifecycle support, and tape-and-reel delivery for automated assembly.

Supply support for MAX6378XR35 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 engineered specifically for ultra-low-power voltage supervision in space- and energy-constrained systems - delivering factory-trimmed accuracy, minimal external dependencies, and guaranteed operation across wide VCC and temperature ranges.

FAQ

What is the exact factory-trimmed threshold voltage of the MAX6378XR35?

The MAX6378XR35 has a nominal threshold voltage of 3.50V, with a tolerance of ±2.5% over the full –40°C to +85°C operating temperature range. This value is laser-trimmed at wafer test and verified per Electrical Characteristics table; the "R35" suffix explicitly denotes the 3.50V variant within the MAX6378 series.

Does the MAX6378XR35 require any external components to function?

No, the MAX6378XR35 requires no external components. Its precision bandgap reference, comparator, and factory-trimmed resistive divider are fully integrated. The push-pull output eliminates the need for a pull-up resistor, and the device operates correctly with only VCC, GND, and OUT connections - simplifying layout and reducing BOM cost.

Can the MAX6378XR35 operate reliably at VCC = 1.2V?

Yes, the MAX6378XR35 is fully specified to operate and assert its output correctly down to VCC = 1.2V, and its output logic state remains valid even as VCC declines to 1.0V. This capability ensures robust reset generation during deep brownout or battery depletion scenarios where other supervisors may fail.

What is the maximum duration of a negative-going VCC transient that the MAX6378XR35 will ignore?

The MAX6378XR35 ignores negative-going VCC transients up to 20µs in duration when the overdrive (VTH – VCC) is 100mV, as shown in the Typical Operating Characteristics graph (MAX6375-04). Transient rejection decreases as overdrive increases - e.g., at 200mV overdrive, the maximum allowable pulse width drops to approximately 10µs.

Which package does the MAX6378XR35 use, and is it RoHS-compliant?

The MAX6378XR35 uses the 3-pin SC70 package (2.0mm × 1.25mm), and is available in both leaded and lead-free versions. To order the RoHS-compliant variant, replace the "-T" suffix with "+T" (e.g., MAX6378XR35+T), per Maxim's packaging specification in the Ordering Information section.