Analog Devices Inc./Maxim Integrated MAX6378XR34-T

Overview

MAX6378XR34-T from Maxim Integrated is an ultra-low-power, factory-trimmed voltage detector IC with 3.40V threshold, push-pull active-low output, SC70-3 package, and 500nA supply current - used for precision power-supply monitoring in battery-backed microcontroller reset circuits.

For engineers reviewing the MAX6378XR34-T datasheet, MAX6378XR34-T pinout, MAX6378XR34-T application, or MAX6378XR34-T equivalent, this page delivers verified threshold accuracy (±2.5% over -40°C to +85°C), propagation delay (9.5µs), VCC operating range (1.2V to 5.5V), and transient immunity specs critical for portable system reliability.

Technical Context

The MAX6378XR34-T integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver a fixed 3.40V detection threshold with ±2.5% tolerance across temperature. It asserts a logic-low output when VCC falls below VTH and holds valid state down to 1V supply.

Designed for immunity to fast transients, it rejects negative-going VCC glitches up to 200µs at 10mV overdrive and supports open-drain or push-pull configurations across the MAX6375–MAX6380 family - with MAX6378XR34-T specifically configured as active-low push-pull.

Key Specifications

Pinout & Package

MAX6378XR34-T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained portable designs. The package is lead-free and RoHS-compliant, with tape-and-reel delivery standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6378UR34-T, the MAX6378XR34-T saves 0.3mm² board area and maintains identical performance; versus TPS3123QDBVR, it reduces supply current by 97% but omits integrated watchdog - making it optimal for static voltage supervision where minimal power and small size are primary constraints.

Availability

MAX6378XR34-T is available at Aetrix Electronics and suitable for portable equipment, battery-powered instrumentation, and microcontroller-based embedded systems requiring stable component supply and long-term lifecycle support.

Supply support for MAX6378XR34-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 and mixed-signal ICs for power management, sensing, and interface applications - serving industrial, medical, and communications markets since 1983.

The MAX6375–MAX6380 series was developed specifically for ultra-low-power voltage supervision in space- and energy-constrained systems, emphasizing sub-µA operation, factory-trimmed accuracy, and SC70/SOT23 footprint flexibility.

FAQ

What is the exact factory-trimmed threshold voltage of MAX6378XR34-T?

The MAX6378XR34-T has a nominal threshold voltage of 3.40V, with ±2.5% tolerance over the full -40°C to +85°C temperature range. This value is laser-trimmed at wafer test and confirmed in Table 1 of the datasheet under suffix "R34". The actual measured VTH at +25°C falls between 3.349V (min) and 3.451V (max).

Does MAX6378XR34-T require external components to operate?

No, the MAX6378XR34-T requires no external components. Its precision bandgap reference, comparator, and factory-trimmed resistive divider are fully integrated. Only VCC, GND, and the OUT signal need connection - eliminating calibration resistors, capacitors, or trimming potentiometers typically found in discrete supervisor solutions.

What is the maximum VCC transient duration that MAX6378XR34-T can ignore?

The MAX6378XR34-T ignores negative-going VCC transients up to 200µs in duration when the overdrive (VTH – VCC) is 10mV, per the "Maximum Transient Duration vs. Threshold Overdrive" graph in the datasheet. At 100mV overdrive, immunity drops to ~20µs - ensuring robust operation in noisy DC/DC converter environments.

Can MAX6378XR34-T drive a standard CMOS input directly?

Yes, the MAX6378XR34-T's push-pull active-low output can directly drive standard CMOS inputs. With VOL ≤0.4V at ISINK = 100µA and VOH ≥0.8×VCC when deasserted, it meets 3.3V and 5V CMOS logic thresholds across its full VCC range (1.2V to 5.5V), eliminating need for level-shifting or pull-up resistors.

Is MAX6378XR34-T compatible with lead-free solder reflow profiles?

Yes, MAX6378XR34-T is manufactured in lead-free packaging compliant with JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and qualified for standard Pb-free reflow profiles, including peak temperatures up to 260°C. The "-T" suffix denotes lead-free finish; no special process adjustments are required beyond standard RoHS-compliant assembly.