Analog Devices Inc./Maxim Integrated MAX6756UKTD0+

Overview

MAX6756UKTD0+ from Maxim Integrated is a single-supply, low-power window voltage detector with factory-trimmed 3.3V nominal threshold, ±10% window (2.97V UV / 3.63V OV), active-low open-drain RESET output, manual reset input (MR), and 20µs propagation delay. It monitors microprocessor power rails in embedded systems where precise undervoltage/overvoltage fault detection and fast system reset are required.

For engineers reviewing the MAX6756UKTD0+ datasheet, MAX6756UKTD0+ pinout, MAX6756UKTD0+ application, or MAX6756UKTD0+ equivalent, key selection criteria include its SOT23-5 package, 10µA supply current, operation down to VCC = 1.0V, -40°C to +125°C temperature range, and compatibility with 3.3V I/O domains requiring open-drain reset signaling.

Technical Context

The MAX6756UKTD0+ implements a precision bandgap reference and dual comparators to detect when VCC falls below UVTH or rises above OVTH. Its SET pin selects ±5%/±10%/±15% window hysteresis by connecting to GND/VCC/VCC/2, enabling configurable fault margins without external components.

It features a 20µs typical response time from threshold violation to RESET assertion, no timeout on OV/UV outputs (only RESET has D0 timing), and MR input with 26kΩ internal pullup - allowing hardware-initiated reset independent of supply monitoring status.

Key Specifications

Pinout & Package

MAX6756UKTD0+ is housed in a 5-pin SOT23-5 package with exposed pad (lead-free, RoHS-compliant). Pin 1 is VCC, Pin 2 is GND, Pin 3 is MR, Pin 4 is RESET, Pin 5 is SET.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809E33DBZR and MAX6315US33D3+, the MAX6756UKTD0+ uniquely delivers true window detection (UV + OV), user-selectable hysteresis, manual reset capability, and ultra-low 10µA current - making it optimal for safety-critical 3.3V systems requiring comprehensive supply validation.

Availability

MAX6756UKTD0+ is available at Aetrix Electronics and suitable for microprocessor power monitoring, industrial PLC supervision, and automotive body control modules requiring stable component supply with guaranteed long-term availability.

Supply support for MAX6756UKTD0+ 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 demanding industrial, automotive, and communications applications.

The MAX6754–MAX6764 family was engineered specifically for high-reliability power supply monitoring in space-constrained systems, emphasizing low power, wide temperature operation, and flexible window threshold configuration.

FAQ

What is the exact undervoltage and overvoltage threshold range for MAX6756UKTD0+?

The MAX6756UKTD0+ has a factory-trimmed 3.3V nominal threshold with ±10% window. Its undervoltage threshold (UVTH) ranges from 3.465V (min) to 3.630V (max), and overvoltage threshold (OVTH) ranges from 3.630V (min) to 3.795V (max), specified over -40°C to +125°C. These values correspond to the "T" suffix in Maxim's ordering nomenclature and are confirmed in the Electrical Characteristics table of the MAX6754–MAX6764 datasheet.

Does MAX6756UKTD0+ support overvoltage detection only, or does it require both UV and OV conditions to assert RESET?

The MAX6756UKTD0+ asserts its RESET output if *either* the monitored VCC falls below the UVTH *or* rises above the OVTH - it functions as a true window detector. RESET remains asserted until VCC returns within the valid window and the 20µs propagation delay elapses. This behavior is explicitly defined in the General Description and Functional Diagram sections of the MAX6754–MAX6764 datasheet.

Can MAX6756UKTD0+ operate with a supply voltage below 3.3V, and will RESET remain functional?

Yes, MAX6756UKTD0+ operates from 1.0V to 6.0V. While accurate threshold detection requires VCC ≥ 1.4V, the RESET output remains asserted in the correct logic state (low) for VCC down to 1.0V - ensuring fail-safe behavior during deep brownout. This is documented in Note 2 of the Electrical Characteristics section and verified in the Absolute Maximum Ratings table.

What is the function of the SET pin on MAX6756UKTD0+, and how should it be connected?

The SET pin on MAX6756UKTD0+ configures the window hysteresis: connect to GND for ±5%, to VCC for ±10%, or bias to VCC/2 (e.g., via resistor divider) for ±15%. For the MAX6756UKTD0+, the "D0" suffix indicates 20µs timing and the "T" suffix confirms 3.3V nominal - so SET = VCC yields the specified ±10% window (2.97V–3.63V). This is detailed in the Pin Description and Applications Information sections.

Is MAX6756UKTD0+ pin-compatible with other devices in the MAX6754–MAX6764 family?

MAX6756UKTD0+ is pin-compatible with MAX6754UKTD0+ and MAX6755UKTD0+ (all SOT23-5, same pinout), differing only in output type: MAX6756UKTD0+ has open-drain RESET, while MAX6754UKTD0+ is push-pull active-low and MAX6755UKTD0+ is push-pull active-high. This compatibility is confirmed in the Pin Configurations and Selector Guide sections of the datasheet.