Analog Devices Inc./Maxim Integrated MAX6711LEXS+T

Overview

MAX6711LEXS+T from Maxim Integrated is a precision microprocessor supervisory circuit with push-pull active-low RESET output, designed to monitor +5.0V power supplies in embedded systems. It asserts reset when VCC falls below 4.63V (±0.07V at +25°C), guarantees valid reset down to VCC = +1V, and delivers a minimum 140ms power-on reset pulse width-used in critical µP power monitoring for industrial controllers and intelligent instruments.

For engineers reviewing the MAX6711LEXS+T datasheet, MAX6711LEXS+T pinout, MAX6711LEXS+T application, or MAX6711LEXS+T equivalent, key selection factors include its 4.63V reset threshold accuracy, 12µA supply current at +25°C, SC70-4 package footprint, and compatibility with manual reset input requiring no external debounce.

Technical Context

The MAX6711LEXS+T implements a precision bandgap-based voltage comparator with 30ppm/°C tempco to maintain reset threshold stability across –40°C to +125°C. Its internal 20kΩ MR pull-up resistor enables direct switch-to-ground connection without external components.

Reset assertion is triggered by VCC decay below 4.63V or MR low assertion, with guaranteed reset hold time ≥140ms after recovery-ensuring reliable µP initialization during brownout and power-up sequences. The push-pull output drives CMOS/TTL loads directly without pull-up resistors.

Key Specifications

Pinout & Package

MAX6711LEXS+T is housed in a 4-pin SC70 package (outline X4-1, land pattern 90-0187), measuring 1.25mm × 0.85mm × 0.55mm, suitable for space-constrained PCB layouts in portable instrumentation and controller modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Compared with MAX6711LEXS+T, MAX6326LUR29+T offers smaller pin count but omits manual reset and fixed 5V compatibility, while TPS3808G12DBVR provides threshold flexibility and watchdog extension at the cost of higher BOM count and larger package-making MAX6711LEXS+T optimal for cost-sensitive, space-constrained 5V µP supervision with MR support.

Availability

MAX6711LEXS+T is available at Aetrix Electronics and suitable for industrial controllers, intelligent instruments, and portable/battery-powered equipment requiring stable component supply, RoHS-compliant lead-free packaging, and long-term production continuity.

Supply support for MAX6711LEXS+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 high-performance analog and mixed-signal ICs for industrial, computing, and communications applications-with emphasis on reliability, integration, and low-power operation.

The MAX6711LEXS+T belongs to the MAX6711/MAX6712/MAX6713 family of microprocessor supervisory circuits, engineered specifically for precision power-monitoring in space-constrained, battery-sensitive, and thermally demanding embedded systems.

FAQ

What is the reset threshold voltage of the MAX6711LEXS+T?

The MAX6711LEXS+T has a factory-trimmed reset threshold of 4.63V ±0.07V at +25°C, with temperature coefficient of 30ppm/°C. This value is specified across –40°C to +125°C operating range and ensures reliable detection of 5V supply brownout before critical µP operation fails. The MAX6711LEXS+T maintains this accuracy without external calibration components.

Does the MAX6711LEXS+T require external components for basic operation?

No, the MAX6711LEXS+T operates autonomously with no external components required: it integrates a 20kΩ internal pull-up on MR, precision voltage reference, and push-pull RESET driver. Only a 0.1µF ceramic bypass capacitor on VCC is recommended for noise immunity. This eliminates discrete resistors, capacitors, or trim pots needed by older supervisors-reducing BOM cost and PCB area for the MAX6711LEXS+T.

What is the minimum VCC voltage at which MAX6711LEXS+T guarantees valid RESET output?

The MAX6711LEXS+T guarantees correct logic state on its RESET output down to VCC = +1V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. Below +1V, the output becomes high-impedance-but since most µPs cease operation below 1.2V, this aligns with system-level power collapse behavior. For applications requiring RESET validity to 0V, a 100kΩ pull-down resistor is advised per Maxim's Figure 2.

How does the manual reset (MR) input function on the MAX6711LEXS+T?

The MR input on the MAX6711LEXS+T is an active-low signal with internal 20kΩ pull-up to VCC, allowing direct connection to ground via a momentary switch-no external resistor needed. RESET remains asserted while MR is low and for ≥140ms after MR returns high. It accepts TTL/CMOS logic levels and features 100ns glitch immunity, making it robust against contact bounce or EMI in industrial control panels using the MAX6711LEXS+T.

What package type and dimensions does the MAX6711LEXS+T use?

The MAX6711LEXS+T uses a 4-pin SC70 package (outline X4-1, land pattern 90-0187), measuring 1.25mm × 0.85mm × 0.55mm with 0.65mm pin pitch. This ultra-small footprint is 40% smaller than SOT23-5 and enables high-density routing in portable instrumentation and compact controller modules where board space is constrained for the MAX6711LEXS+T.