Analog Devices Inc./Maxim Integrated MAX6713SEXS-T

Overview

MAX6713SEXS-T from Maxim Integrated is a precision microprocessor supervisory circuit with open-drain active-low RESET output, designed to monitor +2.93V power supplies in embedded digital systems. It provides 140ms minimum reset timeout, 12µA supply current at +25°C, and guaranteed reset validity down to VCC = +1V. Used in portable equipment and critical µP systems requiring reliable brownout detection.

For engineers reviewing the MAX6713SEXS-T datasheet, MAX6713SEXS-T pinout, MAX6713SEXS-T application, or MAX6713SEXS-T equivalent, key selection criteria include its 2.93V reset threshold, SC70-4 package, manual reset input with internal 20kΩ pull-up, open-drain output compatibility with bidirectional µP reset pins, and operation across –40°C to +125°C.

Technical Context

The MAX6713SEXS-T implements a precision bandgap-based voltage comparator with 30ppm/°C tempco to detect VCC falling below 2.93V (±0.03V at +25°C), asserting an open-drain RESET signal that remains active for ≥140ms after recovery. Its MR input includes internal 20kΩ pull-up and accepts TTL/CMOS logic levels.

Unlike push-pull variants (MAX6711/MAX6712), the open-drain RESET allows level-shifting-e.g., pulling up to 5V while monitoring a 2.93V rail-and supports bidirectional reset interfaces like the Motorola 68HC11. Reset assertion is immune to transients ≤20µs at 100mV overdrive.

Key Specifications

Pinout & Package

MAX6713SEXS-T is housed in a 4-pin SC70 package (outline X4-1, land pattern 90-0187), measuring 1.25mm × 1.25mm × 0.9mm with 0.65mm pitch. The compact footprint supports high-density PCB layouts in space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6713TEUS-T, the MAX6713SEXS-T provides earlier reset assertion for 2.93V rails, improving system robustness during marginal supply conditions; versus TPS3808G12DBVR, it offers MR support and open-drain versatility essential for bidirectional reset architectures.

Availability

MAX6713SEXS-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, critical µP and µC power monitoring, and intelligent instruments requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6713SEXS-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 industrial, communications, and consumer applications, emphasizing reliability, integration, and low-power operation.

The MAX671x family delivers highly accurate, low-quiescent-current supervisory circuits targeting microprocessor reset and power-monitoring functions in space- and power-constrained embedded systems.

FAQ

What is the reset threshold voltage of the MAX6713SEXS-T?

The MAX6713SEXS-T has a factory-trimmed reset threshold of 2.93V ±0.03V at +25°C, with a tempco of 30ppm/°C. This value is confirmed in the Electrical Characteristics table for the "S" variant and applies across the full –40°C to +125°C operating range. The MAX6713SEXS-T uses this precise threshold to assert RESET when the monitored 2.93V supply falls below specification, ensuring deterministic system recovery.

Does the MAX6713SEXS-T require an external pull-up resistor on the RESET pin?

Yes, the MAX6713SEXS-T features an open-drain RESET output and requires an external pull-up resistor to function correctly. The datasheet specifies that the pull-up can connect to any voltage between 0V and +6.0V-including supplies higher than VCC-enabling level-shifting. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements. Without this resistor, the MAX6713SEXS-T cannot drive a valid high logic level.

What is the function of the MR pin on the MAX6713SEXS-T?

The MR (Manual Reset) pin on the MAX6713SEXS-T is an active-low input with an internal 20kΩ pull-up resistor. When pulled low-via switch, logic signal, or test equipment-it forces RESET assertion for ≥140ms after release. This allows field service, automated testing, or user-initiated system reset without power cycling. The MAX6713SEXS-T tolerates MR pulses as short as 1µs and provides 100ns glitch immunity, making it robust in noisy environments.

Can the MAX6713SEXS-T operate reliably at VCC = +1V?

Yes, the MAX6713SEXS-T guarantees RESET output validity down to VCC = +1V. Below this voltage, the internal output stage ceases sinking current and becomes high-impedance. However, for applications requiring defined logic state down to 0V, a 100kΩ pull-down resistor on the RESET line is recommended-as documented in Figure 2 of the datasheet-to prevent floating inputs on connected µP reset pins. This behavior is explicitly characterized and tested for the MAX6713SEXS-T.

What package type and dimensions does the MAX6713SEXS-T use?

The MAX6713SEXS-T is packaged in a 4-pin SC70 (SOT-323) outline, designated X4-1 with land pattern 90-0187. Its physical dimensions are 1.25mm × 1.25mm × 0.9mm, with 0.65mm lead pitch. This ultra-small footprint supports high-density PCB layouts in portable and handheld equipment. The "-T" suffix indicates tape-and-reel packaging in 2.5k-unit reels, with lead-free compliance achieved by ordering the "+T" variant.