Analog Devices Inc./Maxim Integrated MAX6315US26D4+T

Overview

MAX6315US26D4+T from Analog Devices is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and asserts an open-drain reset signal when voltage falls below 2.63V or upon manual reset assertion. It provides a factory-trimmed 1120ms (min) reset timeout period, operates from -40°C to +125°C, draws only 5μA typical supply current, and uses a 4-pin SOT23 package for space-constrained embedded power monitoring.

For engineers reviewing the MAX6315US26D4+T datasheet, MAX6315US26D4+T pinout, MAX6315US26D4+T application, or MAX6315US26D4+T equivalent, this page delivers verified electrical parameters, thermal performance data, reset timing behavior across temperature, MR input thresholds, and open-drain RESET output drive capability up to 6V - all critical for brownout protection in industrial controllers and battery-powered systems.

Technical Context

The MAX6315US26D4+T implements a precision voltage-monitoring comparator with factory-laser-trimmed resistive divider setting a nominal 2.63V reset threshold (±3.5% over -40°C to +125°C) and 60ppm/°C tempco. Its internal timer generates a guaranteed minimum 1120ms reset timeout after VCC recovery or MR deassertion.

It features an internally pulled-up manual reset input (63kΩ) with 100ns glitch rejection and 1μs minimum pulse width requirement, and an open-drain RESET output capable of sinking 3.2mA at VCC > 4.25V while supporting level-shifted pullup voltages up to 6V - enabling interoperability with mixed-supply μP reset inputs.

Key Specifications

Pinout & Package

Package: 4-pin SOT23 (U4+1), 1.3mm × 2.9mm footprint, RoHS-compliant, surface-mountable with standard reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US26D3+T and TLV803EB26DBZR, the MAX6315US26D4+T uniquely combines long-duration reset assertion (1120ms), integrated manual reset, and wide-temperature operation - making it optimal for safety-critical industrial and medical systems requiring deterministic recovery timing and field-service reset capability.

Availability

MAX6315US26D4+T is available at Aetrix Electronics and suitable for industrial motor drives, medical infusion pumps, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX6315US26D4+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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX6315 family is part of Analog Devices' precision power supervision portfolio, engineered specifically for robust, low-power reset generation in harsh-environment embedded systems where voltage stability and timing predictability are mission-critical.

FAQ

What is the exact reset threshold voltage and tolerance for MAX6315US26D4+T?

The MAX6315US26D4+T has a factory-trimmed nominal reset threshold of 2.63V, with a tolerance of ±3.5% over the full operating temperature range of -40°C to +125°C. This specification is confirmed in the Electrical Characteristics table of the official datasheet, and the device uses laser-trimmed internal resistors to achieve this precision without external components.

Does MAX6315US26D4+T support manual reset functionality, and how is it implemented?

Yes, MAX6315US26D4+T includes a dedicated MR (manual reset) input on Pin 3. It features an internal 63kΩ pullup resistor, allowing direct connection of a momentary switch to ground without external components. A logic-low pulse ≥1μs asserts reset, and the device maintains reset for the full 1120ms timeout after MR returns high - verified in the datasheet's MR timing specifications.

Can the RESET output of MAX6315US26D4+T be pulled up to a voltage higher than its VCC supply?

Yes, the RESET output of MAX6315US26D4+T is an open-drain n-channel MOSFET rated for voltages up to +6.0V, independent of VCC. This allows level-shifting - for example, pulling RESET up to a 5V rail while VCC is supplied from a 3.3V source - a capability explicitly documented in both Absolute Maximum Ratings and Pin Description sections of the datasheet.

What is the guaranteed minimum reset timeout period for MAX6315US26D4+T across temperature?

The guaranteed minimum reset timeout period for MAX6315US26D4+T is 1120ms over the full -40°C to +125°C operating temperature range. This value is specified in the Ordering Information table and confirmed in the Electrical Characteristics section under "Reset Timeout Period" for the D4 variant, with upper limits up to 2688ms at +125°C.

Is MAX6315US26D4+T compatible with microcontrollers that require a push-pull reset signal?

No, MAX6315US26D4+T provides only an open-drain RESET output and does not support push-pull drive. It requires an external pullup resistor to generate a logic-high state. If a push-pull interface is mandatory, a discrete transistor buffer or a different supervisory IC such as the MAX6326 series (with push-pull output option) must be used instead - as noted in the datasheet's "Reset Output" subsection.