Analog Devices Inc./Maxim Integrated MAX6315US29D2-T

Overview

MAX6315US29D2-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 2.93V or upon manual reset assertion. It provides a guaranteed 20ms minimum reset timeout period, consumes only 5μA typical supply current at 5.5V, and operates across -40°C to +125°C for industrial and automotive power monitoring applications.

For engineers reviewing the MAX6315US29D2-T datasheet, MAX6315US29D2-T pinout, MAX6315US29D2-T application, or MAX6315US29D2-T equivalent, key selection criteria include factory-trimmed 2.93V reset threshold, SOT23-4 package compatibility, open-drain RESET output capable of level-shifting above VCC, and immunity to sub-100ns MR glitches.

Technical Context

The MAX6315US29D2-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider setting nominal VTH = 2.93V ±3.5% over full temperature range. Its internal timer initiates on VCC rise above threshold or MR deassertion and guarantees ≥20ms reset pulse width before release.

It features an integrated 63kΩ MR pullup resistor, supports manual reset pulse widths as short as 1μs, and delivers RESET output low-voltage performance down to 0.3V at 1.2mA sink current - enabling reliable interfacing with 1.8V–5V logic families despite VCC decay.

Key Specifications

Pinout & Package

MAX6315US29D2-T is housed in a RoHS-compliant 4-pin SOT23 package (outline 21-0052), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads optimized for automated assembly and thermal reliability in high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6314US29D2-T and TPS3808G29DBVR, the MAX6315US29D2-T uniquely combines open-drain level-shifting, ultra-low 5μA quiescent current, and guaranteed 20ms timeout in a 4-pin SOT23 - making it optimal for space-constrained, multi-rail, and battery-sensitive designs.

Availability

MAX6315US29D2-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical monitors, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6315US29D2-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 with precision, reliability, and innovation.

The MAX6315 series belongs to Analog Devices' supervisory IC product line, engineered specifically for robust, low-power, single-function voltage monitoring in mission-critical embedded systems where deterministic reset timing and wide-temperature operation are essential.

FAQ

What is the exact reset threshold voltage of the MAX6315US29D2-T?

The MAX6315US29D2-T has a factory-laser-trimmed nominal reset threshold of 2.93V, with tolerance of ±3.5% over the full -40°C to +125°C operating temperature range. This value is confirmed in the Ordering Information table and Electrical Characteristics section of the official Analog Devices datasheet for MAX6315US29D2-T.

Does the MAX6315US29D2-T support operation below 2.5V VCC?

Yes, the MAX6315US29D2-T operates with VCC as low as 1.0V, per its Absolute Maximum Ratings and Electrical Characteristics. While its 2.93V reset threshold is fixed, the device remains functional and can assert RESET down to 1.0V - enabling brownout detection and controlled shutdown in ultra-low-voltage scenarios.

Can the RESET output of the MAX6315US29D2-T be pulled up to 5V while monitoring a 3.3V VCC rail?

Yes, the MAX6315US29D2-T features an open-drain RESET output rated to +6.0V, allowing it to be pulled up to 5V (or any voltage ≤6V) independently of the 3.3V VCC rail being monitored. This enables level-shifting functionality critical in mixed-supply systems without requiring additional interface components.

What is the minimum manual reset pulse width supported by the MAX6315US29D2-T?

The MAX6315US29D2-T accepts manual reset pulses as short as 1μs, as specified in the Electrical Characteristics table under "MR Minimum Input Pulse." Its internal MR input circuitry also rejects glitches shorter than 100ns, ensuring robustness against noise while maintaining responsiveness to valid reset commands.

Is the MAX6315US29D2-T pin-compatible with the MAX811 series?

Yes, the MAX6315US29D2-T is explicitly stated in its Benefits and Features section to be pin-compatible with the MAX811 family. Both devices use the same 4-pin SOT23 package and identical pinout (VCC, MR, RESET, GND), enabling direct replacement in existing designs where the 20ms timeout and 2.93V threshold meet system requirements.