Analog Devices Inc./Maxim Integrated MAX6315US30D1+T

Overview

The MAX6315US30D1+T from Analog Devices is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and asserts an open-drain active-low RESET signal when VCC falls below 3.00V or when manual reset (MR) is asserted. It features a factory-trimmed 3.00V reset threshold, 1ms minimum reset timeout period, 5μA supply current at +25°C, and operates across -40°C to +125°C. It is used in battery-powered microcontroller systems requiring reliable power-on reset and brownout protection.

For engineers reviewing the MAX6315US30D1+T datasheet, MAX6315US30D1+T pinout, MAX6315US30D1+T application, or MAX6315US30D1+T equivalent, this page delivers verified electrical parameters, SOT23 package details, reset timing behavior under temperature variation, MR input logic thresholds, and design-critical open-drain output voltage limits up to +6.0V.

Technical Context

The MAX6315US30D1+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistors setting a nominal 3.00V reset threshold (±3.5% over -40°C to +125°C), and an internal monostable timer generating a guaranteed-minimum 1ms reset pulse width after VCC recovery or MR release. Its open-drain RESET output uses an n-channel MOSFET capable of sinking 3.2mA at VCC > 4.25V while tolerating pullup voltages up to +6.0V - enabling level-shifted reset signaling across mixed-supply systems.

MR input includes a 63kΩ internal pullup resistor, accepts logic-low pulses as short as 1μs, rejects glitches <100ns, and exhibits 500ns propagation delay to RESET assertion. The device draws only 15μA max ICC at VCC = 5.5V and TA = +125°C, and remains functional down to VCC = 1.0V with guaranteed RESET low-state operation.

Key Specifications

Pinout & Package

MAX6315US30D1+T is housed in a RoHS-compliant 4-pin SOT23 package (outline 21-0052, land pattern 90-0183), with gull-wing leads and thermal pad omitted. Pin 1 is GND, Pin 2 is RESET (open-drain), Pin 3 is MR (manual reset input), and Pin 4 is VCC (supply and threshold monitor input).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US30D2+T and TPS3808G30DBVR, the MAX6315US30D1+T provides the shortest guaranteed reset pulse (1ms) in a minimal 4-pin SOT23 footprint with lowest component count - ideal for space-constrained, cost-sensitive, and ultra-low-power applications where fixed timing suffices.

Availability

MAX6315US30D1+T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, automotive body control modules, and medical point-of-care devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6315US30D1+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 since 1965.

The MAX6315 family is part of Analog Devices' precision power supervision portfolio, engineered specifically for microprocessor and microcontroller reset assurance in harsh thermal and electrical environments with minimal external components.

FAQ

What is the exact reset threshold voltage of the MAX6315US30D1+T?

The MAX6315US30D1+T has a factory-trimmed nominal reset threshold of 3.00V, with tolerance of ±3.5% over the full operating temperature range of -40°C to +125°C. This means the actual threshold falls between 2.895V and 3.105V at +25°C, and widens slightly at temperature extremes - confirmed in the Electrical Characteristics table under "Reset Threshold (Note 1)".

Does the MAX6315US30D1+T require external components to function?

No, the MAX6315US30D1+T operates autonomously with no external components required. It integrates laser-trimmed resistors for threshold setting, an internal pullup on MR (63kΩ), and a monostable timer for reset timeout. Only an external pullup resistor on the open-drain RESET pin is needed - typically 10kΩ - to define the logic-high level, which may connect to VCC or another supply up to +6.0V.

Can the RESET output of the MAX6315US30D1+T be pulled up to a voltage higher than VCC?

Yes, the RESET output of the MAX6315US30D1+T is an open-drain n-channel MOSFET rated for voltages up to +6.0V, independent of VCC. This allows pulling RESET up to a higher-voltage rail (e.g., 5V) while monitoring a 3.3V VCC supply - enabling level-shifted reset signaling without additional logic or translators, as explicitly stated in the Absolute Maximum Ratings and Detailed Description sections.

What is the minimum reset timeout period specified for the MAX6315US30D1+T?

The MAX6315US30D1+T has a guaranteed minimum reset timeout period (tRP) of 1ms over -40°C to +125°C. Per the Electrical Characteristics table, the typical value is 1.4ms and maximum is 2ms at -40°C to +85°C, and 0.8ms to 2.4ms at -40°C to +125°C - all meeting or exceeding the 1ms minimum required for most microcontrollers' reset timing specifications.

Is the MAX6315US30D1+T pin-compatible with other members of the MAX6315 family?

Yes, all MAX6315 variants - including MAX6315US30D1+T, MAX6315US30D2+T, and MAX6315US30D3+T - share identical 4-pin SOT23 pinout (GND, RESET, MR, VCC) and mechanical footprint. Differences are limited to reset threshold voltage (3.00V here) and minimum timeout period (1ms here), making them drop-in replacements for layout - though system timing validation is required when changing timeout values.