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 reset signal when voltage falls below 3.00V or upon manual reset assertion. It features factory-trimmed 3.00V threshold, 1ms minimum reset timeout (–40°C to +125°C), 5μA supply current, and SOT23-4 package-used in battery-powered controllers and embedded systems requiring reliable power-on reset.

For engineers reviewing the MAX6315US30D1-T datasheet, MAX6315US30D1-T pinout, MAX6315US30D1-T application, or MAX6315US30D1-T equivalent, key selection criteria include precise 3.00V reset threshold tolerance (±3.5% over –40°C to +125°C), immunity to sub-100ns MR glitches, open-drain RESET output capable of level-shifting above VCC, and guaranteed operation down to 1.0V VCC.

Technical Context

The MAX6315US30D1-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 3.00V nominal reset threshold, with ±3.5% variation across –40°C to +125°C. Its internal timer generates a fixed 1ms minimum reset timeout after VCC recovery or MR deassertion.

It uses an open-drain n-channel MOSFET for RESET output, enabling pullup to any voltage ≤6.0V-including supplies independent of VCC-and includes an internal 63kΩ MR pullup resistor. MR accepts logic-low input ≥1μs pulse width and rejects transients <100ns.

Key Specifications

Pinout & Package

MAX6315US30D1-T is housed in a RoHS-compliant 4-pin SOT23 package (outline 21-0052, land pattern 90-0183), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and thermal pad omitted.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US30D2-T and TLV803EB30DBZR, the MAX6315US30D1-T uniquely delivers 1ms minimum reset timing with open-drain output-enabling both ultra-fast release and multi-supply reset coordination in space-constrained SOT23 designs.

Availability

MAX6315US30D1-T is available at Aetrix Electronics and suitable for battery-powered controllers, industrial PLC I/O modules, and automotive body control units 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.

The MAX6315 series belongs to Analog Devices' precision supervisory IC product line, engineered specifically for reliable power-on reset, brownout detection, and manual reset coordination in resource-constrained embedded systems.

FAQ

What is the exact reset threshold voltage for 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 value is laser-trimmed during manufacturing and does not require external calibration. The MAX6315US30D1-T maintains this accuracy without user adjustment, ensuring consistent brownout detection across environmental conditions.

Does MAX6315US30D1-T support operation below 2.5V VCC?

Yes, the MAX6315US30D1-T operates down to 1.0V VCC, and its RESET output remains asserted as long as VCC stays below 3.00V-even at 1.0V. This allows the MAX6315US30D1-T to provide fail-safe reset signaling during deep brownout events where other supervisors may lose functionality. Its ability to sink current at VCC = 1.0V is confirmed in the Electrical Characteristics table.

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

Yes, the MAX6315US30D1-T features an open-drain RESET output rated for voltages up to +6.0V, allowing it to be pulled up to a supply rail independent of VCC-for example, pulling RESET to 5.0V while monitoring a 3.3V VCC rail. This capability is explicitly specified in the Absolute Maximum Ratings and used in Figure 1 of the MAX6315US30D1-T datasheet for multi-supply reset coordination.

What is the minimum pulse width required on the MR pin of MAX6315US30D1-T to assert reset?

The MR input of MAX6315US30D1-T requires a logic-low pulse of at least 1μs to reliably assert reset. This specification is documented in the Electrical Characteristics table under "MR Minimum Input Pulse." The MAX6315US30D1-T also rejects shorter noise spikes (<100ns), making it robust against EMI in industrial or automotive environments.

Is MAX6315US30D1-T pin-compatible with other devices in the MAX6315 family?

Yes, all MAX6315 variants-including MAX6315US30D1-T, MAX6315US30D2-T, and MAX6315US30D3-T-share identical 4-pin SOT23 pinout (VCC, MR, RESET, GND) and footprint. This allows direct substitution within the same threshold group (e.g., 3.00V) when different timeout periods are needed, without PCB layout changes. The MAX6315US30D1-T's top mark "KAGZ" distinguishes it visually but does not affect pin compatibility.