Analog Devices Inc./Maxim Integrated MAX6315US46D2

Overview

MAX6315US46D2 from Maxim Integrated is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and asserts an open-drain active-low RESET signal when voltage falls below 4.63V or upon manual reset assertion. It features a factory-trimmed 4.63V reset threshold, 20ms minimum reset timeout period, 5µA supply current, and SOT143 package. It is used in portable equipment and critical µP power monitoring to prevent code-execution errors during brownout or power-up.

For engineers reviewing the MAX6315US46D2 datasheet, MAX6315US46D2 pinout, MAX6315US46D2 application, or MAX6315US46D2 equivalent, key selection considerations include its precise 4.63V threshold tolerance (±1.8%), immunity to short VCC transients, open-drain output capable of level-shifting above VCC, and guaranteed operation over –40°C to +125°C.

Technical Context

The MAX6315US46D2 implements a precision voltage-monitoring comparator with laser-trimmed internal resistors to set the 4.63V reset threshold, and an internal timer that guarantees RESET remains asserted for ≥20ms after VCC rises above threshold or MR deasserts. Its open-drain RESET output uses an n-channel MOSFET switch, enabling pull-up to any voltage up to +6V - independent of VCC.

It includes a debounced manual reset input (MR) with 63kΩ internal pull-up, supporting momentary switch connection to GND without external components. The device rejects transients ≤1µs at 100mV overdrive and maintains functional reset assertion down to VCC = 1V, ensuring robust operation across power-rail collapse scenarios.

Key Specifications

Pinout & Package

SOT143 (4-pin, surface-mount) package with 1.3mm × 2.1mm footprint and 0.95mm height - optimized for space-constrained PCB layouts in portable and embedded systems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US46D1-T, the MAX6315US46D2 offers 20× longer reset timeout for robust µP initialization; compared with TLV803EB29DBZR, it provides higher threshold accuracy, MR functionality, and wider VCC range - at the cost of higher quiescent current and larger SOT143 footprint.

Availability

MAX6315US46D2 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC controllers, automotive telematics units, and smart energy meters requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for MAX6315US46D2 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 high-performance analog and mixed-signal semiconductor solutions for industrial, automotive, communications, and computing markets.

The MAX6315 family delivers precision, low-power supervisory circuits for µP reset generation - engineered specifically for reliability in harsh environments and minimal external component count in space- and power-constrained systems.

FAQ

What is the exact reset threshold voltage for MAX6315US46D2?

The MAX6315US46D2 has a factory-trimmed nominal reset threshold of 4.63V, with a tolerance of ±1.8% over the full temperature range (–40°C to +125°C). This value is laser-trimmed during production and specified in the Electrical Characteristics table under "Reset Threshold (VTH)" with min/typ/max columns confirming 4.55V to 4.71V at +25°C and tighter bounds over temperature.

Does MAX6315US46D2 support manual reset functionality?

Yes, the MAX6315US46D2 includes a dedicated MR (manual reset) input (Pin 3) that asserts RESET when pulled low. It features an internal 63kΩ pull-up resistor, so MR can be left floating if unused. A momentary switch from MR to GND provides hardware reset capability without external components - a key feature confirmed in the Pin Description and Applications Information sections.

What is the minimum reset timeout period for MAX6315US46D2?

The MAX6315US46D2 guarantees a minimum reset timeout period (tRP) of 20ms after VCC rises above the 4.63V threshold or after MR is deasserted. This value is fixed per the "D2" suffix in the part number and verified in the Ordering Information table and Electrical Characteristics section, where tRP is listed as "20" under MIN for all D2 variants.

Can the RESET output of MAX6315US46D2 be pulled up to a voltage higher than VCC?

Yes, the RESET output of MAX6315US46D2 is an open-drain n-channel MOSFET capable of being pulled up to any voltage between 0V and +6.0V - including voltages higher than VCC. This is explicitly stated in the General Description, Pin Description, and Typical Operating Circuit, enabling level-shifting across different logic domains without additional interface circuitry.

What package type and dimensions does MAX6315US46D2 use?

The MAX6315US46D2 uses the SOT143 (4-pin) surface-mount package, measuring 1.3mm × 2.1mm with 0.95mm height. This is confirmed in the General Description ("SOT143 package"), Chip Information section ("PACKAGE OUTLINE, SOT-143, 4L"), and Pin Configuration diagram showing top-view pin layout for SOT143.