Analog Devices Inc./Maxim Integrated MAX6315US46D3+T

Overview

MAX6315US46D3+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 voltage falls below 4.63V or when manual reset (MR) is asserted. It provides a factory-trimmed 140ms minimum reset timeout period, 5μA supply current at +25°C, and operates across -40°C to +125°C for critical power monitoring in battery-powered microcontroller systems.

For engineers reviewing the MAX6315US46D3+T datasheet, MAX6315US46D3+T pinout, MAX6315US46D3+T application, or MAX6315US46D3+T equivalent, this page delivers verified electrical parameters, SOT23 package details, reset timing behavior, manual reset debounce capability, and direct alternatives for industrial embedded and portable equipment designs.

Technical Context

The MAX6315US46D3+T implements a precision voltage-monitoring comparator with factory-laser-trimmed resistive divider setting nominal VTH = 4.63V ±3.5% over -40°C to +125°C, and integrates a monostable timer for fixed 140ms (min) reset assertion after VCC recovery or MR release. Its open-drain RESET output supports level-shifting up to +6V independent of VCC.

It features internal 63kΩ MR pullup, 100ns MR glitch rejection, 500ns MR-to-RESET delay, and immunity to VCC transients ≤35μs at 4.63V–VCC overdrive ≥20mV - enabling reliable operation without external RC networks in noisy environments.

Key Specifications

Pinout & Package

Delivered in a RoHS-compliant 4-pin SOT23 package (outline 21-0052), with 1.3mm × 0.8mm body size and 0.95mm pitch. Pin 1 = GND, Pin 2 = RESET (open-drain), Pin 3 = MR (manual reset input), Pin 4 = VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US46D2+T and TPS3808G33DBVR, the MAX6315US46D3+T uniquely combines 4.63V precision threshold, 140ms guaranteed reset hold time, integrated MR debounce, and 4-pin SOT23 compatibility - making it optimal for legacy 5V microcontroller systems requiring robust brownout recovery without layout changes.

Availability

MAX6315US46D3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6315US46D3+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 product line delivers precision, low-power supervisory circuits for microprocessor reset generation - engineered specifically for reliability in harsh environments and minimal bill-of-materials impact in space-constrained designs.

FAQ

What is the exact reset threshold voltage of the MAX6315US46D3+T?

The MAX6315US46D3+T has a factory-trimmed nominal reset threshold voltage of 4.63V, with tolerance of ±3.5% over the full operating temperature range (-40°C to +125°C). This value is laser-trimmed during production and specified in the Electrical Characteristics table under "Reset Threshold (V_TH)" with test conditions confirming stability across temperature and supply variations. The MAX6315US46D3+T is explicitly designated for 4.63V monitoring per the Ordering Information table.

Does the MAX6315US46D3+T support manual reset functionality?

Yes, the MAX6315US46D3+T includes a dedicated manual reset (MR) input on Pin 3. A logic-low signal on MR immediately asserts the RESET output, and reset remains active for the full 140ms timeout period after MR returns high. The device integrates a 63kΩ internal pullup resistor on MR, allowing direct connection of a momentary switch to ground without external components. The MAX6315US46D3+T also provides 100ns glitch rejection on MR to prevent spurious resets in noisy environments.

What is the minimum reset timeout period for the MAX6315US46D3+T?

The MAX6315US46D3+T provides a minimum reset timeout period (t_RP) of 140ms, as confirmed in the Electrical Characteristics table under "Reset Timeout Period" for part suffix D3-T. This value is guaranteed over the full -40°C to +125°C temperature range and represents the shortest duration RESET remains asserted after VCC rises above 4.63V or after MR deassertion. The MAX6315US46D3+T's 140ms timeout exceeds typical microcontroller boot ROM execution times, ensuring reliable initialization.

Can the RESET output of the MAX6315US46D3+T be pulled up to a voltage higher than VCC?

Yes, the MAX6315US46D3+T features an open-drain RESET output rated for voltages up to +6.0V, allowing it to be pulled up to a supply rail higher than VCC (e.g., pulling RESET to +5V while VCC = +3.3V). This enables level-shifting between power domains and simplifies interfacing with mixed-voltage systems. The datasheet specifies RESET output voltage limits independently of VCC, and the MAX6315US46D3+T's internal MOSFET structure supports this capability without damage or functional degradation.

What package type and footprint does the MAX6315US46D3+T use?

The MAX6315US46D3+T is packaged in a 4-pin SOT23 case (package code U4+1, outline 21-0052), with 0.95mm pin pitch and 1.3mm × 0.8mm body dimensions. This RoHS-compliant surface-mount package is compatible with standard reflow profiles and automated pick-and-place equipment. The pin configuration is fixed: Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC - matching the MAX811 pinout and enabling drop-in replacement in existing layouts designed for that family.