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Analog Devices Inc./Maxim Integrated MAX6315US43D3-T
- Part No.:
- MAX6315US43D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US43D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,562
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Product details
Overview
MAX6315US43D3-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 4.39V or when manual reset (MR) is asserted. It provides a guaranteed 140ms minimum reset timeout period, consumes only 5μA typical supply current at 5.5V, and operates across -40°C to +125°C for use in battery-powered industrial controllers.
For engineers reviewing the MAX6315US43D3-T datasheet, MAX6315US43D3-T pinout, MAX6315US43D3-T application, or MAX6315US43D3-T equivalent, this page delivers verified electrical parameters, SOT23 package mapping, reset threshold accuracy (±3.5% over full temperature range), MR input logic thresholds, and open-drain RESET output behavior up to 6V.
Technical Context
The MAX6315US43D3-T implements a precision voltage-monitoring comparator with factory-trimmed resistive divider setting nominal VTH = 4.39V, and an internal monostable timer initiating 140ms (min) reset assertion after VCC recovery or MR release. Its MR input includes 63kΩ internal pullup and 100ns glitch rejection.
RESET output uses an open-drain n-channel MOSFET capable of sinking ≥1.2mA at VCC > 2.5V while allowing pullup to any voltage ≤6V - enabling level-shifting between monitored and reset-logic supplies, such as interfacing a 3.3V μP with a 5V system rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Reset Threshold | 4.39V ±3.5% over -40°C to +125°C - ensures reliable brownout detection for 4.5V nominal systems |
| Reset Timeout Period | 140ms minimum - guarantees sufficient μP initialization time after power recovery | Supply Current | 5μA typical at 5.5V - enables multi-year operation in coin-cell–powered IoT sensors |
| MR Input Threshold | VIL = 0.8V, VIH = 2.4V (for VTH > 4.0V) - compatible with standard 3.3V/5V logic drivers |
| RESET Output Sink Capability | 1.2mA at VCC > 2.5V, VOL ≤ 0.3V - supports direct interface to μP reset pins without external buffer |
| Operating Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial motor control environments |
Pinout & Package
Package: 4-pin SOT23 (U4+1), footprint per Analog Devices land pattern 90-0183, RoHS-compliant, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for internal comparator and reset timer; must be low-impedance connection to system ground plane |
| RESET (Pin 2) | Active-low open-drain output | Sinks current when asserted; requires external pullup (e.g., 10kΩ) to voltage ≤6V - enables level-shifted reset signaling |
| MR (Pin 3) | Manual reset input | Logic-low assertion forces RESET active; internal 63kΩ pullup allows NC if unused; 1μs minimum pulse width required |
| VCC (Pin 4) | Supply and monitor input | Power source and voltage-sense node; monitors itself - no external resistor divider needed |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.39V reset threshold | Eliminates external resistor network and calibration effort - reduces BOM count and layout area in space-constrained modules |
| 140ms minimum reset timeout | Ensures full μP register initialization and clock stabilization before code execution resumes - prevents boot failures in high-reliability systems |
| Open-drain RESET with 6V max pullup | Allows reset signal generation referenced to one supply while driving logic on another - critical for mixed-voltage SoC designs |
| 5μA supply current | Enables always-on supervision in energy-harvesting nodes and portable medical devices where quiescent power is tightly budgeted |
| Immunity to 100ns MR glitches | Rejects EMI-induced noise on manual reset lines without external RC filtering - simplifies front-panel switch design |
Applications
| Industrial Motor Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Microcontroller-based motor drives operating in electrically noisy factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Supervisory circuit monitoring 5V system rail and asserting reset during voltage sags caused by contactor switching or line transients. Use Value: Prevents erratic motor sequencing due to partial μP initialization; 140ms timeout accommodates slow-rising auxiliary power rails. | Use Scenario: Remote environmental sensor nodes powered by Li-SOCl₂ batteries with 10-year target lifetime. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor ensuring clean μP reset during cold-start and brownout events at end-of-battery-life. Use Value: 5μA ICC extends battery life; 4.39V threshold aligns with 4.5V cutoff of primary cell discharge curve. |
| Automotive Body Control Modules | Medical Infusion Pumps |
Use Scenario: Under-hood BCMs exposed to -40°C to +125°C ambient with load-dump transients. IC Role / Device Role / Timing Role: Voltage monitor for 5V microcontroller supply, asserting reset during cranking-induced dips below 4.39V. Use Value: Guaranteed operation over full AEC-Q100 Grade 0 temperature range; immunity to short VCC transients avoids spurious resets. | Use Scenario: Safety-critical infusion pumps requiring deterministic reset behavior during AC/DC adapter switchover. IC Role / Device Role / Timing Role: Supervisory circuit generating precise 140ms reset pulse to guarantee complete μP state machine reset before dose calculation begins. Use Value: Factory-trimmed threshold and timeout eliminate calibration drift over product lifetime - supports ISO 13485 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US43D3-T | Bidirectional reset pin architecture; supports μP reset pin used as both input and output | Required when target microcontroller uses shared reset/debug pin (e.g., some ARM Cortex-M0+ variants) | Select MAX6314US43D3-T only if bidirectional reset capability is explicitly needed; otherwise MAX6315US43D3-T offers lower cost and identical timing specs |
| TPS3808G33DBVR | Fixed 3.3V reset threshold; 200ms default timeout; 1.6V to 6.5V VCC range | Designed for 3.3V systems; lacks 4.39V threshold option and MR input glitch rejection spec | Use TPS3808G33DBVR only in 3.3V-only applications; MAX6315US43D3-T is mandatory for 4.5V nominal rails requiring precise 4.39V detection |
Compared with MAX6314US43D3-T and TPS3808G33DBVR, the MAX6315US43D3-T uniquely combines 4.39V factory-trimmed threshold, 140ms timeout, manual reset input with internal pullup, and guaranteed -40°C to +125°C operation - making it optimal for industrial 5V systems demanding deterministic brownout response.
Availability
MAX6315US43D3-T is available at Aetrix Electronics and suitable for industrial motor 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 MAX6315US43D3-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 family is part of Analog Devices' precision supervisory IC portfolio, engineered specifically for reliable power-up, brownout, and manual reset management in microprocessor-based systems operating under harsh thermal and electrical conditions.
FAQ
What is the exact reset threshold voltage of the MAX6315US43D3-T?
The MAX6315US43D3-T has a nominal reset threshold voltage of 4.39V, with tolerance of ±3.5% over the full operating temperature range (-40°C to +125°C). This value is factory-trimmed using laser-adjusted resistors and does not require external components. The threshold is specified relative to the VCC pin, which serves as both power supply and monitoring input.
Does the MAX6315US43D3-T support manual reset functionality?
Yes, the MAX6315US43D3-T includes a dedicated MR (manual reset) input on Pin 3. A logic-low pulse ≥1μs on MR forces the RESET output active regardless of VCC level. Reset remains asserted for the full 140ms timeout after MR returns high. An internal 63kΩ pullup resistor allows MR to be left unconnected if unused.
Can the RESET output of the MAX6315US43D3-T be pulled up to a voltage higher than VCC?
Yes, the MAX6315US43D3-T features an open-drain RESET output rated for voltages up to +6.0V. This allows the output to be pulled up to a higher-voltage rail (e.g., 5V) while monitoring a lower VCC (e.g., 3.3V), enabling level-shifting in mixed-supply systems. The device guarantees RESET sink capability of ≥1.2mA at VCC > 2.5V.
What is the guaranteed minimum reset timeout period for the MAX6315US43D3-T?
The MAX6315US43D3-T guarantees a minimum reset timeout period of 140ms after VCC rises above the 4.39V threshold or after MR is deasserted. This value is specified across -40°C to +125°C and represents the shortest duration RESET remains active under worst-case conditions - ensuring robust μP initialization in demanding applications.
Is the MAX6315US43D3-T qualified for automotive under-hood applications?
Yes, the MAX6315US43D3-T is fully specified from -40°C to +125°C and meets key requirements for automotive under-hood use, including guaranteed operation at maximum junction temperature, immunity to short VCC transients, and robust MR input noise rejection. While not AEC-Q200 certified out-of-box, its electrical and thermal specifications align with Grade 0 automotive subsystem requirements.
MAX6315US43D3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.3V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6315US43D3-T FAQ
1.How can I place an order for MAX6315US43D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US43D3-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6315US43D3-T reliable?
The price and inventory of MAX6315US43D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US43D3-T is usually 5 days.
3.What payment methods are accepted for MAX6315US43D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US43D3-T transactions.
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4.How is shipping managed for MAX6315US43D3-T?
MAX6315US43D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US43D3-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6315US43D3-T?
For technical support, including MAX6315US43D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US43D3-T requirements.
6.How does Aetrix verify that MAX6315US43D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6315US43D3-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6315US43D3-T meets industry standards.
7.What is the process for return or replacement of MAX6315US43D3-T?
All MAX6315US43D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US43D3-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6315US43D3-T part is unused and in its original packaging.
Return procedure for MAX6315US43D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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