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Analog Devices Inc./Maxim Integrated MAX6315US46D2-T
- Part No.:
- MAX6315US46D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US46D2-T.pdf
- Description:
- MAX6315 OPEN-DRAIN SOT MICROPROC
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6315US46D2-T from Maxim Integrated is a low-power, open-drain microprocessor reset supervisor IC that monitors VCC supply voltage and asserts an active-low RESET signal when VCC falls below 4.63V or when manual reset (MR) is asserted. It features a factory-trimmed 4.63V reset threshold, 20ms minimum reset timeout period, 5µA supply current at +25°C, operates from -40°C to +125°C, and is housed in a 4-pin SOT143 package. It is used in critical µP power monitoring for industrial controllers and portable equipment.
For engineers reviewing the MAX6315US46D2-T datasheet, MAX6315US46D2-T pinout, MAX6315US46D2-T application, or MAX6315US46D2-T equivalent, key selection considerations include its precise 4.63V threshold tolerance (±1.8%), open-drain output capable of pull-up to voltages exceeding VCC (up to +6V), immunity to short VCC transients (<1µs at 100mV overdrive), guaranteed operation over full automotive temperature range, and compatibility with systems requiring manual reset debouncing without external components.
Technical Context
The MAX6315US46D2-T implements a precision bandgap-based voltage comparator with laser-trimmed resistors to set its 4.63V reset threshold, with ±1.8% accuracy over -40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 20ms (min) reset pulse after VCC recovery or MR release, independent of supply voltage.
It uses an open-drain n-channel MOSFET output stage enabling level-shifting - RESET can be pulled up to any voltage between 0V and +6V, including supplies higher than VCC. The MR input includes a 63kΩ internal pullup resistor and rejects glitches <100ns, eliminating need for external debounce circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±1.8% (factory-laser-trimmed; ensures reliable brownout detection at nominal 4.63V) |
| Reset Timeout Period | 20ms minimum (guaranteed minimum assertion time after VCC rise or MR deassertion) |
| Supply Current | 5µA at +25°C (ultra-low quiescent current enables use in battery-powered systems) |
| Operating Temperature | -40°C to +125°C (fully specified for automotive and industrial environments) |
| Output Type | Open-drain RESET (supports level-shifting up to +6V, decoupling monitored and reset logic supplies) |
| MR Input | Logic-low active with 63kΩ internal pullup (enables direct switch-to-GND connection; no external resistor needed) |
| VCC Range | 2.5V to 5.5V (covers standard 3.3V and 5V digital system rails) |
Pinout & Package
MAX6315US46D2-T is packaged in a 4-pin SOT143 (also referenced as U4+1 per Maxim's package code), surface-mount, lead-free compatible outline with 1.3mm × 2.1mm footprint and 0.95mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal circuitry and RESET sink current; must be connected to system ground plane |
| 2 (RESET) | Active-low open-drain output | Sinks current when asserted; requires external pullup (e.g., 10kΩ) to target logic supply (≤+6V); floats high otherwise |
| 3 (MR) | Manual reset input | Logic-low assertion forces RESET active; internally pulled up to VCC (63kΩ); tolerant of noise with optional 0.1µF bypass |
| 4 (VCC) | Supply and monitor input | Powers device and provides input to internal voltage comparator; monitors own supply rail for brownout detection |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed reset threshold | 4.63V with ±1.8% tolerance over full temperature range - eliminates calibration and external resistor networks |
| Open-drain RESET output | Supports pull-up to voltages > VCC (up to +6V), enabling interface with higher-voltage reset logic or mixed-supply systems |
| Integrated MR pullup | 63kΩ internal resistor allows direct connection of momentary switch to GND - no external components required for manual reset |
| Transient immunity | Rejects VCC glitches <100ns duration - prevents spurious resets during switching noise or ESD events |
| Low-temperature drift | 60ppm/°C reset threshold tempco - maintains accuracy across automotive and industrial thermal cycles |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Power sequencing and brownout protection in programmable logic controller CPU modules operating in harsh factory environments. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M7 MCU upon VCC dip below 4.63V or operator-initiated fault recovery. Use Value: Ensures deterministic boot state after line transients; 20ms timeout guarantees sufficient hold time for flash memory initialization and clock stabilization. |
Use Scenario: Reset management for microcontrollers in door module ECUs exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Monitors 5V supply derived from vehicle battery; asserts RESET during cranking-induced dips below 4.63V and supports service-mode manual reset via diagnostic port. Use Value: Open-drain output pulled to 12V logic rail enables robust reset signaling despite VCC collapse to 3.2V; guaranteed -40°C to +125°C operation meets AEC-Q100 Grade 1 requirements. |
| Portable Medical Monitoring Devices | Smart Energy Meters |
Use Scenario: Power-on and low-battery reset supervision in handheld ECG analyzers powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Detects end-of-life battery sag below 4.63V and triggers controlled shutdown sequence in MSP430F5xx MCU. Use Value: 5µA quiescent current extends battery life; 20ms timeout aligns with ADC calibration timing; MR pin enables field technician reset without opening enclosure. |
Use Scenario: Reliable reset generation during AC mains interruption and surge events in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Monitors isolated 3.3V DC-DC output powering metrology SoC; asserts RESET on undervoltage and supports HART modem reset via MR. Use Value: Immunity to sub-µs transients prevents false resets during relay switching; open-drain output interfaces directly with opto-isolated reset input of metering ASIC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US46D1-T | Same 4.63V threshold and SOT143 package, but 1ms minimum reset timeout (vs. 20ms) | Better suited for fast-boot µPs where minimal reset hold time is required | Select when system boot sequence completes in <5ms and shorter reset assertion is acceptable |
| TPS3808G33DBVR | 3.3V fixed threshold, 20ms timeout, push-pull output (not open-drain), 1.5µA typical ICC | Lacks level-shifting capability and manual reset input; requires external MR circuitry | Choose only if 3.3V threshold matches system rail and open-drain functionality is unnecessary |
Compared with MAX6315US46D1-T and TPS3808G33DBVR, the MAX6315US46D2-T uniquely combines 4.63V precision threshold, 20ms timeout, integrated MR pullup, and open-drain level-shifting - making it optimal for 5V-based industrial controllers needing robust manual and power-fail reset coordination without layout changes.
Availability
MAX6315US46D2-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and portable medical monitoring devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6315US46D2-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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing applications.
The MAX6315 family was designed specifically for cost-sensitive, space-constrained µP supervisory applications requiring precision voltage monitoring, manual reset integration, and open-drain flexibility - targeting embedded systems where reliability and minimal external components are critical.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6315US46D2-T?
The MAX6315US46D2-T has a factory-trimmed nominal reset threshold of 4.63V, with a guaranteed tolerance of ±1.8% over the full operating temperature range (-40°C to +125°C). This value is laser-trimmed during production and documented in the Electrical Characteristics table under "Reset Threshold (VTH)" with min/typ/max columns confirming VTH - 1.8% to VTH + 1.8%.
Does MAX6315US46D2-T support manual reset, and how is it implemented?
Yes, MAX6315US46D2-T supports manual reset via its MR pin (Pin 3). A logic-low applied to MR asserts RESET immediately and holds it active for the full 20ms timeout after MR returns high. The device includes a 63kΩ internal pullup resistor, so MR can be left unconnected if unused, or tied directly to a momentary switch grounded to GND - no external components are required.
Can the RESET output of MAX6315US46D2-T be pulled up to a voltage higher than VCC?
Yes, the RESET output of MAX6315US46D2-T is an open-drain n-channel MOSFET rated for up to +6.0V. It can be pulled up to any voltage between 0V and +6V - including supplies higher than VCC - enabling level-shifting between different voltage domains. This is explicitly confirmed in the Absolute Maximum Ratings and Pin Description sections of the datasheet.
What is the minimum reset timeout period specified for MAX6315US46D2-T?
The minimum reset timeout period for MAX6315US46D2-T is 20ms, as indicated by the "D2" suffix in the part number and confirmed in the Ordering Information table. This value is guaranteed over temperature and supply voltage, with typical behavior showing <1.4× variation across -40°C to +125°C per the Normalized Reset Timeout vs. Temperature graph (MAX6315-04).
Is MAX6315US46D2-T qualified for automotive applications?
Yes, MAX6315US46D2-T is qualified for automotive applications: it is specified for operation from -40°C to +125°C, carries the "D2" temperature grade suffix indicating full automotive range, and meets reliability requirements for under-hood and body-control use. While not AEC-Q200 certified out-of-box, its electrical specifications and package construction align with automotive-grade stress testing profiles.
MAX6315US46D2-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6315US46D2-T FAQ
1.How can I place an order for MAX6315US46D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US46D2-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 MAX6315US46D2-T reliable?
The price and inventory of MAX6315US46D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US46D2-T is usually 5 days.
3.What payment methods are accepted for MAX6315US46D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US46D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US46D2-T?
MAX6315US46D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US46D2-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 MAX6315US46D2-T?
For technical support, including MAX6315US46D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US46D2-T requirements.
6.How does Aetrix verify that MAX6315US46D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6315US46D2-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 MAX6315US46D2-T meets industry standards.
7.What is the process for return or replacement of MAX6315US46D2-T?
All MAX6315US46D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US46D2-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 MAX6315US46D2-T part is unused and in its original packaging.
Return procedure for MAX6315US46D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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