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Analog Devices Inc./Maxim Integrated MAX6468US46D3-T
- Part No.:
- MAX6468US46D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6468US46D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:11,415
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Product details
Overview
MAX6468US46D3-T from Maxim Integrated is a push-pull output microprocessor supervisory reset circuit monitoring +4.625V supply voltage with ±1.5% threshold accuracy at +25°C, 150ms minimum reset timeout, and edge-triggered manual reset. It ensures reliable power-on reset and brownout detection in automotive-grade embedded systems operating from -40°C to +125°C.
For engineers reviewing the MAX6468US46D3-T datasheet, MAX6468US46D3-T pinout, MAX6468US46D3-T application, or MAX6468US46D3-T equivalent, this page delivers verified electrical parameters, package mapping to SOT143-4, reset timing behavior under VCC transients, and validated alternatives for +4.6V supply supervision in harsh-temperature environments.
Technical Context
The MAX6468US46D3-T implements a precision bandgap-based voltage comparator with factory-trimmed threshold of 4.625V (typ), supporting immunity to short VCC transients down to 100ns glitch rejection. Its internal one-shot timer generates fixed 150ms (min) reset assertion on both VCC drop below threshold and MR falling edge.
It features an active-low push-pull RESET output capable of sourcing 500µA at 0.8×VCC (VCC ≥ +2.5V) and sinking 3.2mA at VOL ≤ 0.3V (VCC ≥ +4.5V), with valid operation down to VCC = +1V. The MR input includes 1.5kΩ internal pullup and 150ms rising-edge debounce to suppress switch bounce.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.625V (typ), ±1.5% tolerance at +25°C - precisely matches +5.0V rail supervision with margin for tolerance drift |
| Reset Timeout Period | 150ms (min) - meets minimum reset hold time requirements for ARM Cortex-M and similar MCUs |
| Supply Current | 3µA at VCC = +1.8V - enables ultra-low-power battery-backed systems without compromising supervision integrity |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial control applications |
| RESET Output Type | Active-low push-pull - eliminates need for external pullup resistor, simplifies PCB layout and reduces BOM count |
| VCC Range | +1.0V to +5.5V - supports operation during deep brownout while maintaining valid RESET assertion down to +1V |
| MR Glitch Rejection | 100ns - rejects EMI-induced noise on manual reset line without external RC filtering |
Pinout & Package
MAX6468US46D3-T is housed in a 4-pin SOT143-4 package (JEDEC TO-253-4), measuring 2.9mm × 1.3mm × 1.0mm, with gull-wing leads and RoHS-compliant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Primary return path for internal bias and RESET sink current; must be connected directly to system ground plane |
| 2 - RESET | Active-low reset output | Push-pull driver asserts low during VCC brownout or MR edge trigger; drives µP /RESET pin directly without pullup |
| 3 - MR | Edge-triggered manual reset input | Falling edge initiates 150ms one-shot reset pulse; internal 1.5kΩ pullup allows NC if unused |
| 4 - VCC | Power and monitored supply | Supplies device and serves as sensed rail; requires 0.1µF ceramic bypass capacitor to GND for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.625V threshold | Factory-trimmed to ±1.5% at +25°C and ±3% over full -40°C to +125°C range - eliminates calibration overhead in production test |
| Edge-triggered MR with debounce | 150ms rising-edge debounce window prevents false resets from mechanical switch bounce or EMI coupling |
| 150ms min reset timeout | Guaranteed minimum assertion time ensures µP core and peripherals fully initialize before release |
| Push-pull RESET output | Drives low and high actively - removes dependency on external pullup, reduces board space, and improves noise margin |
| Valid operation down to VCC = +1V | Ensures deterministic reset state during deep undervoltage events where other supervisors fail silently |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitors +5V main supply in engine control unit exposed to wide temperature swings and load dump transients. IC Role / Device Role / Timing Role: Supervisory reset generator ensuring MCU enters known state after cold crank, battery disconnect, or alternator surge. Use Value: 4.625V threshold provides 375mV headroom above nominal +5.0V rail, accommodating worst-case tolerance stack-up while rejecting <100ns glitches. |
Use Scenario: Provides power-on and brownout reset for ARM-based programmable logic controller module operating in factory-floor environments. IC Role / Device Role / Timing Role: Voltage monitor and manual reset coordinator with deterministic 150ms reset hold time synchronized to µP boot sequence. Use Value: Push-pull RESET eliminates external pullup, reducing component count and improving reliability in high-vibration industrial enclosures. |
| Medical Infusion Pump Controller | DSL Modem Power Management |
|
Use Scenario: Ensures fail-safe reset of safety-critical microcontroller during AC/DC adapter brownout or battery switchover. IC Role / Device Role / Timing Role: Fault-tolerant reset supervisor with guaranteed operation down to VCC = +1V and automotive-grade temperature range. Use Value: Valid RESET output at VCC = +1V prevents undefined MCU behavior during gradual power collapse, meeting IEC 62304 Class C requirements. |
Use Scenario: Supervises +5V supply in DSL modem front-end, interfacing with xDSL PHY and Ethernet MAC controllers. IC Role / Device Role / Timing Role: Single-supply reset generator with edge-triggered MR for field-service reset and transient-immune brownout detection. Use Value: 100ns MR glitch rejection prevents spurious resets from data-line crosstalk or ESD events on adjacent traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6386US46D3-T | Same 4.625V threshold and 150ms timeout, but open-drain RESET output requiring external pullup | Lacks push-pull drive strength; unsuitable where µP /RESET pin has weak internal pullup or high capacitive loading | Select when legacy design uses open-drain topology or shares RESET bus with multiple devices |
| TPS3808G33DBVR | 3.3V fixed threshold (not adjustable), 200ms min timeout, higher quiescent current (8µA vs. 3µA at 1.8V) | Not suitable for +5V rail supervision; designed for lower-voltage domains like I/O supply or FPGA configuration rails | Select only for 3.3V systems; not a functional substitute for MAX6468US46D3-T's +4.625V monitoring capability |
Compared with MAX6468US46D3-T, MAX6386US46D3-T offers identical threshold and timing but demands external pullup, increasing BOM and layout complexity; TPS3808G33DBVR operates at wrong voltage level and cannot supervise +5V rails, making it non-interchangeable without redesign.
Availability
MAX6468US46D3-T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pump controllers, and DSL modem power management requiring stable component supply across extended temperature ranges.
Supply support for MAX6468US46D3-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) designs precision analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX6467/MAX6468 product line delivers highly accurate, low-power supervisory circuits optimized for microprocessor reset generation in harsh thermal and electrical environments.
FAQ
What is the exact reset threshold voltage of MAX6468US46D3-T and how tightly is it specified?
The MAX6468US46D3-T has a factory-trimmed reset threshold of 4.625V (typical), with guaranteed tolerance of ±1.5% at +25°C and ±3% over the full -40°C to +125°C operating range. This precise value is confirmed in the Reset Threshold table of the official datasheet and aligns with +5.0V supply supervision requirements including margin for manufacturing tolerance and temperature drift. The "46" suffix in MAX6468US46D3-T explicitly denotes this 4.625V threshold.
Does MAX6468US46D3-T support manual reset functionality, and how does its edge-triggered behavior work?
Yes, MAX6468US46D3-T features an edge-triggered manual reset (MR) input that responds only to the falling edge of the MR signal, initiating a fixed 150ms (min) one-shot reset pulse on the RESET output. Internal timing ignores subsequent MR transitions within the 150ms debounce window after MR rises, preventing false resets from switch bounce. The MR pin includes a 1.5kΩ internal pullup resistor to VCC, allowing it to be left unconnected if unused - no external components are required for basic operation.
What is the RESET output structure of MAX6468US46D3-T, and why does it matter for system design?
MAX6468US46D3-T uses an active-low push-pull RESET output, meaning it actively drives both high and low states without requiring an external pullup resistor. This differs from open-drain variants like MAX6467 and eliminates BOM items, reduces PCB footprint, improves noise immunity on the reset line, and ensures robust drive capability into heavy capacitive loads (e.g., long traces or multiple µP /RESET inputs). The push-pull architecture guarantees VOL ≤ 0.3V at 3.2mA sink and VOH ≥ 0.8×VCC at 500µA source.
Can MAX6468US46D3-T operate reliably during severe supply voltage droop, and down to what VCC level does RESET remain valid?
Yes, MAX6468US46D3-T maintains valid RESET assertion down to VCC = +1V, ensuring deterministic behavior during deep brownout conditions where many supervisors cease functioning. Its internal circuitry remains operational and correctly asserts RESET low as long as VCC stays above +1V, providing critical fail-safe behavior in automotive and industrial applications. This specification is guaranteed across the full -40°C to +125°C temperature range and is distinct from typical "VCC > 1.2V" minimums found in competing devices.
What package type and footprint does MAX6468US46D3-T use, and is it RoHS-compliant?
MAX6468US46D3-T is supplied in a 4-pin SOT143-4 package (JEDEC TO-253-4), with dimensions of 2.9mm × 1.3mm × 1.0mm and gull-wing leads. The "-T" suffix confirms tape-and-reel packaging, and the part is RoHS-compliant (lead-free), as indicated by Maxim's standard lead-free qualification for this family. Land pattern requirements follow Maxim's outline 21-0052 and land pattern number 90-0183, available on maximintegrated.com/packages.
MAX6468US46D3-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:
- 4.625V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-4
MAX6468US46D3-T FAQ
1.How can I place an order for MAX6468US46D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6468US46D3-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 MAX6468US46D3-T reliable?
The price and inventory of MAX6468US46D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6468US46D3-T is usually 5 days.
3.What payment methods are accepted for MAX6468US46D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6468US46D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6468US46D3-T?
MAX6468US46D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6468US46D3-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 MAX6468US46D3-T?
For technical support, including MAX6468US46D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6468US46D3-T requirements.
6.How does Aetrix verify that MAX6468US46D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6468US46D3-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 MAX6468US46D3-T meets industry standards.
7.What is the process for return or replacement of MAX6468US46D3-T?
All MAX6468US46D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6468US46D3-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 MAX6468US46D3-T part is unused and in its original packaging.
Return procedure for MAX6468US46D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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