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Analog Devices Inc./Maxim Integrated MAX6468US16D3+T
- Part No.:
- MAX6468US16D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6468US16D3+T.pdf
- Description:
- IC MPU/RESET CIRC 1.575V SOT143
- Quantity:
- Payment:
- Shipping:
Inventory:2,499
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Product details
Overview
MAX6468US16D3+T from Analog Devices is a push-pull output microprocessor supervisory reset circuit in SOT143-4 package, monitoring +1.8V supplies with factory-trimmed 1.575V reset threshold (±1.5% at +25°C), 150ms min VCC and MR reset timeout, and guaranteed operation down to VCC = +1V. It serves as a system-level power-on reset and brownout detector in automotive ECUs and industrial controllers.
For engineers reviewing the MAX6468US16D3+T datasheet, MAX6468US16D3+T pinout, MAX6468US16D3+T application, or MAX6468US16D3+T equivalent, key selection criteria include its AEC-Q100 qualified automotive temperature range (–40°C to +125°C), edge-triggered manual reset with 150ms one-shot pulse, push-pull active-low RESET output, low 3µA supply current at 1.8V, and immunity to <100ns MR glitches.
Technical Context
The MAX6468US16D3+T implements a precision bandgap-based voltage reference and comparator to detect VCC falling below 1.575V, triggering an immediate active-low RESET assertion. Its internal timing circuitry generates fixed 150ms (min) reset timeout periods for both VCC recovery and MR falling-edge events, independent of supply voltage.
It features an integrated 1.5kΩ pullup resistor on MR, accepts TTL/CMOS logic levels, and provides 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), eliminating external pullup components required by open-drain variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.575V (min), ±1.5% tolerance at +25°C - precisely matches +1.8V supply brownout detection with margin |
| VCC Operating Range | +1.2V to +5.5V - supports wide input range while maintaining valid RESET down to +1V |
| Reset Timeout Period | 150ms (min) - meets minimum reset hold time requirements for most ARM Cortex-M and PIC microcontrollers |
| Supply Current | 3µA at VCC = +1.8V - enables ultra-low-power operation in battery-backed systems |
| MR Glitch Rejection | 100ns - rejects contact bounce and EMI-induced noise on manual reset line without external RC |
| Output Type | Active-low push-pull - drives RESET directly without external pullup, simplifying PCB layout and reducing BOM count |
| Temperature Range | –40°C to +125°C - qualified per AEC-Q100 for under-hood automotive applications |
Pinout & Package
Package: 4-pin SOT143 (U4+1, outline 21-0052), 1.3mm × 2.1mm footprint, lead(Pb)-free/RoHS-compliant (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Return path for all internal circuitry; must be connected to system ground plane with low-inductance path |
| 2 RESET | Active-low reset output | Push-pull driver asserts low during VCC brownout or MR edge; sinks up to 3.2mA, sources 500µA |
| 3 MR | Edge-triggered manual reset input | Falling edge initiates 150ms one-shot reset pulse; internal 1.5kΩ pullup allows direct switch-to-GND connection |
| 4 VCC | Power and monitored supply | Provides operating power and is the voltage being supervised; requires 0.1µF bypass capacitor to GND |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.575V threshold | Eliminates need for external resistor divider; ensures accurate +1.8V supply monitoring across temperature |
| Edge-triggered MR with one-shot timing | Guarantees single 150ms reset pulse even if switch remains closed - prevents repeated resets during maintenance |
| Push-pull RESET output | Drives microcontroller reset pin directly without pullup resistor - reduces component count and layout area |
| 100ns MR glitch rejection | Rejects mechanical switch bounce and EMI transients - removes need for external debounce circuitry |
| Valid RESET down to VCC = +1V | Ensures clean reset assertion during deep brownout or slow power-down sequences in automotive systems |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 1.8V core supply for MCU and CAN transceiver in engine control unit exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Power-on reset generator and brownout detector with AEC-Q100 qualification and –40°C to +125°C operation. Use Value: Prevents MCU lockup during cold cranking voltage sag by asserting RESET until VCC recovers above 1.575V for ≥150ms. | Use Scenario: Supervises 1.8V FPGA configuration voltage in modular PLC base unit with field-serviceable manual reset button. IC Role / Device Role / Timing Role: Edge-triggered manual reset initiator and supply monitor with push-pull output driving FPGA PROG_B pin. Use Value: Delivers clean 150ms one-shot reset pulse on button press - avoids FPGA configuration corruption from switch bounce. |
| Medical Infusion Pump Controller | DSL Modem SoC Power Management |
Use Scenario: Ensures safe shutdown and restart of 1.8V ARM-based controller during battery swap or AC loss in Class II medical device. IC Role / Device Role / Timing Role: Low-current (3µA) supervisory circuit enabling >5-year shelf life in backup battery mode. Use Value: Maintains valid RESET assertion down to VCC = +1V - guarantees controlled reset during gradual battery depletion. | Use Scenario: Monitors 1.8V digital supply for DSL PHY and DSP in residential broadband modem with space-constrained PCB. IC Role / Device Role / Timing Role: Compact (SOT143) reset supervisor replacing discrete RC network and Schmitt trigger. Use Value: Reduces board area by 70% vs. discrete solution while improving reset accuracy and temperature stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US29D3+T | Higher 2.925V reset threshold; same SOT143 package and 150ms timeout | Designed for +3.3V supply monitoring, not +1.8V systems | Select only when supervising 3.3V rails - incompatible for 1.8V brownout detection |
| TLV809EC29DBVR | 2.93V threshold, 140ms timeout, SOT-23-3 package, no MR input | Lacks manual reset functionality and operates only over –40°C to +125°C with reduced accuracy | Use where MR is unnecessary and board space is critical; not suitable for systems requiring field-service reset |
Compared with MAX6468US16D3+T, MAX6315US29D3+T targets higher-voltage rails and TLV809EC29DBVR omits manual reset - neither provides the precise 1.575V threshold, edge-triggered MR, or push-pull drive needed for reliable +1.8V system supervision in automotive or industrial environments.
Availability
MAX6468US16D3+T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pump controllers, and DSL modem SoC power management requiring stable component supply across extended temperature ranges.
Supply support for MAX6468US16D3+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 MAX6467/MAX6468 product line delivers precision, low-power, AEC-Q100 qualified supervisory circuits for mission-critical reset generation in automotive and industrial systems where reliability under voltage transients and temperature extremes is essential.
FAQ
What is the exact reset threshold voltage of the MAX6468US16D3+T and how does it vary with temperature?
The MAX6468US16D3+T has a factory-trimmed nominal reset threshold of 1.575V, with ±1.5% tolerance at +25°C. Over the full –40°C to +125°C range, threshold variation is ±2.5% (–40°C to +85°C) and ±3% (+85°C to +125°C). This ensures robust +1.8V supply monitoring across automotive and industrial thermal profiles without external calibration.
Does the MAX6468US16D3+T require an external pullup resistor on the RESET pin?
No, the MAX6468US16D3+T uses a push-pull RESET output, so no external pullup resistor is required. Unlike the open-drain MAX6467 variant, the MAX6468US16D3+T actively drives RESET high when not asserted, simplifying interface to microcontrollers and reducing BOM count and PCB area.
How does the manual reset (MR) function work on the MAX6468US16D3+T?
The MR input on the MAX6468US16D3+T is edge-triggered: a falling edge initiates a fixed 150ms (min) one-shot RESET pulse, regardless of MR duration. Internal 1.5kΩ pullup allows direct connection of a momentary switch to GND. Switch bounce is rejected via 150ms rising-edge debounce, ensuring only one reset per button press.
Is the MAX6468US16D3+T qualified for automotive applications?
Yes, the MAX6468US16D3+T is AEC-Q100 qualified and specified for operation from –40°C to +125°C. Its SOT143 package, precision threshold stability, and immunity to short VCC transients make it suitable for under-hood automotive applications including engine control units and body electronics modules.
What is the supply current consumption of the MAX6468US16D3+T at 1.8V?
The MAX6468US16D3+T draws only 3µA (typical) and up to 7.5µA (max) at VCC = +1.8V and TA = +25°C. This ultra-low quiescent current enables use in battery-powered or energy-harvesting systems where multi-year standby life is required.
MAX6468US16D3+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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.575V
- 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-143-4
MAX6468US16D3+T FAQ
1.How can I place an order for MAX6468US16D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6468US16D3+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 MAX6468US16D3+T reliable?
The price and inventory of MAX6468US16D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6468US16D3+T is usually 5 days.
3.What payment methods are accepted for MAX6468US16D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6468US16D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6468US16D3+T?
MAX6468US16D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6468US16D3+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 MAX6468US16D3+T?
For technical support, including MAX6468US16D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6468US16D3+T requirements.
6.How does Aetrix verify that MAX6468US16D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6468US16D3+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 MAX6468US16D3+T meets industry standards.
7.What is the process for return or replacement of MAX6468US16D3+T?
All MAX6468US16D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6468US16D3+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 MAX6468US16D3+T part is unused and in its original packaging.
Return procedure for MAX6468US16D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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