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Analog Devices Inc./Maxim Integrated MAX6468US29D3+T
- Part No.:
- MAX6468US29D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6468US29D3+T.pdf
- Description:
- IC MPU/RESET CIRC 2.925V SOT143
- Quantity:
- Payment:
- Shipping:
Inventory:4,674
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Product details
Overview
MAX6468US29D3+T from Analog Devices is a push-pull output microprocessor supervisory reset circuit monitoring +2.925V supply voltage with 150ms minimum reset timeout, active-low RESET assertion, and edge-triggered manual reset input - used in automotive control modules to ensure deterministic µP reset during cold-crank brownout events.
For engineers reviewing the MAX6468US29D3+T datasheet, MAX6468US29D3+T pinout, MAX6468US29D3+T application, or MAX6468US29D3+T equivalent, key selection criteria include factory-trimmed 2.925V threshold tolerance (±2.5% over -40°C to +85°C), VCC-operated down to +1.0V, 3µA supply current at 1.8V, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The MAX6468US29D3+T implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below its factory-set 2.925V threshold. Its internal one-shot timer triggers on MR falling edges and enforces fixed 150ms–300ms reset pulse width independent of MR signal duration.
It features dual timing paths: VCC reset timeout (150ms min) and MR reset timeout (150ms min), both guaranteed over -40°C to +125°C. The push-pull RESET output drives low to 0.3V at 3.2mA sink current and remains valid while VCC ≥ +1V, enabling robust operation during deep brownouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.925V (typ), ±2.5% over -40°C to +85°C - matches nominal +3.0V rail with 2.5% margin for automotive voltage variation |
| Reset Timeout Period | 150ms (min) - ensures µP reset hold time exceeds boot ROM initialization requirements |
| Supply Current | 3µA at VCC = +1.8V - enables use in always-on battery-backed systems without significant drain |
| Operating Voltage Range | +1.0V to +5.5V - guarantees functional RESET assertion even during severe brownout down to 1V |
| Output Type | Active-low push-pull - eliminates need for external pullup resistor, reduces BOM count and PCB area |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive applications per AEC-Q100 |
| MR Glitch Rejection | 100ns - rejects EMI-induced noise on manual reset line without external RC filtering |
Pinout & Package
MAX6468US29D3+T uses the 4-pin SOT143 package (U4+1 outline, 21-0052), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and RoHS-compliant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Return path for internal biasing and RESET output sink current; must be connected to system ground plane |
| 2 RESET | Active-low reset output | Push-pull driver asserts low (≤0.3V @ 3.2mA) during VCC undervoltage or MR edge; directly interfaces µP /RESET pin |
| 3 MR | Manual reset input | Edge-triggered input with 1.5kΩ internal pullup; falling edge initiates fixed 150ms one-shot reset pulse |
| 4 VCC | Power and monitored supply | Supplies device and serves as monitored rail; bypass with 0.1µF capacitor to GND for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.925V threshold | Eliminates external resistor divider; supports +3.0V systems with ±2.5% accuracy across automotive temperature range |
| Edge-triggered MR with one-shot timing | Prevents repeated resets from switch bounce; guarantees single 150ms pulse per button press regardless of contact duration |
| Push-pull RESET output | Reduces component count by removing external pullup; improves noise immunity vs. open-drain in high-EMI environments |
| VCC-operated down to +1.0V | Ensures valid RESET assertion during deep brownout conditions common in automotive start-stop systems |
| AEC-Q100 qualified | Validated for automotive applications including engine control units, body controllers, and ADAS power domains |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Power supply monitoring during cold-crank where battery dips to 6V for 500ms. IC Role / Device Role / Timing Role: Supervisory reset generator asserting /RESET until VCC recovers above 2.925V and holds for 150ms. Use Value: Prevents ECU firmware corruption by ensuring µP remains held in reset until stable 3.0V rail is re-established. |
Use Scenario: Fieldbus node powered from isolated 3.3V DC-DC converter subject to load transients. IC Role / Device Role / Timing Role: Brownout detector with manual reset override via front-panel button. Use Value: Guarantees deterministic recovery after power interruption without requiring µP firmware intervention. |
| Medical Infusion Pump Controller | Telematics Control Unit (TCU) |
Use Scenario: Battery-powered operation with low-voltage cutoff at 2.8V to preserve safety-critical runtime. IC Role / Device Role / Timing Role: Precision voltage monitor triggering controlled shutdown sequence upon VCC drop below 2.925V. Use Value: Enables graceful state save before power loss, meeting IEC 62304 Class C software safety requirements. |
Use Scenario: Always-on cellular modem module requiring reliable reset during vehicle ignition cycling. IC Role / Device Role / Timing Role: Reset supervisor with AEC-Q100 qualification and 125°C operation for under-dash mounting. Use Value: Eliminates spurious resets caused by alternator ripple or load dump transients in automotive electrical systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6386US29D3+T | Same 2.925V threshold and 150ms timeout, but open-drain output requiring external pullup | Lacks push-pull drive strength; unsuitable where low-impedance RESET signaling is required | Select when legacy board design already includes pullup or when interfacing with multiple loads sharing RESET bus |
| TLV809E29DBZR | 2.93V threshold, 140ms timeout, 1.8–6V VCC range, but only rated to +105°C (not AEC-Q100) | Not qualified for automotive under-hood use; lacks MR debounce and glitch rejection specs | Acceptable for industrial or consumer applications where extended temperature and automotive qualification are not required |
Compared with MAX6468US29D3+T, MAX6386US29D3+T requires external pullup and offers lower drive capability, while TLV809E29DBZR omits AEC-Q100 validation and automotive temperature support - making MAX6468US29D3+T the only option meeting full automotive reset integrity requirements.
Availability
MAX6468US29D3+T is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, medical infusion pumps, and telematics control units requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6468US29D3+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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The MAX6467/MAX6468 product line delivers automotive-grade supervisory circuits with factory-trimmed thresholds and robust manual reset timing - engineered specifically for mission-critical power monitoring in harsh environments.
FAQ
What is the exact reset threshold voltage of MAX6468US29D3+T and how is it specified over temperature?
The MAX6468US29D3+T has a factory-trimmed typical reset threshold of 2.925V, with ±2.5% tolerance over -40°C to +85°C and ±3% over +85°C to +125°C. This specification ensures reliable detection of brownout on nominal +3.0V rails across full automotive operating conditions, and is verified per the Reset Threshold table in the official Analog Devices datasheet.
Does MAX6468US29D3+T support manual reset functionality, and how does its edge-triggered behavior work?
Yes, MAX6468US29D3+T features an edge-triggered manual reset (MR) input with built-in 150ms–300ms one-shot timing. A falling edge on MR initiates a fixed-duration low pulse on RESET, independent of MR signal width. Internal debounce ignores subsequent edges within 150ms of MR rising, eliminating switch bounce issues without external components.
What output type does MAX6468US29D3+T use, and why does it matter for system design?
MAX6468US29D3+T uses an active-low push-pull RESET output, meaning it actively drives low and high without requiring an external pullup resistor. This reduces BOM cost and PCB area, improves noise immunity in EMI-prone environments like automotive cabins, and provides stronger drive capability (3.2mA sink) than open-drain alternatives.
Is MAX6468US29D3+T qualified for automotive applications, and what standards does it meet?
Yes, MAX6468US29D3+T is AEC-Q100 qualified for automotive use and specified over -40°C to +125°C. It meets stringent automotive reliability requirements including thermal cycling, humidity testing, and ESD robustness - making it suitable for engine control units, body controllers, and telematics modules mounted in under-hood or cabin locations.
What is the minimum supply voltage at which MAX6468US29D3+T guarantees valid RESET output operation?
MAX6468US29D3+T guarantees valid RESET output operation down to VCC = +1.0V. This means the RESET signal remains asserted (low) with defined timing and voltage levels even during deep brownout conditions - a critical feature for automotive start-stop systems where battery voltage can dip below 2.0V during cranking.
MAX6468US29D3+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:
- 2.925V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6468US29D3+T FAQ
1.How can I place an order for MAX6468US29D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6468US29D3+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 MAX6468US29D3+T reliable?
The price and inventory of MAX6468US29D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6468US29D3+T is usually 5 days.
3.What payment methods are accepted for MAX6468US29D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6468US29D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6468US29D3+T?
MAX6468US29D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6468US29D3+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 MAX6468US29D3+T?
For technical support, including MAX6468US29D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6468US29D3+T requirements.
6.How does Aetrix verify that MAX6468US29D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6468US29D3+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 MAX6468US29D3+T meets industry standards.
7.What is the process for return or replacement of MAX6468US29D3+T?
All MAX6468US29D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6468US29D3+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 MAX6468US29D3+T part is unused and in its original packaging.
Return procedure for MAX6468US29D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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