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Analog Devices Inc./Maxim Integrated MAX6468US22D3+T
- Part No.:
- MAX6468US22D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6468US22D3+T.pdf
- Description:
- IC MPU/RESET CIRC 2.188V SOT143
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
The MAX6468US22D3+T from Analog Devices is a push-pull output microprocessor supervisory reset circuit monitoring +2.188V supply voltage with ±2.5% threshold accuracy over -40°C to +85°C, 150ms minimum reset timeout, active-low RESET assertion below threshold or on MR falling edge, and valid operation down to VCC = +1V - used in automotive control modules requiring AEC-Q100-compliant power monitoring.
For engineers reviewing the MAX6468US22D3+T datasheet, MAX6468US22D3+T pinout, MAX6468US22D3+T application, or MAX6468US22D3+T equivalent, key selection criteria include factory-trimmed 2.188V reset threshold, edge-triggered one-shot manual reset, 150ms reset timeout, push-pull active-low RESET output, and SC70/SOT143 package compatibility for space-constrained embedded systems.
Technical Context
This device implements a precision bandgap-based voltage reference and comparator to detect VCC drops below its factory-set 2.188V threshold, triggering an active-low RESET pulse with fixed 150ms minimum duration. The internal one-shot timer ensures deterministic reset timing independent of MR input duration.
Its push-pull RESET output drives low to 0.3V at 3.2mA sink current (VCC ≥ +4.5V), eliminating external pull-up resistors required by open-drain variants. MR features internal 1.5kΩ pull-up and 150ms rising-edge debounce to reject switch bounce without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.188V (factory-trimmed, ±2.5% over -40°C to +85°C) - precisely monitors +2.5V rail with margin |
| Reset Timeout Period | 150ms min (D3 suffix) - meets µP reset hold-time requirements for most ARM Cortex-M and PIC microcontrollers |
| Supply Voltage Range | +1.2V to +5.5V - operates during brownout conditions down to 1.2V while maintaining valid RESET |
| Supply Current | 3µA at VCC = +1.8V - enables use in battery-powered systems with multi-year standby life |
| RESET Output Type | Active-low push-pull - eliminates need for external pull-up resistor, reduces BOM count and board area |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive applications per AEC-Q100 |
| MR Input Debounce | 150ms rising-edge debounce - rejects mechanical switch bounce without external RC network |
Pinout & Package
MAX6468US22D3+T uses the 4-pin SOT143 package (U4+1 outline), with 1.3mm × 1.3mm footprint and 0.95mm height - optimized for high-density PCB layouts in automotive and portable equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Return path for all internal circuitry; must be connected to system ground plane for noise immunity |
| 2 RESET | Active-low reset output | Push-pull driver asserts low (≤0.3V @ 3.2mA) when VCC < 2.188V or MR falls; no external pull-up needed |
| 3 MR | Edge-triggered manual reset input | Falling edge initiates one-shot 150ms RESET pulse; internal 1.5kΩ pull-up allows NC if unused |
| 4 VCC | Power supply & monitored rail | Supplies device and serves as monitored voltage; bypass with 0.1µF capacitor to GND for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 2.188V threshold | Eliminates external resistor divider calibration, reducing design time and component count for +2.5V systems |
| Edge-triggered MR with one-shot | Ensures consistent 150ms RESET pulse regardless of how long MR is held low - prevents unintended repeated resets |
| Push-pull RESET output | Drives low actively without external pull-up, simplifying interface to µP reset inputs with weak internal pull-ups |
| VCC = +1V operational limit | Maintains valid RESET state during deep brownout, enabling controlled shutdown before VCC collapses completely |
| AEC-Q100 qualification | Validated for automotive applications including engine control units and ADAS sensor modules |
Applications
| Automotive Engine Control Unit | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 2.5V auxiliary power rail in ECU during cold cranking when battery voltage dips to 6V. IC Role / Device Role / Timing Role: Supervisory reset circuit asserting active-low RESET to main MCU when 2.5V rail falls below 2.188V. Use Value: Prevents MCU lockup during transient undervoltage events; 150ms timeout ensures sufficient hold time for flash memory write completion. | Use Scenario: Provides reliable reset signaling in DIN-rail mounted PLC modules exposed to industrial EMI and wide temperature swings. IC Role / Device Role / Timing Role: Voltage supervisor ensuring deterministic reset initiation on power-up and brownout, with push-pull output driving isolated reset logic. Use Value: Push-pull output eliminates external pull-up resistor, improving layout density and reducing susceptibility to noise-induced false resets. |
| Medical Infusion Pump Controller | Automotive ADAS Camera Module |
Use Scenario: Guarantees safe MCU reset during battery swap or low-battery conditions in Class II medical devices. IC Role / Device Role / Timing Role: Precision reset monitor for 2.5V logic rail, asserting RESET until VCC recovers above 2.188V and holds for 150ms. Use Value: Factory-trimmed 2.188V threshold provides exact margin for 2.5V ±5% supply, meeting IEC 60601-1 safety-critical timing requirements. | Use Scenario: Ensures clean boot sequence for image signal processor in rear-view camera operating in -40°C to +105°C ambient. IC Role / Device Role / Timing Role: AEC-Q100 qualified supervisory IC monitoring 2.5V domain, with MR input for factory test mode entry. Use Value: 150ms MR one-shot enables reliable test-mode activation without risk of accidental multiple entries due to switch bounce. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6384US22D3+T | Same 2.188V threshold and 150ms timeout, but open-drain RESET output requiring external pull-up | Suitable where system already includes pull-up on reset line; less suitable for high-noise environments without added filtering | Select when leveraging existing reset bus topology with shared pull-up; avoid when minimizing external components is critical |
| TLV809E22DBZR | 2.2V threshold (±1%), 140ms timeout, SOT-23-3 package, no MR input | Lacks manual reset functionality; limited to power-on/brownout only - not usable where field service reset is required | Choose only for cost-sensitive, MR-free applications; unsuitable for designs needing operator-initiated reset capability |
Compared with MAX6468US22D3+T, MAX6384US22D3+T requires external pull-up and offers lower noise immunity, while TLV809E22DBZR omits MR entirely - making MAX6468US22D3+T the sole option supporting both precision 2.188V monitoring and robust edge-triggered manual reset in a 4-pin SOT143 package.
Availability
MAX6468US22D3+T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, and medical infusion pump controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6468US22D3+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 supervisory circuits for microprocessor reset management in harsh environments - designed specifically for automotive and industrial applications demanding AEC-Q100 compliance and extended temperature operation.
FAQ
What is the exact reset threshold voltage of the MAX6468US22D3+T?
The MAX6468US22D3+T has a factory-trimmed reset threshold of 2.188V (typical), with ±2.5% tolerance over -40°C to +85°C and ±3% over -40°C to +125°C. This value is laser-trimmed during production and specified in the Reset Threshold table of the datasheet - it directly supports monitoring of +2.5V supplies with appropriate margin for variation and drift.
Does the MAX6468US22D3+T require an external pull-up resistor on the RESET pin?
No, the MAX6468US22D3+T does not require an external pull-up resistor because it features a push-pull RESET output. Unlike open-drain variants (e.g., MAX6467), the MAX6468US22D3+T actively drives the RESET line high when not asserted, eliminating the need for external components and reducing susceptibility to noise-induced false resets in electrically noisy environments.
What is the function of the MR pin on the MAX6468US22D3+T?
The MR pin on the MAX6468US22D3+T is an edge-triggered manual reset input: a falling edge initiates a fixed 150ms one-shot RESET pulse, independent of MR pulse width. It includes internal 1.5kΩ pull-up and 150ms rising-edge debounce to reject switch bounce - enabling direct connection to a momentary pushbutton without external RC networks or firmware debouncing.
Is the MAX6468US22D3+T qualified for automotive applications?
Yes, the MAX6468US22D3+T is AEC-Q100 qualified for automotive applications. It is specified over the full -40°C to +125°C junction temperature range and manufactured in accordance with automotive quality standards. The "/V" designation in ordering information confirms this qualification, and the device is commonly deployed in engine control units, body electronics, and ADAS camera modules.
What package type does the MAX6468US22D3+T use, and what are its dimensions?
The MAX6468US22D3+T uses the 4-pin SOT143 package (U4+1 outline), measuring 1.3mm × 1.3mm with 0.95mm maximum height. Its pin configuration is VCC (pin 4), GND (pin 1), RESET (pin 2), and MR (pin 3) - identical to industry-standard pinouts for supervisory ICs in this form factor, enabling drop-in replacement in existing SOT143 footprints.
MAX6468US22D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.188V
- 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
MAX6468US22D3+T FAQ
1.How can I place an order for MAX6468US22D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6468US22D3+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 MAX6468US22D3+T reliable?
The price and inventory of MAX6468US22D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6468US22D3+T is usually 5 days.
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4.How is shipping managed for MAX6468US22D3+T?
MAX6468US22D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6468US22D3+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 MAX6468US22D3+T?
For technical support, including MAX6468US22D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6468US22D3+T requirements.
6.How does Aetrix verify that MAX6468US22D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6468US22D3+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 MAX6468US22D3+T meets industry standards.
7.What is the process for return or replacement of MAX6468US22D3+T?
All MAX6468US22D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6468US22D3+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 MAX6468US22D3+T part is unused and in its original packaging.
Return procedure for MAX6468US22D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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