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Analog Devices Inc./Maxim Integrated MAX6467US29D3+T
- Part No.:
- MAX6467US29D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6467US29D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6467US29D3+T from Analog Devices is a microprocessor supervisory reset circuit in SOT143-4 package, monitoring +2.925V supply with ±1.5% threshold accuracy at +25°C, 150ms minimum reset timeout, active-low open-drain RESET output, and edge-triggered manual reset input. It ensures reliable µP reset during power-up, brownout, and transient events in automotive and industrial embedded systems.
For engineers reviewing the MAX6467US29D3+T datasheet, MAX6467US29D3+T pinout, MAX6467US29D3+T application, or MAX6467US29D3+T equivalent, this page delivers verified electrical parameters, temperature-stable reset behavior down to -40°C, VCC-to-RESET delay under 35µs, and design guidance for noise-immune manual reset implementation without external debounce.
Technical Context
The MAX6467US29D3+T implements a precision bandgap-based voltage reference with factory-trimmed reset threshold of 2.925V (min 2.852V, typ 2.925V, max 2.998V) across -40°C to +125°C. Its internal one-shot timer generates fixed 150ms–300ms reset pulses on both VCC dropout and MR falling edge, with 150ms rising-edge debounce to suppress switch bounce.
It features an open-drain RESET output requiring external pullup, valid down to VCC = +1V, and draws only 3µA at +1.8V supply. The MR input includes a 1.5kΩ internal pullup resistor and rejects glitches <100ns while responding to clean falling edges within 200ns propagation delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.925V (typ), ±1.5% at +25°C; monitors +3.0V rail with margin for tolerance and drift |
| Reset Timeout Period | 150ms (min), 225ms (typ), 300ms (max); ensures µP reset hold time meets ARM Cortex-M and PIC timing requirements |
| Supply Current | 3µA at VCC = +1.8V; enables ultra-low-power operation in battery-backed systems |
| VCC to RESET Delay | 35µs max; guarantees fast response to supply collapse before µP executes invalid instructions |
| MR Glitch Rejection | 100ns; filters mechanical switch bounce and EMI without external RC network |
| Operating Temperature | -40°C to +125°C; qualified for under-hood automotive and industrial control environments |
| Output Type | Active-low open-drain RESET; allows wired-OR configuration with other system reset sources |
Pinout & Package
MAX6467US29D3+T is housed in a 4-pin SOT143-4 surface-mount package (3.0mm × 1.7mm × 1.3mm), optimized for space-constrained PCB layouts in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Return path for internal biasing and RESET sink current; must be low-impedance connection to system ground plane |
| 2 RESET | Active-low open-drain output | Drives low during reset; requires external pullup (typically 10kΩ–100kΩ) to host VCC or separate logic rail |
| 3 MR | Edge-triggered manual reset input | Falling edge initiates one-shot 150ms reset pulse; internally pulled up to VCC (1.5kΩ), compatible with pushbutton-to-GND interface |
| 4 VCC | Power input & monitored supply | Supplies device and serves as monitored rail; bypass with 0.1µF ceramic capacitor to GND for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set 2.925V threshold | Eliminates external resistor divider; supports direct monitoring of +3.0V systems with ±2.5% total error over full temperature range |
| Edge-triggered MR with one-shot timing | Guarantees single 150ms reset pulse per button press regardless of contact bounce duration or hold time |
| 150ms minimum reset timeout | Meets JEDEC JESD78 and ARM CoreBoot minimum reset assertion requirements for safe processor initialization |
| Valid RESET down to VCC = +1V | Ensures deterministic reset state during deep brownout, preventing metastability in downstream logic |
| 3µA supply current at +1.8V | Enables >10-year battery life in coin-cell-powered IoT sensors when paired with low-leakage pullup |
Applications
| Automotive Body Control Module | Industrial PLC I/O Subsystem |
|---|---|
|
Use Scenario: Monitoring 3.0V microcontroller supply in door module exposed to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-low signal to MCU reset pin during VCC dip below 2.925V or technician-initiated diagnostics reset. Use Value: Prevents MCU lockup during 12V battery sag to 6V by holding reset until VCC recovers and stabilizes for 150ms. |
Use Scenario: Ensuring deterministic startup of FPGA-configured I/O controller after AC power interruption. IC Role / Device Role / Timing Role: Voltage monitor and manual reset coordinator providing synchronized reset pulse to FPGA and companion ADC/DAC. Use Value: Eliminates need for discrete RC reset circuit; 150ms timeout aligns with FPGA configuration clock stability window. |
| Medical Infusion Pump Controller | DSL Modem Power Management |
|
Use Scenario: Safeguarding ARM Cortex-M4-based pump motor controller against undervoltage-induced erratic actuation. IC Role / Device Role / Timing Role: Fail-safe reset supervisor asserting RESET during battery voltage decay below 2.925V or emergency stop button activation. Use Value: Guarantees immediate motor shutdown and system halt with no software dependency-critical for IEC 62304 Class C compliance. |
Use Scenario: Managing power sequencing and recovery in ADSL2+ line card with multiple voltage rails. IC Role / Device Role / Timing Role: Primary reset source for baseband processor, triggered by 3.3V supply fault or field technician reset command. Use Value: Open-drain output enables shared reset bus with other supervisors; 100ns glitch rejection prevents spurious resets from line transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US29D3+T | Same 2.925V threshold and 150ms timeout, but push-pull RESET output; higher ICC (6µA @ +1.8V) | Requires no external pullup; unsuitable where wired-OR reset bus is needed | Select when driving high-capacitance loads directly or avoiding external resistor placement |
| TLV809E29DBZR | 2.93V threshold, 140ms timeout, SOT23-3 package; no MR input; 0.5µA ICC at +1.8V | Lacks manual reset functionality; smaller footprint but no user-initiated reset capability | Select when only power-supply monitoring is required and board space is critical |
Compared with MAX6467US29D3+T, MAX6315US29D3+T offers push-pull drive but forfeits reset bus sharing, while TLV809E29DBZR saves space and current but removes field-service reset capability-making MAX6467US29D3+T optimal for serviceable, multi-source reset architectures.
Availability
MAX6467US29D3+T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, medical infusion pumps, and DSL modems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6467US29D3+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 family was designed specifically for robust, low-power microprocessor supervision in harsh environments-delivering precision voltage monitoring, glitch-immune manual reset, and AEC-Q100-compliant operation without external components.
FAQ
What is the exact reset threshold voltage of MAX6467US29D3+T and how does it vary with temperature?
The MAX6467US29D3+T has a factory-trimmed nominal reset threshold of 2.925V, with min/typ/max values of 2.852V/2.925V/2.998V at +25°C. Over the full -40°C to +125°C range, threshold variation is ±3% (±2.5% from -40°C to +85°C), confirmed by normalized threshold vs. temperature plots in the datasheet. This ensures reliable monitoring of +3.0V supplies even under thermal stress.
Does MAX6467US29D3+T require an external pullup resistor on the RESET pin?
Yes, MAX6467US29D3+T features an active-low open-drain RESET output and requires an external pullup resistor (typically 10kΩ–100kΩ) to a valid logic rail. This enables wired-OR reset bus configurations and level translation. The pullup value must be selected to ensure VOL ≤ 0.3V when sinking 80µA, as specified in the electrical characteristics table for MAX6467US29D3+T.
Can MAX6467US29D3+T operate reliably during cold-crank automotive conditions?
Yes, MAX6467US29D3+T is AEC-Q100 qualified and specified from -40°C to +125°C. Its RESET output remains valid down to VCC = +1V, and it maintains accurate 2.925V threshold detection even during rapid VCC transients typical of cold-crank (e.g., 12V battery dropping to 3.5V). The 100ns MR glitch rejection further ensures immunity to ignition noise.
What is the maximum allowable VCC transient duration that will not trigger a false reset on MAX6467US29D3+T?
According to the "Maximum Transient Duration vs. Reset Threshold Overdrive" graph in the MAX6467US29D3+T datasheet, a 100mV overdrive (i.e., VCC falling 100mV below 2.925V) can last up to ~400µs without asserting RESET. At 200mV overdrive, the limit drops to ~150µs. This built-in immunity eliminates need for additional filtering in noisy automotive or industrial settings.
How does the manual reset (MR) function behave when the pushbutton is held low longer than the timeout period?
MAX6467US29D3+T uses edge-triggered, one-shot MR logic: only the first falling edge initiates a 150ms–300ms RESET pulse. Holding MR low beyond that period has no effect-RESET returns high after timeout regardless of MR state. After MR rises, a 150ms debounce window (tDEB) prevents retriggering, ensuring one pulse per button press even with mechanical bounce.
MAX6467US29D3+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:
- 2.925V
- Output:
- Open Drain or Open Collector
- 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
MAX6467US29D3+T FAQ
1.How can I place an order for MAX6467US29D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6467US29D3+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 MAX6467US29D3+T reliable?
The price and inventory of MAX6467US29D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6467US29D3+T is usually 5 days.
3.What payment methods are accepted for MAX6467US29D3+T?
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4.How is shipping managed for MAX6467US29D3+T?
MAX6467US29D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6467US29D3+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 MAX6467US29D3+T?
For technical support, including MAX6467US29D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6467US29D3+T requirements.
6.How does Aetrix verify that MAX6467US29D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6467US29D3+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 MAX6467US29D3+T meets industry standards.
7.What is the process for return or replacement of MAX6467US29D3+T?
All MAX6467US29D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6467US29D3+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 MAX6467US29D3+T part is unused and in its original packaging.
Return procedure for MAX6467US29D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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