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Analog Devices Inc./Maxim Integrated MAX6322HPUK29A+
- Part No.:
- MAX6322HPUK29A+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6322HPUK29A+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,978
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Product details
Overview
MAX6322HPUK29A+ from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-high push/pull reset output, 2.93V factory-trimmed reset threshold, 140ms minimum reset timeout, and 6.3ms typical watchdog timeout. It monitors VCC supply integrity, provides manual reset input (MR), and asserts reset during power-up, brownout, or software lockup in embedded control systems.
For engineers reviewing the MAX6322HPUK29A+ datasheet, MAX6322HPUK29A+ pinout, MAX6322HPUK29A+ application, or MAX6322HPUK29A+ equivalent, key selection criteria include reset polarity compatibility, VCC operating range (1.0V–5.5V), guaranteed reset validity down to VCC = 1V, AEC-Q100 qualification for automotive use, and open-drain vs. push/pull output architecture.
Technical Context
The MAX6322HPUK29A+ implements a precision voltage monitor with ±2.5% reset threshold tolerance over –40°C to +125°C, integrated watchdog timer cleared by WDI edge transitions, and MR input with 1.5µs minimum pulse width and 100ns glitch rejection. Its active-high push/pull RESET output sources/sinks current without external components.
It features guaranteed operation at VCC ≥ 1.0V, immunity to short negative VCC transients (<4µs at 100mV under VRST), and internal 52kΩ MR pullup resistor. The device belongs to the MAX6316–MAX6322 family, where suffix 'HP' denotes active-high push/pull output and '29' specifies 2.93V reset threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±2.5% over –40°C to +125°C - ensures reliable detection of 3.3V rail brownout before system instability |
| Reset Timeout Period | 140ms min - holds processor in reset long enough for stable power rail recovery and clock stabilization |
| Watchdog Timeout | 6.3ms typ - enables fast detection of firmware hangs in real-time embedded applications |
| Supply Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and compatibility with 1.8V/2.5V/3.3V/5V systems |
| Supply Current | 3µA typ at 3.6V - enables battery-powered operation for >10 years in low-duty-cycle monitoring |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial environments |
| AEC-Q100 Grade | Grade 1 - certified for automotive applications requiring high reliability across temperature extremes |
Pinout & Package
MAX6322HPUK29A+ is housed in a 5-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead(Pb)-free. Pin 1 is RESET (active-high push/pull), Pin 2 is GND, Pin 3 is MR (manual reset input), Pin 4 is WDI (watchdog input), and Pin 5 is VCC (supply input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-high push/pull reset output | Drives logic-high reset signal directly to µP reset input; no external pullup required; sinks 3.2mA at 4.5V |
| 2 - GND | Ground reference | Primary return path for all internal circuits; must be connected to system ground plane for noise immunity |
| 3 - MR | Active-low manual reset input | Pulled up internally to VCC via 52kΩ; asserts reset when driven low; rejects <100ns glitches |
| 4 - WDI | Watchdog input | Edge-sensitive; clears watchdog timer on rising/falling transition; disabled if left floating |
| 5 - VCC | Power supply input | Monitored rail input; reset asserted when VCC falls below 2.93V; operates down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.93V reset threshold | Eliminates external resistor divider; achieves ±2.5% accuracy over full temperature range without calibration |
| 140ms reset timeout | Ensures µP remains held in reset until power rails and clocks stabilize after cold start or brownout recovery |
| 6.3ms watchdog timeout | Enables rapid fault detection in safety-critical loops where >100Hz supervision is required |
| AEC-Q100 Grade 1 qualification | Validated for automotive under-hood deployment with guaranteed performance from –40°C to +125°C |
| Guaranteed reset validity to VCC = 1V | Prevents spurious release of reset during deep undervoltage conditions common in battery-backed systems |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply in engine management system exposed to load dump and cold crank conditions. IC Role / Device Role / Timing Role: Supervisory IC asserting active-high reset to ARM Cortex-M7 during VCC dip below 2.93V or software hang detected via WDI. Use Value: Prevents corrupted flash writes or unsafe actuator commands during transient faults; AEC-Q100 Grade 1 ensures reliability over 15-year vehicle lifetime. | Use Scenario: Ensures deterministic restart of field-programmable gate array (FPGA) in programmable logic controller after brownout on 2.5V auxiliary rail. IC Role / Device Role / Timing Role: Voltage supervisor generating 140ms active-high reset pulse synchronized to FPGA configuration sequence. Use Value: Eliminates need for discrete RC reset circuit; guarantees reset assertion duration exceeds FPGA's minimum TPROG requirement. |
| Battery-Powered Medical Sensor Node | Railway Signaling Controller |
Use Scenario: Powers ultra-low-power BLE microcontroller in implantable sensor with coin-cell battery and intermittent wake-up cycles. IC Role / Device Role / Timing Role: Low-quiescent-current (3µA) supervisor enabling >10-year battery life while providing MR-triggered reset for firmware updates. Use Value: Reduces BOM count by removing external reset IC and pullup resistors; 1.0V operation extends usable battery voltage range. | Use Scenario: Secures fail-safe restart of safety-critical microcontroller in wayside signaling unit subjected to EMI and rail voltage fluctuations. IC Role / Device Role / Timing Role: Dual-fault detector using both VCC monitoring and WDI supervision to meet SIL-2 functional safety requirements. Use Value: 6.3ms watchdog timeout enables detection of stuck states within 10ms-meeting EN 5012x response time mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6322HPUK29D+ | Same 2.93V threshold and active-high output, but 1.12s reset timeout instead of 140ms | Suitable for systems requiring longer reset hold time during slow-ramping supplies or complex boot sequences | Select when extended reset assertion is needed beyond 140ms; not drop-in compatible due to timeout mismatch |
| TLV803SDBZR | 2.93V reset threshold, active-high open-drain output, no watchdog or MR input, 350ms timeout | Lacks WDI and MR functionality; requires external pullup; lower quiescent current (0.5µA) but no supervision features | Choose only for basic reset-only applications where watchdog and manual reset are unnecessary |
Compared with MAX6322HPUK29A+, MAX6322HPUK29D+ offers longer reset hold time for marginal power supplies, while TLV803SDBZR reduces cost and current draw but sacrifices dual-fault detection capability and design flexibility.
Availability
MAX6322HPUK29A+ is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, battery-powered medical sensors, and railway signaling controllers requiring stable component supply with AEC-Q100 qualification and long-term lifecycle support.
Supply support for MAX6322HPUK29A+ 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 automotive, industrial, communications, and computing markets.
The MAX6316–MAX6322 product line delivers highly integrated, factory-trimmed supervisory circuits targeting space-constrained, high-reliability embedded systems requiring robust power monitoring and fault recovery.
FAQ
What is the reset output type and polarity of MAX6322HPUK29A+?
The MAX6322HPUK29A+ features an active-high push/pull reset output. This means the RESET pin drives logic-high during normal operation and asserts reset by pulling low. It sources and sinks current without requiring external pullup resistors, distinguishing it from open-drain variants like MAX6322HP. The 'H' in the part number explicitly denotes active-high output.
Does MAX6322HPUK29A+ include a watchdog timer and manual reset input?
Yes, MAX6322HPUK29A+ includes both a watchdog timer and manual reset (MR) input. The watchdog timeout is factory-set to 6.3ms (suffix 'W'), and the MR input is active-low with internal 52kΩ pullup. Driving MR low forces a reset for the full 140ms timeout period, making it suitable for user-initiated resets or system-level fault recovery.
What is the operating voltage range and minimum supply voltage for reliable reset assertion in MAX6322HPUK29A+?
MAX6322HPUK29A+ operates from 1.0V to 5.5V. Crucially, its reset function remains guaranteed down to VCC = 1.0V - meaning the device will correctly assert reset even as the supply collapses, preventing premature release of reset during brownout. This behavior is specified in the Electrical Characteristics table under "Guaranteed Reset Valid to VCC = 1V".
Is MAX6322HPUK29A+ qualified for automotive applications?
Yes, MAX6322HPUK29A+ is AEC-Q100 Grade 1 qualified, rated for operation from –40°C to +125°C. The '+' suffix indicates lead(Pb)-free packaging, and the part meets automotive reliability and stress testing requirements. It is suitable for under-hood and cabin applications including engine control, body electronics, and ADAS subsystems.
How does the reset threshold tolerance of MAX6322HPUK29A+ vary with temperature?
MAX6322HPUK29A+ has a reset threshold tolerance of ±2.5% over the full operating temperature range (–40°C to +125°C), with a nominal 2.93V threshold at +25°C. The datasheet specifies VRST = VTH ±2.5% across temperature, and the reset threshold temperature coefficient is 40ppm/°C - contributing minimally to overall drift compared to the ±2.5% band.
MAX6322HPUK29A+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6322HPUK29A+ FAQ
1.How can I place an order for MAX6322HPUK29A+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6322HPUK29A+ 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 MAX6322HPUK29A+ reliable?
The price and inventory of MAX6322HPUK29A+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6322HPUK29A+ is usually 5 days.
3.What payment methods are accepted for MAX6322HPUK29A+?
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4.How is shipping managed for MAX6322HPUK29A+?
MAX6322HPUK29A+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6322HPUK29A+ 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 MAX6322HPUK29A+?
For technical support, including MAX6322HPUK29A+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6322HPUK29A+ requirements.
6.How does Aetrix verify that MAX6322HPUK29A+ is sourced from the original manufacturer or authorized distributors?
All MAX6322HPUK29A+ 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 MAX6322HPUK29A+ meets industry standards.
7.What is the process for return or replacement of MAX6322HPUK29A+?
All MAX6322HPUK29A+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6322HPUK29A+, 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 MAX6322HPUK29A+ part is unused and in its original packaging.
Return procedure for MAX6322HPUK29A+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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