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Analog Devices Inc./Maxim Integrated MAX6322HPUK29C-T
- Part No.:
- MAX6322HPUK29C-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6322HPUK29C-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,155
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Product details
Overview
MAX6322HPUK29C-T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low open-drain reset output, manual reset input, and no watchdog function. It features a factory-trimmed 2.93V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum reset timeout, guaranteed reset validity down to VCC = 1V, and AEC-Q100 qualification. It is used in battery-powered embedded controllers to ensure reliable power-on initialization and brownout recovery.
For engineers reviewing the MAX6322HPUK29C-T datasheet, MAX6322HPUK29C-T pinout, MAX6322HPUK29C-T application, or MAX6322HPUK29C-T equivalent, key selection criteria include its 2.93V reset threshold tolerance, 140ms reset timeout, open-drain output compatibility with mixed-voltage systems, and absence of watchdog functionality - critical for deterministic reset-only supervision in safety-critical industrial and automotive subsystems.
Technical Context
The MAX6322HPUK29C-T implements a precision voltage-monitoring comparator with 40ppm/°C temperature coefficient and hysteresis of ≥3mV, ensuring stable reset assertion during supply transients. Its internal 52kΩ MR pullup resistor enables direct connection of a momentary switch to ground without external components.
This variant belongs to the MAX6322HP series, which provides active-low open-drain RESET output compatible with pullup voltages up to 6V, supports manual reset only (no WDI pin), and guarantees valid logic levels across full operating temperature (-40°C to +125°C) and supply range (1.0V to 5.5V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±2.5% over -40°C to +125°C - ensures accurate brownout detection at nominal 3.0V system rails |
| Reset Timeout Period | 140ms (min) - holds reset long enough for microcontroller PLL lock and memory initialization |
| Supply Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and compatibility with 1.8V–5V logic domains |
| RESET Output Type | Active-low open-drain - allows level-shifting via external pullup to any voltage ≤6V, enabling multi-rail system reset coordination |
| MR Input Threshold | VIL = 0.3×VCC, VIH = 0.7×VCC - compatible with CMOS/TTL logic drivers across all supply voltages |
| Quiescent Current | 3µA (typ) at VCC = 3.6V - enables years of operation on coin-cell batteries in portable instrumentation |
| AEC-Q100 Grade | Qualified to Grade 2 (-40°C to +105°C ambient) - validated for under-hood automotive modules and industrial control units |
Pinout & Package
MAX6322HPUK29C-T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads optimized for automated reflow assembly and thermal performance (θJA = 255.9°C/W on multilayer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain output - requires external pullup; sinks ≥1.2mA at VCC ≥2.7V for robust noise immunity |
| 2 | GND | Ground reference - must be connected directly to system ground plane to maintain reset threshold accuracy |
| 3 | MR | Manual reset input - internally pulled up to VCC via 52kΩ; driven low to force reset for duration of tRP (140ms) |
| 4 | NC | No connect - pin 4 is unconnected internally and must remain floating or grounded per layout best practices |
| 5 | VCC | Supply input - monitors this rail for reset assertion; operates down to 1.0V with guaranteed reset validity |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated 52kΩ MR pullup and factory-trimmed voltage divider eliminate need for resistors or capacitors in basic supervision |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during severe brownout - critical for fail-safe shutdown in automotive ECUs |
| Immunity to short negative VCC transients | Rejects <4µs, 100mV-under-threshold glitches - prevents spurious resets from EMI or switching noise |
| Open-drain RESET with 6V tolerance | Enables single reset bus coordination across 1.8V, 3.3V, and 5V domains using one pullup voltage |
| AEC-Q100 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor modules |
Applications
| Industrial PLC I/O Module | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Supervises 3.3V microcontroller and CAN transceiver power rails in a distributed I/O node exposed to 12V battery fluctuations. IC Role / Device Role / Timing Role: Monitors VCC and asserts open-drain RESET to hold MCU in reset until stable 3.3V is established post-brownout. Use Value: Prevents firmware corruption during cold-crank events by guaranteeing 140ms reset hold time and operation down to 1.0V VCC. |
Use Scenario: Provides power-on reset for an ARM Cortex-M7-based BCM managing door locks, lighting, and window controls. IC Role / Device Role / Timing Role: Generates system-wide reset signal tied to multiple ICs via shared open-drain bus pulled to 5V. Use Value: AEC-Q100 qualification and 2.93V threshold match 3.0V rail tolerances, eliminating need for external voltage dividers. |
| Portable Medical Infusion Pump | Smart Energy Meter MCU Subsystem |
|
Use Scenario: Ensures safe startup of a low-power MCU and motor driver in a battery-operated infusion pump with strict safety certification requirements. IC Role / Device Role / Timing Role: Detects Li-ion battery voltage sag below 2.93V and forces controlled shutdown via open-drain reset assertion. Use Value: 3µA typical supply current extends battery life; guaranteed reset down to 1.0V prevents unsafe operation during end-of-life discharge. |
Use Scenario: Supervises metrology SoC and RTC in a DIN-rail energy meter subjected to wide ambient temperature swings and grid transients. IC Role / Device Role / Timing Role: Provides precise 2.93V reset threshold and 140ms timeout aligned with EN 50470-3 power-fail response timing. Use Value: ±2.5% threshold tolerance over -40°C to +125°C eliminates calibration drift; SOT23 footprint saves space on constrained meter PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6322HPUK29D-T | Same 2.93V threshold and open-drain output, but 1.12s reset timeout (vs. 140ms) | Suitable for systems requiring longer reset hold time for complex FPGA configuration or EEPROM write cycles | Select when extended reset duration is needed; not drop-in due to timeout mismatch |
| TPS3808G12QDBVRQ1 | 2.93V threshold, push/pull active-low RESET, 200ms timeout, automotive-grade (AEC-Q100) | Lacks open-drain flexibility; requires dedicated 3.3V pullup; higher quiescent current (12µA vs. 3µA) | Choose if push/pull drive strength is preferred and multi-rail reset coordination is unnecessary |
Compared with MAX6322HPUK29C-T, the MAX6322HPUK29D-T offers longer reset hold time at identical threshold and output type, while the TPS3808G12QDBVRQ1 trades open-drain versatility for higher drive capability and simplified layout - both require design validation for timing and voltage-domain compatibility.
Availability
MAX6322HPUK29C-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and portable medical devices requiring stable component supply with automotive-grade reliability and low-power operation.
Supply support for MAX6322HPUK29C-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
Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for demanding applications in automotive, industrial, and communications markets.
The MAX6316–MAX6322 family delivers precision voltage supervision with configurable reset thresholds and timeouts, targeting cost-sensitive, space-constrained embedded systems needing guaranteed power-on and brownout protection.
FAQ
What is the reset threshold voltage of the MAX6322HPUK29C-T?
The MAX6322HPUK29C-T has a factory-trimmed nominal reset threshold of 2.93V, with tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is specified in Table 1 of the datasheet and corresponds to the "29" suffix in the part number. The MAX6322HPUK29C-T uses laser-trimmed resistors to achieve this accuracy without external components.
Does the MAX6322HPUK29C-T include a watchdog timer?
No, the MAX6322HPUK29C-T does not include a watchdog timer. Its part number suffix "HP" indicates active-high push/pull or active-low open-drain reset output with manual reset only - confirmed by the Selector Guide showing "-" under WATCHDOG INPUT for MAX6322HP variants. The MAX6322HPUK29C-T relies solely on VCC monitoring and MR input for reset assertion.
What is the function of Pin 4 on the MAX6322HPUK29C-T?
Pin 4 on the MAX6322HPUK29C-T is a no-connect (NC) terminal - it is not bonded internally and serves no electrical function. Per Maxim's pin description and SOT23 top-mark diagrams, Pin 4 must remain unconnected in the PCB layout. Connecting it may cause mechanical stress or unintended coupling; grounding is acceptable only if required by board-level EMI mitigation, but not electrically necessary.
Can the MAX6322HPUK29C-T drive a reset line shared with 5V logic?
Yes, the MAX6322HPUK29C-T's open-drain RESET output supports pullup voltages up to 6V, making it fully compatible with 5V logic families. An external pullup resistor (e.g., 10kΩ to 5V) ensures proper logic-high levels while allowing the MAX6322HPUK29C-T to sink ≥1.2mA when asserting reset. This enables interoperability across mixed-voltage systems without level translators.
Is the MAX6322HPUK29C-T qualified for automotive applications?
Yes, the MAX6322HPUK29C-T is AEC-Q100 qualified (Grade 2, -40°C to +105°C ambient), as explicitly stated in the Benefits and Features section and Absolute Maximum Ratings table. This qualification covers stress testing for temperature cycling, humidity, and ESD - validating its use in automotive body electronics, infotainment power supplies, and other non-engine-compartment modules requiring automotive reliability.
MAX6322HPUK29C-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- 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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6322HPUK29C-T FAQ
1.How can I place an order for MAX6322HPUK29C-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6322HPUK29C-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 MAX6322HPUK29C-T reliable?
The price and inventory of MAX6322HPUK29C-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6322HPUK29C-T is usually 5 days.
3.What payment methods are accepted for MAX6322HPUK29C-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6322HPUK29C-T transactions.
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4.How is shipping managed for MAX6322HPUK29C-T?
MAX6322HPUK29C-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6322HPUK29C-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 MAX6322HPUK29C-T?
For technical support, including MAX6322HPUK29C-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6322HPUK29C-T requirements.
6.How does Aetrix verify that MAX6322HPUK29C-T is sourced from the original manufacturer or authorized distributors?
All MAX6322HPUK29C-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 MAX6322HPUK29C-T meets industry standards.
7.What is the process for return or replacement of MAX6322HPUK29C-T?
All MAX6322HPUK29C-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6322HPUK29C-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 MAX6322HPUK29C-T part is unused and in its original packaging.
Return procedure for MAX6322HPUK29C-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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