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Analog Devices Inc./Maxim Integrated MAX6322HPUK29A+T
- Part No.:
- MAX6322HPUK29A+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6322HPUK29A+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,944
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Product details
Overview
MAX6322HPUK29A+T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory IC with active-low open-drain reset output, 2.93V factory-trimmed reset threshold, 140ms minimum reset timeout, and manual reset input. It monitors VCC supply integrity and provides system-level reset assertion during power-up, brownout, or software fault conditions in embedded controllers and portable instrumentation.
For engineers reviewing the MAX6322HPUK29A+T datasheet, MAX6322HPUK29A+T pinout, MAX6322HPUK29A+T application, or MAX6322HPUK29A+T equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts for industrial-grade power monitoring and watchdog-free reset supervision.
Technical Context
The MAX6322HPUK29A+T implements a precision voltage monitor with ±2.5% reset threshold tolerance over -40°C to +125°C, guaranteed reset validity down to VCC = 1V, and immunity to sub-4µs negative VCC transients. Its manual reset (MR) input features internal 52kΩ pullup, 100ns glitch rejection, and 1.5µs minimum pulse width at full temperature range.
This variant belongs to the MAX6322HP series: no watchdog timer, active-high push/pull reset output is omitted, and it uses open-drain RESET output requiring external pullup. It supports operation across 1.0V–5.5V supply range with supply current as low as 3µA at 3.6V and -40°C to +125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V nominal (factory-trimmed), ±2.5% over -40°C to +125°C - ensures reliable brownout detection at 3.3V systems |
| Reset Timeout | 140ms minimum (C-suffix) - holds reset long enough for microcontroller power stabilization and clock lock |
| Supply Voltage Range | 1.0V to 5.5V - enables use with Li-ion battery-powered devices down to end-of-discharge |
| Supply Current | 3µA typical at 3.6V, -40°C to +125°C - supports ultra-low-power always-on monitoring |
| RESET Output Type | Active-low open-drain - allows level-shifting and wired-OR reset bus with multiple supervisors or processors |
| MR Input Behavior | Active-low with internal 52kΩ pullup - eliminates external resistor; accepts TTL/CMOS logic and momentary switch inputs |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6322HPUK29A+T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057), footprint-compatible with JEDEC MO-178AB, and optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain output; requires external pullup to any voltage ≤6V; sinks ≥1.2mA at VCC ≥2.7V |
| 2 | GND | Ground reference for all internal circuitry and reset timing accuracy |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 52kΩ; asserts reset for full tRP after release |
| 4 | NC | No connect - pin 4 is unconnected and must remain floating per datasheet |
| 5 | VCC | Power supply input; monitored for reset generation; absolute max rating -0.3V to +6V |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated voltage reference, timing capacitor, and MR pullup eliminate BOM count and layout area |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during deep brownout or battery sag without external support circuitry |
| Immunity to short VCC transients | Rejects <4µs negative glitches down to 100mV below VRST - avoids spurious resets in noisy power environments |
| AEC-Q100 qualified | Validated for automotive applications including engine control modules and ADAS sensor nodes |
| Lead(Pb)-free packaging | +T suffix denotes RoHS-compliant, matte-tin lead finish with reflow profile up to +260°C |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
|
Use Scenario: Compact programmable logic controller operating from 3.3V rail with intermittent 12V auxiliary supply. IC Role / Device Role / Timing Role: Supervises main 3.3V domain; asserts open-drain RESET to ARM Cortex-M7 MCU and FPGA upon undervoltage or operator-initiated MR press. Use Value: Prevents firmware corruption during brownout by holding reset until VCC stabilizes above 2.93V for ≥140ms - matches boot ROM initialization timing. |
Use Scenario: Battery-powered ECG device with dual-supply architecture (3.3V analog front-end, 1.8V digital core). IC Role / Device Role / Timing Role: Monitors 3.3V supply only; RESET line pulled up to 3.3V and shared with microcontroller and ADC; MR tied to tactile button. Use Value: Enables user-triggered safe shutdown and restart without firmware intervention - critical for clinical data integrity and regulatory compliance. |
| Automotive Body Control Module | Smart Energy Meter |
|
Use Scenario: Under-dash BCM exposed to wide temperature swings (-40°C to +105°C) and load-dump transients. IC Role / Device Role / Timing Role: Provides primary reset supervision for Infineon AURIX TC3xx MCU; RESET pulled up to 5V rail for compatibility with legacy peripherals. Use Value: AEC-Q100 qualification and -40°C to +125°C operation ensure reliability across vehicle lifetime - no derating needed. |
Use Scenario: DIN-rail mounted meter with isolated RS-485 interface and tamper-detection circuitry. IC Role / Device Role / Timing Role: Resets metrology SoC on AC mains dropout; MR connected to optical tamper sensor output (open-collector). Use Value: Open-drain RESET allows direct OR-ing with tamper-induced reset signal - single reset net simplifies isolation and certification. |
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 SOT23 package, but 1.12s reset timeout (D-suffix vs. A-suffix) | Suitable where longer reset hold time is needed for complex FPGA configuration or multi-rail sequencing | Select when system boot sequence exceeds 140ms - no PCB changes required |
| TLV803EB29DBVR | 2.93V reset threshold, 140ms timeout, SOT23-5, but no manual reset input and higher 12µA supply current | Lacks MR functionality; limited to pure supply-monitoring use cases without user-initiated reset capability | Choose only if MR is unused and lower cost is prioritized over feature parity |
Compared with MAX6322HPUK29A+T, the D-suffix variant extends reset assertion for slower-boot systems without altering pinout or voltage specs, while TLV803EB29DBVR trades MR functionality for lower unit cost in fixed-supply-only designs.
Availability
MAX6322HPUK29A+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6322HPUK29A+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 precision analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX6316–MAX6322 family delivers highly integrated, factory-trimmed supervisory circuits targeting space-constrained, high-reliability embedded systems needing robust power monitoring without external timing components.
FAQ
What is the reset threshold voltage of MAX6322HPUK29A+T?
The MAX6322HPUK29A+T has a factory-trimmed nominal reset threshold of 2.93V, with ±2.5% tolerance over the full -40°C to +125°C operating temperature range. This value is laser-trimmed during manufacturing and specified in Table 1 of the datasheet. The actual threshold remains stable across voltage and temperature, enabling precise brownout detection in 3.3V systems where margin below nominal supply is critical.
Does MAX6322HPUK29A+T include a watchdog timer?
No, MAX6322HPUK29A+T does not include a watchdog timer. It belongs to the MAX6322HP series, which omits the WDI (watchdog input) pin and associated timing circuitry. The "HP" suffix indicates active-high push/pull reset output is also excluded - instead, MAX6322HPUK29A+T provides active-low open-drain RESET. For watchdog functionality, consider MAX6321HP variants with same threshold and timeout.
What is the function of pin 4 on MAX6322HPUK29A+T?
Pin 4 on MAX6322HPUK29A+T is a no-connect (NC) terminal. It is internally unconnected and must remain floating in the PCB layout - no trace, pad, or solder should be attached. This is confirmed in the Pin Description table (page 5) and Typical Operating Circuit diagrams (page 11) of the official datasheet. Connecting pin 4 may cause unpredictable behavior or damage.
Can MAX6322HPUK29A+T operate with a 1.8V supply?
Yes, MAX6322HPUK29A+T operates with supply voltages from 1.0V to 5.5V. At 1.8V, its reset threshold remains 2.93V - meaning it will assert RESET whenever VCC falls below 2.93V, which cannot occur at 1.8V operation. Therefore, it is only functional as a supervisor when VCC ≥2.93V. For 1.8V systems, select a variant with lower threshold (e.g., MAX6322HPUK18A+T).
What pullup resistor value is recommended for the RESET output of MAX6322HPUK29A+T?
A 10kΩ pullup resistor is recommended for the open-drain RESET output of MAX6322HPUK29A+T when pulled to the same VCC rail. This value ensures VOL ≤0.4V at ISINK = 3.2mA (for VCC ≥4.5V) while limiting current to <0.5mA during reset assertion. For level-shifting (e.g., pulling RESET to 5V while VCC = 3.3V), calculate based on sink current and logic-high threshold of the driven device - 10kΩ remains appropriate for most CMOS inputs.
MAX6322HPUK29A+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:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6322HPUK29A+T FAQ
1.How can I place an order for MAX6322HPUK29A+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6322HPUK29A+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 MAX6322HPUK29A+T reliable?
The price and inventory of MAX6322HPUK29A+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6322HPUK29A+T is usually 5 days.
3.What payment methods are accepted for MAX6322HPUK29A+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6322HPUK29A+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6322HPUK29A+T?
MAX6322HPUK29A+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6322HPUK29A+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 MAX6322HPUK29A+T?
For technical support, including MAX6322HPUK29A+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6322HPUK29A+T requirements.
6.How does Aetrix verify that MAX6322HPUK29A+T is sourced from the original manufacturer or authorized distributors?
All MAX6322HPUK29A+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 MAX6322HPUK29A+T meets industry standards.
7.What is the process for return or replacement of MAX6322HPUK29A+T?
All MAX6322HPUK29A+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6322HPUK29A+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 MAX6322HPUK29A+T part is unused and in its original packaging.
Return procedure for MAX6322HPUK29A+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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