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Analog Devices Inc./Maxim Integrated MAX6322HPUK46C-T
- Part No.:
- MAX6322HPUK46C-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6322HPUK46C-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,453
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Product details
Overview
MAX6322HPUK46C-T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low open-drain reset output, 4.63V factory-trimmed reset threshold, 140ms minimum reset timeout, and no watchdog function. It monitors VCC supply integrity and provides manual reset capability for embedded control systems requiring robust brownout protection.
For engineers reviewing the MAX6322HPUK46C-T datasheet, MAX6322HPUK46C-T pinout, MAX6322HPUK46C-T application, or MAX6322HPUK46C-T equivalent, this page delivers verified electrical parameters, SOT23-5 terminal mapping, real-world use cases in battery-powered instrumentation, and two validated alternative parts with documented functional differences.
Technical Context
The MAX6322HPUK46C-T implements a precision voltage monitor with ±2.5% reset threshold tolerance over –40°C to +125°C, guaranteed reset assertion down to VCC = 1V, and 100ns MR input glitch rejection. Its open-drain RESET output sinks up to 3.2mA at VCC ≥ 4.5V and supports pullup to any supply ≤ 6V.
It features an internal 52kΩ MR pullup resistor, accepts TTL/CMOS logic levels on MR, and asserts reset on VCC drop below 4.63V, MR low assertion, or (in watchdog-enabled variants) WDI timeout - though MAX6322HPUK46C-T excludes watchdog functionality per Selector Guide and Table 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal, ±2.5% over –40°C to +125°C - ensures reliable detection of 5V rail brownout before system instability |
| Reset Timeout | 140ms minimum - holds processor in reset long enough for power stabilization after VCC recovery |
| RESET Output Type | Active-low open-drain - enables level-shifting, wired-OR reset buses, and compatibility with multiple supply domains |
| Supply Current | 3–12µA at VCC = 3.6V–5.5V - enables use in always-on battery-powered applications without significant drain |
| Operating Temp | –40°C to +125°C - qualified for industrial and automotive under-hood environments |
| MR Input Logic | TTL/CMOS compatible with internal 52kΩ pullup - eliminates external components for momentary switch interface |
| VCC Range | 1.0V to 5.5V - guarantees valid reset operation even during deep brownout conditions |
Pinout & Package
MAX6322HPUK46C-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, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain output - requires external pullup; sinks 3.2mA at VCC ≥ 4.5V; tolerates up to 6V on pullup rail |
| 2 | GND | Ground reference - must be connected directly to system ground plane for noise immunity and accurate threshold sensing |
| 3 | MR | Active-low manual reset input - internally pulled up to VCC via 52kΩ; accepts 0.3×VCC/0.7×VCC logic thresholds |
| 4 | NC | No connect - pin 4 is unconnected and must remain floating; not bonded internally |
| 5 | VCC | Supply input - monitors this rail for reset generation; absolute max rating is +6V; operates down to 1.0V |
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 configuration |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during severe brownout, preventing partial execution or latch-up in downstream logic |
| Immunity to short negative VCC transients | Rejects <4µs, 100mV-under-threshold glitches - avoids spurious resets from switching noise or ESD coupling |
| AEC-Q100 qualified | Validated for automotive applications including engine control modules and body electronics requiring Grade 2 temperature range |
| Open-drain RESET with 6V tolerance | Enables reset bus sharing across mixed-voltage subsystems (e.g., 3.3V MCU + 5V peripheral) using single pullup |
Applications
| Portable/Battery-Powered Equipment | Embedded Control Systems |
|---|---|
Use Scenario: Long-life sensor node powered by coin cell or Li-ion battery with intermittent wake/sleep cycles. IC Role / Device Role / Timing Role: Voltage supervisor ensuring MCU remains held in reset until stable VCC is established after cold start or wake-up. Use Value: Prevents erratic boot sequences and flash corruption during marginal supply conditions, extending field reliability. |
Use Scenario: Industrial PLC module with distributed I/O requiring synchronized reset across multiple ASICs. IC Role / Device Role / Timing Role: Centralized reset generator with open-drain output enabling wired-OR reset bus topology. Use Value: Eliminates need for discrete logic or buffer ICs while supporting multi-rail coordination and fault isolation. |
| Intelligent Instruments | Controllers |
Use Scenario: Handheld multimeter with auto-ranging analog front-end and precision ADC. IC Role / Device Role / Timing Role: Brownout detector asserting reset when main 3.3V rail dips below 4.63V due to battery sag under load. Use Value: Maintains measurement integrity by blocking ADC conversions and display updates during unstable supply. |
Use Scenario: HVAC controller with microcontroller, relay drivers, and communication interfaces (RS-485, CAN). IC Role / Device Role / Timing Role: System-level reset arbiter that coordinates startup sequencing between MCU and peripheral drivers. Use Value: Ensures relay coils are de-energized and communication PHYs are initialized before firmware begins polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6320PUK46CY-T | Identical 4.63V reset threshold, 140ms timeout, open-drain RESET, but includes watchdog timer (1.6s typical) | Required where software hang detection is needed; adds WDI pin and associated firmware overhead | Select MAX6320PUK46CY-T only if watchdog monitoring is mandatory; otherwise MAX6322HPUK46C-T reduces BOM count and simplifies layout |
| TPS3808G33DBVR | 3.3V fixed reset threshold, 200ms timeout, push-pull active-low RESET, no MR input, 1.8–6.5V VCC range | Designed for 3.3V-only systems; lacks manual reset and open-drain flexibility; higher quiescent current (12µA typ) | Choose TPS3808G33DBVR only for cost-sensitive 3.3V designs without MR requirement; MAX6322HPUK46C-T offers broader voltage support and design flexibility |
Compared with MAX6320PUK46CY-T, MAX6322HPUK46C-T removes watchdog complexity for simpler firmware and lower risk of false triggers; compared with TPS3808G33DBVR, it provides precise 4.63V threshold matching 5V rails and essential manual reset capability for field service.
Availability
MAX6322HPUK46C-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded control systems, intelligent instruments, and industrial controllers requiring stable component supply with automotive-grade temperature performance.
Supply support for MAX6322HPUK46C-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 industrial, automotive, and communications markets, emphasizing high reliability and extended temperature operation.
The MAX6316–MAX6322 family targets microprocessor supervision in harsh environments, delivering factory-trimmed voltage thresholds, integrated manual reset, and multiple reset output configurations for flexible system integration.
FAQ
What is the reset threshold voltage of MAX6322HPUK46C-T and how tightly is it specified?
The MAX6322HPUK46C-T has a factory-trimmed nominal reset threshold of 4.63V, with ±1.5% tolerance at +25°C and ±2.5% over the full –40°C to +125°C operating range. This specification ensures consistent brownout detection across temperature extremes without requiring external calibration or trimming components.
Does MAX6322HPUK46C-T include a watchdog timer function?
No, MAX6322HPUK46C-T does not include a watchdog timer. Per the Selector Guide and Table 2, MAX6322HP variants lack WDI functionality. The device provides only power-supply monitoring and manual reset - making it suitable for applications where software hang detection is handled externally or not required.
What is the function of Pin 4 on MAX6322HPUK46C-T?
Pin 4 on MAX6322HPUK46C-T is a no-connect (NC) terminal. It is not bonded internally and must remain unconnected on the PCB. Routing traces or placing vias to this pin may cause mechanical stress or unintended coupling; best practice is to leave it floating and exclude from copper pours.
Can MAX6322HPUK46C-T drive a reset line shared with other devices?
Yes, MAX6322HPUK46C-T's open-drain RESET output is explicitly designed for wired-OR bus configurations. When used with a common pullup resistor, it safely shares the reset line with other open-drain or open-collector reset sources without contention, enabling coordinated system-level reset in multi-IC designs.
What is the maximum allowable voltage on the RESET pin of MAX6322HPUK46C-T?
The RESET pin of MAX6322HPUK46C-T is rated for voltages up to +6V regardless of VCC level, as stated in the Absolute Maximum Ratings table. This allows the pin to be pulled up to higher-voltage rails (e.g., 5V) while monitoring a lower VCC (e.g., 3.3V), supporting mixed-voltage system architectures.
MAX6322HPUK46C-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:
- 4.63V
- 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
MAX6322HPUK46C-T FAQ
1.How can I place an order for MAX6322HPUK46C-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6322HPUK46C-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 MAX6322HPUK46C-T reliable?
The price and inventory of MAX6322HPUK46C-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6322HPUK46C-T is usually 5 days.
3.What payment methods are accepted for MAX6322HPUK46C-T?
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4.How is shipping managed for MAX6322HPUK46C-T?
MAX6322HPUK46C-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6322HPUK46C-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 MAX6322HPUK46C-T?
For technical support, including MAX6322HPUK46C-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6322HPUK46C-T requirements.
6.How does Aetrix verify that MAX6322HPUK46C-T is sourced from the original manufacturer or authorized distributors?
All MAX6322HPUK46C-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 MAX6322HPUK46C-T meets industry standards.
7.What is the process for return or replacement of MAX6322HPUK46C-T?
All MAX6322HPUK46C-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6322HPUK46C-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 MAX6322HPUK46C-T part is unused and in its original packaging.
Return procedure for MAX6322HPUK46C-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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