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Analog Devices Inc./Maxim Integrated MAX6320PUK29CX+T
- Part No.:
- MAX6320PUK29CX+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6320PUK29CX+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,325
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Product details
Overview
MAX6320PUK29CX+T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with open-drain active-low reset output, 2.93V factory-trimmed reset threshold, 140ms minimum reset timeout, and 1.6s typical watchdog timeout. It monitors VCC supply integrity and provides manual reset input (MR), watchdog input (WDI), and robust brownout protection down to VCC = 1V - used in battery-powered embedded controllers requiring reliable power-on initialization and fault recovery.
For engineers reviewing the MAX6320PUK29CX+T datasheet, MAX6320PUK29CX+T pinout, MAX6320PUK29CX+T application, or MAX6320PUK29CX+T equivalent, key selection criteria include its open-drain RESET output compatibility with multi-supply systems, guaranteed operation at 1V VCC, immunity to sub-4µs negative VCC transients, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The MAX6320PUK29CX+T implements a precision voltage monitor with factory-laser-trimmed 2.93V reset threshold (±1.5% at +25°C, ±2.5% over –40°C to +125°C), 140ms minimum reset timeout (C-suffix), and 1.6s typical watchdog timeout (Y-suffix). Its open-drain RESET output sinks up to 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V and leakage < 1.0µA, enabling flexible pullup to any supply ≤ 6V.
It integrates manual reset (MR) with internal 52kΩ pullup and 100ns glitch rejection, watchdog input (WDI) that clears on rising/falling edges (50ns pulse width min), and operates across –40°C to +125°C with supply current of 5–12µA at VCC = 3.6V. The device is AEC-Q100 qualified and housed in RoHS-compliant SOT23-5 package (U5+2A).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V nominal (±1.5% at +25°C); ensures reliable detection of brownout below 2.93V on monitored VCC rail |
| Reset Timeout Period | 140ms minimum (C-suffix); guarantees processor remains held in reset long enough for stable power-up sequencing |
| Watchdog Timeout | 1.6s typical (Y-suffix); provides sufficient margin to detect software hangs without false triggering during normal execution |
| RESET Output Type | Active-low open-drain; allows shared reset bus with mixed-voltage devices and pullup to independent supply up to 6V |
| Supply Current | 5µA typical at VCC = 3.6V, TA = +25°C; enables ultra-low-power operation in battery-backed systems |
| Operating Temperature | –40°C to +125°C; supports deployment in under-hood automotive and industrial environments |
| VCC Range | 1.0V to 5.5V; guarantees valid reset assertion even during deep brownout conditions |
Pinout & Package
MAX6320PUK29CX+T is packaged in a RoHS-compliant 5-pin SOT23-5 (package code U5+2A, outline 21-0057), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain output; must be pulled up externally (e.g., 10kΩ) to any supply ≤ 6V; sinks up to 3.2mA |
| 2 | GND | Ground reference for all internal circuitry and reset timing; requires low-impedance connection to system ground plane |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 52kΩ; 100ns glitch rejection; asserts reset when pulled low |
| 4 | WDI | Watchdog input; reset triggered if no edge occurs within 1.6s; accepts 50ns pulses; disable by leaving unconnected |
| 5 | VCC | Supply input (1.0V–5.5V); reset asserted when VCC falls below 2.93V; monitored rail must be decoupled with 0.1µF capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Open-drain RESET output | Enables level-shifting and multi-supply reset bus sharing without logic-level translation or contention |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset assertion during deep brownout, critical for fail-safe shutdown in automotive ECUs |
| Immunity to short negative VCC transients | Rejects transients < 4µs duration and < 100mV amplitude below VRST - eliminates spurious resets from EMI or switching noise |
| No external components required | Integrates precision voltage reference, watchdog timer, MR pullup, and reset generator - reduces BOM count and PCB area |
| AEC-Q100 qualified | Validated for automotive applications including engine control, body electronics, and ADAS subsystems |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Monitors 3.3V or 5V MCU supply in under-hood ECU exposed to wide temperature swings and load-dump transients. IC Role / Device Role / Timing Role: Provides brownout detection, manual reset for diagnostics, and watchdog supervision of firmware execution. Use Value: Prevents erratic MCU behavior during cold cranking (VCC dip to ~2.8V) and ensures safe restart after software lockup - meeting ISO 26262 ASIL-B requirements. |
Use Scenario: Supervises ARM Cortex-M7-based controller in modular PLC backplane with multiple isolated power domains. IC Role / Device Role / Timing Role: Generates synchronized reset pulse across modules using open-drain RESET tied to shared bus with 3.3V pullup. Use Value: Enables single-point reset coordination without voltage translation; 140ms timeout accommodates slow-ramping auxiliary rails. |
| Portable Medical Infusion Pump | Battery-Powered Smart Sensor Node |
Use Scenario: Ensures safe startup and fault recovery in Class II medical device powered by Li-ion battery (2.8V–4.2V range). IC Role / Device Role / Timing Role: Detects battery undervoltage (<2.93V), triggers controlled shutdown, and prevents unsafe motor actuation. Use Value: 5µA quiescent current extends battery life; AEC-Q100 qualification validates reliability for safety-critical use. |
Use Scenario: Manages reset sequencing for LoRaWAN node with dual-rail power (3.3V MCU + 1.8V sensor interface). IC Role / Device Role / Timing Role: Uses open-drain RESET to coordinate reset of both rails via separate pullups; WDI monitors sleep/wake firmware loop. Use Value: Eliminates need for discrete level shifters; 1.6s watchdog timeout matches typical sensor sampling interval. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6320PUK29CY-T | Same electrical specs and pinout, but leaded (Pb-containing) SOT23-5 package; RoHS non-compliant | Not suitable for new designs targeting RoHS/REACH compliance or export to EU/China markets | Select MAX6320PUK29CX+T for lead-free manufacturing and automotive qualification; CY-T only for legacy repair or non-regulated regions |
| TPS3808G18DBVR | 2.93V threshold, 200ms reset timeout, push-pull active-low RESET, 1.6µA IQ at 3.3V - no WDI or MR inputs | Lacks watchdog and manual reset functionality; suited for simple power-monitoring-only applications | Choose TPS3808G18DBVR only if watchdog and MR features are unnecessary and ultra-low IQ (<2µA) is prioritized over supervision capability |
Compared with MAX6320PUK29CY-T, the +T suffix confirms lead-free compliance and AEC-Q100 qualification, while TPS3808G18DBVR trades integrated supervision (WDI/MR) for lower quiescent current and simpler reset architecture - making MAX6320PUK29CX+T the sole choice when full-feature μP supervision in automotive/industrial environments is required.
Availability
MAX6320PUK29CX+T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLCs, portable medical devices, and battery-powered sensor nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MAX6320PUK29CX+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.
The MAX6316–MAX6322 family was designed to deliver highly configurable, AEC-Q100-qualified supervisory circuits with factory-trimmed thresholds, multiple reset/watchdog timeouts, and output types optimized for microprocessor reset integrity in harsh environments.
FAQ
What is the exact reset threshold voltage of MAX6320PUK29CX+T?
The MAX6320PUK29CX+T has a factory-trimmed nominal reset threshold of 2.93V, with tolerance of ±1.5% at +25°C and ±2.5% over the full operating temperature range (–40°C to +125°C). This value is laser-trimmed during production and documented in Table 1 of the MAX6316–MAX6322 datasheet. The "29" in the part number directly encodes the 2.93V threshold.
Does MAX6320PUK29CX+T support watchdog functionality, and what is its timeout period?
Yes, MAX6320PUK29CX+T includes a watchdog timer with a typical timeout period of 1.6 seconds (Y-suffix). The watchdog is cleared on any rising or falling edge at the WDI pin and asserts reset if no transition occurs within this period. It remains disabled only if WDI is left unconnected or three-stated - no external configuration is needed to enable it.
What type of reset output does MAX6320PUK29CX+T provide, and how must it be interfaced?
MAX6320PUK29CX+T provides an active-low open-drain RESET output (Pin 1). It must be pulled up externally - typically with a 10kΩ resistor - to a supply voltage between 1.0V and 6.0V. This architecture allows interoperability with mixed-voltage systems and avoids contention when multiple devices drive the same reset bus.
Is MAX6320PUK29CX+T qualified for automotive applications?
Yes, MAX6320PUK29CX+T is AEC-Q100 qualified (Grade 1: –40°C to +125°C), with full characterization across temperature, voltage, and lifetime stress tests. Its design includes immunity to short negative VCC transients and guaranteed operation down to VCC = 1V - meeting critical requirements for automotive engine control, body electronics, and ADAS subsystems.
What is the function of the MR pin on MAX6320PUK29CX+T, and how should it be handled if unused?
The MR (Manual Reset) pin on MAX6320PUK29CX+T is an active-low input that forces reset when pulled low. If unused, it may be left floating because an internal 52kΩ pullup resistor connects it to VCC. No external components are required. For noise immunity, a 0.1µF capacitor from MR to GND is recommended in electrically noisy environments.
MAX6320PUK29CX+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 or Open Collector
- Reset:
- 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
MAX6320PUK29CX+T FAQ
1.How can I place an order for MAX6320PUK29CX+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6320PUK29CX+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 MAX6320PUK29CX+T reliable?
The price and inventory of MAX6320PUK29CX+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6320PUK29CX+T is usually 5 days.
3.What payment methods are accepted for MAX6320PUK29CX+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6320PUK29CX+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6320PUK29CX+T?
MAX6320PUK29CX+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6320PUK29CX+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 MAX6320PUK29CX+T?
For technical support, including MAX6320PUK29CX+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6320PUK29CX+T requirements.
6.How does Aetrix verify that MAX6320PUK29CX+T is sourced from the original manufacturer or authorized distributors?
All MAX6320PUK29CX+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 MAX6320PUK29CX+T meets industry standards.
7.What is the process for return or replacement of MAX6320PUK29CX+T?
All MAX6320PUK29CX+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6320PUK29CX+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 MAX6320PUK29CX+T part is unused and in its original packaging.
Return procedure for MAX6320PUK29CX+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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