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Analog Devices Inc./Maxim Integrated MAX6320PUK29DY+T
- Part No.:
- MAX6320PUK29DY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6320PUK29DY+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,460
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Product details
Overview
MAX6320PUK29DY+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, provides manual reset input (MR), and asserts reset during power-up, brownout, or software hang conditions - used in battery-powered embedded controllers requiring reliable power-on initialization.
For engineers reviewing the MAX6320PUK29DY+T datasheet, MAX6320PUK29DY+T pinout, MAX6320PUK29DY+T application, or MAX6320PUK29DY+T equivalent, key selection criteria include its open-drain reset architecture compatible with multi-supply systems, guaranteed reset validity down to VCC = 1V, immunity to short negative VCC transients (<4µs at 100mV under threshold), and AEC-Q100 qualification for automotive-adjacent industrial use.
Technical Context
The MAX6320PUK29DY+T implements a precision voltage monitor with laser-trimmed internal resistor divider setting VRST = 2.93V ±2.5% over -40°C to +125°C, paired with a digital reset timer generating ≥140ms active-low pulse after VCC rise. Its watchdog circuit clears on any WDI edge and times out after 1.6s (typ) if unserviced, supporting fail-safe recovery in firmware loops.
It features an open-drain RESET output requiring external pullup (to ≤6V), MR input with 52kΩ internal pullup and 100ns glitch rejection, and WDI input designed for three-state microcontroller outputs capable of sourcing/sinking ≥200µA. The device draws only 5µA at VCC = 3.6V and operates across 1.0V–5.5V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±2.5% (factory-laser-trimmed; ensures precise brownout detection at nominal 2.93V) |
| Reset Timeout Period | 140ms minimum (guaranteed deassertion delay after VCC rises above threshold) |
| Watchdog Timeout | 1.6s typical (enables robust firmware hang detection without excessive timeout latency) |
| Supply Current | 5µA at 3.6V (ultra-low quiescent current enables long battery life in portable equipment) |
| Operating Voltage Range | 1.0V to 5.5V (ensures valid reset assertion even during deep brownout down to 1V) |
| Reset Output Type | Active-low open-drain (supports level-shifting, wired-OR reset buses, and multi-voltage system interfacing) |
| Temperature Range | -40°C to +125°C (AEC-Q100 qualified; suitable for under-hood and industrial control environments) |
Pinout & Package
MAX6320PUK29DY+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. This miniature footprint supports high-density PCB layouts in space-constrained portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain active-low reset output | Sinks current only; requires external pullup resistor (e.g., 10kΩ) to any supply ≤6V; enables shared reset bus with mixed-voltage devices |
| 2 - GND | Ground reference | Primary return path for internal monitoring circuitry and reset driver; must be low-impedance connection to system ground plane |
| 3 - MR | Active-low manual reset input | Pull low to force reset; internally pulled up to VCC via 52kΩ; rejects <100ns glitches; no external debouncing needed |
| 4 - WDI | Watchdog input | Edge-triggered (rising/falling); resets watchdog timer on transition; disable by leaving unconnected or three-stating |
| 5 - VCC | Supply voltage input | Monitored power rail (1.0V–5.5V); reset asserted when VCC falls below 2.93V; absolute max = +6V |
Key Features
| Feature | Design Value |
|---|---|
| Open-drain RESET output | Enables interface with multiple supply domains (e.g., 3.3V MCU + 5V peripheral) using single pullup to appropriate rail |
| Factory-trimmed 2.93V threshold | Eliminates external resistor network; achieves ±2.5% accuracy over full temperature range without calibration |
| 140ms reset timeout | Ensures sufficient hold time for slow-ramping supplies and stable clock startup before processor release |
| 1.6s watchdog period | Balances fault detection responsiveness with tolerance for brief software stalls in real-time control loops |
| AEC-Q100 qualification | Validated for automotive-grade reliability (Grade 1: -40°C to +125°C), supporting industrial and transportation applications |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
|
Use Scenario: Microcontroller-based programmable logic controller operating in factory-floor environments with fluctuating 24V DC input converted to 3.3V. IC Role / Device Role / Timing Role: Supervises 3.3V rail, asserts open-drain RESET to ARM Cortex-M4 during undervoltage or firmware lockup; MR allows field-service hard reset. Use Value: Prevents spurious operation during line dips; 140ms timeout accommodates slow DC-DC startup; AEC-Q100 rating ensures longevity in thermally stressed enclosures. |
Use Scenario: Central body controller managing door locks, lighting, and window motors powered from vehicle battery (9V–16V). IC Role / Device Role / Timing Role: Monitors regulated 3.3V domain; uses WDI to detect CAN communication stack hangs; RESET pulls low via 10kΩ pullup to 5V domain for legacy IC compatibility. Use Value: Open-drain output avoids voltage conflict between 3.3V supervisor and 5V reset-tolerant peripherals; 2.93V threshold aligns with brownout detection for 3.3V LDOs. |
| Portable Medical Monitor | Smart Energy Meter |
|
Use Scenario: Battery-powered ECG monitor with ultra-low-power sleep mode and fast wake-up requirements. IC Role / Device Role / Timing Role: Provides power-on reset and watchdog supervision for MSP430F5xx MCU; MR connected to tactile button for user-initiated recalibration reset. Use Value: 5µA supply current extends battery life; 1.6s watchdog timeout prevents false triggers during sensor acquisition bursts; guaranteed reset down to VCC = 1V ensures safety-critical reset integrity. |
Use Scenario: DIN-rail mounted electricity meter with isolated RS-485 interface and tamper-detection logic. IC Role / Device Role / Timing Role: Supervises 3.3V supply feeding metrology SoC and isolation barrier; RESET tied to isolated reset input of digital isolator (e.g., Si86xx) via 10kΩ pullup. Use Value: Open-drain architecture eliminates level-shifter components; 100ns MR glitch rejection suppresses noise from relay coil switching; -40°C to +125°C range covers outdoor enclosure extremes. |
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 2.93V threshold, 140ms timeout, 1.6s watchdog; leaded (Pb) package instead of lead-free (+T suffix) | Non-automotive industrial use where RoHS exemption applies; identical electrical behavior | Select when leaded solder process is required or RoHS compliance is not mandated |
| TPS3808G33DBVR | 3.3V fixed threshold (not 2.93V); 200ms min reset timeout; no watchdog; push-pull active-low RESET | Lacks watchdog and manual reset; suited for simpler power-monitoring-only designs | Choose only if 3.3V threshold suffices and watchdog/WDI functionality is unnecessary |
Compared with MAX6320PUK29CY-T, the +T variant offers identical performance with lead-free compliance; versus TPS3808G33DBVR, MAX6320PUK29DY+T provides critical watchdog supervision and tighter 2.93V threshold alignment for systems sensitive to 3.3V rail brownout margins.
Availability
MAX6320PUK29DY+T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical monitors, and smart energy meters requiring stable component supply with AEC-Q100 reliability and open-drain reset flexibility.
Supply support for MAX6320PUK29DY+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, emphasizing high reliability and integration.
MAX6320PUK29DY+T belongs to the MAX6316–MAX6322 family of μP supervisory circuits engineered for robust power monitoring and fail-safe recovery in resource-constrained embedded systems with strict voltage and timing margins.
FAQ
What is the exact reset threshold voltage of MAX6320PUK29DY+T and how tightly is it specified?
The MAX6320PUK29DY+T has a factory-laser-trimmed reset threshold of 2.93V, with tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). At +25°C, the specification is tighter: 2.886V (min) to 2.974V (max). This precision eliminates need for external resistor dividers and ensures consistent brownout detection across environmental stress.
Does MAX6320PUK29DY+T support watchdog functionality, and what is its timeout value?
Yes, MAX6320PUK29DY+T includes a watchdog timer with a typical timeout of 1.6 seconds. It clears on any rising or falling edge at the WDI pin and asserts reset if unserviced for this duration. The timeout is factory-set and cannot be adjusted externally - matching the "Y" suffix in the ordering code per Table 3 of the datasheet.
How does the open-drain RESET output of MAX6320PUK29DY+T interface with different supply voltages?
The open-drain RESET output of MAX6320PUK29DY+T sinks current only and requires an external pullup resistor connected to any voltage rail up to 6V. This allows direct interfacing with 3.3V, 5V, or mixed-voltage systems - for example, pulling RESET to a 5V domain while monitoring a 3.3V VCC rail - without level shifters or voltage conflicts.
What is the minimum supply voltage at which MAX6320PUK29DY+T guarantees valid reset assertion?
MAX6320PUK29DY+T guarantees valid reset assertion down to VCC = 1.0V, as confirmed in Absolute Maximum Ratings and Electrical Characteristics. This ensures reliable brownout detection even during deep undervoltage events, critical for safety-critical and battery-depleted operation scenarios.
Is MAX6320PUK29DY+T qualified for automotive applications, and what standard does it meet?
Yes, MAX6320PUK29DY+T is AEC-Q100 qualified (Grade 1: -40°C to +125°C), meeting stress test requirements for automotive electronic components. Though not marked with "/V", its qualification supports use in automotive body electronics, infotainment power domains, and adjacent industrial applications demanding automotive-grade reliability.
MAX6320PUK29DY+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:
- Active
- 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:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6320PUK29DY+T FAQ
1.How can I place an order for MAX6320PUK29DY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6320PUK29DY+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 MAX6320PUK29DY+T reliable?
The price and inventory of MAX6320PUK29DY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6320PUK29DY+T is usually 5 days.
3.What payment methods are accepted for MAX6320PUK29DY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6320PUK29DY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6320PUK29DY+T?
MAX6320PUK29DY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6320PUK29DY+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 MAX6320PUK29DY+T?
For technical support, including MAX6320PUK29DY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6320PUK29DY+T requirements.
6.How does Aetrix verify that MAX6320PUK29DY+T is sourced from the original manufacturer or authorized distributors?
All MAX6320PUK29DY+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 MAX6320PUK29DY+T meets industry standards.
7.What is the process for return or replacement of MAX6320PUK29DY+T?
All MAX6320PUK29DY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6320PUK29DY+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 MAX6320PUK29DY+T part is unused and in its original packaging.
Return procedure for MAX6320PUK29DY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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