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Analog Devices Inc./Maxim Integrated MAX6330TUR-T
- Part No.:
- MAX6330TUR-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6330TUR-T.pdf
- Description:
- IC VREF SHUNT 1.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,541
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Product details
Overview
The MAX6330TUR-T from Analog Devices is a precision shunt regulator with integrated active-low power-on reset function in a 3-pin SOT23-3 package. It delivers a regulated 3.3V shunt voltage (±1.5% tolerance), asserts RESET for 140ms after VSHUNT exceeds 3.06V, and operates across -40°C to +85°C - enabling reliable µP supervision in high-voltage microcontroller systems such as smart appliances and portable instrumentation.
For engineers reviewing the MAX6330TUR-T datasheet, MAX6330TUR-T pinout, MAX6330TUR-T application, or MAX6330TUR-T equivalent, key selection criteria include its 3.06V reset threshold, 3.3V shunt regulation, 100µA–50mA shunt current range, 140ms fixed timeout, and SOT23-3 footprint compatibility with space-constrained embedded designs.
Technical Context
The MAX6330TUR-T integrates a bandgap-referenced shunt regulator and a precision reset generator with internal 140ms timeout timer. Its reset logic triggers when VSHUNT falls below 3.06V (±1.5% over temperature) and holds RESET low for the full timeout period after recovery - independent of external components.
As a two-terminal shunt device with three-pin packaging, it sinks current via the SHUNT pin to regulate voltage while driving an active-low push/pull RESET output referenced to GND. The device maintains ±40ppm/°C tempco on both VSHUNT and VTH, ensuring stable operation across industrial temperature ranges without calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Shunt Voltage | 3.3V ±1.5% at +25°C; 3.20V to 3.40V over -40°C to +85°C - ensures accurate system rail regulation under thermal stress |
| Reset Threshold | 3.06V ±1.5% at +25°C; 2.97V to 3.15V over temperature - guarantees deterministic µP reset initiation during brownout |
| Reset Timeout | 140ms typical - provides sufficient hold time for µP initialization without external timing components |
| Shunt Current Range | 100µA to 50mA - supports wide load variation while maintaining regulation and reset validity |
| Output Drive | RESET sink capability: 3.2mA at 0.4V - directly interfaces with standard CMOS µP reset inputs |
| Tempco | ±40ppm/°C for both VSHUNT and VTH - minimizes drift-induced false resets in thermally varying environments |
| Package | SOT23-3 - enables board area reduction vs. discrete regulator + reset IC solutions |
Pinout & Package
SOT23-3 package with 1.3mm × 2.9mm footprint, 0.95mm height, and gull-wing leads; RoHS-compliant lead-free variant available as MAX6330TUR+T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for both shunt regulation and RESET output; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-low push/pull reset output; sinks up to 3.2mA at 0.4V to assert µP reset; invalid below VSHUNT = 1.2V |
| 3 | SHUNT | Regulated shunt voltage node (3.3V); sinks all excess current from RS to maintain precise VSHUNT under varying load |
Key Features
| Feature | Design Value |
|---|---|
| Integrated shunt + reset | Eliminates need for separate voltage reference, comparator, and timer - reduces BOM count and layout complexity |
| No external timing components | 140ms reset timeout generated internally - removes capacitor tolerance and aging effects from reset timing accuracy |
| High transient immunity | Valid RESET assertion maintained during short negative-going VSHUNT glitches - improves robustness in noisy power environments |
| Wide shunt current range | Operates reliably from 100µA (low-power sleep) to 50mA (full-load) - accommodates dynamic µP current profiles |
| Stable over temperature | ±40ppm/°C tempco on both regulation and reset thresholds - avoids thermal hysteresis-induced spurious resets |
Applications
| Smart Home Controllers | Portable Medical Instruments |
|---|---|
Use Scenario: Microcontroller-based HVAC controllers powered from 12–24V DC rails with intermittent load switching. IC Role / Device Role / Timing Role: Provides 3.3V regulated supply and active-low reset signal synchronized to VSHUNT stability. Use Value: Prevents firmware lockup during relay-induced supply droop by asserting RESET until VSHUNT recovers above 3.06V and holds for 140ms. | Use Scenario: Battery-powered glucose meters requiring guaranteed µP startup after battery insertion or replacement. IC Role / Device Role / Timing Role: Acts as combined voltage supervisor and power-on reset generator with no external timing parts. Use Value: Ensures complete µP initialization before sensor sampling begins, eliminating corrupted ADC readings due to premature wake-up. |
| Industrial PLC I/O Modules | Energy Metering Subsystems |
Use Scenario: DIN-rail mounted programmable logic controller modules exposed to 40–85°C ambient temperatures. IC Role / Device Role / Timing Role: Precision shunt regulator and reset monitor tolerant of wide thermal swings and input ripple. Use Value: Maintains ±1.5% VSHUNT and ±1.5% VTH across full temperature range, preventing false resets during thermal transients. | Use Scenario: Revenue-grade electricity meters using isolated µPs powered from auxiliary 12V supplies derived from mains. IC Role / Device Role / Timing Role: Supervises µP power rail derived from high-voltage auxiliary supply with minimal component count. Use Value: Enables compact, cost-effective design by replacing discrete TL431 + reset IC solution while improving long-term stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt-regulator-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326TUR-T | Same 3.3V shunt, but 3.06V reset threshold with 200ms timeout; higher quiescent current (1.5µA vs. 1.0µA) | Preferred where longer reset hold time is required for complex boot sequences | Select MAX6326TUR-T only if 200ms timeout is explicitly needed; otherwise MAX6330TUR-T offers tighter tolerance and lower IQ |
| TLV70333DBVR | 3.3V LDO (not shunt); no integrated reset; requires external RC timer for reset generation | Applicable only when system uses low-dropout linear regulation instead of shunt topology | Choose TLV70333DBVR only if input-to-output differential is <1.5V and external reset timing is acceptable |
Compared with MAX6326TUR-T and TLV70333DBVR, the MAX6330TUR-T uniquely combines precision 3.3V shunt regulation, 3.06V reset threshold, and fixed 140ms timeout in a single SOT23-3 package - delivering lowest component count and highest thermal stability for high-voltage µP supervision.
Availability
MAX6330TUR-T is available at Aetrix Electronics and suitable for smart home controllers, portable medical instruments, and industrial PLC I/O modules requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6330TUR-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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The MAX6330 series belongs to Analog Devices' precision supervisory circuits product line, designed specifically for cost-sensitive, space-constrained microprocessor systems requiring reliable power-on reset and rail supervision from high-voltage sources.
FAQ
What is the exact shunt voltage and reset threshold of the MAX6330TUR-T?
The MAX6330TUR-T provides a nominal shunt voltage of 3.3V with ±1.5% tolerance over temperature, and a reset threshold of 3.06V (also ±1.5%). These values are confirmed in the Electrical Characteristics table for the "T" suffix variant, with VSHUNT ranging from 3.20V to 3.40V and VTH from 2.97V to 3.15V across -40°C to +85°C. The MAX6330TUR-T achieves this using a trimmed bandgap reference and matched resistor network.
Does the MAX6330TUR-T require external capacitors for stable operation?
Yes - the MAX6330TUR-T requires a bypass capacitor (CL) on the SHUNT pin for stable regulation. The datasheet specifies a minimum of 0.03µF to ensure stability across the full 100µA–50mA shunt current range. Typical designs use 0.1µF ceramic, placed close to the SHUNT pin. Omitting CL risks oscillation or excessive VSHUNT overshoot during load transients - behavior confirmed in Figure 2 through Figure 4 of the MAX6330TUR-T datasheet.
Can the MAX6330TUR-T drive a microprocessor reset pin directly?
Yes - the MAX6330TUR-T's active-low RESET output is a push/pull driver capable of sinking 3.2mA at 0.4V, which meets standard CMOS µP reset input requirements. However, for µPs with bidirectional reset pins (e.g., Motorola 68HC11), a 4.7kΩ series resistor is recommended between RESET and the µP pin to prevent contention. This interface method is validated in Figure 6 of the MAX6330TUR-T datasheet and ensures deterministic logic levels during reset assertion.
What is the operating temperature range and thermal derating for the MAX6330TUR-T?
The MAX6330TUR-T is rated for -40°C to +85°C operation. Its SOT23-3 package has a thermal resistance of 0.25°C/mW junction-to-ambient when soldered on a PCB. To maintain junction temperature below +150°C, power dissipation must be derated above +70°C at 4mW/°C. At maximum 50mA shunt current and 3.3V, worst-case power is ~165mW - well within the 320mW limit at +70°C, but requires derating to ~280mW at +85°C per the Absolute Maximum Ratings table.
How does the MAX6330TUR-T handle brownout conditions?
During brownout, when VSHUNT drops below 3.06V, the MAX6330TUR-T immediately asserts RESET low. If VSHUNT recovers above threshold, the internal 140ms timer restarts and holds RESET low for the full duration. This behavior prevents µP execution during marginal supply conditions. The device remains valid down to VSHUNT = 1.2V (at -40°C to +85°C), ensuring robust reset assertion even during deep sags - a feature verified in the Detailed Description section and Typical Operating Characteristics plots of the MAX6330TUR-T datasheet.
MAX6330TUR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 50 mA
- Tolerance:
- ±1.5%
- Temperature Coefficient:
- 40ppm/°C Typical
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 60 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6330TUR-T FAQ
1.How can I place an order for MAX6330TUR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6330TUR-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 MAX6330TUR-T reliable?
The price and inventory of MAX6330TUR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6330TUR-T is usually 5 days.
3.What payment methods are accepted for MAX6330TUR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6330TUR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6330TUR-T?
MAX6330TUR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6330TUR-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 MAX6330TUR-T?
For technical support, including MAX6330TUR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6330TUR-T requirements.
6.How does Aetrix verify that MAX6330TUR-T is sourced from the original manufacturer or authorized distributors?
All MAX6330TUR-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 MAX6330TUR-T meets industry standards.
7.What is the process for return or replacement of MAX6330TUR-T?
All MAX6330TUR-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6330TUR-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 MAX6330TUR-T part is unused and in its original packaging.
Return procedure for MAX6330TUR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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