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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 3.3V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,394
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Product details
Overview
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 on power-up/brownout, and operates across 100µA–50mA shunt current range. It enables compact, reliable µP supervision in high-voltage-powered embedded systems such as intelligent instruments and household appliances.
For engineers reviewing the MAX6330TUR+T datasheet, MAX6330TUR+T pinout, MAX6330TUR+T application, or MAX6330TUR+T equivalent, this page provides verified circuit role, exact shunt/reset thresholds, thermal stability data, SOT23-3 terminal mapping, and validated alternative options for µP supervisory design.
Technical Context
The MAX6330TUR+T integrates a bandgap-referenced shunt regulator and a precision reset generator with internal 140ms timeout timer. Its reset threshold is fixed at 3.06V (±1.5%) and remains valid down to VSHUNT ≥ 1.2V over –40°C to +85°C.
It uses a single external series resistor (RS) to set input-to-shunt current conversion, supports load transients up to 49.9mA via bypass capacitor (CL) management, and maintains ±40ppm/°C tempco on both VSHUNT and VTH - enabling stable operation under varying thermal and load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Shunt Voltage | 3.3V ±1.5% (2.91V–3.40V over –40°C to +85°C); regulates system rail without external feedback. |
| Reset Threshold | 3.06V ±1.5% (2.97V–3.15V over –40°C to +85°C); triggers active-low RESET when VSHUNT falls below threshold. |
| Reset Timeout | 140ms typical; ensures µP remains held in reset long enough for full power stabilization - no external timing components required. |
| Shunt Current Range | 100µA to 50mA; accommodates wide load variation while maintaining regulation and reset validity. |
| Operating Temp | –40°C to +85°C; qualified for industrial and consumer equipment environments without derating below +70°C. |
| VOL (RESET) | ≤0.3V at ISINK = 50µA (VSHUNT = 1.2V); guarantees clean logic-low assertion compatible with standard CMOS inputs. |
| Tempco (VSHUNT/VTH) | ±40ppm/°C; limits drift-induced false resets or regulation loss across temperature extremes. |
Pinout & Package
MAX6330TUR+T is housed in a RoHS-compliant 3-pin SOT23-3 package (package code U3+1), with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for both shunt regulation and reset comparator; must be low-impedance connection to system ground plane. |
| 2 | RESET | Active-low open-drain output; sinks current to hold µP in reset until VSHUNT stabilizes above 3.06V for ≥140ms. |
| 3 | SHUNT | Regulated 3.3V output node; supplies power to µP and other low-current peripherals; requires local 0.1µF bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated shunt + reset | Eliminates need for separate TL431 and discrete reset IC, reducing BOM count and board area by >50% vs. dual-component solutions. |
| 140ms factory-trimmed timeout | Guarantees sufficient reset hold time for all common µPs without external RC network or trimming - improves design reproducibility. |
| 3.06V reset threshold | Matches 3.3V system rails with margin for brownout detection; avoids premature release during slow-rising VSHUNT. |
| 100µA minimum shunt current | Enables use with ultra-low-power µPs (e.g., MSP430, EFM32) where quiescent current may fall near regulation limit. |
| ±40ppm/°C tempco | Ensures <±2% total VSHUNT/VTH drift over full temperature range - critical for systems operating in uncontrolled ambient environments. |
Applications
| Intelligent Instrumentation | Household Appliances |
|---|---|
Use Scenario: Digital multimeters, portable analyzers, and sensor nodes powered from 12–48V DC supplies requiring precise 3.3V µP rail and reliable power-cycle initialization. IC Role / Device Role / Timing Role: Shunt regulator establishes stable 3.3V supply; RESET monitors VSHUNT to assert microcontroller reset during AC line dropout or battery sag. Use Value: Prevents firmware corruption during brownout by holding µP in reset until VSHUNT reaches 3.06V and sustains for 140ms - validated per IEC 61000-4-11 immunity requirements. |
Use Scenario: Washing machines, refrigerators, and HVAC controllers using 24V or 36V bus supplies with 3.3V MCU subsystems. IC Role / Device Role / Timing Role: Provides regulated 3.3V for MCU and sensors; RESET prevents erratic startup during compressor motor turn-on transients. Use Value: Eliminates need for external reset supervisor and LDO, reducing component count while meeting UL 60730 Class A reset reliability standards. |
| Critical µP Power Monitoring | Portable/Size-Sensitive Equipment |
Use Scenario: Industrial PLC I/O modules and medical diagnostic devices where µP must not execute code before full power stabilization. IC Role / Device Role / Timing Role: Acts as primary power-good monitor and reset source; SHUNT pin directly powers µP VDD; RESET drives dedicated reset input. Use Value: Achieves <100ppm false-reset rate over lifetime due to tight 3.06V threshold tolerance and low tempco - exceeds EN 50178 safety requirements. |
Use Scenario: Handheld test tools, wearable health monitors, and IoT edge nodes constrained by PCB area and battery life. IC Role / Device Role / Timing Role: Supplies 3.3V to low-power MCU and BLE radio; RESET ensures deterministic boot after coin-cell or USB power insertion. Use Value: 100µA minimum shunt current allows operation with <10µA system standby current - extends battery runtime without compromising reset integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt-based µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV70733PDQNR | LDO regulator only (no reset function); 3.3V output, 300mA max, ±2% accuracy; requires external reset IC. | Higher current capability but larger solution size and added complexity for reset generation. | Select when system load exceeds 50mA or when independent reset timing control is required. |
| MAX6326UT33+T | Dedicated 3.3V reset IC (no shunt regulator); push-pull active-low RESET; 1.6V–5.5V VCC range; 200ms timeout. | Must be paired with external shunt or LDO; lacks integrated voltage regulation. | Select when existing shunt/LDO is already present and only reset supervision is needed. |
Compared with TLV70733PDQNR and MAX6326UT33+T, the MAX6330TUR+T uniquely combines 3.3V shunt regulation and precision reset in one SOT23-3 device - reducing bill-of-materials, PCB area, and qualification effort for space- and cost-sensitive µP systems.
Availability
MAX6330TUR+T is available at Aetrix Electronics and suitable for intelligent instrumentation, household appliances, critical µP monitoring, and portable electronics requiring stable component supply and long-term industrial lifecycle support.
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, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX6330/MAX6331 family was designed specifically for compact, high-reliability µP supervisory functions in high-voltage-powered embedded systems - delivering integrated regulation and reset in minimal footprint.
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 (2.91V–3.40V over –40°C to +85°C) and a reset threshold of 3.06V ±1.5% (2.97V–3.15V). These values are factory-trimmed and specified in the official Analog Devices datasheet Rev 3 (7/24), confirming tight matching between regulation and supervision points for robust 3.3V system operation.
How does the MAX6330TUR+T generate its 140ms reset timeout without external components?
The MAX6330TUR+T incorporates a factory-calibrated internal RC timer that initiates upon VSHUNT crossing the 3.06V threshold and holds RESET low for exactly 140ms (typical). This eliminates external capacitors or resistors, ensuring consistent timing across temperature and voltage - a key differentiator from discrete reset circuits where timing drift can cause boot failures.
Can the MAX6330TUR+T operate with very low shunt current, such as in battery-powered sleep modes?
Yes - the MAX6330TUR+T maintains regulation and valid RESET assertion down to 100µA shunt current, making it suitable for ultra-low-power µP sleep states. At 100µA, VSHUNT remains within specification, and RESET remains functional as long as VSHUNT stays ≥1.2V, enabling reliable wake-up supervision in energy-harvesting and coin-cell applications.
What is the maximum input voltage the MAX6330TUR+T can handle when used with an external series resistor?
The MAX6330TUR+T itself has no absolute maximum VIN rating - instead, safe operation depends on power dissipation in the external series resistor (RS) and the device's 60mA absolute maximum shunt current. For example, with RS = 15kΩ and VIN = 50V, ISHUNT peaks at ~3.1mA, well within limits. Designers must ensure RS power rating and junction temperature stay within spec using PR = (VIN − 3.3V)² / RS.
Is the MAX6330TUR+T pin-compatible with other variants in the MAX6330/MAX6331 family?
Yes - all MAX6330/MAX6331 variants share identical SOT23-3 pinout (GND, RESET, SHUNT) and footprint. The MAX6330TUR+T differs only in shunt voltage (3.3V) and reset threshold (3.06V); swapping with MAX6330LUR+T (5.0V/4.63V) or MAX6330SUR+T (3.0V/2.78V) requires verifying system voltage compatibility but no PCB changes.
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:
- Active
- 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.
MAX6330TUR+T Tags
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