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Analog Devices Inc./Maxim Integrated MAX6333UR16D3+
- Part No.:
- MAX6333UR16D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6333UR16D3+.pdf
- Description:
- MAX6333 3-PIN, ULTRA-LOW-VOLTAGE
- Quantity:
- Payment:
- Shipping:
Inventory:970
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Product details
Overview
MAX6333UR16D3+ from Maxim Integrated is a 3-pin SOT23 ultra-low-voltage microprocessor supervisory circuit with push/pull active-low RESET output, 1.60V factory-trimmed reset threshold (±1.8% at +25°C, ±3% over -40°C to +125°C), 100ms minimum reset timeout, and guaranteed operation down to VCC = 0.7V. It monitors 1.8V/2.5V power rails in space-constrained embedded systems requiring reliable brownout detection without external components.
For engineers reviewing the MAX6333UR16D3+ datasheet, MAX6333UR16D3+ pinout, MAX6333UR16D3+ application, or MAX6333UR16D3+ equivalent, this device serves as a precision, low-quiescent-current (3.3µA typical at 2.5V) reset supervisor for battery-powered controllers, automotive ECUs, and portable instrumentation where supply voltage stability below 2.0V must trigger deterministic reset assertion.
Technical Context
The MAX6333UR16D3+ integrates a precision bandgap-based reset comparator with hysteresis and an internal timer that asserts RESET low when VCC falls below 1.60V and holds it for ≥100ms after VCC rises above threshold. Its comparator rejects transients ≤24µs at 10V/ms slew rate, ensuring immunity to short-duration supply glitches.
This variant belongs to the MAX6333 family of push/pull active-low supervisors and shares pin compatibility with MAX809/MAX810 and MAX6326–MAX6328. It operates across -40°C to +125°C with full electrical specification, including VOL ≤0.4V at ISINK = 500µA (VCC ≥1.8V) and VOH ≥0.8VCC at ISOURCE = 200µA (VCC ≥1.8V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.60V ±1.8% (25°C), ±3% (-40°C to +125°C); ensures accurate brownout detection for 1.8V logic domains |
| Reset Timeout Period | 100ms minimum; guarantees sufficient processor initialization time after power recovery |
| Supply Current | 3.3µA typical at VCC = 2.5V; enables multi-year battery life in always-on monitoring applications |
| Operating Voltage Range | 0.7V to 5.5V; supports valid RESET assertion during deep brownout and full rail operation |
| Output Type | Push/pull active-low RESET; eliminates need for external pull-up resistor and simplifies µP interface |
| VCC Propagation Delay | 24µs max at 10V/ms VCC fall rate; provides fast response to rapid supply collapse |
| RESET Output Low Voltage | ≤0.4V at ISINK = 500µA (VCC ≥1.8V); ensures solid logic-low level for CMOS inputs |
Pinout & Package
MAX6333UR16D3+ is housed in a RoHS-compliant 3-pin SOT23 package (outline 21-0051, land pattern 90-0179), optimized for high-density PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be connected directly to system ground plane |
| 2 | RESET | Active-low push/pull reset output; drives low during VCC undervoltage and for ≥100ms post-recovery |
| 3 | VCC | Power supply input (0.7V–5.5V); powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low operating voltage | Functional RESET assertion down to VCC = 0.7V - critical for fail-safe behavior in deep brownout conditions |
| Precision reset threshold | Factory-trimmed 1.60V with ±1.8% room-temp tolerance - eliminates manual calibration and external resistors |
| Transient immunity | Rejects VCC glitches ≤24µs at 10V/ms - prevents spurious resets from switching noise or ESD coupling |
| No external components | Self-contained reset generation - reduces BOM count, board area, and qualification effort |
| High-temp reliability | Full specification over -40°C to +125°C - validated for under-hood automotive and industrial control use |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Monitor |
|---|---|
Use Scenario: Power supply supervision during cold-crank (battery dip to 6V) and stop-start cycling. IC Role / Device Role / Timing Role: Reset supervisor asserting active-low signal to MCU when 12V-to-3.3V LDO output drops below 1.60V. Use Value: Prevents MCU lockup or corrupted EEPROM writes during transient undervoltage events common in vehicle electrical systems. |
Use Scenario: Battery-powered handheld vital-signs analyzer with 1.8V SoC and intermittent sensor activation. IC Role / Device Role / Timing Role: Brownout detector triggering controlled shutdown before 1.8V rail collapses below logic threshold. Use Value: Enables graceful state save and power-off sequencing using only 3.3µA quiescent current between measurements. |
| Industrial PLC I/O Module | Smart Energy Meter |
Use Scenario: Monitoring isolated 2.5V auxiliary supply feeding FPGA configuration memory and ADC reference. IC Role / Device Role / Timing Role: Precision reset generator holding FPGA in reset until 2.5V rail stabilizes post-power-up. Use Value: Eliminates configuration errors caused by marginal VCC during power ramp, verified across -40°C to +85°C operating range. |
Use Scenario: Tamper-resistant meter with backup supercapacitor maintaining RTC and secure boot during main AC loss. IC Role / Device Role / Timing Role: Supervisor detecting 1.8V backup rail sag and initiating secure shutdown before cryptographic keys become unstable. Use Value: Guarantees 100ms minimum reset hold time to complete AES key erasure and nonvolatile flag setting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | 1.63V reset threshold (±2.5%), 240ms timeout, same SOT23-3 package and push/pull output | Larger threshold tolerance and longer timeout reduce design margin for fast-recovery 1.8V systems | Select when longer reset hold time is acceptable and tighter threshold spec is not required |
| TPS3808G16DBVR | 1.60V threshold (±0.5%), 200ms timeout, 1.5µA ICC, but requires external capacitor for timeout adjustment | Lower quiescent current but adds BOM cost and layout complexity vs. factory-programmed fixed timeout | Prefer for ultra-low-power designs where timeout flexibility justifies added component count |
Compared with MAX809TRD3+T and TPS3808G16DBVR, the MAX6333UR16D3+ delivers tighter threshold accuracy (±1.8% vs. ±2.5%/±0.5%), fixed 100ms timeout without external parts, and proven robustness in automotive-grade thermal cycling - making it optimal for cost-sensitive, space-constrained 1.8V systems needing deterministic reset timing.
Availability
MAX6333UR16D3+ is available at Aetrix Electronics and suitable for automotive engine control units, portable medical monitors, industrial PLC I/O modules, smart energy meters, and battery-backed instrumentation requiring stable component supply with full temperature-range validation and RoHS-compliant packaging.
Supply support for MAX6333UR16D3+ 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, mixed-signal, and power-management ICs for demanding industrial, automotive, and computing applications.
The MAX6333UR16D3+ belongs to Maxim's µP supervisory product line, engineered specifically for reliable power-on reset, brownout detection, and supply monitoring in low-voltage embedded systems operating from 0.7V to 5.5V.
FAQ
What is the exact reset threshold voltage of MAX6333UR16D3+ and how does it vary with temperature?
The MAX6333UR16D3+ has a factory-trimmed nominal reset threshold of 1.60V, with ±1.8% tolerance at +25°C and ±3% tolerance over the full -40°C to +125°C operating range. This means the actual threshold falls between 1.55V and 1.65V at room temperature, and between 1.52V and 1.68V across temperature extremes - ensuring consistent brownout detection for 1.8V logic systems.
Does MAX6333UR16D3+ require any external components to function as a reset supervisor?
No, the MAX6333UR16D3+ is fully self-contained and requires no external resistors, capacitors, or diodes. Its 1.60V threshold is factory-trimmed, its 100ms reset timeout is internally programmed, and its push/pull RESET output drives directly into a microcontroller's reset pin - eliminating BOM additions and layout dependencies.
Can MAX6333UR16D3+ operate reliably during severe supply transients, such as those seen in automotive cold-crank conditions?
Yes, the MAX6333UR16D3+ reset comparator is designed to reject fast negative-going VCC transients: it ignores pulses ≤24µs wide when VCC falls at 10V/ms. This immunity prevents false resets during load-dump spikes or alternator ripple, making it suitable for under-hood automotive applications where supply stability is compromised.
What is the supply current consumption of MAX6333UR16D3+ at 1.8V and 2.5V supply voltages?
The MAX6333UR16D3+ draws 3.0µA typical at VCC = 1.8V and 3.3µA typical at VCC = 2.5V (TA = +25°C, no load). This ultra-low quiescent current enables multi-year operation from coin-cell batteries in portable instrumentation and wireless sensors where standby power budget is constrained.
Is MAX6333UR16D3+ pin-compatible with legacy supervisory ICs like MAX809?
Yes, the MAX6333UR16D3+ uses the same 3-pin SOT23 footprint and pinout (GND, RESET, VCC) as MAX809/MAX810 and MAX6326–MAX6328. This allows drop-in replacement in existing designs without PCB modification, provided the reset threshold (1.60V) and timeout (100ms) meet system requirements.
MAX6333UR16D3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.6V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6333UR16D3+ FAQ
1.How can I place an order for MAX6333UR16D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6333UR16D3+ 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 MAX6333UR16D3+ reliable?
The price and inventory of MAX6333UR16D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6333UR16D3+ is usually 5 days.
3.What payment methods are accepted for MAX6333UR16D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6333UR16D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6333UR16D3+?
MAX6333UR16D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6333UR16D3+ 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 MAX6333UR16D3+?
For technical support, including MAX6333UR16D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6333UR16D3+ requirements.
6.How does Aetrix verify that MAX6333UR16D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6333UR16D3+ 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 MAX6333UR16D3+ meets industry standards.
7.What is the process for return or replacement of MAX6333UR16D3+?
All MAX6333UR16D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6333UR16D3+, 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 MAX6333UR16D3+ part is unused and in its original packaging.
Return procedure for MAX6333UR16D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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