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Analog Devices Inc./Maxim Integrated MAX6333UR23D3
- Part No.:
- MAX6333UR23D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6333UR23D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:792
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Product details
Overview
MAX6333UR23D3 from Maxim Integrated is a push/pull active-low microprocessor supervisory circuit in SOT23-3 package, monitoring 1.8V–3.3V power supplies with factory-trimmed 2.30V reset threshold (±1.8% at +25°C, ±3% over –40°C to +125°C), 100ms minimum reset timeout, and guaranteed valid RESET output down to VCC = 0.7V. It ensures reliable power-on/brownout reset for embedded controllers and battery-powered instrumentation.
For engineers reviewing the MAX6333UR23D3 datasheet, MAX6333UR23D3 pinout, MAX6333UR23D3 application, or MAX6333UR23D3 equivalent, key selection criteria include ultra-low 3.3µA supply current at 1.8V, immunity to fast VCC transients, compatibility with high-impedance µP reset inputs, and direct replacement capability for MAX809/MAX6326 in space-constrained designs.
Technical Context
The MAX6333UR23D3 implements a precision bandgap-based voltage comparator with hysteresis and an internal timer controlling the active-low RESET assertion duration. Its reset logic remains functional across VCC = 0.7V to 5.5V, enabling operation during deep brownout conditions where many µPs cease functioning.
Reset timeout is factory-programmed to ≥100ms and temperature-stable (±10% over –40°C to +125°C per typical characterization). The push/pull output drives low with ≤0.3V at 500µA sink (VCC ≥ 1.8V) and high with ≥0.8×VCC at 200µA source (VCC ≥ 1.8V), eliminating external pull-up components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.30V nominal (±1.8% at +25°C); ensures reliable detection of 2.3V supply collapse before µP malfunction |
| Reset Timeout Period | ≥100ms; guarantees sufficient hold time for µP initialization after power recovery |
| Supply Voltage Range | 0.7V to 5.5V; supports operation through severe brownout down to sub-1V levels |
| Supply Current | 3.3µA typical at VCC = 1.8V; enables multi-year battery life in portable equipment |
| Output Type | Active-low push/pull; drives RESET directly without external pull-up, reducing BOM count |
| Operating Temperature | –40°C to +125°C; qualified for automotive under-hood and industrial control environments |
| VCC Transient Immunity | Rejects <24µs negative glitches at 10V/ms slew rate; prevents false resets from noise |
Pinout & Package
MAX6333UR23D3 is housed in a 3-pin SOT23-3 package (outline 21-0051), with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for PCB area-constrained applications such as wearables and sensor nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-low push/pull output; asserts low during VCC undervoltage and holds for ≥100ms post-recovery |
| 3 | VCC | Power input (0.7V–5.5V); powers internal circuitry and defines reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low operating voltage | Functional down to VCC = 0.7V - maintains reset integrity when main supply collapses below 1V |
| Precision reset threshold | Factory-trimmed 2.30V ±1.8% at +25°C ensures accurate detection of 2.3V rail failure without calibration |
| No external components required | Integrated comparator, timer, and push/pull driver eliminate resistors, capacitors, and discrete transistors |
| Transient-immune reset detection | Rejects VCC glitches <24µs wide - prevents spurious resets from switching noise or ESD events |
| High-temperature reliability | Specified over –40°C to +125°C with ±3% threshold drift - suitable for engine control and industrial PLCs |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: Programmable logic controllers monitor 2.3V I/O power rails in factory automation systems subject to voltage sags and EMI. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to halt CPU execution until 2.3V rail stabilizes for ≥100ms. Use Value: Prevents corrupted firmware writes during brownout by guaranteeing reset hold time exceeds µP boot sequence requirements. |
Use Scenario: Handheld glucose meters powered by single-cell Li-ion batteries experiencing discharge-induced voltage droop below 2.3V. IC Role / Device Role / Timing Role: Reset generator monitoring battery voltage and forcing controlled shutdown before data loss occurs. Use Value: Enables >5-year shelf life via 3.3µA quiescent current while ensuring deterministic restart at 2.3V threshold. |
| Automotive Body Control Modules | Smart Sensor Nodes |
Use Scenario: Under-hood BCMs exposed to –40°C cold cranking and +125°C ambient, with 2.3V CAN transceiver supply. IC Role / Device Role / Timing Role: High-temp-stable supervisor asserting RESET during ignition transients and thermal cycling. Use Value: Maintains ±3% reset threshold accuracy across full temperature range, preventing false resets in harsh environments. |
Use Scenario: Wireless environmental sensors using ultra-low-power µCs that require precise 2.3V brownout detection. IC Role / Device Role / Timing Role: Power-monitoring IC triggering controlled sleep mode entry when supply falls below 2.30V. Use Value: Eliminates need for µC's internal ADC-based monitoring, saving 200+ µA active current and simplifying firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UR23D3-T | Same 2.30V threshold and 100ms timeout, but specified only to +85°C (vs. +125°C) | Limited to commercial/industrial ambient, not automotive under-hood | Select MAX6333UR23D3 for extended temperature operation; MAX6326UR23D3 suffices for cost-sensitive consumer designs |
| TPS3123E18DBVR | 2.32V threshold (±0.5%), 200ms timeout, 1.8V–6V supply, but 8µA ICC at 1.8V (vs. 3.3µA) | Higher accuracy but higher quiescent current; no VCC = 0.7V operation | Choose TPS3123E18DBVR when tighter threshold tolerance is critical; MAX6333UR23D3 preferred for ultra-low-power battery systems |
Compared with MAX6326UR23D3-T and TPS3123E18DBVR, the MAX6333UR23D3 uniquely combines 0.7V operational floor, 3.3µA supply current, and +125°C qualification - making it optimal for long-life, high-reliability embedded systems where supply collapse and thermal stress coexist.
Availability
MAX6333UR23D3 is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, automotive body modules, and smart sensor nodes requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for MAX6333UR23D3 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 power management, sensing, and interface applications, with emphasis on high-reliability industrial and automotive markets.
The MAX6333 series belongs to Maxim's ultra-low-voltage supervisory product line, engineered specifically for reliable reset generation in battery-powered and thermally demanding systems where traditional supervisors fail below 1V.
FAQ
What is the exact reset threshold voltage for MAX6333UR23D3?
The MAX6333UR23D3 has a factory-trimmed nominal reset threshold of 2.30V, with tolerance of ±1.8% at +25°C and ±3% over the full –40°C to +125°C operating range. This value is confirmed in Table 1 of the official datasheet and applies specifically to the "UR23" suffix variant of the MAX6333 family.
Does MAX6333UR23D3 support operation below 1.0V supply voltage?
Yes, the MAX6333UR23D3 is guaranteed to function correctly down to VCC = 0.7V, maintaining valid RESET assertion and timing behavior. This capability is explicitly documented in the Absolute Maximum Ratings and Electrical Characteristics tables, distinguishing it from the MAX6334 (min 1.0V) and enabling use in deep-brownout scenarios.
What is the reset timeout period for MAX6333UR23D3?
The MAX6333UR23D3 provides a minimum reset timeout period of 100ms, as indicated by the "D3" suffix in its part number. This value is factory-programmed and verified across temperature; typical values range from 100ms to 200ms depending on process variation and operating conditions.
Is MAX6333UR23D3 pin-compatible with MAX809?
Yes, the MAX6333UR23D3 is pin-compatible with the MAX809 in the SOT23-3 package: Pin 1 = GND, Pin 2 = RESET (active-low push/pull), Pin 3 = VCC. This compatibility is explicitly stated in the Benefits and Features section and validated in the Typical Operating Circuit diagram.
What is the maximum supply current of MAX6333UR23D3 at 1.8V?
The MAX6333UR23D3 draws a typical supply current of 3.3µA at VCC = 1.8V and TA = +25°C, with a maximum of 6.0µA across temperature and process. This ultra-low quiescent current is measured under no-load conditions and enables multi-year battery operation in portable equipment.
MAX6333UR23D3 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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.3V
- 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
MAX6333UR23D3 FAQ
1.How can I place an order for MAX6333UR23D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6333UR23D3 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 MAX6333UR23D3 reliable?
The price and inventory of MAX6333UR23D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6333UR23D3 is usually 5 days.
3.What payment methods are accepted for MAX6333UR23D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6333UR23D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6333UR23D3?
MAX6333UR23D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6333UR23D3 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 MAX6333UR23D3?
For technical support, including MAX6333UR23D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6333UR23D3 requirements.
6.How does Aetrix verify that MAX6333UR23D3 is sourced from the original manufacturer or authorized distributors?
All MAX6333UR23D3 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 MAX6333UR23D3 meets industry standards.
7.What is the process for return or replacement of MAX6333UR23D3?
All MAX6333UR23D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6333UR23D3, 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 MAX6333UR23D3 part is unused and in its original packaging.
Return procedure for MAX6333UR23D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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