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Analog Devices Inc./Maxim Integrated MAX6333UR20D3+T
- Part No.:
- MAX6333UR20D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6333UR20D3+T.pdf
- Description:
- IC MPU/RESET CIRC 2.00V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
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Product details
Overview
The MAX6333UR20D3+T from Maxim Integrated is a push/pull active-low microprocessor supervisory circuit in SOT23-3 package, designed for 1.8V–3.3V digital systems. It monitors VCC and asserts RESET when supply drops below 2.00V (±1.8% at +25°C), maintaining reset for ≥100ms after VCC recovers. Its ultra-low 3.3µA supply current and guaranteed operation down to 0.7V support battery-powered instrumentation and critical μP power monitoring.
For engineers reviewing the MAX6333UR20D3+T datasheet, MAX6333UR20D3+T pinout, MAX6333UR20D3+T application, or MAX6333UR20D3+T equivalent, key selection criteria include factory-trimmed 2.0V reset threshold, 100ms minimum timeout, push/pull output drive capability, SOT23-3 footprint compatibility with MAX809/MAX6326, and guaranteed RESET validity to VCC = 0.7V.
Technical Context
This device implements a precision voltage comparator with hysteresis-free threshold detection and an internal timer for fixed reset timeout. The reset comparator ignores transients ≤24µs at 10V/ms slew rate, ensuring immunity to fast supply glitches. Its push/pull output delivers VOH ≥0.8×VCC (ISOURCE = 200µA, VCC ≥1.8V) and VOL ≤0.3V (ISINK = 500µA, VCC ≥1.8V).
Operating across –40°C to +125°C, it maintains ±3% reset threshold accuracy over full temperature range and exhibits normalized timeout stability within ±25% over temperature. Supply current remains stable at 3.3µA (typ) at VCC = 2.5V and +25°C, rising only marginally to 6.0µA (max) at VCC = 1.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.00V ±1.8% at +25°C; ±3% over –40°C to +125°C - ensures reliable brownout detection for 1.8V/2.5V rails |
| Reset Timeout Period | ≥100ms - guarantees sufficient hold time for μP initialization and peripheral stabilization |
| Supply Voltage Range | 0.7V to 5.5V - enables operation during deep brownout and supports wide input rail flexibility |
| Supply Current | 3.3µA (typ) at VCC = 2.5V - minimizes quiescent load in always-on battery-backed systems |
| Output Type | Active-low push/pull - drives RESET directly without external pull-up; sinks 500µA at VOL ≤0.3V |
| Operating Temperature | –40°C to +125°C - qualified for industrial and automotive under-hood environments |
| VCC Propagation Delay | 24µs (max) at 10V/ms - rejects short-duration supply transients without false resets |
Pinout & Package
MAX6333UR20D3+T is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. Pin 1 = GND, Pin 2 = RESET (active-low push/pull), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 (RESET) | Active-low reset output | Push/pull driver asserts logic-low during VCC fault and timeout; compatible with standard CMOS μP reset inputs |
| 3 (VCC) | Supply input | Power source for internal circuitry; accepts 0.7V–5.5V; decoupling capacitor (0.1µF) required within 5mm |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.0V reset threshold | Eliminates external resistor networks and calibration; meets ±1.8% tolerance at +25°C for precise 1.8V rail supervision |
| 100ms minimum reset timeout | Ensures μP and peripherals complete power-up sequencing before release; avoids premature execution |
| 0.7V minimum operating voltage | Guarantees valid RESET assertion even during severe brownout-critical for fail-safe shutdown in portable equipment |
| 3.3µA typical supply current | Extends battery life in always-on monitoring applications; enables >10-year operation on coin-cell sources |
| SOT23-3 footprint | Minimizes PCB area; enables drop-in replacement for MAX809/MAX6326 in space-constrained designs |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Real-time control logic in programmable logic controllers subjected to 24V DC supply fluctuations and EMI-induced transients. IC Role / Device Role / Timing Role: Supervises 3.3V logic rail and asserts active-low RESET to halt CPU execution during undervoltage events. Use Value: Prevents corrupted I/O state and firmware lockup by guaranteeing ≥100ms reset hold time and rejecting <24µs supply glitches. |
Use Scenario: Battery-powered ECG and pulse oximeter devices requiring continuous low-power operation and safe shutdown on battery depletion. IC Role / Device Role / Timing Role: Monitors 1.8V analog front-end and 3.3V MCU supply; triggers controlled shutdown before VCC falls below 2.0V. Use Value: Enables >5-year battery life via 3.3µA quiescent current and ensures deterministic reset behavior down to 0.7V VCC. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Under-hood body electronics exposed to cold-crank (≤6V) and load-dump (≤40V) conditions per ISO 7637-2. IC Role / Device Role / Timing Role: Resets microcontroller upon 12V system rail collapse to 2.0V; operates reliably from –40°C to +125°C. Use Value: Maintains ±3% reset threshold accuracy across full automotive temperature range and survives 5.5V absolute max VCC stress. |
Use Scenario: Revenue-grade electricity meters deployed in uncontrolled ambient environments with long-term field deployment. IC Role / Device Role / Timing Role: Supervises isolated 3.3V communication interface and metrology SoC supply to prevent data corruption during AC line sags. Use Value: Delivers 100ms reset timeout and glitch immunity to ensure accurate energy accumulation across decades of service. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UR20D3+T | Same 2.0V threshold and 100ms timeout; identical SOT23-3 package and push/pull output; differs in internal bandgap reference architecture and transient immunity profile | Valid for same industrial and portable applications but not qualified to same AEC-Q100 stress levels as MAX6333 series | Select when legacy design reuse or second-source qualification is prioritized over extended temperature margin |
| TPS3123E18DBVR | 2.0V threshold, 200ms timeout, open-drain output; requires external pull-up; higher 8µA supply current; rated –40°C to +125°C | Compatible for non-critical reset timing where longer timeout and open-drain flexibility are acceptable | Choose when interfacing with bidirectional μP reset pins or when board-level pull-up already exists |
Compared with MAX6333UR20D3+T, MAX6326UR20D3+T offers identical electrical specs but reduced transient rejection margin, while TPS3123E18DBVR trades push/pull simplicity for open-drain versatility and longer timeout-neither is pin-compatible, requiring layout revision.
Availability
MAX6333UR20D3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and automotive body control modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX6333UR20D3+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The MAX6333 series belongs to Maxim's precision supervisory circuits product line, engineered for ultra-low-voltage, low-power microprocessor reset generation in space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6333UR20D3+T and how stable is it over temperature?
The MAX6333UR20D3+T has a factory-trimmed nominal reset threshold of 2.00V, with ±1.8% tolerance at +25°C and ±3% over the full –40°C to +125°C operating range. This stability ensures consistent brownout detection across environmental extremes without external calibration. The MAX6333UR20D3+T achieves this via laser-trimmed internal resistive divider and precision bandgap reference.
Does MAX6333UR20D3+T support operation during deep brownout conditions?
Yes, the MAX6333UR20D3+T is guaranteed to assert and maintain a valid RESET signal down to VCC = 0.7V, enabling fail-safe operation during severe supply collapse. Its internal circuitry remains functional and its push/pull output sustains VOL ≤0.3V (at ISINK = 500µA) even at this minimum supply, making the MAX6333UR20D3+T suitable for battery-depletion protection in portable systems.
What is the reset timeout period of MAX6333UR20D3+T and is it adjustable?
The MAX6333UR20D3+T provides a fixed minimum reset timeout period of 100ms after VCC rises above the 2.00V threshold. This value is factory-programmed and non-adjustable; it ensures sufficient hold time for microprocessor and peripheral initialization. The "D3" suffix in MAX6333UR20D3+T explicitly denotes the 100ms variant, distinguishing it from D1 (1ms) and D2 (20ms) versions.
Can MAX6333UR20D3+T replace MAX809 in an existing design?
Yes, the MAX6333UR20D3+T is pin-compatible with MAX809 (SOT23-3, Pin 1=GND, Pin 2=RESET, Pin 3=VCC) and shares identical 2.0V reset threshold and push/pull output structure. However, the MAX6333UR20D3+T offers lower 3.3µA supply current versus MAX809's ~10µA and guaranteed operation down to 0.7V versus MAX809's 1.0V minimum, making the MAX6333UR20D3+T a direct upgrade in most cases.
What package type and RoHS status does MAX6333UR20D3+T use?
The MAX6333UR20D3+T uses a 3-pin SOT23-3 package (outline 21-0051) with lead-free termination, indicated by the "+T" suffix. It complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1). The package measures 2.9mm × 1.6mm × 1.1mm and is optimized for reflow soldering at peak temperatures up to +260°C.
MAX6333UR20D3+T 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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2V
- 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
MAX6333UR20D3+T FAQ
1.How can I place an order for MAX6333UR20D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6333UR20D3+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 MAX6333UR20D3+T reliable?
The price and inventory of MAX6333UR20D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6333UR20D3+T is usually 5 days.
3.What payment methods are accepted for MAX6333UR20D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6333UR20D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6333UR20D3+T?
MAX6333UR20D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6333UR20D3+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 MAX6333UR20D3+T?
For technical support, including MAX6333UR20D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6333UR20D3+T requirements.
6.How does Aetrix verify that MAX6333UR20D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6333UR20D3+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 MAX6333UR20D3+T meets industry standards.
7.What is the process for return or replacement of MAX6333UR20D3+T?
All MAX6333UR20D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6333UR20D3+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 MAX6333UR20D3+T part is unused and in its original packaging.
Return procedure for MAX6333UR20D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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