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Analog Devices Inc./Maxim Integrated MAX6333UR22D3+
- Part No.:
- MAX6333UR22D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6333UR22D3+.pdf
- Description:
- POWER SUPPLY SUPPORT CIRCUIT, FI
- Quantity:
- Payment:
- Shipping:
Inventory:1,425
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Product details
Overview
MAX6333UR22D3+ from Maxim Integrated is a push/pull, active-low microprocessor supervisory circuit in a 3-pin SOT23 package, designed for reliable power-on reset generation in 1.8V–3.3V digital systems. It asserts RESET when VCC falls below 2.20V (±3% over temperature), holds it for ≥100ms after VCC recovers, operates down to 0.7V supply, draws only 3.3µA at 2.5V, and rejects fast transients-used in battery-powered controllers and critical µP monitoring.
For engineers reviewing the MAX6333UR22D3+ datasheet, MAX6333UR22D3+ pinout, MAX6333UR22D3+ application, or MAX6333UR22D3+ equivalent, key selection criteria include guaranteed RESET validity to 0.7V VCC, factory-trimmed 2.20V threshold with ±3% tolerance over –40°C to +125°C, 100ms minimum timeout, push/pull output drive capability, and SOT23-3 footprint compatibility with MAX809/MAX6326 families.
Technical Context
The MAX6333UR22D3+ integrates a precision voltage comparator with hysteresis and an internal timer to generate a clean, glitch-immune reset pulse. Its reset threshold is factory-trimmed to 2.20V with ±1.8% typical room-temperature accuracy and ±3% over full temperature range, and its timeout period is fixed at ≥100ms.
It features ultra-low 3.3µA supply current at 2.5V and maintains valid RESET output down to VCC = 0.7V-ensuring deterministic behavior during brownout recovery. The push/pull output drives low to ≤0.4V at 500µA sink and high to ≥0.8×VCC at 200µA source, eliminating external pull-up components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.20V ±3% over –40°C to +125°C - ensures reliable detection of 2.2V supply droop without false triggers |
| Reset Timeout Period | ≥100ms - guarantees sufficient hold time for µP initialization before release |
| Supply Voltage Range | 0.7V to 5.5V - supports operation during deep brownout and enables use with 1.8V/2.5V/3.3V rails |
| Supply Current | 3.3µA at 2.5V, 25°C - minimizes battery drain in portable equipment |
| Output Type | Active-low push/pull - drives RESET directly without external pull-up, compatible with standard µP reset inputs |
| VOL / VOH | ≤0.4V @ 500µA sink / ≥0.8×VCC @ 200µA source - ensures logic-level compatibility across supply voltages |
| Transient Immunity | Rejects <24µs negative VCC glitches at 100mV overdrive - prevents spurious resets from noise |
Pinout & Package
MAX6333UR22D3+ is housed in a RoHS-compliant 3-pin SOT23 package (outline 21-0051, land pattern 90-0179), 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 | Return path for internal comparator and output stage; must be low-impedance connection to system ground |
| 2 (RESET) | Active-low push/pull reset output | Drives low during reset assertion and high during deassertion; no external pull-up required |
| 3 (VCC) | Supply input | Monitored power rail input; powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed operation down to 0.7V VCC | Ensures deterministic reset behavior during severe brownout conditions where most supervisors fail |
| Factory-trimmed 2.20V reset threshold | Eliminates need for external resistor dividers or calibration, reducing BOM count and layout area |
| 100ms minimum reset timeout | Meets or exceeds boot-time requirements of ARM Cortex-M, PIC, and 8051 microcontrollers |
| 3.3µA supply current at 2.5V | Extends battery life in coin-cell–powered IoT sensors and wearables by >10 years in sleep mode |
| Push/pull active-low output | Direct interface to µP reset pins without pull-up resistors, simplifying schematic and improving noise immunity |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered glucose monitors and ECG patches requiring reliable startup after cold start or low-battery wake-up. IC Role / Device Role / Timing Role: Power-on reset generator that asserts RESET until VCC stabilizes above 2.20V and holds it ≥100ms for ADC and BLE radio initialization. Use Value: Valid RESET output down to 0.7V VCC prevents erratic firmware execution during weak battery ramp-up. |
Use Scenario: DIN-rail mounted I/O modules exposed to 24V DC supply fluctuations and EMI in factory automation environments. IC Role / Device Role / Timing Role: Brownout detector that triggers system-wide reset when 3.3V logic rail dips below 2.20V due to load switching or cable drop. Use Value: 24µs transient immunity rejects common-mode noise on VCC, avoiding nuisance resets during relay actuation. |
| Automotive Body Control Units | Smart Energy Meters |
|
Use Scenario: Low-voltage subsystems (e.g., door module MCUs) powered from switched 3.3V rails subject to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Supervisory circuit ensuring MCU reset integrity during battery voltage sag from 12V to <6V, where 3.3V LDO output may dip. Use Value: Guaranteed operation to 0.7V allows continued reset assertion even as VCC collapses-critical for safe state retention. |
Use Scenario: Revenue-grade meters with tamper detection, real-time clock, and isolated RS-485 communication operating from 3.3V backup rail. IC Role / Device Role / Timing Role: Primary reset supervisor for metering SoC, coordinating power-fail interrupt and nonvolatile register save before shutdown. Use Value: Factory-trimmed 2.20V threshold matches 3.3V rail tolerance band, minimizing false resets during line-cycle sags. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | 2.32V reset threshold, 140ms timeout, same SOT23-3 pinout and push/pull output | Higher threshold better suited for 2.5V systems; less margin for 1.8V rails | Select when 2.32V trip point aligns with system VCC tolerance and longer timeout is acceptable |
| TPS3808G125DBVR | 2.25V threshold, 200ms timeout, 1.8V–6V supply, open-drain output | Requires external pull-up; higher quiescent current (12µA); automotive AEC-Q100 qualified | Choose for AEC-Q100 compliance or when open-drain flexibility (e.g., wired-OR reset buses) is needed |
Compared with MAX809TRD3+T and TPS3808G125DBVR, the MAX6333UR22D3+ offers tighter 2.20V threshold matching for 2.2V nominal rails, lower 3.3µA supply current, and guaranteed 0.7V operation-making it optimal for ultra-low-power brownout monitoring where precise trip point and minimal leakage are critical.
Availability
MAX6333UR22D3+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and automotive body control units requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6333UR22D3+ 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 industrial, automotive, communications, and computing applications.
The MAX633x family delivers ultra-low-voltage, low-power µP supervisory circuits optimized for battery-operated and brownout-prone systems-emphasizing guaranteed sub-1V operation, factory-trimmed thresholds, and minimal external components.
FAQ
What is the exact reset threshold voltage for MAX6333UR22D3+?
The MAX6333UR22D3+ has a factory-trimmed reset threshold of 2.20V, with ±1.8% typical tolerance at +25°C and ±3% guaranteed over the full –40°C to +125°C temperature range. This value is confirmed in Table 1 of the official datasheet and applies specifically to the "UR22" suffix variant of the MAX6333 series.
Does MAX6333UR22D3+ require an external pull-up resistor on the RESET pin?
No, the MAX6333UR22D3+ uses a push/pull output structure, so it actively drives both high and low states on the RESET pin. Unlike open-drain supervisors, it does not require an external pull-up resistor-reducing component count and simplifying layout for the MAX6333UR22D3+ design.
What is the minimum supply voltage at which MAX6333UR22D3+ guarantees correct RESET output behavior?
The MAX6333UR22D3+ guarantees correct RESET output state down to VCC = 0.7V, as explicitly stated in the General Description and Absolute Maximum Ratings sections. This ensures reliable reset assertion during deep brownout events where other supervisors may fail-confirming robust behavior for the MAX6333UR22D3+.
Is MAX6333UR22D3+ pin-compatible with MAX809 series devices?
Yes, the MAX6333UR22D3+ shares identical pin configuration (GND, RESET, VCC) and SOT23-3 package dimensions with MAX809/MAX810 devices. This mechanical and functional pin compatibility allows direct replacement in existing layouts without PCB modification for the MAX6333UR22D3+.
What reset timeout period is implemented in MAX6333UR22D3+?
The MAX6333UR22D3+ implements a nominal reset timeout period of 100ms, with a guaranteed minimum of 100ms under all operating conditions. This value is encoded in the "D3" portion of the part number and verified in the Electrical Characteristics table for the MAX6333UR22D3+.
MAX6333UR22D3+ 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:
- 2.2V
- 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
MAX6333UR22D3+ FAQ
1.How can I place an order for MAX6333UR22D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6333UR22D3+ 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 MAX6333UR22D3+ reliable?
The price and inventory of MAX6333UR22D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6333UR22D3+ is usually 5 days.
3.What payment methods are accepted for MAX6333UR22D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6333UR22D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6333UR22D3+?
MAX6333UR22D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6333UR22D3+ 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 MAX6333UR22D3+?
For technical support, including MAX6333UR22D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6333UR22D3+ requirements.
6.How does Aetrix verify that MAX6333UR22D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6333UR22D3+ 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 MAX6333UR22D3+ meets industry standards.
7.What is the process for return or replacement of MAX6333UR22D3+?
All MAX6333UR22D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6333UR22D3+, 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 MAX6333UR22D3+ part is unused and in its original packaging.
Return procedure for MAX6333UR22D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6333UR22D3+ Tags
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MIC826SYMT-TR
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APX803L20-29SA-7
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