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Analog Devices Inc./Maxim Integrated MAX6334UR22D3
- Part No.:
- MAX6334UR22D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6334UR22D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:518
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Product details
Overview
The MAX6334UR22D3 from Maxim Integrated is an open-drain, 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 (±1.8% at +25°C, ±3% over –40°C to +125°C), maintains it for ≥100ms after VCC recovers, and operates down to VCC = 1.0V with 3.3µA typical supply current.
For engineers reviewing the MAX6334UR22D3 datasheet, MAX6334UR22D3 pinout, MAX6334UR22D3 application, or MAX6334UR22D3 equivalent, key selection criteria include its open-drain output for bidirectional μP reset interfaces, factory-trimmed 2.2V threshold, 100ms minimum timeout, ultra-low operating voltage support, and immunity to sub-24µs VCC transients.
Technical Context
The MAX6334UR22D3 implements a precision bandgap-based reset comparator with factory-trimmed 2.20V threshold and hysteresis optimized for brownout detection in low-voltage embedded systems. Its open-drain RESET output enables wired-OR configuration and direct interfacing with bidirectional microcontroller reset pins without level-shifting.
It features a dedicated reset timeout generator that guarantees ≥100ms assertion after VCC rises above VTH, independent of supply ramp rate, and includes transient immunity circuitry rejecting negative-going VCC glitches up to 24µs at 10V/ms slew rate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.20V ±1.8% at +25°C; ±3% over –40°C to +125°C - ensures accurate brownout detection for 2.2V nominal rails |
| Reset Timeout Period | ≥100ms - guarantees sufficient processor initialization time after power recovery |
| Supply Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and full-system voltage ranges |
| Supply Current | 3.3µA typical at VCC = 2.5V - enables battery-powered system longevity |
| RESET Output Type | Open-drain, active-low - allows pull-up to any logic rail and wired-OR with other reset sources |
| VCC Transient Immunity | Rejects ≤24µs negative transients at 10V/ms - prevents false resets from switching noise |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6334UR22D3 is housed in a RoHS-compliant 3-pin SOT23 package (outline 21-0051) with 0.95mm pitch, footprint-compatible with industry-standard supervisory ICs.
| 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 | Open-drain active-low reset output; requires external pull-up resistor (typically 10kΩ–100kΩ) to target logic rail |
| 3 | VCC | Power supply input; monitors system VCC for reset generation and powers internal circuitry down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.2V threshold | Enables precise reset activation for 2.2V logic rails without external resistors or calibration |
| 100ms minimum reset timeout | Guarantees full microcontroller boot sequence completion before release, even with slow VCC ramps |
| Open-drain RESET output | Supports multi-source reset arbitration and interface to bidirectional μP reset pins (e.g., Motorola 68HC11) |
| 1.0V minimum operating voltage | Ensures valid reset state assertion during severe brownout conditions where VCC drops near 1.0V |
| 3.3µA supply current at 2.5V | Minimizes quiescent power draw in always-on monitoring circuits for portable equipment |
Applications
| Industrial PLC Controllers | Portable Medical Devices |
|---|---|
Use Scenario: Microcontroller-based programmable logic controllers deployed in factory automation require deterministic reset behavior during line-voltage sags. IC Role / Device Role / Timing Role: Supervisory circuit generating a guaranteed ≥100ms active-low reset pulse upon VCC drop below 2.2V. Use Value: Prevents erratic I/O state transitions and firmware corruption during 100–200ms brownouts common in industrial power distribution. |
Use Scenario: Battery-powered glucose meters and infusion pumps must maintain safe shutdown and restart integrity across battery discharge cycles. IC Role / Device Role / Timing Role: Low-current (3.3µA) reset supervisor enabling >5-year shelf life while asserting reset at 2.2V battery threshold. Use Value: Eliminates need for external voltage dividers or regulators, reducing BOM count and PCB area in space-constrained handheld enclosures. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Under-hood ECUs experience wide temperature swings (–40°C to +125°C) and load-dump transients on 12V-derived 3.3V rails. IC Role / Device Role / Timing Role: Temperature-stable (±3%) reset generator immune to <24µs VCC glitches, packaged in rugged SOT23. Use Value: Ensures MCU reset validity across full automotive temperature range without derating or thermal compensation circuitry. |
Use Scenario: Revenue-grade electricity meters require tamper-resistant power-fail detection and secure boot sequencing during grid interruptions. IC Role / Device Role / Timing Role: Open-drain RESET output enables hardware-enforced reset coordination between metrology SoC and secure bootloader. Use Value: Allows shared reset bus with multiple security-critical ICs, preventing unauthorized firmware execution during partial power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UR22D3-T | Push/pull active-low RESET output; guaranteed operation down to VCC = 0.7V | Requires no external pull-up; unsuitable for wired-OR or bidirectional reset buses | Select when single-source reset assertion is required and board layout prohibits pull-up resistors |
| TPS3808G12DBVR | Adjustable reset threshold via external resistor divider; 350ms default timeout; higher 8µA ICC | Supports custom thresholds outside 1.6–2.5V range but adds component count and layout sensitivity | Select when nonstandard reset voltage (e.g., 1.25V) or longer timeout is needed, accepting higher quiescent current |
Compared with MAX6334UR22D3, MAX6327UR22D3 offers lower minimum operating voltage but lacks open-drain flexibility, while TPS3808G12DBVR provides threshold adjustability at the cost of added components and higher power - making MAX6334UR22D3 optimal for fixed 2.2V, space-constrained, multi-source reset designs.
Availability
MAX6334UR22D3 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical devices, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6334UR22D3 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 communications markets.
The MAX633x family delivers ultra-low-voltage, low-power microprocessor supervisory circuits targeting space-constrained, battery-sensitive, and high-reliability embedded systems requiring precise, glitch-immune reset generation.
FAQ
What is the exact reset threshold voltage of the MAX6334UR22D3?
The MAX6334UR22D3 has a factory-trimmed nominal reset threshold of 2.20V, with tolerance of ±1.8% at +25°C and ±3% over the full operating temperature range of –40°C to +125°C. This value is laser-trimmed during production and specified in Table 1 of the official datasheet; it applies directly to the MAX6334UR22D3 and not to other suffix variants.
Does the MAX6334UR22D3 support operation below 1.8V supply voltage?
Yes, the MAX6334UR22D3 is fully specified to operate down to VCC = 1.0V, with guaranteed correct reset assertion and deassertion behavior at that level. Its minimum operating voltage is 1.0V - unlike the MAX6332/MAX6333 variants which operate down to 0.7V - making it suitable for deep-brownout monitoring in 1.2V–1.8V subsystems.
Why does the MAX6334UR22D3 use an open-drain output instead of push-pull?
The MAX6334UR22D3 uses an open-drain RESET output to enable wired-OR reset bus configurations and direct interfacing with microcontrollers featuring bidirectional reset pins (e.g., Motorola 68HC11). This architecture allows multiple supervisors or processors to share a single reset line without contention, requiring only one external pull-up resistor per bus.
What is the guaranteed minimum reset timeout period for the MAX6334UR22D3?
The MAX6334UR22D3 guarantees a minimum reset timeout period of 100ms after VCC rises above the 2.20V threshold. This value is factory-programmed and tested; typical duration is 150ms, with maximum 200ms, ensuring robust microcontroller initialization across all process, voltage, and temperature corners.
Can the MAX6334UR22D3 replace the MAX809 in an existing design?
The MAX6334UR22D3 is pin-compatible with the MAX809 in the SOT23-3 package and shares identical pinout (VCC, GND, RESET), but differs in output structure: MAX809 uses push-pull while MAX6334UR22D3 is open-drain. A pull-up resistor must be added to the RESET line for functional equivalence, and timing parameters (e.g., 100ms vs. 240ms timeout) must be verified for system compatibility.
MAX6334UR22D3 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:
- 2.2V
- Output:
- Open Drain or Open Collector
- 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
MAX6334UR22D3 FAQ
1.How can I place an order for MAX6334UR22D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6334UR22D3 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 MAX6334UR22D3 reliable?
The price and inventory of MAX6334UR22D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6334UR22D3 is usually 5 days.
3.What payment methods are accepted for MAX6334UR22D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6334UR22D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6334UR22D3?
MAX6334UR22D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6334UR22D3 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 MAX6334UR22D3?
For technical support, including MAX6334UR22D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6334UR22D3 requirements.
6.How does Aetrix verify that MAX6334UR22D3 is sourced from the original manufacturer or authorized distributors?
All MAX6334UR22D3 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 MAX6334UR22D3 meets industry standards.
7.What is the process for return or replacement of MAX6334UR22D3?
All MAX6334UR22D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6334UR22D3, 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 MAX6334UR22D3 part is unused and in its original packaging.
Return procedure for MAX6334UR22D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6334UR22D3 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
Diodes Incorporated
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TPS3828-33DBVR
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V6340RSP3B+
EM Microelectronic
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EM6325CXSP5B-2.9+
EM Microelectronic
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MCP120T-300I/TT
Microchip Technology
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MCP130T-315I/TT
Microchip Technology
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MCP120T-475I/TT
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MCP111T-300E/TT
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MCP120T-315I/TT
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MCP809T-315I/TT
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