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Analog Devices Inc./Maxim Integrated MAX6334UR17D3+T
- Part No.:
- MAX6334UR17D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6334UR17D3+T.pdf
- Description:
- IC MPU/RESET CIRC 1.70V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,022
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Product details
Overview
MAX6334UR17D3+T from Maxim Integrated is an ultra-low-voltage, open-drain microprocessor supervisory circuit in a 3-pin SOT23 package. It monitors 1.8V–3.3V power supplies, asserts an active-low RESET signal when VCC falls below 1.70V (±1.8% at +25°C), and maintains reset for ≥100ms after VCC recovers-enabling reliable power-on/brownout reset in portable battery-powered systems.
For engineers reviewing the MAX6334UR17D3+T datasheet, MAX6334UR17D3+T pinout, MAX6334UR17D3+T application, or MAX6334UR17D3+T equivalent, key selection criteria include guaranteed reset validity down to VCC = 1.0V, 3.3µA supply current at 1.8V, open-drain output compatibility with bidirectional µP reset pins, and factory-trimmed 1.7V threshold with ±3% tolerance over –40°C to +125°C.
Technical Context
The MAX6334UR17D3+T implements a precision bandgap-based voltage comparator with hysteresis and a temperature-compensated timeout timer. Its reset assertion logic is fully static: no internal oscillator or RC timing element-timeout is generated via a calibrated on-chip delay network.
As an open-drain device, it requires an external pull-up resistor and supports wired-OR reset bus configurations. The reset comparator rejects transients ≤24µs at 10V/ms slew rate and maintains functional reset state across its full operating range of –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.70V ±1.8% at +25°C; ±3% over –40°C to +125°C - ensures accurate brownout detection for 1.8V systems |
| Reset Timeout Period | ≥100ms - guarantees sufficient processor initialization time after power recovery |
| Supply Voltage Range | 1.0V to 5.5V - supports operation down to near-dead-battery conditions in portable equipment |
| Supply Current | 3.3µA typical at VCC = 1.8V - enables multi-year battery life in always-on monitoring applications |
| Output Type | Open-drain active-low RESET - allows shared reset bus and interface with bidirectional µP reset pins (e.g., Motorola 68HC11) |
| Reset Propagation Delay | 24µs max at 10V/ms VCC fall rate - provides immunity to short power glitches without false triggering |
| Operating Temperature | –40°C to +125°C - qualified for industrial and extended-temperature embedded control environments |
Pinout & Package
MAX6334UR17D3+T is housed in a RoHS-compliant, lead-free 3-pin SOT23 package (outline 21-0051) with 0.95mm pitch and standard land pattern 90-0179.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and reset timer; must be low-impedance connection to system ground plane |
| 2 | RESET | Open-drain active-low output; requires external pull-up resistor (typically 10kΩ–100kΩ) to VCC or another logic rail |
| 3 | VCC | Power supply input; powers internal circuitry and defines reset threshold reference; accepts 1.0V–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.7V reset threshold | Eliminates external resistor divider and calibration effort; reduces BOM count and layout area in space-constrained designs |
| 100ms minimum reset timeout | Ensures full µP/µC boot sequence completion before release-even under slow-rising VCC conditions |
| 3.3µA supply current at 1.8V | Enables integration into energy-harvesting and coin-cell-powered devices without compromising runtime |
| Open-drain output architecture | Permits direct connection to bidirectional reset pins and supports multiple supervisors on a single reset bus |
| Transient immunity up to 24µs | Rejects common switching noise and ESD-induced supply dips without requiring additional filtering components |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters require reliable reset during cold-start and low-battery conditions. IC Role / Device Role / Timing Role: Supervises 1.8V LDO output and asserts RESET until stable; holds reset ≥100ms to allow ADC and RF subsystem initialization. Use Value: Guarantees valid reset down to VCC = 1.0V and draws only 3.3µA-extending single-CR2032 battery life beyond 3 years in standby. |
Use Scenario: DIN-rail mounted PLC modules operate in harsh industrial environments with wide ambient temperature swings and noisy 24V DC rails. IC Role / Device Role / Timing Role: Monitors local 3.3V logic supply derived from 24V; detects brownouts caused by motor startup transients and initiates controlled µC reboot. Use Value: ±3% reset threshold tolerance over –40°C to +125°C and 24µs glitch immunity prevent spurious resets in electrically noisy factory settings. |
| Smart Meter Communication Units | Automotive Body Control Modules |
Use Scenario: NB-IoT-enabled electricity meters transmit data intermittently and spend >99% of time in ultra-low-power sleep mode. IC Role / Device Role / Timing Role: Provides power-on reset and brownout protection for the communication SoC; open-drain output interfaces directly with SoC's bidirectional reset pin. Use Value: Open-drain architecture eliminates level-shifting components; 100ms timeout aligns with modem firmware boot requirements. |
Use Scenario: Door module ECUs powered from vehicle battery (9V–16V) with internal 3.3V regulator must survive load-dump and cold-crank events. IC Role / Device Role / Timing Role: Supervises 3.3V domain and asserts RESET during VCC dip below 1.70V; timeout ensures MCU completes safe shutdown before power collapse. Use Value: Valid operation down to VCC = 1.0V prevents premature reset release during cold-crank (battery sag to ~6V → 3.3V rail drop to ~1.2V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UT23D3+T | Push/pull active-low RESET; 2.3V threshold; same 100ms timeout; operates down to 0.7V | Requires no pull-up resistor but cannot share reset bus; less suitable for bidirectional µP interfaces | Select when board-level reset isolation is preferred and VCC may fall below 1.0V |
| TPS3123E18DBVR | Open-drain active-low RESET; 1.84V threshold; 200ms timeout; 1.6V–6.0V VCC range; 1.6µA ICC | Lower quiescent current but wider threshold tolerance (±2.5%); not qualified to +125°C | Select for ultra-low-power designs where extended temperature range is not required |
Compared with MAX6334UR17D3+T, MAX6327UT23D3+T offers lower minimum VCC (0.7V) but lacks bus-sharing capability, while TPS3123E18DBVR delivers lower ICC and longer timeout but sacrifices automotive-grade temperature support and tighter threshold accuracy.
Availability
MAX6334UR17D3+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter communication units, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6334UR17D3+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) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing applications.
The MAX633x family delivers ultra-low-voltage, low-quiescent-current supervisory circuits optimized for battery-powered and energy-constrained embedded systems requiring high reliability and minimal external components.
FAQ
What is the exact reset threshold voltage of MAX6334UR17D3+T at room temperature?
The MAX6334UR17D3+T has a factory-trimmed reset threshold of 1.70V with ±1.8% tolerance at +25°C, corresponding to the "UR17" suffix per Table 1 in the datasheet. This value is measured under no-load conditions and remains within ±3% across the full –40°C to +125°C operating range.
Does MAX6334UR17D3+T require an external pull-up resistor on the RESET pin?
Yes, MAX6334UR17D3+T features an open-drain active-low RESET output and requires an external pull-up resistor-typically 10kΩ to 100kΩ-to VCC or another logic rail. Without this resistor, the RESET signal cannot transition high and will remain indeterminate, preventing proper microprocessor release.
Can MAX6334UR17D3+T operate reliably when VCC drops below 1.0V?
No-MAX6334UR17D3+T is only guaranteed to maintain correct reset state down to VCC = 1.0V. Below this voltage, the internal circuitry may become nonfunctional and RESET behavior is undefined. For sub-1.0V operation, consider MAX6332/MAX6333 variants, which guarantee functionality to 0.7V.
What is the minimum reset timeout period specified for MAX6334UR17D3+T?
The "D3" suffix in MAX6334UR17D3+T denotes a nominal reset timeout period of 100ms, with a guaranteed minimum of 100ms across temperature and voltage. Typical timeout is 150ms, and maximum is 200ms, as confirmed in the Electrical Characteristics table under parameter tRP.
Is MAX6334UR17D3+T pin-compatible with legacy Maxim supervisors like MAX809?
Yes-MAX6334UR17D3+T is explicitly stated as pin-compatible with MAX809/MAX810 and MAX6326/MAX6327/MAX6328 in the Benefits and Features section. All share identical SOT23-3 pinout (GND, RESET, VCC), enabling drop-in replacement in existing layouts without PCB modification.
MAX6334UR17D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.7V
- 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
MAX6334UR17D3+T FAQ
1.How can I place an order for MAX6334UR17D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6334UR17D3+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 MAX6334UR17D3+T reliable?
The price and inventory of MAX6334UR17D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6334UR17D3+T is usually 5 days.
3.What payment methods are accepted for MAX6334UR17D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6334UR17D3+T transactions.
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4.How is shipping managed for MAX6334UR17D3+T?
MAX6334UR17D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6334UR17D3+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 MAX6334UR17D3+T?
For technical support, including MAX6334UR17D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6334UR17D3+T requirements.
6.How does Aetrix verify that MAX6334UR17D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6334UR17D3+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 MAX6334UR17D3+T meets industry standards.
7.What is the process for return or replacement of MAX6334UR17D3+T?
All MAX6334UR17D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6334UR17D3+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 MAX6334UR17D3+T part is unused and in its original packaging.
Return procedure for MAX6334UR17D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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