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Analog Devices Inc./Maxim Integrated MAX6335US20D3
- Part No.:
- MAX6335US20D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6335US20D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6335US20D3 from Maxim Integrated is an ultra-low-voltage microprocessor supervisory circuit with active-high push/pull RESET output, 2.00V factory-trimmed reset threshold, and 100ms minimum reset timeout period. It monitors 1.8V/2.5V power supplies in space-constrained embedded systems, asserts reset during brownout or manual reset, and guarantees valid RESET output down to VCC = 0.7V. Used in portable equipment and automotive controllers for reliable power-on initialization.
For engineers reviewing the MAX6335US20D3 datasheet, MAX6335US20D3 pinout, MAX6335US20D3 application, or MAX6335US20D3 equivalent, key selection criteria include its 2.00V reset threshold tolerance (±1.8% at +25°C), 3.3µA supply current at 1.8V, SOT143-4 package compatibility, and guaranteed operation across -40°C to +125°C.
Technical Context
The MAX6335US20D3 implements a precision bandgap-based reset comparator with factory-trimmed 2.00V threshold (±1.8% at +25°C, ±3% over full temperature range) and immunity to fast VCC transients-rejecting glitches up to 24µs at 10mV overdrive. Its internal debounced manual-reset input (MR) features a 20kΩ pull-up and requires only a momentary switch to GND.
It uses a push/pull output stage delivering VOH ≥ 0.8VCC at ISOURCE = 200µA (VCC ≥ 1.8V) and VOL ≤ 0.3V at ISINK = 500µA (VCC ≥ 1.8V), ensuring robust interfacing with high-impedance µP reset inputs without external pull-up resistors. The 100ms reset timeout is factory-programmed and stable over temperature (±10% typical variation).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.00V ±1.8% at +25°C; ensures accurate brownout detection for 1.8V systems |
| Reset Timeout Period | 100ms minimum; provides sufficient hold time for µP initialization sequences |
| Supply Voltage Range | 0.7V to 5.5V; enables operation during deep brownout and battery-depleted states |
| Supply Current | 3.3µA typical at VCC = 1.8V; minimizes quiescent power in always-on monitoring circuits |
| Operating Temperature | -40°C to +125°C; supports automotive under-hood and industrial control environments |
| Output Type | Active-high push/pull RESET; eliminates need for external pull-up resistor on µP reset pin |
| MR Input Threshold | 0.42V typical; compatible with standard logic-low assertion from switches or GPIO |
Pinout & Package
SOT143-4 package: 1.3mm × 1.3mm footprint, 0.95mm height, gull-wing leads, RoHS-compliant lead-free option available (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for all internal circuitry and RESET output sink current |
| 2 - RESET | Active-high reset output | Drives high during reset assertion (VCC < 2.00V or MR low); drives low after timeout |
| 3 - MR | Manual reset input | Logic-low assertion triggers reset; internal 20kΩ pull-up allows NC use |
| 4 - VCC | Power supply input | Supplies internal regulator and comparator; operates down to 0.7V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low operating voltage | Functional RESET assertion and deassertion guaranteed down to VCC = 0.7V |
| Factory-trimmed precision threshold | 2.00V ±1.8% at +25°C enables accurate 1.8V rail monitoring without calibration |
| Debounced manual reset | Internal filtering eliminates need for external RC network or firmware debounce |
| Transient-immune comparator | Rejects VCC glitches ≤24µs at 10mV overdrive, preventing false resets |
| Three timeout options | 100ms minimum pulse width ensures compatibility with slow-start µPs and peripherals |
Applications
| Battery-Powered IoT Sensors | Automotive Body Control Modules |
|---|---|
Use Scenario: Long-life sensor nodes powered by coin cells or energy harvesters experience gradual VCC droop during discharge. IC Role / Device Role / Timing Role: MAX6335US20D3 continuously monitors VCC and asserts active-high RESET before µC enters undefined state. Use Value: 0.7V operating limit and 3.3µA ICC extend usable battery life while guaranteeing clean restart at end-of-discharge. |
Use Scenario: Vehicle body electronics must survive load-dump and cold-crank conditions where 12V system dips to 6V and 5V rails sag below spec. IC Role / Device Role / Timing Role: MAX6335US20D3 supervises 1.8V microcontroller supply, asserting RESET during brownout and holding for 100ms post-recovery. Use Value: -40°C to +125°C rating and 2.00V threshold match automotive 1.8V logic rail tolerances under extreme ambient conditions. |
| Industrial Programmable Logic Controllers | Medical Handheld Diagnostics |
Use Scenario: PLC I/O modules operate in electrically noisy factory environments with frequent power interruptions and EFT bursts. IC Role / Device Role / Timing Role: MAX6335US20D3 provides glitch-immune power-on reset and manual reset via front-panel button. Use Value: 24µs transient rejection and debounced MR prevent spurious resets during EFT events, improving system uptime. |
Use Scenario: Portable diagnostic devices require fail-safe startup after battery insertion or low-power wake-up from sleep mode. IC Role / Device Role / Timing Role: MAX6335US20D3 generates a deterministic 100ms active-high RESET pulse to initialize ADCs, sensors, and display drivers. Use Value: Push/pull output drives high without pull-up, reducing BOM count and eliminating weak-drive risk on high-capacitance reset nets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811TEUS20D3-T | Same 2.00V threshold and 100ms timeout, but active-low open-drain RESET output | Requires external pull-up resistor; incompatible with µPs expecting active-high reset | Select when interfacing with bidirectional reset pins (e.g., Motorola 68HC11) or wired-OR reset buses |
| MAX6315US20D3-T | Identical 2.00V threshold and 100ms timeout, but push/pull active-low RESET output | Shares same pinout and electrical specs except RESET polarity; not drop-in for active-high designs | Choose only if redesigning reset logic to accommodate active-low assertion and verifying µP reset pin compatibility |
Compared with MAX811TEUS20D3-T and MAX6315US20D3-T, the MAX6335US20D3 uniquely delivers active-high push/pull RESET in the same SOT143-4 package-eliminating external components and simplifying interface to µPs with dedicated active-high reset inputs.
Availability
MAX6335US20D3 is available at Aetrix Electronics and suitable for battery-powered IoT sensors, automotive body control modules, and industrial programmable logic controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6335US20D3 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, sensing, and interface applications in industrial, automotive, and communications markets.
The MAX6335US20D3 belongs to Maxim's µP supervisory product line, engineered specifically for ultra-low-voltage, low-power reset monitoring in space-constrained embedded systems with demanding reliability requirements.
FAQ
What is the exact reset threshold voltage of the MAX6335US20D3?
The MAX6335US20D3 has a factory-trimmed reset threshold of 2.00V, with ±1.8% tolerance at +25°C and ±3% over the full -40°C to +125°C temperature range. This value is confirmed in Table 1 of the datasheet and applies specifically to the "US20" suffix variant. The threshold is set at production and does not require user calibration.
Does the MAX6335US20D3 require an external pull-up resistor on its RESET pin?
No, the MAX6335US20D3 does not require an external pull-up resistor because it features an active-high push/pull output stage. The RESET pin actively drives high during assertion and low during deassertion, enabling direct connection to µP reset inputs without additional components-unlike open-drain alternatives such as the MAX6337.
What is the minimum supply voltage at which the MAX6335US20D3 guarantees correct RESET output behavior?
The MAX6335US20D3 guarantees correct RESET output behavior down to VCC = 0.7V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This ultra-low operating voltage ensures reliable reset assertion even during severe brownout conditions in battery-powered systems.
How is the 100ms reset timeout period implemented in the MAX6335US20D3?
The 100ms minimum reset timeout period in the MAX6335US20D3 is factory-programmed and internally generated using a temperature-stable RC timing circuit. It begins counting when VCC rises above 2.00V or when MR returns high, and holds RESET asserted for ≥100ms regardless of subsequent VCC fluctuations within specification.
Is the MAX6335US20D3 pin-compatible with other Maxim supervisory ICs?
Yes, the MAX6335US20D3 is pin-compatible with the MAX811/MAX812 and MAX6314/MAX6315 families in the SOT143-4 package. Pin assignments (GND, RESET, MR, VCC) match exactly, allowing layout reuse-but designers must verify RESET polarity and timing compatibility, as MAX6315 outputs active-low RESET.
MAX6335US20D3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-4
MAX6335US20D3 FAQ
1.How can I place an order for MAX6335US20D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6335US20D3 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 MAX6335US20D3 reliable?
The price and inventory of MAX6335US20D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6335US20D3 is usually 5 days.
3.What payment methods are accepted for MAX6335US20D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6335US20D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6335US20D3?
MAX6335US20D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6335US20D3 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 MAX6335US20D3?
For technical support, including MAX6335US20D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6335US20D3 requirements.
6.How does Aetrix verify that MAX6335US20D3 is sourced from the original manufacturer or authorized distributors?
All MAX6335US20D3 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 MAX6335US20D3 meets industry standards.
7.What is the process for return or replacement of MAX6335US20D3?
All MAX6335US20D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6335US20D3, 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 MAX6335US20D3 part is unused and in its original packaging.
Return procedure for MAX6335US20D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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