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Analog Devices Inc./Maxim Integrated MAX6804US30D1+T
- Part No.:
- MAX6804US30D1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6804US30D1+T.pdf
- Description:
- IC RESET MPU LOW PWR SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,771
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Product details
Overview
MAX6804US30D1+T from Maxim Integrated is a 4-pin SOT143 push/pull active-low microprocessor supervisory circuit designed for precise power supply monitoring in embedded systems. It asserts reset when VCC drops below 3.00V (±3% over temperature), maintains reset for ≥1ms after recovery, and operates down to 0.7V supply voltage with only 4µA quiescent current - ideal for battery-powered controllers and portable instrumentation.
For engineers reviewing the MAX6804US30D1+T datasheet, MAX6804US30D1+T pinout, MAX6804US30D1+T application, or MAX6804US30D1+T equivalent, key selection criteria include its factory-trimmed 3.00V reset threshold, guaranteed 1ms minimum timeout, push/pull active-low RESET output, ultra-low operating voltage support (0.7V), and compatibility with space-constrained PCB layouts requiring SOT143 footprint.
Technical Context
The MAX6804US30D1+T implements a precision bandgap-based reset comparator with ±3% threshold tolerance over –40°C to +125°C and immunity to fast VCC transients (e.g., <30µs at 10V/ms). Its internal 20kΩ MR pullup eliminates external components, and reset assertion is synchronized to both power-fail detection and debounced manual reset input.
This device uses BiCMOS process technology (505 transistors) to achieve stable operation across full industrial temperature range while maintaining sub-10µA supply current at 3.0V. The push/pull output drives CMOS inputs directly without external pullup, supporting reliable µP reset signaling even during brownout recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V ±3% over –40°C to +125°C - ensures deterministic reset initiation at defined supply sag level |
| Reset Timeout Period | 1ms minimum - guarantees sufficient hold time for µP initialization before release |
| Supply Voltage Range | 0.7V to 5.5V - enables valid reset assertion during deep brownout and supports wide-input systems |
| Quiescent Current | 4µA at VCC = 3.0V - minimizes battery drain in always-on monitoring applications |
| MR Input Logic | Active-low with 20kΩ internal pullup - simplifies manual reset interface with momentary switch to GND |
| RESET Output Type | Push/pull active-low - eliminates need for external pullup resistor and ensures fast, rail-to-rail logic transitions |
| VCC Transient Immunity | Rejects <30µs negative glitches at 10V/ms - prevents false resets from switching noise or ESD coupling |
Pinout & Package
MAX6804US30D1+T is housed in a lead-free 4-pin SOT143 package (outline 21-0052, land pattern 90-0183), optimized for high-density PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and reset comparator; must be low-impedance connection |
| 2 | RESET | Active-low push/pull output; drives low during reset assertion and high-impedance state is not used |
| 3 | MR | Manual-reset input; logic low asserts reset; internally pulled up to VCC via 20kΩ resistor |
| 4 | VCC | Primary power supply input; monitored for reset threshold violation and powers internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.00V with ±1.8% typical accuracy at +25°C and ±3% over full temperature range |
| Ultra-low operating voltage | Guaranteed functional reset assertion down to VCC = 0.7V, critical for low-power brownout recovery |
| Debounced manual reset | No external RC network required - internal filtering rejects <1µs MR glitches |
| Transient-immune comparator | Rejects VCC dips ≤30µs duration at 10V/ms slew rate, preventing false resets in noisy environments |
| Zero external components | Integrates pullup resistor, precision reference, and timing capacitor - reduces BOM count and layout area |
Applications
| Industrial Controllers | Portable Medical Instruments |
|---|---|
|
Use Scenario: PLC I/O modules powered by 3.3V rails subject to intermittent brownouts during field deployment. IC Role / Device Role / Timing Role: Monitors VCC and asserts active-low RESET to halt processor execution until stable supply returns. Use Value: Prevents corrupted firmware writes and erratic peripheral behavior during 3.0V–3.3V supply sags with guaranteed 1ms hold time. |
Use Scenario: Handheld glucose meters using coin-cell batteries where supply voltage decays gradually from 3.0V to 2.2V. IC Role / Device Role / Timing Role: Detects crossing of 3.00V threshold and forces controlled shutdown before data loss occurs. Use Value: Enables safe memory save and display blanking at precisely 3.00V, extending usable battery life without risking data corruption. |
| Automotive Body Control Modules | Smart Energy Meters |
|
Use Scenario: 12V-to-3.3V converted supply in BCM experiencing load-dump transients and cold-crank voltage dips. IC Role / Device Role / Timing Role: Provides glitch-immune reset supervision independent of main µP's internal reset circuitry. Use Value: Rejects <30µs transients while asserting reset on sustained dips below 3.00V, ensuring deterministic boot sequence. |
Use Scenario: Revenue-grade meter with isolated µP requiring fail-safe reset during AC line interruptions affecting auxiliary DC supply. IC Role / Device Role / Timing Role: Acts as primary brownout detector with 1ms timeout, coordinating secure shutdown of metrology and communication subsystems. Use Value: Guarantees EEPROM write completion and RTC preservation before power collapse, meeting IEC 62053-21 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811SEUS30+T | Same 3.00V threshold and 1ms timeout, but higher 15µA supply current and no MR input | Lacks manual reset capability; suitable only for power-only monitoring without operator intervention | Select when MR functionality is unnecessary and cost sensitivity outweighs current savings |
| TPS3801K30DBVR | 3.00V threshold with 200ms timeout (fixed), 1.6µA current, and no MR input | Longer timeout limits use in fast-boot systems; lower current benefits ultra-low-power designs | Prefer for energy-harvesting or battery-life-critical applications where extended reset hold is acceptable |
Compared with MAX811SEUS30+T and TPS3801K30DBVR, the MAX6804US30D1+T uniquely combines ultra-low 4µA current, factory-trimmed 3.00V threshold, 1ms timeout, and integrated debounced MR input - making it optimal for compact, manually serviceable, and battery-sensitive embedded controllers.
Availability
MAX6804US30D1+T is available at Aetrix Electronics and suitable for industrial controllers, portable medical instruments, automotive body control modules, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for MAX6804US30D1+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 and mixed-signal ICs for demanding industrial, automotive, and computing applications, emphasizing reliability, low power, and integration.
The MAX6803/MAX6804/MAX6805 family delivers highly accurate, low-voltage microprocessor supervisory circuits targeting space-constrained and battery-operated systems needing robust brownout protection.
FAQ
What is the exact reset threshold voltage of MAX6804US30D1+T and how tightly is it specified?
The MAX6804US30D1+T has a factory-trimmed nominal reset threshold of 3.00V, with ±1.8% tolerance at +25°C and ±3% over the full –40°C to +125°C operating temperature range. This specification ensures predictable brownout detection across environmental extremes without calibration, and is confirmed in Table 1 and Electrical Characteristics section of the official datasheet.
Does MAX6804US30D1+T require external components to function as a reset supervisor?
No, the MAX6804US30D1+T requires zero external components: it integrates a 20kΩ internal pullup on the MR pin, precision bandgap reference, reset timing circuitry, and push/pull output driver. This eliminates external resistors, capacitors, or diodes - reducing BOM cost and PCB area while improving reliability compared to discrete reset solutions.
What is the minimum supply voltage at which MAX6804US30D1+T guarantees correct reset output behavior?
The MAX6804US30D1+T guarantees valid RESET output down to VCC = 0.7V across the full –40°C to +125°C temperature range. This is explicitly stated in the General Description and Electrical Characteristics tables, enabling reliable reset assertion during deep brownout conditions where other supervisors may fail.
How does the manual-reset (MR) input of MAX6804US30D1+T behave, and what is its debounce capability?
The MR input of MAX6804US30D1+T is active-low with an internal 20kΩ pullup to VCC, allowing direct connection of a momentary switch to GND. It features built-in glitch rejection: pulses shorter than 1µs are ignored, and the MR reset delay is 0.1µs - eliminating need for external RC filters while ensuring clean, bounce-free reset initiation.
What package type and RoHS status does MAX6804US30D1+T use, and is it compatible with standard SOT143 footprints?
The MAX6804US30D1+T uses a lead-free 4-pin SOT143 package (outline 21-0052, land pattern 90-0183), fully compatible with industry-standard SOT143 footprints. The "+T" suffix confirms RoHS-compliant, lead-free construction per JEDEC standards, and the package supports standard reflow soldering profiles without modification.
MAX6804US30D1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6804US30D1+T FAQ
1.How can I place an order for MAX6804US30D1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6804US30D1+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 MAX6804US30D1+T reliable?
The price and inventory of MAX6804US30D1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6804US30D1+T is usually 5 days.
3.What payment methods are accepted for MAX6804US30D1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6804US30D1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6804US30D1+T?
MAX6804US30D1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6804US30D1+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 MAX6804US30D1+T?
For technical support, including MAX6804US30D1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6804US30D1+T requirements.
6.How does Aetrix verify that MAX6804US30D1+T is sourced from the original manufacturer or authorized distributors?
All MAX6804US30D1+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 MAX6804US30D1+T meets industry standards.
7.What is the process for return or replacement of MAX6804US30D1+T?
All MAX6804US30D1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6804US30D1+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 MAX6804US30D1+T part is unused and in its original packaging.
Return procedure for MAX6804US30D1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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