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Analog Devices Inc./Maxim Integrated MAX6804US29D3-T
- Part No.:
- MAX6804US29D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6804US29D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:54,600
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Product details
Overview
MAX6804US29D3-T from Maxim Integrated is a 4-pin SOT143 push/pull active-low microprocessor supervisory circuit with factory-trimmed 2.93V reset threshold, 100ms minimum reset timeout, and guaranteed operation down to VCC = 0.7V. It monitors power supplies in 2.85V–5.0V digital systems, features debounced manual-reset input, and delivers ultra-low 4µA supply current for battery-powered applications.
For engineers reviewing the MAX6804US29D3-T datasheet, MAX6804US29D3-T pinout, MAX6804US29D3-T application, or MAX6804US29D3-T equivalent, key selection criteria include reset threshold accuracy (±1.8% at +25°C), VCC falling propagation delay (30µs), MR glitch immunity (50ns), RESET output low voltage (0.4V at ISINK = 50µA), and compatibility with space-constrained embedded control and portable instrumentation designs.
Technical Context
The MAX6804US29D3-T implements a precision bandgap-based reset comparator with factory-trimmed 2.93V threshold and ±3% tolerance over –40°C to +125°C. Its internal 20kΩ MR pullup resistor enables direct connection of a momentary switch to GND without external debounce components.
Reset assertion is triggered by VCC falling below 2.93V or MR logic-low input, and remains active for ≥100ms after VCC rises above threshold or MR deasserts. The push/pull RESET output drives low with VOL ≤ 0.4V at 50µA sink current and maintains valid state down to VCC = 0.7V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.8% at +25°C; ensures reliable brownout detection for 3.3V systems |
| Reset Timeout Period | 100ms min; guarantees sufficient processor initialization time after power recovery |
| Supply Current | 4µA typical at VCC = +3.0V; enables multi-year battery life in portable equipment |
| VCC Operating Range | 0.7V to 5.5V; supports full functionality during deep brownout conditions |
| MR Glitch Immunity | 50ns; rejects noise spikes on manual-reset line without external filtering |
| RESET Output Type | Active-low push/pull; eliminates need for external pullup resistor in most µP interfaces |
| VCC Falling Propagation Delay | 30µs at 10V/ms; provides fast response to rapid supply collapse |
Pinout & Package
MAX6804US29D3-T is housed in a 4-pin SOT143 package (U4-1 outline, land pattern 90-0183), measuring 2.9mm × 1.6mm × 1.1mm, optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and reset comparator |
| 2 | RESET | Active-low push/pull output; sinks current when asserted, high-impedance when inactive |
| 3 | MR | Manual-reset input with internal 20kΩ pullup; logic-low assertion triggers reset |
| 4 | VCC | Primary power supply input; monitored for voltage drop below 2.93V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.93V with ±1.8% accuracy at +25°C enables precise 3.3V system monitoring without calibration |
| 100ms minimum reset timeout | Guarantees µP reset pulse width exceeds boot-time requirements of ARM Cortex-M0/M3 and PIC16/18 families |
| 0.7V minimum operating voltage | Maintains valid RESET output state during severe brownout, preventing spurious release before stable power recovery |
| Debounced MR input | Internal 20kΩ pullup and 50ns glitch immunity eliminate need for RC filters or firmware debouncing |
| No external components required | Reduces BOM count and PCB area vs. discrete reset solutions; supports single-chip supervision in wearables and sensors |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: PLC I/O modules requiring fail-safe restart after AC mains interruption or DC bus sag. IC Role / Device Role / Timing Role: Monitors 3.3V logic rail and asserts active-low RESET to ARM-based controller until stable power resumes. Use Value: 100ms timeout prevents premature boot during transient dips; 2.93V threshold aligns with 3.3V ±5% supply spec. | Use Scenario: Handheld glucose meters powered by single-cell Li-ion batteries discharging from 4.2V to 3.0V. IC Role / Device Role / Timing Role: Supervises main 3.3V LDO output and initiates controlled shutdown when battery reaches end-of-life voltage. Use Value: 4µA quiescent current extends battery runtime; 0.7V operation ensures reset validity through final discharge phase. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: DIN-rail mounted electricity meters exposed to wide temperature swings (–40°C to +85°C) and EMI-rich environments. IC Role / Device Role / Timing Role: Provides power-on reset and brownout protection for dual-core metering SoC with separate 1.2V/3.3V rails. Use Value: ±3% threshold tolerance over full temperature range ensures consistent trip point; 30µs propagation delay captures fast transients. | Use Scenario: Door module ECUs powered from vehicle battery (9V–16V) with local 3.3V regulator subject to load-dump and cold-crank events. IC Role / Device Role / Timing Role: Resets microcontroller during cold-crank (battery dip to 6V) and post-load-dump recovery. Use Value: Valid operation down to 0.7V allows reset assertion even during extreme undervoltage; SOT143 footprint fits tight connector zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811TEUS29D3-T | Same 2.93V threshold and 100ms timeout, but higher 15µA supply current and no MR input | Lacks manual-reset capability; suitable only for power-only supervision | Select when MR function is unnecessary and cost is primary driver |
| TPS3808G33DBVR | 2.93V threshold, 200ms timeout, 1.1µA supply current, but requires external pullup for open-drain RESET | Open-drain output demands external resistor; lower ICC benefits ultra-low-power designs | Choose for battery lifetime-critical applications where 200ms timeout is acceptable |
Compared with MAX811TEUS29D3-T, the MAX6804US29D3-T adds MR functionality and cuts supply current by 73%; versus TPS3808G33DBVR, it eliminates external pullup components and reduces timeout uncertainty, simplifying layout and timing validation.
Availability
MAX6804US29D3-T is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, smart energy meters, and automotive body control modules requiring stable component supply across extended temperature ranges.
Supply support for MAX6804US29D3-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, and computing applications.
The MAX680x series targets space-constrained embedded systems needing reliable, low-power µP supervision with factory-trimmed thresholds and integrated manual reset - eliminating external components in portable and harsh-environment electronics.
FAQ
What is the exact reset threshold voltage of the MAX6804US29D3-T?
The MAX6804US29D3-T has a factory-trimmed reset threshold of 2.93V with ±1.8% tolerance at +25°C and ±3% over –40°C to +125°C. This value is permanently programmed during manufacturing and corresponds to the "29" suffix in the part number per Table 1 of the datasheet. The threshold is designed to reliably monitor standard 3.3V power rails while accommodating typical supply tolerances.
Does the MAX6804US29D3-T require external components for basic operation?
No, the MAX6804US29D3-T operates autonomously with no external components required. Its internal 20kΩ MR pullup resistor enables direct switch-to-GND connection, and the push/pull RESET output eliminates the need for an external pullup. Only VCC decoupling (recommended 0.1µF ceramic) is advised for noise immunity - making the MAX6804US29D3-T a true single-component solution for µP supervision.
What is the minimum supply voltage at which the MAX6804US29D3-T guarantees valid RESET output?
The MAX6804US29D3-T guarantees correct RESET output state down to VCC = 0.7V across the full –40°C to +125°C temperature range. This is confirmed in the Electrical Characteristics table under "Supply Voltage Range" for MAX6804, and enables robust brownout detection in deeply discharged battery scenarios where other supervisors may release reset prematurely.
How does the manual-reset (MR) input behave on the MAX6804US29D3-T?
The MR input on the MAX6804US29D3-T is active-low with internal 20kΩ pullup. A logic-low pulse ≥1µs asserts RESET, which remains active for the full 100ms timeout period after MR returns high. Its 50ns glitch immunity rejects noise without external filtering, and leaving MR unconnected defaults to high - making it field-configurable for reset-on-demand or always-enabled operation.
What package type and dimensions does the MAX6804US29D3-T use?
The MAX6804US29D3-T uses a 4-pin SOT143 package (outline U4-1, land pattern 90-0183), measuring 2.9mm × 1.6mm × 1.1mm. This ultra-small footprint supports high-density PCB layouts in portable and space-constrained applications, and is compatible with standard SMT reflow processes. Top marking "KACP" identifies the MAX6804US29D3-T variant per the Selector Guide.
MAX6804US29D3-T 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:
- 2.93V
- 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-23-4
MAX6804US29D3-T FAQ
1.How can I place an order for MAX6804US29D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6804US29D3-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 MAX6804US29D3-T reliable?
The price and inventory of MAX6804US29D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6804US29D3-T is usually 5 days.
3.What payment methods are accepted for MAX6804US29D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6804US29D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6804US29D3-T?
MAX6804US29D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6804US29D3-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 MAX6804US29D3-T?
For technical support, including MAX6804US29D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6804US29D3-T requirements.
6.How does Aetrix verify that MAX6804US29D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6804US29D3-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 MAX6804US29D3-T meets industry standards.
7.What is the process for return or replacement of MAX6804US29D3-T?
All MAX6804US29D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6804US29D3-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 MAX6804US29D3-T part is unused and in its original packaging.
Return procedure for MAX6804US29D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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