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Analog Devices Inc./Maxim Integrated MAX6804US29D2-T
- Part No.:
- MAX6804US29D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6804US29D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
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Product details
Overview
MAX6804US29D2-T from Maxim Integrated is a push/pull, active-low microprocessor supervisory circuit designed for power supply monitoring in 2.85V–5.0V digital systems. It asserts reset when VCC falls below 2.93V or upon manual reset assertion, with a guaranteed minimum 20ms timeout and valid RESET output down to VCC = 0.7V. Used in automotive ECUs and portable instrumentation for brownout protection.
For engineers reviewing the MAX6804US29D2-T datasheet, MAX6804US29D2-T pinout, MAX6804US29D2-T application, or MAX6804US29D2-T equivalent, this device delivers precision voltage supervision with ultra-low 4.0µA supply current, factory-trimmed 2.93V threshold, and SOT143 space-saving packaging - critical for battery-powered and high-reliability embedded designs.
Technical Context
The MAX6804US29D2-T implements a precision bandgap-based reset comparator with ±1.8% threshold accuracy at +25°C and ±3% over –40°C to +125°C. Its internal 20kΩ MR pullup eliminates external components, and the reset timeout is factory-set to 20ms (min), ensuring reliable power-on sequencing across temperature.
It features push/pull active-low RESET output with VOL ≤ 0.4V at ISINK = 3.2mA (VCC ≥ 4.25V) and VOH ≥ 0.8×VCC at ISOURCE = 800µA, enabling direct interface to CMOS inputs without external pullups. Reset propagation delay is <30µs for VCC falling at 10V/ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±3% over –40°C to +125°C - ensures stable brownout detection across automotive and industrial temperature ranges |
| Reset Timeout Period | 20ms minimum - guarantees sufficient hold time for µP initialization before release |
| Supply Voltage Range | 0.7V to 5.5V - supports operation during deep brownout and full-system power-up |
| Supply Current | 5µA typical at +5.0V - enables multi-year battery life in portable equipment |
| MR Input Glitch Immunity | 50ns - rejects noise spikes on manual reset line without external filtering |
| RESET Output Type | Push/pull active-low - drives CMOS inputs directly; no external pullup required |
| VCC Transient Immunity | Rejects <30µs negative transients at 100mV overdrive - prevents false resets during switching noise |
Pinout & Package
MAX6804US29D2-T is housed in a 4-pin SOT143 package (3.0mm × 1.5mm × 1.0mm height), optimized for space-constrained PCB layouts. The package is lead-free compatible (RoHS-compliant) and tape-and-reel supplied.
| 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 up to 3.2mA; holds low for 20ms after VCC recovery or MR release |
| 3 | MR | Manual reset input; logic-low assertion forces reset; internal 20kΩ pullup allows NC if unused |
| 4 | VCC | Power supply input; monitors voltage level and powers internal circuitry; functional down to 0.7V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.93V threshold | Eliminates external resistor networks and calibration; meets tight tolerance requirements for 3.3V system rails |
| 20ms min reset timeout | Guarantees µP core and peripherals fully stabilize before release - avoids race conditions in boot sequence |
| 0.7V operating supply minimum | Ensures RESET remains valid during deep brownout events where VCC collapses below 1.0V |
| Debounced MR input | Internal filtering removes switch bounce; no external RC network needed for pushbutton reset implementation |
| 4-Pin SOT143 footprint | Reduces board area by >50% vs. SO-8 alternatives; compatible with high-density automated assembly |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Instrumentation |
|---|---|
Use Scenario: Power rail monitoring during cold-cranking, where battery voltage dips to 6V–8V with high ripple. IC Role / Device Role / Timing Role: Supervises 3.3V microcontroller supply; asserts reset until VCC stabilizes above 2.93V and holds for ≥20ms. Use Value: Prevents ECU firmware corruption during engine start; leverages 0.7V operation to maintain reset validity even as VCC recovers from deep sag. |
Use Scenario: Battery-powered handheld glucose meter requiring multi-year shelf life and instant-on reliability. IC Role / Device Role / Timing Role: Monitors main Li-ion cell output (3.0V–4.2V); triggers controlled shutdown and restart on voltage drop below 2.93V. Use Value: 4.0µA quiescent current extends battery runtime; 20ms timeout ensures ADC and display controllers fully initialize before release. |
| Industrial PLC I/O Module | Smart Energy Meter |
Use Scenario: Operation in unregulated 24V DC field wiring with frequent transients and load-dump spikes. IC Role / Device Role / Timing Role: Guards isolated 3.3V µC supply; rejects <30µs VCC glitches via comparator overdrive immunity. Use Value: Eliminates need for external TVS + RC filter; maintains system uptime in electrically noisy factory environments. |
Use Scenario: Revenue-grade meter operating continuously for 15+ years with strict firmware integrity requirements. IC Role / Device Role / Timing Role: Provides fail-safe reset during AC/DC converter brownout or capacitor aging-induced droop. Use Value: Factory-trimmed 2.93V threshold ensures consistent trip point across lifetime; SOT143 package supports conformal coating and long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US29D2-T | Same 2.93V threshold and 20ms timeout, but includes watchdog timer function | Required where µP firmware hang detection is needed alongside power monitoring | Select MAX6314US29D2-T only if watchdog capability is mandatory; adds complexity and cost |
| TLV803EB29DBZR | 2.93V threshold, 20ms timeout, but operates down to 0.9V (not 0.7V); 5.5µA ICC | Suitable for less demanding industrial applications where deep brownout coverage is not critical | Choose TLV803EB29DBZR for cost-sensitive designs with standard 1.0V+ brownout margins |
Compared with MAX6804US29D2-T, MAX6314US29D2-T adds watchdog functionality at higher BOM cost and layout overhead, while TLV803EB29DBZR trades 0.2V lower operating voltage margin for TI's broader distribution and shorter lead times.
Availability
MAX6804US29D2-T is available at Aetrix Electronics and suitable for automotive ECUs, portable medical devices, and industrial PLC modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6804US29D2-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The MAX6803/MAX6804/MAX6805 family delivers ultra-low-power, precision voltage supervision for microprocessor systems - engineered for reliability in harsh environments and minimal board space.
FAQ
What is the exact reset threshold voltage of MAX6804US29D2-T?
The MAX6804US29D2-T has a factory-trimmed reset threshold of 2.93V, with ±1.8% accuracy at +25°C and ±3% over the full –40°C to +125°C operating range. This value is confirmed in Table 1 of the datasheet and applies specifically to the "29" suffix variant of the MAX6804USxxD2-T series.
Does MAX6804US29D2-T require external components for basic operation?
No, MAX6804US29D2-T requires no external components for core supervision functionality. Its MR input includes an internal 20kΩ pullup resistor, and the push/pull RESET output drives CMOS loads directly. Only a bypass capacitor on VCC is recommended per layout guidelines - no resistors, capacitors, or diodes are needed for reset assertion or timing.
What is the minimum supply voltage at which MAX6804US29D2-T guarantees valid RESET output?
MAX6804US29D2-T guarantees valid RESET output down to VCC = 0.7V, as explicitly stated in the General Description and Absolute Maximum Ratings sections. This ensures the reset signal remains asserted and logically defined during severe brownout conditions where many competing supervisors cease operation.
How does the 20ms reset timeout of MAX6804US29D2-T behave across temperature?
The 20ms minimum timeout of MAX6804US29D2-T is specified over –40°C to +125°C. Typical Operating Characteristics show normalized timeout variation remains within ±25% across temperature, meaning actual timeout stays between ~15ms and ~25ms - well above the 20ms minimum guarantee required for safe µP initialization.
Is MAX6804US29D2-T pin-compatible with other Maxim reset ICs?
Yes, MAX6804US29D2-T is pin-compatible with MAX811/MAX812 and MAX6314/MAX6315 in the same SOT143 package. Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC - identical mapping enables drop-in replacement where the 2.93V threshold and 20ms timeout meet system requirements.
MAX6804US29D2-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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-4
MAX6804US29D2-T FAQ
1.How can I place an order for MAX6804US29D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6804US29D2-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 MAX6804US29D2-T reliable?
The price and inventory of MAX6804US29D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6804US29D2-T is usually 5 days.
3.What payment methods are accepted for MAX6804US29D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6804US29D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6804US29D2-T?
MAX6804US29D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6804US29D2-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 MAX6804US29D2-T?
For technical support, including MAX6804US29D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6804US29D2-T requirements.
6.How does Aetrix verify that MAX6804US29D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6804US29D2-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 MAX6804US29D2-T meets industry standards.
7.What is the process for return or replacement of MAX6804US29D2-T?
All MAX6804US29D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6804US29D2-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 MAX6804US29D2-T part is unused and in its original packaging.
Return procedure for MAX6804US29D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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