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Analog Devices Inc./Maxim Integrated MAX6803US29D3+T
- Part No.:
- MAX6803US29D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6803US29D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,973
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Product details
Overview
MAX6803US29D3+T from Maxim Integrated is a push/pull, active-high microprocessor supervisory circuit designed for precise 2.93V power-supply monitoring in embedded systems. It asserts RESET when VCC falls below 2.93V or MR is pulled low, maintains reset for ≥100ms after recovery, and operates down to 0.7V supply voltage with only 4µA quiescent current-ideal for battery-powered instrumentation and industrial controllers.
For engineers reviewing the MAX6803US29D3+T datasheet, MAX6803US29D3+T pinout, MAX6803US29D3+T application, or MAX6803US29D3+T equivalent, key selection criteria include its factory-trimmed 2.93V threshold, guaranteed 100ms minimum reset timeout, active-high push/pull output, SOT143 package compatibility, and operation over –40°C to +125°C.
Technical Context
The MAX6803US29D3+T integrates a precision bandgap-based reset comparator with ±1.8% threshold accuracy at +25°C and ±3% over full temperature range, coupled with a temperature-stable internal timer generating a fixed ≥100ms reset assertion period. Its MR input includes internal 20kΩ pullup and 50ns glitch immunity, enabling direct switch connection without external debounce.
Reset propagation delay is ≤30µs for VCC falling at 10V/ms, and the device guarantees valid RESET output (≥0.8×VCC high, ≤0.4V low) across its entire 0.7V–5.5V operating supply range, ensuring deterministic behavior during brownout and power-up sequencing in µP-based systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.8% at +25°C; ensures reliable detection of 3.0V rail brownout before µP malfunction |
| Reset Timeout Period | ≥100ms (nominal 150ms); satisfies JEDEC JESD8-12B power-on reset timing for most 8/16-bit microcontrollers |
| Supply Voltage Range | 0.7V to 5.5V; enables operation during deep brownout and supports 1.8V–5V system rails |
| Quiescent Current | 4µA at 3.0V; extends battery life in portable equipment by minimizing standby drain |
| Output Type | Push/pull active-high RESET; drives CMOS inputs directly without external pullup resistor |
| Operating Temperature | –40°C to +125°C; qualified for under-hood automotive and industrial control environments |
| MR Input Logic | Active-low with 20kΩ internal pullup; simplifies manual reset implementation using momentary switch to GND |
Pinout & Package
MAX6803US29D3+T is housed in a 4-pin SOT143 package (U4-1 outline), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads optimized for automated assembly and thermal performance in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and reset comparator; must be connected to system ground plane |
| 2 | RESET | Active-high push/pull output; sources current to drive µP reset input high during fault conditions |
| 3 | MR | Manual-reset input; logic low (≤0.3×VCC) asserts reset; internally pulled up to VCC |
| 4 | VCC | Primary power supply input; powers internal comparator, timer, and output driver; accepts 0.7V–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.93V with ±1.8% tolerance at +25°C enables drop-in replacement without calibration |
| Guaranteed reset validity to 0.7V VCC | Ensures deterministic RESET state even during severe brownout, preventing µP latch-up |
| Debounced MR input with 50ns glitch immunity | Eliminates need for external RC filter or Schmitt trigger, reducing BOM count and board area |
| Three standard timeout options (1ms/20ms/100ms) | 100ms option (D3 suffix) meets extended reset requirements for flash programming and peripheral initialization |
| SOT143 footprint compatibility | Pins match MAX811/MAX812 and MAX6314/MAX6315, enabling layout reuse across legacy designs |
Applications
| Battery-Powered Data Loggers | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Long-term environmental monitoring using coin-cell or Li-ion battery with intermittent wake-up cycles. IC Role / Device Role / Timing Role: Supervises 3.3V system rail and asserts active-high RESET to hold µC in reset until stable power is confirmed post-wake. Use Value: 4µA supply current minimizes battery drain during sleep; 2.93V threshold prevents false resets during gradual battery discharge. | Use Scenario: DIN-rail mounted controller with isolated 24V DC input converted to 3.3V/5V for logic and communication ICs. IC Role / Device Role / Timing Role: Monitors 3.3V domain and generates ≥100ms reset pulse on power-up or transient-induced brownout. Use Value: –40°C to +125°C rating ensures reliability in uncontrolled cabinet environments; push/pull output drives optocoupler input directly. |
| Medical Point-of-Care Devices | Automotive Body Control Modules |
Use Scenario: Handheld diagnostic tool powered from USB or internal LiPo, requiring fail-safe boot sequence. IC Role / Device Role / Timing Role: Provides active-high reset signal to ARM Cortex-M0+ MCU, synchronized with 3.0V LDO output. Use Value: 2.93V threshold aligns with 3.0V rail tolerance; 100ms timeout accommodates slow-starting analog front-end circuits. | Use Scenario: Under-dash module exposed to engine bay temperatures, monitoring 5.0V supply derived from vehicle battery. IC Role / Device Role / Timing Role: Detects battery sag below 4.5V during cranking and holds ECU in reset until stable 5.0V is restored. Use Value: Valid operation down to 0.7V ensures reset assertion even during extreme cold-cranking events; SOT143 package withstands thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811SUR29D3+T | Same 2.93V threshold and 100ms timeout, but active-low open-drain RESET output | Requires external pullup resistor; incompatible with µPs needing active-high reset assertion | Select only if system design already uses open-drain reset bus architecture |
| MAX6315US29D3+T | Identical pinout and electrical specs, but rated only to +85°C ambient (not +125°C) | Not suitable for under-hood or high-temperature industrial enclosures | Choose for cost-sensitive commercial-grade applications where extended temperature is unnecessary |
Compared with MAX811SUR29D3+T and MAX6315US29D3+T, the MAX6803US29D3+T uniquely delivers active-high push/pull output with full automotive-grade temperature support, eliminating external components while ensuring robust reset signaling across harsh operating conditions.
Availability
MAX6803US29D3+T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial PLC modules, medical diagnostics, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6803US29D3+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 demanding industrial, automotive, and computing applications.
The MAX6803 series targets space-constrained µP supervisory needs with ultra-low-power, factory-trimmed reset thresholds and guaranteed operation down to 0.7V-enabling reliable power monitoring in portable and harsh-environment systems.
FAQ
What is the exact reset threshold voltage for MAX6803US29D3+T?
The MAX6803US29D3+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 temperature range. This value is confirmed in Table 1 of the official datasheet and corresponds to the "29" suffix in the part number. The threshold is referenced to VCC and remains stable against supply transients due to internal comparator design.
Does MAX6803US29D3+T support active-high reset output?
Yes, the MAX6803US29D3+T provides an active-high push/pull RESET output, distinguishing it from the MAX6804 (active-low push/pull) and MAX6805 (active-low open-drain). When asserted, RESET outputs ≥0.8×VCC; when deasserted, it sinks to ≤0.4V. This eliminates the need for an external pullup resistor and directly interfaces with µP reset pins requiring high-active assertion.
What is the minimum reset timeout period for MAX6803US29D3+T?
The MAX6803US29D3+T has a minimum reset timeout period of 100ms, indicated by the "D3" suffix in the part number. Typical and maximum values are 150ms and 200ms respectively, measured from the moment VCC rises above 2.93V or MR is released. This satisfies extended reset timing requirements for flash memory initialization and multi-stage power sequencing in embedded systems.
Can MAX6803US29D3+T operate at very low supply voltages?
Yes, the MAX6803US29D3+T is guaranteed to function correctly down to 0.7V VCC, with full reset assertion capability maintained across this range. At VCC = 0.7V, the RESET output still sources ≥0.8×VCC (≥0.56V), ensuring valid logic-high signaling to downstream µPs-even during deep brownout conditions typical in battery-depleted states.
Is MAX6803US29D3+T compatible with existing SOT143 footprints used for MAX811/MAX812?
Yes, the MAX6803US29D3+T uses the identical 4-pin SOT143 package (U4-1 outline) and pin configuration as MAX811/MAX812 and MAX6314/MAX6315. Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC. However, due to its active-high output versus the active-low outputs of those parts, PCB-level substitution requires verification of reset polarity compatibility in the target system.
MAX6803US29D3+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:
- Obsolete
- 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 High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6803US29D3+T FAQ
1.How can I place an order for MAX6803US29D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6803US29D3+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 MAX6803US29D3+T reliable?
The price and inventory of MAX6803US29D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6803US29D3+T is usually 5 days.
3.What payment methods are accepted for MAX6803US29D3+T?
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4.How is shipping managed for MAX6803US29D3+T?
MAX6803US29D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6803US29D3+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 MAX6803US29D3+T?
For technical support, including MAX6803US29D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6803US29D3+T requirements.
6.How does Aetrix verify that MAX6803US29D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6803US29D3+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 MAX6803US29D3+T meets industry standards.
7.What is the process for return or replacement of MAX6803US29D3+T?
All MAX6803US29D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6803US29D3+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 MAX6803US29D3+T part is unused and in its original packaging.
Return procedure for MAX6803US29D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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