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Analog Devices Inc./Maxim Integrated MAX6803US46D1+T
- Part No.:
- MAX6803US46D1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6803US46D1+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,141
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Product details
Overview
MAX6803US46D1+T from Maxim Integrated is a 4-pin SOT143 push/pull active-high microprocessor supervisory circuit designed for precise power supply monitoring in embedded systems. It asserts a high-level RESET signal when VCC drops below 4.63V (±3% over temperature) or upon manual reset, with a guaranteed minimum 1ms timeout and ultra-low 4µA supply current at 3V. It operates down to 0.7V and supports critical µP power monitoring in portable and industrial controllers.
For engineers reviewing the MAX6803US46D1+T datasheet, MAX6803US46D1+T pinout, MAX6803US46D1+T application, or MAX6803US46D1+T equivalent, this device delivers factory-trimmed 4.63V threshold supervision with 1ms reset timeout, push/pull active-high output, and guaranteed reset validity down to VCC = 0.7V - key selection criteria for battery-powered and automotive-qualified designs requiring deterministic reset behavior during brownout.
Technical Context
The MAX6803US46D1+T implements a precision bandgap-based voltage comparator with internal hysteresis and a monostable timeout circuit triggered by VCC falling below 4.63V or MR assertion. Its push/pull output stage sources up to 800µA at VCC ≥ 4.25V while maintaining VOH ≥ 0.8×VCC, enabling direct interface with CMOS inputs without external pullups.
Reset propagation delay is specified at 30µs for VCC falling at 10V/ms, and the device features built-in immunity to fast transients - rejecting glitches ≤50ns and suppressing false resets for overdrive-dependent pulse widths per the Maximum Transient Duration vs. Comparator Overdrive curve. MR input includes internal 20kΩ pullup and 1µs minimum pulse width requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±3% over -40°C to +125°C - ensures reliable brownout detection for 5V systems with margin against supply ripple |
| Reset Timeout Period | 1ms minimum - provides sufficient hold time for µP initialization without delaying system startup |
| Supply Voltage Range | 0.7V to 5.5V - enables operation during deep brownout and supports wide-input industrial power rails |
| Supply Current | 4µA typical at VCC = 3.0V - minimizes quiescent load in always-on battery backup circuits |
| Output Type | Push/pull active-high RESET - eliminates need for external pullup resistor and ensures defined logic level at all times |
| MR Input Logic | Active-low with 20kΩ internal pullup - allows momentary switch-to-GND connection without external components |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
Pinout & Package
MAX6803US46D1+T is housed in a 4-pin SOT143 package (U4-1 outline, land pattern 90-0183), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and reset comparator; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-high push/pull output; drives high during reset assertion (VCC < 4.63V or MR low), sinks current when deasserted |
| 3 | MR | Manual-reset input; logic-low assertion triggers reset; internally pulled up to VCC via 20kΩ resistor |
| 4 | VCC | Primary power supply input; monitored for brownout; powers internal regulator and comparator circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V threshold | Eliminates external resistor divider calibration and improves long-term accuracy over temperature (-40°C to +125°C) |
| 1ms minimum reset timeout | Guarantees µP reset hold time meets minimum initialization requirements of ARM Cortex-M0/M3 and PIC16/18 families |
| 0.7V minimum operating voltage | Enables valid reset assertion during severe brownout conditions where other supervisors fail silently |
| Debounced MR input | Rejects mechanical switch bounce and EMI-induced noise without external RC filtering or firmware intervention |
| 4µA supply current at 3V | Extends battery life in coin-cell–powered IoT sensors and real-time clock backup circuits beyond 10 years |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Monitoring 5V rail in programmable logic controller I/O modules exposed to 12V battery transients and cold-crank voltage dips. IC Role / Device Role / Timing Role: Active-high reset supervisor asserting RESET during VCC drop below 4.63V, holding for ≥1ms to ensure FPGA configuration integrity. Use Value: Prevents partial configuration lockup during engine cranking by guaranteeing reset assertion down to 0.7V and rejecting <50ns noise spikes. |
Use Scenario: Power sequencing and fault recovery in body control units powered from vehicle battery with load-dump protection. IC Role / Device Role / Timing Role: Primary brownout detector triggering MCU reset before undervoltage causes EEPROM corruption or CAN bus desynchronization. Use Value: Factory-trimmed 4.63V threshold aligns precisely with automotive 5V LDO dropout margin, eliminating design margin uncertainty. |
| Portable Medical Monitors | Smart Energy Meters |
|
Use Scenario: Supervising main 3.3V supply in handheld ECG devices powered by single Li-ion cell with dynamic load switching. IC Role / Device Role / Timing Role: Ensures clean MCU reset during battery voltage sag caused by RF transmission bursts or display backlight activation. Use Value: Ultra-low 4µA quiescent current preserves battery runtime; 1ms timeout avoids unnecessary delays in patient alarm response path. |
Use Scenario: Reset coordination between metrology SoC and secure element in ANSI C12.22-compliant electricity meters with tamper-detection circuitry. IC Role / Device Role / Timing Role: Provides deterministic reset timing independent of software watchdog, meeting IEC 62056-21 power-fail recovery requirements. Use Value: Push/pull active-high output directly drives dual-rail reset inputs without level-shifting, reducing BOM count and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811TEUS46+T | Same 4.63V threshold and 1ms timeout, but active-low open-drain RESET output; requires external pullup resistor | Limited to systems where µP accepts active-low reset and can accommodate pullup loading on reset line | Select when interfacing with legacy µPs requiring active-low reset or bidirectional reset pins (e.g., Motorola 68HC11) |
| TPS3808G12DBVR | 4.63V threshold with 20ms default timeout (adjustable via capacitor); 1.8µA supply current; operates down to 0.9V | Not suitable for sub-0.9V brownout detection; longer default timeout may delay system recovery in time-critical applications | Prefer for ultra-low-power applications where 20ms reset hold is acceptable and extended VCC range (>0.9V) suffices |
Compared with MAX811TEUS46+T and TPS3808G12DBVR, the MAX6803US46D1+T uniquely combines active-high push/pull output, 0.7V operational floor, and factory-trimmed 4.63V/1ms configuration - making it optimal for new designs requiring minimal external components and guaranteed reset validity during deep brownout.
Availability
MAX6803US46D1+T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and portable medical monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6803US46D1+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 communications applications.
The MAX6803 family delivers highly integrated, low-power µP supervisory circuits with factory-trimmed thresholds and fixed timeout periods - engineered specifically for cost-sensitive, space-constrained embedded systems demanding deterministic reset behavior.
FAQ
What is the exact reset threshold voltage of MAX6803US46D1+T and how does it vary with temperature?
The MAX6803US46D1+T has a factory-trimmed nominal reset threshold of 4.63V at +25°C, with tolerance of ±1.8% at room temperature and ±3% over the full -40°C to +125°C operating range. This specification ensures consistent brownout detection across automotive and industrial thermal environments without requiring external calibration. The MAX6803US46D1+T maintains this accuracy using an internal bandgap reference and laser-trimmed resistive divider.
Does MAX6803US46D1+T require external components for basic reset functionality?
No, the MAX6803US46D1+T requires zero external components for core supervision: its 4.63V threshold is factory-trimmed, MR input includes a 20kΩ internal pullup, and the push/pull active-high RESET output eliminates need for external pullup resistors. Only decoupling capacitance (0.1µF ceramic near VCC pin) is recommended for noise immunity - confirming the MAX6803US46D1+T's role as a true single-chip solution for µP reset management.
How does the 1ms reset timeout of MAX6803US46D1+T compare to industry-standard µP initialization requirements?
The 1ms minimum timeout of MAX6803US46D1+T exceeds the reset hold time requirements of most modern microcontrollers, including ARM Cortex-M0/M3/M4 (typically 100µs–500µs), PIC16/18 (2ms max), and STM32L series (100µs). This margin ensures robust initialization even under worst-case clock startup delays and guarantees that the MAX6803US46D1+T remains asserted throughout the entire µP power-on sequence without premature release.
Can MAX6803US46D1+T operate reliably during severe brownout conditions below 1V?
Yes, the MAX6803US46D1+T is fully specified to operate down to 0.7V and guarantees correct reset state (including valid active-high RESET output) at VCC = 0.7V - a capability confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. This makes the MAX6803US46D1+T uniquely suited for applications like automotive cold-cranking or battery-dead scenarios where competing supervisors cease functioning above 1.0V.
What is the purpose of the debounced MR input on MAX6803US46D1+T and how is it implemented?
The debounced MR input on MAX6803US46D1+T rejects mechanical switch bounce and EMI-induced noise through internal digital filtering, requiring only a 1µs minimum low pulse width to trigger reset - eliminating need for external RC networks or firmware debouncing. Its 20kΩ internal pullup allows direct connection of a momentary switch to GND, simplifying board layout and ensuring deterministic manual reset across temperature and voltage extremes in the MAX6803US46D1+T.
MAX6803US46D1+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:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6803US46D1+T FAQ
1.How can I place an order for MAX6803US46D1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6803US46D1+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 MAX6803US46D1+T reliable?
The price and inventory of MAX6803US46D1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6803US46D1+T is usually 5 days.
3.What payment methods are accepted for MAX6803US46D1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6803US46D1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6803US46D1+T?
MAX6803US46D1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6803US46D1+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 MAX6803US46D1+T?
For technical support, including MAX6803US46D1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6803US46D1+T requirements.
6.How does Aetrix verify that MAX6803US46D1+T is sourced from the original manufacturer or authorized distributors?
All MAX6803US46D1+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 MAX6803US46D1+T meets industry standards.
7.What is the process for return or replacement of MAX6803US46D1+T?
All MAX6803US46D1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6803US46D1+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 MAX6803US46D1+T part is unused and in its original packaging.
Return procedure for MAX6803US46D1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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