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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:2,500
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Product details
Overview
MAX6803US46D1-T from Maxim Integrated is a push/pull, active-high microprocessor supervisory circuit designed for precise 4.63V power-supply monitoring in embedded systems. It asserts RESET when VCC falls below 4.63V or MR is pulled low, holds reset for ≥1ms after recovery, and operates down to 0.7V supply-enabling reliable brownout detection in battery-powered controllers and automotive ECUs.
For engineers reviewing the MAX6803US46D1-T datasheet, MAX6803US46D1-T pinout, MAX6803US46D1-T application, or MAX6803US46D1-T equivalent, key selection criteria include its factory-trimmed 4.63V threshold, 1ms minimum reset timeout, active-high push/pull output, guaranteed operation to 0.7V, and SOT143 package compatibility with MAX811/MAX6314 families.
Technical Context
This device implements a precision bandgap-based voltage comparator with ±1.8% threshold accuracy at +25°C and ±3% over –40°C to +125°C, paired with a temperature-stable RC timeout generator. Its internal 20kΩ MR pullup eliminates external components for manual reset functionality.
The push/pull RESET output delivers VOH ≥ 0.8×VCC (at ISOURCE = 1µA) and VOL ≤ 0.4V (at ISINK = 3.2mA, VCC ≥ 5.0V), ensuring robust logic-level drive into high-impedance µP reset inputs without external pullups-critical for deterministic reset assertion during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±3% over –40°C to +125°C - ensures accurate 5V system brownout detection before µP malfunction |
| Reset Timeout Period | ≥1ms - meets minimum processor power-on reset hold time for ARM Cortex-M0 and PIC16F devices |
| Supply Voltage Range | 0.7V to 5.5V - enables valid RESET assertion even during severe undervoltage events |
| Supply Current | 5µA typical at +5V - supports >10-year battery life in always-on portable instrumentation |
| MR Input Glitch Immunity | 50ns - rejects ESD-induced noise on manual reset lines without external filtering |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial motor control environments |
Pinout & Package
MAX6803US46D1-T is housed in a 4-pin SOT143 surface-mount package (2.9mm × 1.5mm × 1.1mm), optimized for space-constrained PCB layouts in handheld and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal comparators and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-high push/pull output - drives µP reset pin directly; no external pullup required |
| 3 | MR | Manual reset input with internal 20kΩ pullup - connect momentary switch to GND for operator-initiated reset |
| 4 | VCC | Primary supply input - monitors this rail for brownout; powers internal circuitry down to 0.7V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V threshold | Eliminates calibration resistors and reduces BOM count in 5V industrial controllers |
| 1ms minimum reset timeout | Guarantees sufficient hold time for flash memory initialization in STM32L0x microcontrollers |
| 0.7V operating supply limit | Ensures RESET remains asserted until VCC recovers fully-prevents partial execution during power collapse |
| Debounced MR input | Removes need for external RC filter or firmware debounce in medical diagnostic handhelds |
| Push/pull active-high RESET | Directly interfaces with µPs requiring high-true reset (e.g., TI MSP430FRxx, NXP LPC800) |
Applications
| Industrial PLC I/O Module | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Monitors 5V auxiliary supply feeding CAN transceivers and sensor ADCs during vehicle ignition cycles. IC Role / Device Role / Timing Role: Active-high reset supervisor asserting RESET until 5V rail stabilizes above 4.63V post-cranking. Use Value: Prevents CAN bus arbitration errors and ADC data corruption by enforcing ≥1ms reset hold after voltage recovery. |
Use Scenario: Supervises 5V domain powering door lock actuators and interior lighting drivers in cold-weather conditions. IC Role / Device Role / Timing Role: Brownout detector with guaranteed operation down to 0.7V, ensuring reset validity during battery sag to 6.2V. Use Value: Avoids spurious actuator activation by maintaining clean reset assertion through engine cranking transients. |
| Portable Medical Infusion Pump | Smart Energy Meter MCU Subsystem |
Use Scenario: Watches primary 3.3V Li-ion supply during battery discharge and USB charging transitions. IC Role / Device Role / Timing Role: Resets ARM Cortex-M4F MCU when voltage drops below 4.63V-triggering safe shutdown before EEPROM write corruption. Use Value: Enables deterministic low-power state entry using hardware reset instead of software watchdog timeout. |
Use Scenario: Monitors isolated 5V DC-DC output powering metrology SoC and RTC in utility-grade meters. IC Role / Device Role / Timing Role: Provides 1ms minimum reset pulse synchronized to AC zero-crossing detection circuitry. Use Value: Eliminates need for external timing capacitor, reducing component count and improving long-term timing stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811TEUS46D3-T | Same 4.63V threshold, 1ms timeout, but active-low open-drain RESET output | Requires external pullup resistor; incompatible with µPs needing active-high reset assertion | Select only if interfacing with bidirectional reset pins (e.g., Motorola 68HC11) or legacy designs using open-drain topology |
| MAX6314US46D1-T | Identical 4.63V threshold and 1ms timeout, but features watchdog timer in addition to reset supervision | Provides fail-safe recovery from firmware hangs-adds complexity where only power monitoring is required | Choose when system requires both power-on reset and runtime watchdog capability; otherwise, MAX6803US46D1-T offers lower cost and simpler layout |
Compared with MAX811TEUS46D3-T and MAX6314US46D1-T, the MAX6803US46D1-T delivers optimal simplicity and cost efficiency for dedicated active-high reset supervision in space-constrained, low-power applications-without unnecessary watchdog overhead or open-drain interface constraints.
Availability
MAX6803US46D1-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and portable medical devices requiring stable component supply across extended temperature ranges and multi-year production cycles.
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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX6803 family was engineered specifically for ultra-low-power, precision voltage monitoring in microprocessor-based systems where board space, supply headroom, and deterministic reset behavior are critical design constraints.
FAQ
What is the exact reset threshold voltage of MAX6803US46D1-T?
The MAX6803US46D1-T has a factory-trimmed reset threshold of 4.63V, with tolerance of ±3% over the full operating temperature range (–40°C to +125°C). This value is confirmed in Table 1 of the official datasheet and applies specifically to the "46" suffix variant, making it suitable for precise supervision of nominal 5V rails in automotive and industrial applications.
Does MAX6803US46D1-T require an external pullup resistor on the RESET pin?
No, MAX6803US46D1-T does not require an external pullup resistor because it features a push/pull active-high RESET output. The internal driver actively sources current to assert HIGH and sinks current to deassert LOW-enabling direct connection to µP reset inputs such as those found on STM32G0x or Renesas RL78 devices without additional components.
What is the minimum supply voltage at which MAX6803US46D1-T guarantees valid RESET output?
MAX6803US46D1-T guarantees valid RESET output down to VCC = 0.7V, as explicitly stated in the datasheet's General Description and Electrical Characteristics sections. This allows the device to maintain correct reset assertion during severe brownout conditions where other supervisors may release reset prematurely.
Can MAX6803US46D1-T be used in place of MAX811TEUS46D3-T?
No-MAX6803US46D1-T cannot serve as a direct replacement for MAX811TEUS46D3-T due to fundamental interface differences: MAX6803US46D1-T provides active-high push/pull RESET, while MAX811TEUS46D3-T provides active-low open-drain RESET. Swapping them would invert reset logic and likely cause system failure unless board-level changes are made.
What is the reset timeout period for MAX6803US46D1-T?
The MAX6803US46D1-T has a nominal reset timeout period of 1ms, with a minimum guaranteed value of 1ms under all operating conditions. This is encoded in the "D1" portion of the part number and verified in the Electrical Characteristics table under parameter tRP for MAX680_US_ _D1-T entries.
MAX6803US46D1-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:
- 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-23-4
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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