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Analog Devices Inc./Maxim Integrated MAX6804US46D3
- Part No.:
- MAX6804US46D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6804US46D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
MAX6804US46D3 from Maxim Integrated is a push/pull active-low microprocessor supervisory circuit designed for precise 4.63V power-supply monitoring in embedded systems. It asserts RESET when VCC drops below 4.63V or upon manual reset, holds reset for ≥100ms after recovery, and operates down to 0.7V supply-enabling reliable brownout detection in automotive controllers and battery-powered instrumentation.
For engineers reviewing the MAX6804US46D3 datasheet, MAX6804US46D3 pinout, MAX6804US46D3 application, or MAX6804US46D3 equivalent, key selection criteria include its factory-trimmed 4.63V threshold, guaranteed 100ms minimum timeout, push/pull output drive capability, ultra-low 4–12µA supply current, and SOT143 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6804US46D3 implements a precision bandgap-based voltage comparator with ±3% threshold accuracy over –40°C to +125°C, immune to fast VCC transients (e.g., ≤30µs glitches at 100mV overdrive). Its internal MR pullup resistor (12–30kΩ) enables direct connection to momentary switches without external components.
Reset assertion is synchronized to VCC crossing the 4.63V threshold with <30µs propagation delay during falling-edge detection; the 100ms timeout is factory-programmed and temperature-stable (±15% over full range), ensuring deterministic power-on sequencing in µP-based industrial controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±3% (factory-trimmed; ensures accurate 5V rail brownout detection) |
| Reset Timeout | ≥100ms (guaranteed minimum; provides sufficient µP initialization time) |
| Supply Voltage Range | 0.7V to 5.5V (supports operation during deep brownout and full-rail startup) |
| Supply Current | 4–12µA (ultra-low quiescent draw; extends battery life in portable equipment) |
| Output Type | Active-low push/pull (drives RESET low without external pullup; simplifies interface) |
| MR Input | Debounced, internally pulled up (12–30kΩ); accepts momentary switch to GND) |
| Operating Temp | –40°C to +125°C (fully specified for automotive under-hood and industrial environments) |
Pinout & Package
MAX6804US46D3 is housed in a 4-pin SOT143 package (1.3mm × 2.1mm footprint), optimized for high-density PCB layouts. Pin 1 = GND, Pin 2 = RESET (active-low push/pull), Pin 3 = MR (manual reset input), Pin 4 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Common return path for all internal circuitry; must be low-impedance to ensure comparator accuracy |
| 2 (RESET) | Active-low reset output | Push/pull driver asserts logic low during fault; no external pullup required; sinks ≥1.2mA at VCC ≥3.0V |
| 3 (MR) | Manual reset input | Logic-low active; internal 20kΩ pullup allows direct switch-to-GND connection; 1µs minimum pulse width |
| 4 (VCC) | Supply voltage input | Power source for internal regulator and comparator; supports operation down to 0.7V for fail-safe behavior |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V threshold | Eliminates external resistor dividers and calibration; meets tight 5V system tolerance requirements |
| 100ms minimum reset timeout | Guarantees µP reset hold time exceeds typical boot ROM execution latency |
| 0.7V minimum operating voltage | Ensures valid RESET assertion even as VCC collapses during power failure |
| 4–12µA supply current | Reduces standby power in always-on monitoring circuits (e.g., automotive ECU wake-up logic) |
| Debounced MR input with internal pullup | Removes need for RC filters or Schmitt triggers; simplifies front-panel reset implementation |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Monitors 5V supply rail in engine management systems subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to MCU during brownout events. Use Value: Guaranteed operation down to 0.7V and 100ms timeout prevent spurious reboots during cranking-induced voltage sag. |
Use Scenario: Ensures deterministic restart of PLC CPU after AC power interruption or brownout. IC Role / Device Role / Timing Role: Power-on reset generator with manual override via front-panel button. Use Value: Factory-set 4.63V threshold matches nominal 5V LDO output; push/pull output drives reset net without pullup. |
| Portable Medical Instrumentation | Battery-Powered Data Logger |
Use Scenario: Maintains safe shutdown state in handheld diagnostic devices powered by Li-ion batteries. IC Role / Device Role / Timing Role: Low-power supervisor detecting end-of-discharge (4.63V ≈ 90% SoC for 2S pack). Use Value: 4–12µA ICC extends operational runtime; MR input enables user-initiated recalibration reset. |
Use Scenario: Provides reliable power-on reset for ARM Cortex-M based loggers deployed in remote locations. IC Role / Device Role / Timing Role: Reset sequencer asserting RESET until stable 3.3V/5V rails are established. Use Value: Immunity to <30µs VCC glitches prevents false resets during switching regulator noise bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811TEUS+T | 4.63V threshold, 140ms timeout, same SOT143 package, but higher 15µA ICC | Lacks debounced MR input; requires external RC filter for switch interface | Select when longer timeout is acceptable and MR debounce is implemented externally |
| TPS3808G33DBVR | 3.3V threshold (not 4.63V); adjustable timeout via capacitor; 1.6µA ICC; SOT23-5 package | Requires external timing capacitor and pullup; different pinout and footprint | Select only if threshold adjustment is needed and board layout allows SOT23-5 rework |
Compared with MAX811TEUS+T and TPS3808G33DBVR, the MAX6804US46D3 delivers exact 4.63V detection with integrated MR debounce and lowest possible footprint-making it optimal for fixed-threshold, space-constrained 5V systems where minimal BOM count and guaranteed 100ms hold time are critical.
Availability
MAX6804US46D3 is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6804US46D3 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 and mixed-signal ICs for demanding industrial, automotive, and computing applications.
The MAX680x family delivers ultra-low-power, factory-trimmed supervisory circuits targeting space- and power-sensitive µP reset applications-especially where guaranteed operation down to 0.7V and pin-compatible upgrade paths matter.
FAQ
What is the exact reset threshold voltage of MAX6804US46D3?
The MAX6804US46D3 features a factory-trimmed reset threshold of 4.63V, with ±3% tolerance 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 "46" suffix in the part number. The threshold is set using laser trimming during production to ensure accuracy without external components.
Does MAX6804US46D3 require an external pullup resistor on the RESET pin?
No, MAX6804US46D3 does not require an external pullup resistor because it uses a push/pull output stage. The RESET pin actively drives low during assertion and high during deassertion, eliminating dependency on external biasing. This simplifies design and improves noise immunity compared to open-drain alternatives like the MAX6805US46D3.
What is the minimum supply voltage at which MAX6804US46D3 guarantees correct RESET output behavior?
MAX6804US46D3 guarantees correct RESET/RESET output states down to VCC = 0.7V, as explicitly stated in the datasheet's General Description and Absolute Maximum Ratings sections. This ensures fail-safe reset assertion even during severe brownout conditions before the host µP loses functionality.
How is the 100ms reset timeout period implemented in MAX6804US46D3?
The 100ms reset timeout in MAX6804US46D3 is factory-programmed and internally generated-no external capacitor is needed. The "D3" suffix denotes the 100ms minimum timeout variant. Electrical Characteristics confirm tRP ≥100ms (typical 150ms, max 200ms), with ±15% stability over temperature, providing predictable µP initialization timing.
Is MAX6804US46D3 pin-compatible with other supervisory ICs?
Yes, MAX6804US46D3 is pin-compatible with the MAX811/MAX812 and MAX6314/MAX6315 families in the 4-pin SOT143 package. Pin assignments (GND, RESET, MR, VCC) match exactly, enabling drop-in replacement where the 4.63V threshold and 100ms timeout meet system requirements-subject to verification of output type (push/pull) and MR interface compatibility.
MAX6804US46D3 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 Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-4
MAX6804US46D3 FAQ
1.How can I place an order for MAX6804US46D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6804US46D3 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 MAX6804US46D3 reliable?
The price and inventory of MAX6804US46D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6804US46D3 is usually 5 days.
3.What payment methods are accepted for MAX6804US46D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6804US46D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6804US46D3?
MAX6804US46D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6804US46D3 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 MAX6804US46D3?
For technical support, including MAX6804US46D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6804US46D3 requirements.
6.How does Aetrix verify that MAX6804US46D3 is sourced from the original manufacturer or authorized distributors?
All MAX6804US46D3 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 MAX6804US46D3 meets industry standards.
7.What is the process for return or replacement of MAX6804US46D3?
All MAX6804US46D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6804US46D3, 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 MAX6804US46D3 part is unused and in its original packaging.
Return procedure for MAX6804US46D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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