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Analog Devices Inc./Maxim Integrated MAX6804US46D2+T
- Part No.:
- MAX6804US46D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6804US46D2+T.pdf
- Description:
- IC RESET MPU LOW PWR SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MAX6804US46D2+T from Maxim Integrated is a 4-pin SOT143 ultra-low-power microprocessor supervisory circuit with active-low push/pull RESET output, 4.63V factory-trimmed reset threshold, and 20ms minimum reset timeout period. It monitors VCC in 2.85V–5.0V systems, asserts reset on power-down/brownout or manual reset, and guarantees valid RESET down to VCC = 0.7V - used in portable battery-powered controllers requiring reliable power-on reset.
For engineers reviewing the MAX6804US46D2+T datasheet, MAX6804US46D2+T pinout, MAX6804US46D2+T application, or MAX6804US46D2+T equivalent, key selection criteria include its 4.63V threshold tolerance (±3% over –40°C to +125°C), 4µA supply current at 3V, debounced MR input with 20kΩ internal pullup, and guaranteed push/pull drive capability during low-VCC operation.
Technical Context
The MAX6804US46D2+T implements a precision bandgap-based reset comparator with factory-trimmed 4.63V threshold (±1.8% at +25°C, ±3% over full temperature range) and immunity to VCC transients ≤30µs at 10V/ms slew rate. Its internal timing circuit generates a fixed 20ms min reset timeout after VCC recovery or MR release.
It features a debounced manual-reset input (MR) with 1µs minimum pulse width, 50ns glitch immunity, and 0.1µs propagation delay. The push/pull RESET output delivers VOH ≥0.8×VCC (ISOURCE = 500µA) and VOL ≤0.4V (ISINK = 3.2mA at VCC ≥4.25V), ensuring robust interfacing with CMOS µP reset inputs.
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 | 20ms min (nominal 30ms) - meets typical µP power-up stabilization requirements without external timing components |
| Supply Current | 4µA at VCC = 3.0V - enables multi-year battery life in always-on portable instrumentation |
| Operating VCC Range | 0.7V to 5.5V - guarantees functional reset assertion even during deep brownout or partial power loss |
| MR Input Pullup | 20kΩ internal - eliminates need for external resistor; supports direct connection of momentary switch to GND |
| RESET Output Type | Active-low push/pull - provides defined high/low states without external pullup, simplifying µP interface design |
| VCC Transient Immunity | Rejects negative-going glitches ≤30µs at 10V/ms - prevents false resets from switching noise or ESD-induced supply dips |
Pinout & Package
MAX6804US46D2+T is housed in a RoHS-compliant 4-pin SOT143 package (outline U4-1, land pattern 90-0183), measuring 2.9mm × 1.6mm × 1.1mm, optimized for space-constrained PCB layouts.
| 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-low push/pull reset output; drives low during VCC < 4.63V or MR assertion, holds low for ≥20ms after recovery |
| 3 | MR | Manual-reset input; logic-low pulse ≥1µs asserts reset; internally pulled up to VCC via 20kΩ resistor |
| 4 | VCC | Primary power supply input; monitored for reset generation; accepts 0.7V–5.5V with full functionality |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V threshold | Eliminates external resistor divider and calibration; achieves ±3% accuracy across industrial temperature range |
| 20ms min reset timeout | Guarantees µP reset hold time exceeds typical oscillator start-up and memory initialization durations |
| 4µA supply current at 3V | Reduces quiescent power in battery-backed systems - e.g., 10-year runtime on a 200mAh coin cell |
| Debounced MR with 20kΩ pullup | Supports direct mechanical switch interface without RC network or firmware debounce overhead |
| Valid RESET down to VCC = 0.7V | Ensures deterministic reset state during deep brownout, preventing µP latch-up or undefined execution |
Applications
| Battery-Powered Data Logger | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Continuous environmental monitoring using AA batteries with periodic wake-up and sensor readout. IC Role / Device Role / Timing Role: Power supervisor asserting active-low RESET during battery voltage sag below 4.63V, holding reset for ≥20ms after recovery to prevent corrupted flash writes. Use Value: Prevents firmware corruption during brownout by guaranteeing reset assertion until stable VCC and µP clock are restored. |
Use Scenario: DIN-rail mounted controller with 24VDC input converted to 5V for µP and peripherals. IC Role / Device Role / Timing Role: Monitors regulated 5V rail; triggers hardware reset on transient dropout or undervoltage, synchronized with watchdog timer. Use Value: Enables fail-safe recovery from power interruptions without requiring µP-initiated software reset sequences. |
| Medical Point-of-Care Device | Smart Energy Meter |
|
Use Scenario: Portable glucose meter with lithium coin cell and LCD display requiring guaranteed boot integrity. IC Role / Device Role / Timing Role: Generates clean power-on reset signal with 20ms hold time, while MR supports user-initiated recalibration reset. Use Value: Ensures deterministic µP startup state before enabling analog front-end and sensor biasing circuits. |
Use Scenario: Revenue-grade electricity meter operating continuously on AC-derived 5V supply with surge exposure. IC Role / Device Role / Timing Role: Detects sustained undervoltage events on 5V rail caused by line sags or rectifier faults, initiating controlled shutdown sequence. Use Value: Maintains data integrity in nonvolatile memory during brownout by extending reset assertion beyond µP's internal reset timeout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811SEUS46+T | Same 4.63V threshold and SOT143 package, but 140ms min timeout and higher 15µA ICC | Designed for systems requiring longer reset hold time; less suitable for fast-recovery embedded controllers | Select when extended reset duration is needed and higher quiescent current is acceptable |
| TPS3808G33DBVR | 3.3V threshold, 20ms timeout, 1.1µA ICC, but requires external pullup for open-drain RESET | Optimized for 3.3V systems; lacks MR input and factory-trimmed 4.63V option | Choose only for 3.3V rails where ultra-low ICC outweighs missing manual reset and precise 4.63V threshold |
Compared with MAX811SEUS46+T and TPS3808G33DBVR, the MAX6804US46D2+T uniquely combines 4.63V precision threshold, 20ms timeout, MR input, and 4µA ICC in a push/pull configuration - making it optimal for 5V battery-powered controllers needing compact, self-contained reset supervision.
Availability
MAX6804US46D2+T is available at Aetrix Electronics and suitable for portable medical devices, industrial PLC modules, smart energy meters, and battery-powered data loggers requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6804US46D2+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 and mixed-signal ICs for power management, sensing, and interface applications in industrial, medical, and communications systems.
The MAX6803/MAX6804/MAX6805 family delivers ultra-low-power, single-function µP reset supervision with factory-trimmed thresholds and minimal external components - targeting space- and power-constrained embedded control applications.
FAQ
What is the exact reset threshold voltage of MAX6804US46D2+T and how stable is it over temperature?
The MAX6804US46D2+T has a factory-trimmed reset threshold of 4.63V, specified as ±1.8% at +25°C and ±3% over the full –40°C to +125°C operating range. This stability ensures consistent brownout detection in 5V systems despite ambient temperature shifts or supply ripple, eliminating need for recalibration or external compensation networks in the MAX6804US46D2+T design.
Does MAX6804US46D2+T support manual reset, and what are the electrical requirements for the MR pin?
Yes, MAX6804US46D2+T includes a debounced manual-reset (MR) input with an internal 20kΩ pullup resistor to VCC. A logic-low pulse ≥1µs on MR asserts RESET; the pin tolerates voltages from 0.3×VCC (VIL) to 0.7×VCC (VIH) and rejects glitches <50ns. No external components are required - simply connect a momentary switch from MR to GND for user-initiated reset in the MAX6804US46D2+T application.
What is the reset timeout behavior of MAX6804US46D2+T after VCC recovers from a brownout?
The MAX6804US46D2+T asserts RESET low while VCC remains below 4.63V and holds RESET active for a minimum of 20ms after VCC rises above the threshold. Typical timeout is 30ms, with maximum 40ms, ensuring sufficient hold time for µP oscillator stabilization and peripheral initialization before releasing reset - a critical timing guarantee built into the MAX6804US46D2+T's internal circuitry.
Can MAX6804US46D2+T operate reliably at very low supply voltages, and what is its minimum functional VCC?
Yes, MAX6804US46D2+T is guaranteed to maintain correct RESET/RESET state down to VCC = 0.7V, with full functionality (including MR response and output drive) confirmed at VCC ≥0.78V over –40°C to +125°C. This enables fail-safe reset assertion during deep brownout conditions where other supervisors may release reset prematurely - a key reliability feature of the MAX6804US46D2+T.
What package type and footprint does MAX6804US46D2+T use, and is lead-free compliance indicated in the part number?
MAX6804US46D2+T uses a 4-pin SOT143 package (outline U4-1, land pattern 90-0183), with dimensions 2.9mm × 1.6mm × 1.1mm. The "+T" suffix explicitly denotes lead-free, RoHS-compliant packaging per Maxim Integrated's ordering convention - distinguishing it from leaded "-T" variants and ensuring compatibility with modern reflow profiles in the MAX6804US46D2+T assembly process.
MAX6804US46D2+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 Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6804US46D2+T FAQ
1.How can I place an order for MAX6804US46D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6804US46D2+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 MAX6804US46D2+T reliable?
The price and inventory of MAX6804US46D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6804US46D2+T is usually 5 days.
3.What payment methods are accepted for MAX6804US46D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6804US46D2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6804US46D2+T?
MAX6804US46D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6804US46D2+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 MAX6804US46D2+T?
For technical support, including MAX6804US46D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6804US46D2+T requirements.
6.How does Aetrix verify that MAX6804US46D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6804US46D2+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 MAX6804US46D2+T meets industry standards.
7.What is the process for return or replacement of MAX6804US46D2+T?
All MAX6804US46D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6804US46D2+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 MAX6804US46D2+T part is unused and in its original packaging.
Return procedure for MAX6804US46D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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