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Analog Devices Inc./Maxim Integrated MAX6833FXRD0
- Part No.:
- MAX6833FXRD0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6833FXRD0.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,409
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Product details
Overview
MAX6833FXRD0 from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit in SC70-3 package, designed to monitor +1.2V to +1.8V supplies and assert reset when VCC drops below 1.050V (±2.5% over temperature). It features a 1.5ms reset timeout, 7.5µA typical supply current, and guaranteed RESET validity down to VCC = 0.75V - ideal for portable battery-powered µP systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6833FXRD0 datasheet, MAX6833FXRD0 pinout, MAX6833FXRD0 application, or MAX6833FXRD0 equivalent, this device serves as a low-power, precision voltage detector with factory-trimmed threshold and fixed timeout - critical for embedded systems where supply stability, board space, and quiescent current are constrained.
Technical Context
The MAX6833FXRD0 implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across –40°C to +85°C, paired with a fixed 1.5ms reset timeout timer (D1 suffix). Its push-pull active-high RESET output drives high during fault conditions and remains asserted for the full timeout after VCC recovers above 1.050V.
No manual reset (MR) or RESET-IN pins are present on the SC70-3 variant - it monitors only VCC and provides a dedicated active-high reset signal. The device operates from VCC = 0.75V to 3.6V and maintains valid RESET output down to VCC = 0.75V, ensuring deterministic behavior during deep brownout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.050V ±2.5% - precisely matches 1.05V nominal supply rails; enables reliable detection of 1.2V system brownout without external calibration. |
| Reset Timeout | 1.5ms - ensures sufficient hold time for µP core initialization after power recovery; avoids premature release during supply settling. |
| Supply Current | 7.5µA (typ) at 1.2V - minimizes battery drain in always-on monitoring applications; supports >10-year operation in coin-cell-powered devices. |
| Operating Voltage Range | 0.75V to 3.6V - guarantees functional reset assertion even during severe undervoltage; supports operation down to near-zero VCC ramp-up. |
| Output Type | Push-pull active-high - eliminates need for external pullup; directly interfaces with µP reset inputs requiring active-high assertion (e.g., ARM Cortex-M series). |
| Package | SC70-3 - 1.25mm × 0.85mm footprint; enables ultra-compact placement adjacent to µP or PMIC in space-constrained portable designs. |
| Temperature Range | –40°C to +85°C - qualified for industrial and automotive cabin-temperature environments; no derating required. |
Pinout & Package
MAX6833FXRD0 is housed in a 3-pin SC70 package (1.25mm × 0.85mm, 0.5mm pitch), with pin 1 = GND, pin 2 = RESET (push-pull active-high), pin 3 = VCC. No MR or RESET-IN terminals - dedicated single-supply monitoring only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground for internal comparator and output driver; must be connected to system ground plane with low-impedance path. |
| 2 | RESET | Push-pull active-high output; drives HIGH during reset condition (VCC < 1.050V); sinks 150µA while asserted, sources 50µA while deasserted. |
| 3 | VCC | Monitored supply input and power source; accepts 0.75V–3.6V; internal circuitry remains functional and asserts valid RESET down to 0.75V. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.050V threshold | Eliminates external resistor divider or trimming; reduces BOM count and layout area while guaranteeing ±2.5% accuracy over full temperature range. |
| 1.5ms fixed timeout | Matches typical µP power-up stabilization time; prevents race conditions between clock enable, PLL lock, and core initialization sequences. |
| 7.5µA supply current | Enables continuous supervision in energy-harvesting or battery-backed systems without compromising runtime; no enable/disable control needed. |
| Active-high push-pull output | Directly drives standard µP reset inputs without pullup resistors; simplifies routing and avoids floating states during power transitions. |
| SC70-3 package | Reduces PCB real estate by >60% vs. SOT-23; compatible with high-density reflow processes; thermal resistance θJA = 345°C/W. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Wearable ECG patch continuously monitors battery voltage and asserts reset if Li-ion cell drops below 3.0V under load, preventing corrupted sensor data logging. IC Role / Device Role / Timing Role: Voltage supervisor providing active-high reset to ARM Cortex-M0+ MCU; initiates controlled shutdown sequence before brownout-induced memory corruption. Use Value: 1.050V threshold aligns with 1.2V LDO output feeding MCU core; 1.5ms timeout ensures flash controller completes write-before-reset, preserving last vital waveform segment. |
Use Scenario: DIN-rail mounted I/O module powers up in harsh factory environments where 24V DC supply may sag during motor startup, risking firmware crash. IC Role / Device Role / Timing Role: Primary reset generator for dual-core RISC-V processor; monitors 1.2V core rail derived from isolated DC/DC converter. Use Value: Guaranteed RESET validity down to VCC = 0.75V prevents spurious resets during transient sags; SC70-3 footprint allows placement directly beside PMIC, minimizing noise coupling. |
| Smart Meter Battery Backup | Automotive Infotainment Subsystem |
|
Use Scenario: Electricity meter retains time-of-use data during AC mains failure using supercapacitor backup; supervisor ensures RTC and secure EEPROM reset cleanly when backup voltage falls. IC Role / Device Role / Timing Role: Low-power reset controller for MSP430FR59xx MCU; triggers controlled save-and-hibernate routine upon 1.05V threshold breach. Use Value: 7.5µA quiescent current extends supercapacitor hold-up time by >12%; factory-trimmed threshold removes calibration step in high-volume meter production. |
Use Scenario: Head unit subsystem powers up from vehicle battery via 1.2V buck converter; supervisor validates stable core voltage before enabling CAN transceiver and display controller. IC Role / Device Role / Timing Role: Power-good monitor for infotainment SoC's 1.2V core domain; generates synchronized reset pulse to multiple peripherals via fanout buffer. Use Value: Push-pull active-high output eliminates level-shifter requirement; 1.5ms timeout accommodates worst-case 1.2V rail rise time (200ms) plus SoC internal delay margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6833HXRD0 | Reset threshold = 1.313V (vs. 1.050V); same SC70-3 package, 1.5ms timeout, push-pull active-high output. | Designed for 1.35V–1.5V supply domains (e.g., DDR I/O rails); not suitable for 1.2V core monitoring without risk of false reset. | Select only if system VCC nominal is ≥1.35V; verify compatibility with µP reset voltage tolerance (e.g., some MCUs require reset assertion at ≥70% VDD). |
| MAX6316HUT46+T | Active-low open-drain output; 1.6V threshold; 140ms timeout; SOT-23-3 package; 1.5µA supply current. | Requires external pullup; suited for bidirectional reset buses or multi-vendor µP compatibility; longer timeout targets slower logic families. | Choose when interoperability with legacy active-low reset architectures is required; not drop-in due to output polarity and timing mismatch. |
Compared with MAX6833FXRD0, MAX6833HXRD0 shifts threshold upward for higher-voltage rails but retains identical timing and drive strength, while MAX6316HUT46+T trades lower power and open-drain flexibility for incompatible output polarity and significantly longer timeout - necessitating schematic and firmware validation.
Availability
MAX6833FXRD0 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter battery backup, and automotive infotainment subsystems requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6833FXRD0 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 - emphasizing reliability, integration, and low-power operation.
The MAX6832–MAX6840 family delivers ultra-low-voltage µP supervisory circuits optimized for space- and power-constrained digital systems operating from 1.2V to 1.8V supplies, with factory-trimmed thresholds and SC70 packaging for minimal footprint.
FAQ
What is the exact reset threshold voltage of the MAX6833FXRD0, and how accurate is it over temperature?
The MAX6833FXRD0 has a factory-set reset threshold of 1.050V with ±2.5% accuracy over the full operating temperature range of –40°C to +85°C. This specification is guaranteed by design and verified across production lots - not just typical - ensuring consistent brownout detection in all environmental conditions where the MAX6833FXRD0 is deployed.
Does the MAX6833FXRD0 include a manual reset (MR) input or RESET-IN pin?
No, the MAX6833FXRD0 does not include MR or RESET-IN functionality. As a 3-pin SC70 variant, it monitors only the VCC supply and provides a dedicated push-pull active-high RESET output. Manual reset capability is available only on 4-pin versions like MAX6836FXSD0, and adjustable threshold (RESET-IN) appears only on MAX6838/MAX6839/MAX6840 variants.
What is the minimum VCC voltage at which the MAX6833FXRD0 guarantees valid RESET output assertion?
The MAX6833FXRD0 guarantees valid RESET output down to VCC = 0.75V for active-high assertion. Below this voltage, the internal circuitry cannot maintain specified VOH/ VOL levels. This ensures deterministic reset behavior during deep brownout events common in battery-powered systems approaching end-of-life discharge.
Can the MAX6833FXRD0 be used with a 3.3V supply, and what happens to its reset threshold?
Yes, the MAX6833FXRD0 operates with VCC up to 3.6V, but its reset threshold remains fixed at 1.050V regardless of supply voltage. It will assert RESET whenever VCC falls below 1.050V - making it unsuitable for direct 3.3V rail monitoring. For 3.3V systems, use a version with higher threshold (e.g., MAX6833VXRD0 at 1.575V) or add an external resistive divider to scale the monitored voltage.
Is the MAX6833FXRD0 pin-compatible with older Maxim reset supervisors like the MAX809?
No, the MAX6833FXRD0 is not pin-compatible with MAX809. While both are 3-pin reset supervisors, MAX809 uses SOT-23-3 with pin 1 = VCC, pin 2 = GND, pin 3 = RESET (active-low), whereas MAX6833FXRD0 uses SC70-3 with pin 1 = GND, pin 2 = RESET (active-high), pin 3 = VCC. Layout redesign and firmware logic adjustment are required for substitution.
MAX6833FXRD0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.575V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6833FXRD0 FAQ
1.How can I place an order for MAX6833FXRD0 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6833FXRD0 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 MAX6833FXRD0 reliable?
The price and inventory of MAX6833FXRD0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6833FXRD0 is usually 5 days.
3.What payment methods are accepted for MAX6833FXRD0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6833FXRD0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6833FXRD0?
MAX6833FXRD0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6833FXRD0 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 MAX6833FXRD0?
For technical support, including MAX6833FXRD0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6833FXRD0 requirements.
6.How does Aetrix verify that MAX6833FXRD0 is sourced from the original manufacturer or authorized distributors?
All MAX6833FXRD0 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 MAX6833FXRD0 meets industry standards.
7.What is the process for return or replacement of MAX6833FXRD0?
All MAX6833FXRD0 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6833FXRD0, 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 MAX6833FXRD0 part is unused and in its original packaging.
Return procedure for MAX6833FXRD0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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