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Analog Devices Inc./Maxim Integrated MAX6832FXRD3+
- Part No.:
- MAX6832FXRD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6832FXRD3+.pdf
- Description:
- MAX6832FXRD3+
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Product details
Overview
MAX6832FXRD3+ from Maxim Integrated is an ultra-low-voltage, 3-pin SC70 push-pull active-low microprocessor reset circuit designed for +1.05V supply monitoring in portable and battery-powered systems. It features a factory-set 1.05V reset threshold (±2.5% over temperature), 210ms reset timeout period (D3 suffix), and 7.5µA typical supply current - enabling reliable power-on reset assertion down to VCC = 0.55V in low-power µP applications.
For engineers reviewing the MAX6832FXRD3+ datasheet, MAX6832FXRD3+ pinout, MAX6832FXRD3+ application, or MAX6832FXRD3+ equivalent, this device serves as a precision voltage detector with fixed delay timing, manual reset immunity to transients, and guaranteed reset validity during brownout conditions - critical for embedded systems requiring deterministic startup behavior under sub-1.2V operation.
Technical Context
The MAX6832FXRD3+ implements a precision bandgap-based voltage comparator with hysteresis (0.75% of VTH) to reject fast VCC transients, ensuring reset assertion only on sustained undervoltage events. Its internal 20kΩ MR pullup enables direct switch-to-ground connection without external components.
This variant belongs to the MAX6832–MAX6837 group: it uses VCC as both supply and monitored rail, asserts RESET low when VCC falls below 1.05V, and holds RESET low for exactly 210ms after VCC rises above threshold - independent of temperature or supply variation within operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.05V ±2.5% over -40°C to +85°C - ensures accurate trip point for 1.0V–1.1V core supplies |
| Reset Timeout Period | 210ms - provides sufficient hold time for slow-ramping µP clocks and PLL lock sequences |
| Supply Current | 7.5µA typ at +25°C - enables multi-year battery life in always-on monitoring circuits |
| Operating Voltage Range | +0.55V to +3.6V - supports valid reset output down to near-zero VCC for deep brownout detection |
| Reset Output Type | Push-pull active-low - eliminates need for external pullup and drives CMOS inputs directly |
| VCC Transient Immunity | Rejects <100ns negative glitches up to 200mV overdrive - prevents spurious resets in noisy environments |
| Package | SC70-3 - 1.25mm × 0.85mm footprint ideal for space-constrained portable PCBs |
Pinout & Package
MAX6832FXRD3+ is housed in a 3-pin SC70 package (1.25mm × 0.85mm, 0.65mm pitch). Pin 1 is GND, Pin 2 is RESET (push-pull active-low), and Pin 3 is VCC. The package is RoHS-compliant and tape-and-reel delivered.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground for internal comparator and reset logic; must be connected to system ground plane |
| 2 | RESET | Push-pull active-low output; sinks 15µA at VCC ≥ 0.55V - directly interfaces µP reset input without pullup |
| 3 | VCC | Monitored supply input and power source; also used as reference for reset comparator and MR pullup |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.05V threshold | Eliminates external resistor divider and calibration, reducing BOM count and layout area |
| 210ms fixed reset timeout | Guarantees µP reset pulse width exceeds minimum requirement of most ARM Cortex-M0/M3 and RISC-V cores |
| 7.5µA supply current | Enables continuous monitoring in coin-cell-powered IoT sensors with >5-year shelf life |
| SC70-3 package | Reduces board area by >60% vs. SOT-23-3 while maintaining compatible reflow profile |
| VCC = 0.55V reset validity | Ensures deterministic reset state even during severe brownout - no floating or undefined output |
Applications
| Wearable Health Monitor | Industrial Sensor Node |
|---|---|
Use Scenario: Continuous ECG sampling powered by CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Voltage detector asserting reset if battery drops below 1.05V, preventing corrupted ADC reads or flash writes during brownout. Use Value: Prevents data corruption and firmware lockup by guaranteeing clean µP restart before supply collapses below functional threshold. |
Use Scenario: Wireless vibration sensor mounted on rotating machinery, operating unattended for months. IC Role / Device Role / Timing Role: Supervisory circuit holding µC in reset until stable 1.05V LDO output is established post-power-up. Use Value: Ensures reliable boot sequence despite slow-ramping LDOs and long PCB trace inductance. |
| Low-Power Edge AI Module | Medical Implantable Diagnostic Tool |
Use Scenario: Sub-1V neural network accelerator IC powered from buck converter with tight regulation tolerance. IC Role / Device Role / Timing Role: Precision reset generator validating core supply integrity before enabling clock tree and memory initialization. Use Value: Avoids metastability in digital logic blocks caused by marginal VDD during power ramp. |
Use Scenario: Battery-backed diagnostic handheld with EEPROM storage and real-time clock. IC Role / Device Role / Timing Role: Brownout protector asserting reset when primary cell depletes below 1.05V, preserving stored calibration data. Use Value: Guarantees safe shutdown sequence and prevents partial write corruption in nonvolatile memory. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector and µP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6381XR24+T | 2.4V fixed threshold, 200ms timeout, SC70-3, 1.5µA ICC - higher threshold, lower current, same package | Designed for 2.5V I/O rails; not suitable for sub-1.2V core monitoring | Select when supervising 2.4V–2.6V supplies with ultra-low quiescent current priority |
| TLV803EB29DBZR | 2.93V threshold, 140ms timeout, SOT-23-3, 0.5µA ICC - higher voltage, smaller package, lower current | Targets 3.3V systems; lacks VCC = 0.55V reset validity and transient immunity specs | Choose for cost-sensitive 3V applications where minimal footprint and lowest ICC dominate |
Compared with MAX6832FXRD3+, MAX6381XR24+T offers lower current but cannot monitor sub-1.2V rails, while TLV803EB29DBZR reduces size and current but sacrifices brownout robustness and low-voltage validity - making MAX6832FXRD3+ uniquely suited for 1.05V core supervision in portable electronics.
Availability
MAX6832FXRD3+ is available at Aetrix Electronics and suitable for wearable health monitors, industrial sensor nodes, and low-power edge AI modules requiring stable component supply across extended production lifecycles.
Supply support for MAX6832FXRD3+ 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 is a semiconductor company specializing in analog and mixed-signal ICs for power management, sensing, and interface applications - acquired by Analog Devices in 2021.
The MAX6832–MAX6840 family was engineered specifically for ultra-low-voltage µP supervision in battery-constrained devices, delivering precision reset functionality in minimal SC70 footprints with guaranteed performance down to 0.55V.
FAQ
What is the exact reset threshold voltage of the MAX6832FXRD3+?
The MAX6832FXRD3+ has a factory-set reset threshold of 1.05V, with ±2.5% accuracy over the full operating temperature range (-40°C to +85°C). This value is confirmed in the Electrical Characteristics table under "Reset Threshold (VTH)" for suffix F, and applies directly to the MAX6832FXRD3+ without adjustment or external components.
Does the MAX6832FXRD3+ require an external pullup resistor on its RESET pin?
No, the MAX6832FXRD3+ features a push-pull active-low RESET output, meaning it actively drives both high and low states internally. Unlike open-drain variants, it does not require an external pullup resistor - simplifying design and reducing component count in space-constrained layouts.
What is the reset timeout period for the MAX6832FXRD3+?
The MAX6832FXRD3+ provides a fixed 210ms reset timeout period (D3 suffix), guaranteed over temperature and supply voltage. This duration begins when VCC rises above 1.05V and ends 210ms later - ensuring compatibility with µP reset timing requirements such as those specified in ARM CoreBoot and RISC-V OpenSBI specifications.
Can the MAX6832FXRD3+ operate with VCC below 1.0V?
Yes, the MAX6832FXRD3+ functions down to VCC = 0.55V and guarantees valid reset output (active-low) throughout that range. Below 0.55V, the RESET output becomes high-impedance, but the device remains functional as a detector - consistent with its specification for "reset valid to VCC = 0.55V" in the datasheet.
Is the MAX6832FXRD3+ pin-compatible with older Maxim reset ICs?
Yes, the MAX6832FXRD3+ is pin-compatible with the MAX809 series (e.g., MAX809R) and MAX6711–MAX6713 families in SC70-3 configuration. This allows drop-in replacement in existing designs without PCB modification, provided the reset threshold and timeout requirements align - verified via Maxim's official pin-compatibility statement in the datasheet.
MAX6832FXRD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6832FXRD3+ FAQ
1.How can I place an order for MAX6832FXRD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6832FXRD3+ 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 MAX6832FXRD3+ reliable?
The price and inventory of MAX6832FXRD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6832FXRD3+ is usually 5 days.
3.What payment methods are accepted for MAX6832FXRD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6832FXRD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6832FXRD3+?
MAX6832FXRD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6832FXRD3+ 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 MAX6832FXRD3+?
For technical support, including MAX6832FXRD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6832FXRD3+ requirements.
6.How does Aetrix verify that MAX6832FXRD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6832FXRD3+ 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 MAX6832FXRD3+ meets industry standards.
7.What is the process for return or replacement of MAX6832FXRD3+?
All MAX6832FXRD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6832FXRD3+, 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 MAX6832FXRD3+ part is unused and in its original packaging.
Return procedure for MAX6832FXRD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6832FXRD3+ Tags
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MIC826SYMT-TR
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