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Analog Devices Inc./Maxim Integrated MAX6832FXRD3+T
- Part No.:
- MAX6832FXRD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6832FXRD3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,083
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Product details
Overview
MAX6832FXRD3+T from Maxim Integrated is an ultra-low-voltage, 3-pin SC70 push-pull active-low voltage detector and µP 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, and 7.5µA typical supply current. The device asserts RESET when VCC falls below threshold or MR is pulled low, and holds reset for the full timeout after recovery - used in critical power-up sequencing for microcontrollers operating at sub-1.2V core voltages.
For engineers reviewing the MAX6832FXRD3+T datasheet, MAX6832FXRD3+T pinout, MAX6832FXRD3+T application, or MAX6832FXRD3+T equivalent, key selection criteria include guaranteed reset validity down to VCC = 0.55V, immunity to short negative VCC transients (<100ns), compatibility with 1.2V–1.8V nominal supplies, and direct integration into space-constrained SC70-3 footprints without external components.
Technical Context
The MAX6832FXRD3+T implements a precision bandgap-based voltage comparator with hysteresis (0.75% of VTH) to reject fast VCC transients and ensure glitch-free reset assertion. Its internal 20kΩ MR pullup enables momentary switch interfacing without external biasing, and the push-pull RESET output drives CMOS inputs directly without pullup resistors.
This variant belongs to the MAX6832–MAX6837 subgroup with fixed-threshold monitoring (no RESET-IN pin), uses the D3 timeout option (210ms), and shares pinout and functional behavior with MAX6832VXRD3 and MAX6832HXRD3 - differing only in threshold voltage (F = 1.05V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.05V ±2.5% over -40°C to +85°C - ensures reliable detection of brownout on 1.05V/1.1V logic rails |
| Reset Timeout Period | 210ms - provides sufficient hold time for slow-ramping digital systems during power-up |
| Supply Current | 7.5µA typical at +25°C - enables multi-year battery life in always-on monitoring applications |
| VCC Operating Range | 0.55V to 3.6V - guarantees reset assertion even during deep discharge of Li-ion cells |
| Reset Output Type | Push-pull active-low - eliminates need for external pullup and supports direct CMOS input drive |
| MR Input | Debounced manual reset with 20kΩ internal pullup - allows simple switch-to-ground interface without external RC |
| Propagation Delay | 60µs max (VCC falling) - ensures rapid response to supply collapse before system corruption |
Pinout & Package
MAX6832FXRD3+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm height), optimized for high-density PCB layouts in portable electronics. Pin 1 is GND, Pin 2 is RESET (push-pull active-low), and Pin 3 is VCC - no MR pin present in this variant (MAX6832 series excludes MR functionality per datasheet pin configuration table).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-low push-pull output; sinks current when asserted (0.15V max at 15µA), sources current when deasserted (≥0.8×VCC) |
| 3 | VCC | Monitored supply input and power source; operates from 0.55V to 3.6V; powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.05V threshold | Eliminates external resistor divider and calibration, reducing BOM count and layout area in 1.05V/1.1V systems |
| 210ms fixed timeout | Matches timing requirements of ARM Cortex-M0/M3 boot sequences and FPGA configuration cycles |
| 7.5µA supply current | Enables continuous monitoring in energy-harvesting nodes and coin-cell-powered sensors |
| SC70-3 footprint | Reduces board area by >50% vs. SOT-23-3 while maintaining reflow compatibility and thermal performance |
| Reset valid to 0.55V VCC | Ensures deterministic reset state during final battery discharge phase, preventing undefined MCU behavior |
Applications
| Battery-Powered Wearables | Low-Voltage Microcontroller Systems |
|---|---|
Use Scenario: Monitoring 1.05V core supply of an ARM Cortex-M0+ SoC in a smartwatch during LiPo discharge from 4.2V to 2.8V. IC Role / Device Role / Timing Role: Voltage detector and reset generator ensuring clean boot and brownout protection across full battery range. Use Value: Prevents firmware crash during 1.05V rail collapse; 210ms timeout aligns with SoC's internal POR delay specification. |
Use Scenario: Power sequencing for a 1.2V FPGA configuration flash and 1.05V logic core in a portable medical sensor. IC Role / Device Role / Timing Role: Primary supervisor asserting reset until both VCC rails stabilize above 1.05V with 210ms hold time. Use Value: Guarantees FPGA bitstream integrity by holding reset until core voltage settles within tolerance. |
| Energy-Harvesting Sensor Nodes | Industrial IoT Edge Controllers |
Use Scenario: Supervising output of a 1.1V DC-DC converter powered by piezoelectric energy harvester. IC Role / Device Role / Timing Role: Ultra-low-quiescent reset circuit enabling wake-up only when harvested energy exceeds operational threshold. Use Value: 7.5µA ICC extends usable runtime between harvest events; 1.05V threshold matches converter regulation point. |
Use Scenario: Reset coordination for dual-rail 1.05V/3.3V industrial controller where 1.05V core powers real-time processing unit. IC Role / Device Role / Timing Role: Dedicated core-rail supervisor providing independent reset assertion before I/O rail stabilization. Use Value: Enables staggered power-up sequence without requiring complex PMIC; SC70-3 fits tight spacing near processor. |
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 |
|---|---|---|---|
| MAX6832VXRD3+T | 1.575V reset threshold (V suffix), same SC70-3 package, identical 210ms timeout and 7.5µA ICC | Designed for 1.6V nominal supplies (e.g., older DSPs), not suitable for 1.05V/1.1V rails | Select only if system VCC nominal is ≥1.5V; incompatible with 1.05V operation due to higher trip point |
| MAX6832HXRD3+T | 1.313V reset threshold (H suffix), same package, timing, and current specs | Targeted at 1.3V logic families (e.g., certain ASICs); insufficient margin for 1.05V systems under temp/voltage drift | Use where 1.3V supply stability is required; does not meet 1.05V brownout detection requirement of MAX6832FXRD3+T |
Compared with MAX6832VXRD3+T and MAX6832HXRD3+T, the MAX6832FXRD3+T uniquely supports 1.05V supply monitoring with ±2.5% accuracy over temperature - making it the only valid choice for modern ultra-low-voltage microcontrollers and SoCs requiring precise brownout detection at the 1.05V node.
Availability
MAX6832FXRD3+T is available at Aetrix Electronics and suitable for battery-powered wearables, low-voltage microcontroller systems, and energy-harvesting sensor nodes requiring stable component supply with guaranteed long-term availability and RoHS-compliant lead-free packaging.
Supply support for MAX6832FXRD3+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, automotive, and consumer markets.
The MAX6832–MAX6840 family was developed specifically for ultra-low-voltage power monitoring in portable and battery-critical systems, addressing the need for sub-1.2V reset supervision with minimal quiescent current and SC70-level miniaturization.
FAQ
What is the exact reset threshold voltage of the MAX6832FXRD3+T and how accurate is it over temperature?
The MAX6832FXRD3+T has a factory-set reset threshold of 1.05V with ±2.5% accuracy over the full operating temperature range of -40°C to +85°C. This specification is guaranteed by design and confirmed in the Electrical Characteristics table of the official datasheet. The threshold remains stable due to integrated bandgap reference and hysteresis (0.75% of VTH), ensuring reliable brownout detection for 1.05V/1.1V supply rails across environmental conditions. No external calibration is required.
Does the MAX6832FXRD3+T include a manual reset (MR) input?
No, the MAX6832FXRD3+T does not include a manual reset (MR) input. As confirmed in the Pin Description section and Ordering Information table, only the MAX6835/MAX6836/MAX6837 variants (4-pin SC70-4) feature MR functionality. The MAX6832FXRD3+T is a 3-pin SC70-3 device with pins GND, RESET, and VCC - consistent with all MAX6832-series parts. Its reset is triggered solely by VCC falling below 1.05V.
What is the function of the RESET pin on the MAX6832FXRD3+T and what are its drive capabilities?
The RESET pin on the MAX6832FXRD3+T is a push-pull active-low output. When asserted, it sinks up to 15µA with a maximum VOL of 0.15V (at VCC ≥ 0.55V); when deasserted, it sources current with VOH ≥ 0.8×VCC. This eliminates the need for external pullup resistors and allows direct interfacing with standard CMOS inputs. The output remains valid down to VCC = 0.55V, ensuring deterministic behavior during deep battery discharge.
Can the MAX6832FXRD3+T be used to monitor supply voltages lower than 1.05V?
No, the MAX6832FXRD3+T cannot monitor voltages lower than its fixed 1.05V threshold. It is designed exclusively for nominal 1.05V systems. For sub-1.05V monitoring (e.g., 0.8V or 0.6V rails), the MAX6838/MAX6839/MAX6840 series with adjustable RESET-IN input and 444mV internal reference must be used instead. Attempting to use MAX6832FXRD3+T below 1.05V results in permanent reset assertion, as VCC will always be below threshold.
What timeout period is implemented in the MAX6832FXRD3+T and how is it selected?
The MAX6832FXRD3+T implements a 210ms reset active timeout period, indicated by the "D3" suffix in its part number. This value is factory-programmed and non-adjustable. The timeout begins when VCC rises above 1.05V and ends 210ms later, ensuring sufficient hold time for microcontroller initialization and memory stabilization. It is one of five fixed options (D0–D4) defined in Table 2 of the datasheet and is not user-configurable via external components.
MAX6832FXRD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.05V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6832FXRD3+T FAQ
1.How can I place an order for MAX6832FXRD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6832FXRD3+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 MAX6832FXRD3+T reliable?
The price and inventory of MAX6832FXRD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6832FXRD3+T is usually 5 days.
3.What payment methods are accepted for MAX6832FXRD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6832FXRD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6832FXRD3+T?
MAX6832FXRD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6832FXRD3+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 MAX6832FXRD3+T?
For technical support, including MAX6832FXRD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6832FXRD3+T requirements.
6.How does Aetrix verify that MAX6832FXRD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6832FXRD3+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 MAX6832FXRD3+T meets industry standards.
7.What is the process for return or replacement of MAX6832FXRD3+T?
All MAX6832FXRD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6832FXRD3+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 MAX6832FXRD3+T part is unused and in its original packaging.
Return procedure for MAX6832FXRD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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