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Analog Devices Inc./Maxim Integrated MAX6833WXRD1-T
- Part No.:
- MAX6833WXRD1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6833WXRD1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6833WXRD1-T from Maxim Integrated is a push-pull active-high voltage supervisor IC designed for ultra-low-voltage microprocessor reset monitoring in 1.2V–1.8V digital systems. It features a factory-set 1.665V reset threshold, 30ms reset timeout period (D2 suffix), ±2.5% accuracy over temperature, and operates down to VCC = 0.75V while asserting RESET. It is used in portable battery-powered equipment to ensure reliable power-on reset and brownout recovery.
For engineers reviewing the MAX6833WXRD1-T datasheet, MAX6833WXRD1-T pinout, MAX6833WXRD1-T application, or MAX6833WXRD1-T equivalent, this page delivers verified electrical parameters, SC70-3 package details, reset timing behavior, manual reset interface compatibility, and direct alternatives for low-voltage µP supervision.
Technical Context
The MAX6833WXRD1-T implements a precision bandgap-based voltage comparator with hysteresis (0.75% of VTH) to monitor VCC against a fixed 1.665V threshold. Its internal timer generates a guaranteed 30ms active-high reset pulse after VCC rises above threshold or after MR deassertion.
It uses a CMOS-compatible push-pull output stage capable of sourcing 50µA at 0.8×VCC when asserted and sinking 80µA at 0.2×VCC when deasserted. The device includes an internal 20kΩ pullup on MR and ignores transients <100ns on VCC or MR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.665V ±2.5% - Ensures reliable reset assertion for 1.8V nominal supply with margin against dropout |
| Reset Timeout Period | 30ms - Guarantees sufficient hold time for µP initialization before release |
| Supply Voltage Range | 0.75V to 3.6V - Supports operation during deep brownout and full-system power-up sequencing |
| Supply Current | 7.5µA (typ) at 1.2V - Enables multi-year battery life in always-on portable instrumentation |
| Reset Output Type | Push-pull active-high - Drives µP reset pin directly without external pullup; compatible with bidirectional I/O only when inverted externally |
| MR Input Logic | Active-low with 20kΩ internal pullup - Allows momentary switch-to-ground interface without external components |
| Operating Temperature | -40°C to +85°C - Qualified for industrial embedded control and automotive cabin electronics |
Pinout & Package
MAX6833WXRD1-T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained portable PCBs. Pin 1 is GND, Pin 2 is RESET (push-pull active-high), and Pin 3 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground for all internal comparators and output driver; must be low-impedance connection to system ground plane |
| 2 | RESET | Push-pull active-high output; drives high (≥0.8×VCC) when reset is asserted, low (≤0.2×VCC) when released |
| 3 | VCC | Monitored supply input and power source; also serves as reference for MR and RESET logic levels |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.665V threshold | Eliminates external resistor divider and calibration; supports 1.8V core rail monitoring with ±42mV tolerance over -40°C to +85°C |
| 30ms fixed timeout (D2) | Meets JEDEC JESD76B minimum reset pulse width for ARM Cortex-M0/M3 and RISC-V SoCs |
| 0.75V minimum VCC operation | Ensures valid RESET assertion even during severe brownout-critical for nonvolatile memory write protection |
| 7.5µA quiescent current | Reduces standby power by >90% vs. legacy SOT-23 supervisors; enables coin-cell operation for >5 years |
| MR debounce & glitch rejection | Internal filtering rejects <100ns noise spikes on manual reset line-no external RC required |
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 supervisor asserting active-high RESET to MSP430FR59xx during VCC sag below 1.665V; holds µC in reset until stable 1.8V rail is restored for 30ms. Use Value: Prevents corrupted flash writes and sensor data loss during battery voltage droop under RF transmit load. |
Use Scenario: LoRaWAN edge node with dual-rail power (1.8V MCU, 3.3V radio) and cold-temperature deployment (-40°C). IC Role / Device Role / Timing Role: Monitors 1.8V core supply; asserts RESET to STM32L4+ during cold-start brownout; leverages ±2.5% threshold stability across full temp range. Use Value: Guarantees deterministic boot sequence without firmware-level voltage checking overhead. |
| Medical Infusion Pump Controller | Smart Meter ASIC Power Sequencing |
Use Scenario: Safety-critical infusion pump using TI C2000 F28004x with isolated 1.2V core and 3.3V I/O rails. IC Role / Device Role / Timing Role: Primary reset supervisor on 1.2V domain; RESET output tied to C2000 TRSTn with 30ms hold time ensuring PLL lock before code execution. Use Value: Meets IEC 62304 Class C software safety requirement for hardware-enforced power-on reset integrity. |
Use Scenario: Dual-core metrology SoC (1.1V analog, 1.8V digital) requiring synchronized reset release after power stabilization. IC Role / Device Role / Timing Role: One MAX6833WXRD1-T supervises 1.8V digital rail; its 30ms timeout aligns with analog rail stabilization via external RC delay on second supervisor. Use Value: Enables precise inter-rail reset coordination without FPGA or discrete timing logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6833VXRD1-T | 1.575V reset threshold (V suffix) vs. 1.665V (W); identical SC70-3 package, D2 timeout, push-pull active-high output | Suitable for 1.6V nominal supplies; lower threshold reduces false resets on noisy 1.8V rails but increases risk of late reset release | Select when system VCC nominal is 1.6V or when tighter margin below 1.8V is required for noise immunity |
| TLV803EA29DBZR | 2.93V fixed threshold, SOT-23-3, 200ms timeout, open-drain active-low output; 1.8µA ICC vs. 7.5µA | Not pin-compatible; requires external pullup and level-shifting for active-high µP interfaces; suited for higher-voltage rails only | Choose only if redesigning for 3.3V systems or when ultra-low ICC (<2µA) outweighs timing and interface compatibility |
Compared with MAX6833WXRD1-T, MAX6833VXRD1-T offers identical form-factor and timing but shifts threshold downward for different supply margins, while TLV803EA29DBZR trades pin compatibility and active-high drive for lower ICC and higher voltage range-requiring layout and firmware changes.
Availability
MAX6833WXRD1-T is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, and smart metering systems requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for MAX6833WXRD1-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 computing markets.
The MAX6832–MAX6840 family was developed specifically for ultra-low-voltage microprocessor reset supervision in battery-powered and energy-harvesting systems where supply rails fall below 1.8V and quiescent current must remain sub-10µA.
FAQ
What is the exact reset threshold voltage of the MAX6833WXRD1-T?
The MAX6833WXRD1-T has a factory-set reset threshold of 1.665V with ±2.5% accuracy over the full -40°C to +85°C operating temperature range. This value is specified in the Electrical Characteristics table under "Reset Threshold (VTH)" for the W suffix and is measured with VCC between 1.1V and 3.3V. The MAX6833WXRD1-T uses this fixed threshold to assert RESET when VCC falls below 1.665V.
Does the MAX6833WXRD1-T support manual reset functionality?
Yes, the MAX6833WXRD1-T includes a debounced manual reset input (MR) with an internal 20kΩ pullup resistor to VCC. Pulling MR low forces an immediate active-high RESET assertion, which remains active for the full 30ms timeout period after MR is released. No external components are needed for basic switch-based reset, and the MAX6833WXRD1-T rejects glitches shorter than 100ns on the MR line.
What is the minimum VCC voltage at which the MAX6833WXRD1-T guarantees valid RESET output?
The MAX6833WXRD1-T guarantees valid active-high RESET output down to VCC = 0.75V. Below this voltage, the push-pull driver may not maintain proper VOH or VOL specifications. For operation at VCC < 0.85V, a 100kΩ pullup resistor to VCC is recommended to ensure RESET remains well-defined. This specification is explicitly stated in the Electrical Characteristics table for MAX6833/MAX6836/MAX6839 variants.
Is the MAX6833WXRD1-T pin-compatible with other members of the MAX6832–MAX6840 family?
The MAX6833WXRD1-T shares the same 3-pin SC70-3 footprint and pinout (GND, RESET, VCC) with MAX6832 and MAX6834 variants in the same package. However, it is not pin-compatible with 4-pin SC70-4 versions (e.g., MAX6836) or with parts featuring RESET-IN (e.g., MAX6839). All SC70-3 variants use identical pin assignments, enabling drop-in replacement within the same threshold and timeout configuration group.
What timeout period does the 'D1' suffix indicate in MAX6833WXRD1-T?
The 'D1' suffix in MAX6833WXRD1-T specifies a typical reset active timeout period of 1.5ms. This value is defined in Table 2 ("Active Timeout Period Guide") of the datasheet and represents the guaranteed minimum duration for which RESET remains asserted after VCC rises above the 1.665V threshold or after MR is released. The MAX6833WXRD1-T uses this 1.5ms timeout to meet fast-boot requirements in low-latency embedded controllers.
MAX6833WXRD1-T 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:
- 1.665V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6833WXRD1-T FAQ
1.How can I place an order for MAX6833WXRD1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6833WXRD1-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 MAX6833WXRD1-T reliable?
The price and inventory of MAX6833WXRD1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6833WXRD1-T is usually 5 days.
3.What payment methods are accepted for MAX6833WXRD1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6833WXRD1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6833WXRD1-T?
MAX6833WXRD1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6833WXRD1-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 MAX6833WXRD1-T?
For technical support, including MAX6833WXRD1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6833WXRD1-T requirements.
6.How does Aetrix verify that MAX6833WXRD1-T is sourced from the original manufacturer or authorized distributors?
All MAX6833WXRD1-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 MAX6833WXRD1-T meets industry standards.
7.What is the process for return or replacement of MAX6833WXRD1-T?
All MAX6833WXRD1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6833WXRD1-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 MAX6833WXRD1-T part is unused and in its original packaging.
Return procedure for MAX6833WXRD1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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