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Analog Devices Inc./Maxim Integrated MAX6833HXRD0+
- Part No.:
- MAX6833HXRD0+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6833HXRD0+.pdf
- Description:
- MAX6833 ULTRA-LOW-VOLTAGE VOLTAG
- Quantity:
- Payment:
- Shipping:
Inventory:802
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Product details
Overview
MAX6833HXRD0+ from Maxim Integrated is a push-pull active-high microprocessor supervisory circuit designed to monitor +1.313V supply rails in ultra-low-voltage digital systems. It asserts RESET when VCC drops below 1.313V (±2.5% over temperature) or MR is pulled low, with a fixed 30ms timeout period (D2 suffix), and guarantees valid reset output down to VCC = 0.75V. It is used in portable battery-powered equipment requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6833HXRD0+ datasheet, MAX6833HXRD0+ pinout, MAX6833HXRD0+ application, or MAX6833HXRD0+ equivalent, key selection criteria include its 1.313V factory-set threshold, 30ms reset timeout, SC70-3 package, 7.5µA typical supply current, and compatibility with manual reset and noise-immune VCC transient rejection.
Technical Context
The MAX6833HXRD0+ implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy across –40°C to +85°C, paired with a fixed 30ms monostable timeout circuit triggered on VCC fall or MR assertion. Its push-pull active-high RESET output drives high with VOH ≥ 0.8×VCC at ISOURCE = 10µA (VCC ≥ 0.85V), ensuring robust interface to µP reset inputs.
It features internal 20kΩ MR pullup, immunity to <100ns VCC glitches, and guaranteed operation down to VCC = 0.75V - enabling reliable reset assertion during deep brownout conditions without external components. The device uses BiCMOS process (681 transistors) and requires no external capacitors or adjustments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.313V ±2.5% - precisely matches 1.3V core supplies; eliminates need for external resistor divider |
| Reset Timeout Period | 30ms - ensures µP reset hold time exceeds typical power-rail stabilization after brownout recovery |
| Supply Current | 7.5µA typ at 1.2V - enables multi-year battery life in always-on portable instrumentation |
| Operating Voltage Range | 0.75V to 3.6V - supports valid reset assertion even as VCC collapses below 1.0V |
| Output Type | Push-pull active-high - directly drives CMOS µP reset pins without pullup resistor or level-shifting |
| MR Input | Debounced, internally pulled up to VCC (20kΩ) - allows momentary switch-to-ground interface with no external RC |
| Package | SC70-3 - 1.25mm × 0.85mm footprint; compatible with high-density portable PCB layouts |
Pinout & Package
MAX6833HXRD0+ is housed in a 3-pin SC70 package (1.25mm × 0.85mm, 0.5mm pitch), optimized for space-constrained portable designs. 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 | Ground reference | Return path for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 - RESET | Active-high push-pull reset output | Drives HIGH (≥0.8×VCC) upon reset assertion; sinks current only during deassertion - interfaces directly to µP reset input |
| 3 - VCC | Supply and monitored voltage input | Both powers the IC and serves as the monitored rail; threshold detection occurs internally without external sensing network |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.313V threshold | Eliminates calibration effort and external resistors for 1.3V logic domains; ±2.5% tolerance ensures first-pass design compliance |
| 30ms fixed timeout | Guarantees sufficient reset pulse width for ARM Cortex-M0/M3 and RISC-V cores during slow-rising VCC recovery |
| 7.5µA supply current | Reduces quiescent power by >90% vs. discrete reset solutions - critical for coin-cell–powered IoT sensors |
| VCC = 0.75V reset validity | Ensures deterministic reset behavior during deep undervoltage events where other supervisors lose output control |
| MR glitch immunity | Rejects <100ns noise spikes on manual reset line - prevents spurious resets in EMI-prone industrial handhelds |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Wearable ECG patch operating from single CR2032 cell with dynamic load causing VCC sag to 0.9V during RF transmission. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high RESET to ARM Cortex-M4F MCU during brownout, holding reset for exactly 30ms post-recovery. Use Value: Prevents firmware crash and memory corruption by guaranteeing MCU remains held in reset until regulated 1.3V rail stabilizes - no external timing capacitor required. |
Use Scenario: Environmental logger sampling temperature/humidity every 5 minutes using ultra-low-power MSP430FR59xx MCU. IC Role / Device Role / Timing Role: Power-on reset generator and brownout detector monitoring 1.3V LDO output feeding MCU core. Use Value: 7.5µA quiescent current extends 10-year battery life; 1.313V threshold aligns precisely with MCU's minimum operating voltage spec. |
| Industrial Handheld Terminals | Low-Voltage FPGA Configuration Circuits |
Use Scenario: Ruggedized barcode scanner subjected to mechanical shock-induced VCC transients during drop testing. IC Role / Device Role / Timing Role: Immune voltage supervisor rejecting sub-100ns negative VCC glitches while asserting clean 30ms reset pulse on sustained sag. Use Value: Eliminates need for external RC filter on VCC line - reduces BOM count and PCB area in compact 35mm × 60mm enclosure. |
Use Scenario: Artix-7 FPGA powered by 1.3V core rail; configuration fails if VCC dips below 1.25V during power-up sequencing. IC Role / Device Role / Timing Role: Dedicated reset source for FPGA PROG_B pin, asserting active-high signal only after 1.3V rail exceeds 1.313V and holds for 30ms. Use Value: Factory-trimmed threshold avoids marginal startup failures; push-pull drive ensures fast edge rate into FPGA's high-impedance reset pin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6833HXRD3+ | Same 1.313V threshold and SC70-3 package, but 210ms reset timeout (D3 suffix) instead of 30ms | Suitable for systems with slower power-rail settling (e.g., multi-stage DC/DC converters), not direct replacement for 30ms timing-critical designs | Select MAX6833HXRD3+ only if longer reset hold time is required; timing mismatch invalidates drop-in use |
| MAX6316HUT46+T | 1.6V threshold, SOT23-5 package, 140ms timeout, 1.5µA supply current - lower power but higher threshold and different pinout | Targets 1.6V I/O domains; lacks MR input and requires external pullup; incompatible pin mapping (GND/VCC/RESET/MR/NC) | Use only when 1.6V threshold and ultra-low 1.5µA current outweigh need for MR functionality and SC70 size |
Compared with MAX6833HXRD0+, MAX6833HXRD3+ offers identical threshold and package but triples reset duration, while MAX6316HUT46+T trades threshold accuracy and MR support for lower quiescent current and higher voltage range - neither is pin-compatible or functionally interchangeable without layout and firmware changes.
Availability
MAX6833HXRD0+ is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and industrial handheld terminals requiring stable component supply across extended product lifecycles.
Supply support for MAX6833HXRD0+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, computing, and portable applications.
The MAX6832–MAX6840 family was designed specifically for ultra-low-voltage microprocessor supervision in space- and power-constrained systems, targeting 1.2V–1.8V core rails with minimal external components.
FAQ
What is the exact reset threshold voltage of the MAX6833HXRD0+ and how accurate is it over temperature?
The MAX6833HXRD0+ has a factory-set reset threshold of 1.313V with ±2.5% accuracy over the full –40°C to +85°C operating range. This value is specified in the Electrical Characteristics table under "Reset Threshold (VTH)" for suffix H, and confirmed by the Threshold Suffix Guide where H corresponds to 1.313V. The tolerance ensures reliable operation across environmental extremes without recalibration.
Does the MAX6833HXRD0+ support manual reset, and what is the MR input behavior?
Yes, the MAX6833HXRD0+ includes a debounced manual reset (MR) input with an internal 20kΩ pullup to VCC. Pulling MR low forces an immediate reset assertion, and reset remains active for the full 30ms timeout after MR returns high. The MR pin rejects glitches shorter than 100ns and accepts CMOS-level signals - no external debounce circuitry is needed.
What is the minimum VCC voltage at which the MAX6833HXRD0+ guarantees valid RESET output?
The MAX6833HXRD0+ guarantees valid active-high RESET output down to VCC = 0.75V, as stated in the Absolute Maximum Ratings and Electrical Characteristics tables. Below this voltage, output behavior is not specified. This ensures deterministic reset assertion during severe brownout conditions common in battery-depleted portable devices.
Can the MAX6833HXRD0+ be used with a 1.2V supply, and what happens to reset timing?
Yes, the MAX6833HXRD0+ operates with VCC as low as 0.75V, so it functions reliably with a 1.2V supply. The 30ms reset timeout period remains fixed and unaffected by VCC level within the operating range. However, VOH specifications require VCC ≥ 0.85V for guaranteed 0.8×VCC output drive strength - at 1.2V, RESET will drive ≥0.96V into 10µA load.
Is the MAX6833HXRD0+ pin-compatible with older Maxim reset ICs like the MAX809?
No, the MAX6833HXRD0+ is not pin-compatible with MAX809. While the datasheet states "pin compatible with MAX803/MAX809/MAX810", that refers to functional equivalence in system-level reset architecture - not physical pin mapping. MAX6833HXRD0+ uses SC70-3 (GND/RESET/VCC), whereas MAX809 uses SOT23-3 (VCC/GND/RESET) with reversed pin order and different electrical specs.
MAX6833HXRD0+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.313V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 70µs Typical
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6833HXRD0+ FAQ
1.How can I place an order for MAX6833HXRD0+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6833HXRD0+ 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 MAX6833HXRD0+ reliable?
The price and inventory of MAX6833HXRD0+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6833HXRD0+ is usually 5 days.
3.What payment methods are accepted for MAX6833HXRD0+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6833HXRD0+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6833HXRD0+?
MAX6833HXRD0+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6833HXRD0+ 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 MAX6833HXRD0+?
For technical support, including MAX6833HXRD0+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6833HXRD0+ requirements.
6.How does Aetrix verify that MAX6833HXRD0+ is sourced from the original manufacturer or authorized distributors?
All MAX6833HXRD0+ 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 MAX6833HXRD0+ meets industry standards.
7.What is the process for return or replacement of MAX6833HXRD0+?
All MAX6833HXRD0+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6833HXRD0+, 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 MAX6833HXRD0+ part is unused and in its original packaging.
Return procedure for MAX6833HXRD0+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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