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Analog Devices Inc./Maxim Integrated MAX6834WXRD0
- Part No.:
- MAX6834WXRD0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6834WXRD0.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,795
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Product details
Overview
MAX6834WXRD0 from Maxim Integrated is a low-voltage microprocessor supervisory circuit with open-drain active-low reset output, factory-set 1.665V reset threshold, 70µs timeout (D0 suffix), and guaranteed reset validity down to VCC = 0.55V. It monitors +1.2V to +1.8V supplies in portable and battery-powered systems, eliminating external components while ensuring reliable power-on reset during brownout conditions.
For engineers reviewing the MAX6834WXRD0 datasheet, MAX6834WXRD0 pinout, MAX6834WXRD0 application, or MAX6834WXRD0 equivalent, this device is selected for ultra-low-power embedded systems requiring precise voltage monitoring, bidirectional µP reset interface capability, and immunity to short VCC transients - especially where supply rail sequencing or multi-supply level-shifting reset signaling is needed.
Technical Context
The MAX6834WXRD0 implements a precision bandgap-based voltage comparator with ±2.5% threshold accuracy over –40°C to +85°C, paired with a fixed 70µs reset timeout (D0 option) optimized for voltage detection rather than full power-up delay. Its open-drain RESET output requires an external pullup and supports interfacing with bidirectional µP reset pins or level-shifting across different supply domains.
It operates from VCC = 0.55V to 3.6V, draws only 7.5µA typical supply current at 1.2V, and features internal immunity to fast negative VCC transients (e.g., <100ns glitches). Unlike push-pull variants, it does not include MR or RESET-IN inputs - this variant is dedicated to VCC-monitored reset with fixed threshold and minimal footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.665V ±2.5% - precisely matches 1.7V nominal core supplies; ensures reset assertion before logic corruption at 1.2V–1.8V rails |
| Reset Timeout Period | 70µs - voltage-detection mode; enables fast fault response without delaying system boot sequence |
| Supply Current | 7.5µA (typ) at VCC = 1.2V - enables multi-year operation in coin-cell–powered IoT sensors and wearables |
| Minimum Valid VCC | 0.55V - guarantees RESET remains asserted and valid even during deep brownout or battery depletion |
| Output Type | Open-drain active-low - allows wired-OR reset bus, level-shifting to higher voltage domains (e.g., 3.3V/5V), and direct interface with bidirectional µP reset I/O |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive under-hood auxiliary modules |
| Package | 3-pin SC70 - 2.0mm × 2.1mm footprint; compatible with high-density PCB layouts and reflow assembly |
Pinout & Package
MAX6834WXRD0 is housed in a 3-pin SC70 package (2.0mm × 2.1mm, 0.5mm pitch), optimized for space-constrained portable designs. Pin 1 is GND, Pin 2 is RESET (open-drain active-low), and Pin 3 is VCC. No manual reset (MR) or RESET-IN pins are present - this variant is strictly VCC-monitored with factory-trimmed threshold.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be low-impedance connection to system ground plane |
| Pin 2 (RESET) | Open-drain active-low reset output | Sinks current when asserted; requires external pullup resistor (typically 10kΩ–100kΩ) to target logic rail (e.g., 1.8V, 3.3V, or 5V) |
| Pin 3 (VCC) | Supply and monitored voltage input | Both powers the IC and serves as the monitored rail; valid operation starts at 0.55V; no internal regulation |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.665V threshold | Eliminates external resistor divider; reduces BOM count and layout area for 1.7V core supplies |
| 70µs reset timeout | Enables rapid fault detection without compromising boot timing - ideal for voltage glitch monitoring |
| 7.5µA supply current | Extends battery life in always-on monitoring applications such as smart meters and medical patches |
| ±2.5% threshold accuracy over temperature | Ensures consistent reset behavior across –40°C to +85°C without calibration or trimming |
| Open-drain output with 0.2V VOL @ 200µA | Provides clean low-state drive into diverse logic families and enables shared reset bus architecture |
Applications
| Battery-Powered Sensor Node | Low-Voltage Microcontroller System |
|---|---|
|
Use Scenario: A coin-cell–powered environmental sensor node wakes periodically to sample and transmit data, relying on stable reset during shallow discharge cycles. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET until VCC rises above 1.665V with 70µs detection latency - preventing firmware execution during marginal supply. Use Value: Guarantees deterministic startup at end-of-battery life (down to 0.55V VCC), extending usable operating range by ~15% versus higher-threshold supervisors. |
Use Scenario: An ARM Cortex-M0+ MCU powered from a 1.65V LDO in a wearable health monitor, where supply ripple and thermal drift demand tight reset control. IC Role / Device Role / Timing Role: Dedicated VCC monitor providing open-drain RESET signal that interfaces directly with the MCU's bidirectional reset pin via single pullup. Use Value: Enables hardware-level reset coordination between MCU and companion PMIC without additional logic or level shifters. |
| Industrial PLC I/O Module | DC-DC Converter Monitoring |
|
Use Scenario: A DIN-rail mounted programmable logic controller module with isolated 1.8V FPGA configuration rail subject to EMI-induced dips. IC Role / Device Role / Timing Role: Immune-to-glitch supervisor detecting sub-100ns VCC transients and holding RESET asserted for 70µs after recovery. Use Value: Prevents FPGA configuration corruption during switching noise events, reducing field failure rate by eliminating spurious resets. |
Use Scenario: A point-of-load DC-DC converter supplying 1.7V to an ASIC, requiring independent validation of output stability before enabling downstream logic. IC Role / Device Role / Timing Role: Monitors converter output directly at VCC pin; open-drain RESET pulled to 3.3V logic domain signals "good output" to host controller. Use Value: Provides rail-specific power-good signaling with level-shifted compatibility - no optocoupler or additional buffer required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6832WXRD0 | Push-pull active-low RESET output; same 1.665V threshold and D0 timeout; no external pullup required | Used where board space permits simpler routing and no level shifting is needed | Select when driving CMOS inputs directly and avoiding pullup resistors saves layout complexity |
| MAX6381XR24+ | 1.63V threshold, 200ms timeout (R24), SOT23-3 package; higher quiescent current (12µA) | Targeted at systems needing longer reset hold time for slow-ramping supplies | Choose when extended power-up stabilization is required and 200ms timeout better matches system boot profile |
Compared with MAX6834WXRD0, MAX6832WXRD0 simplifies design by removing the pullup requirement but loses level-shifting flexibility; MAX6381XR24+ trades ultra-fast 70µs response for robustness against slow supply ramp-up, making it suitable for non-portable industrial controllers.
Availability
MAX6834WXRD0 is available at Aetrix Electronics and suitable for battery-powered equipment, low-voltage microcontroller systems, and industrial I/O modules requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6834WXRD0 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 communications markets.
The MAX6832–MAX6840 family was developed specifically for ultra-low-voltage microprocessor supervision in space- and power-constrained systems, emphasizing minimal external components, wide VCC operating range, and transient immunity.
FAQ
What is the reset threshold voltage of the MAX6834WXRD0?
The MAX6834WXRD0 has a factory-set reset threshold of 1.665V with ±2.5% accuracy over –40°C to +85°C. This value is fixed and unadjustable - it is trimmed during wafer test and corresponds to the 'W' suffix in the part number. The threshold ensures reliable reset assertion before logic instability occurs on 1.7V nominal core supplies.
Does the MAX6834WXRD0 include a manual reset (MR) input?
No, the MAX6834WXRD0 does not include a manual reset (MR) input. It is a 3-pin SC70 device with only GND, RESET (open-drain), and VCC terminals. MR functionality is present only on 4-pin variants like MAX6835/MAX6836/MAX6837. For manual reset capability with the same threshold and timeout, consider MAX6835WXSD0 instead.
What pullup resistor value is recommended for the MAX6834WXRD0 RESET output?
A 10kΩ to 100kΩ pullup resistor is recommended for the MAX6834WXRD0 RESET output, depending on rise-time requirements and bus loading. For standard 1.8V logic, 47kΩ provides optimal tradeoff between speed and current draw. The pullup may connect to any voltage up to 6V, enabling level-shifting - e.g., pulling RESET to 3.3V while monitoring a 1.65V VCC rail.
Can the MAX6834WXRD0 operate below 1.2V?
Yes, the MAX6834WXRD0 operates down to VCC = 0.55V and guarantees valid RESET assertion at that level. Its internal circuitry remains functional and the open-drain output continues sinking current until VCC drops below 0.55V. This makes it suitable for deep brownout detection in lithium-thionyl chloride or primary alkaline battery applications.
Is the MAX6834WXRD0 pin-compatible with other devices in the MAX6832–MAX6840 family?
The MAX6834WXRD0 shares the same 3-pin SC70 package and pinout (GND–RESET–VCC) with MAX6832/MAX6833 variants, but differs electrically: MAX6832 has push-pull active-low RESET, MAX6833 has push-pull active-high RESET, while MAX6834WXRD0 uses open-drain active-low. Direct replacement requires verifying output topology and pullup requirements in the target circuit.
MAX6834WXRD0 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:
- Open Drain or Open Collector
- 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
MAX6834WXRD0 FAQ
1.How can I place an order for MAX6834WXRD0 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6834WXRD0 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 MAX6834WXRD0 reliable?
The price and inventory of MAX6834WXRD0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6834WXRD0 is usually 5 days.
3.What payment methods are accepted for MAX6834WXRD0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6834WXRD0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6834WXRD0?
MAX6834WXRD0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6834WXRD0 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 MAX6834WXRD0?
For technical support, including MAX6834WXRD0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6834WXRD0 requirements.
6.How does Aetrix verify that MAX6834WXRD0 is sourced from the original manufacturer or authorized distributors?
All MAX6834WXRD0 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 MAX6834WXRD0 meets industry standards.
7.What is the process for return or replacement of MAX6834WXRD0?
All MAX6834WXRD0 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6834WXRD0, 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 MAX6834WXRD0 part is unused and in its original packaging.
Return procedure for MAX6834WXRD0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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