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Analog Devices Inc./Maxim Integrated MAX6834FXRD3
- Part No.:
- MAX6834FXRD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6834FXRD3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,614
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Product details
Overview
MAX6834FXRD3 from Maxim Integrated is an ultra-low-voltage microprocessor supervisory circuit with open-drain active-low reset output, designed for monitoring +1.2V to +1.8V power supplies in portable and embedded systems. It features a factory-set 1.050V reset threshold (±2.5% over temperature), 210ms reset timeout period (D3 suffix), and 7.5µA typical supply current. Used to ensure reliable µP startup and brownout protection in battery-powered instrumentation.
For engineers reviewing the MAX6834FXRD3 datasheet, MAX6834FXRD3 pinout, MAX6834FXRD3 application, or MAX6834FXRD3 equivalent, key selection considerations include its SC70-3 open-drain RESET output requiring external pullup, VCC-operated reset detection down to 0.55V, immunity to short VCC transients, and compatibility with bidirectional µP reset pins.
Technical Context
The MAX6834FXRD3 implements a precision voltage comparator with 444mV internal reference and hysteresis of 0.75% of VTH to reject noise and fast transients on VCC. Its reset assertion logic triggers when VCC falls below the 1.050V threshold and holds RESET low for exactly 210ms after VCC recovers above threshold.
As a member of the MAX6832–MAX6840 family, it uses BiCMOS process (681 transistors) and operates across –40°C to +85°C. Unlike variants with MR or RESET-IN inputs, MAX6834FXRD3 has no manual reset or adjustable threshold capability - it monitors only VCC directly with fixed threshold and timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.050V ±2.5% over –40°C to +85°C - ensures accurate brownout detection for 1.2V systems |
| Reset Timeout Period | 210ms - guarantees sufficient hold time for µP initialization after power recovery |
| Supply Current | 7.5µA typical at +25°C - enables multi-year battery life in portable equipment |
| Operating Voltage Range | +0.55V to +3.6V - supports valid reset assertion even during deep brownout (down to 0.55V) |
| Output Type | Open-drain active-low RESET - allows level-shifting and wired-OR with other reset sources |
| Package | 3-pin SC70 - 2.0mm × 2.1mm footprint ideal for space-constrained PCBs |
| Reset Propagation Delay | 60µs max (VCC falling) - fast response to supply collapse without false triggering |
Pinout & Package
MAX6834FXRD3 is housed in a 3-pin SC70 package (2.0mm × 2.1mm, 0.5mm pitch). The device has no manual reset or RESET-IN input - only VCC monitoring.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage |
| 2 | RESET | Open-drain active-low output - requires external pullup resistor to define high level |
| 3 | VCC | Monitored supply input and device power source - reset asserted when VCC < 1.050V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.050V threshold | Eliminates external resistor networks and calibration for 1.2V system monitoring |
| 210ms fixed timeout (D3) | Meets JEDEC JESD76 requirements for µP reset hold time without timing component |
| 7.5µA supply current | Reduces quiescent power in always-on monitoring circuits by >90% vs. legacy reset ICs |
| SC70-3 package | Enables placement adjacent to µP in high-density portable PCB layouts |
| Open-drain RESET output | Supports bidirectional reset arbitration and voltage-level translation up to 6V |
Applications
| Battery-Powered IoT Sensor Node | Low-Voltage FPGA Configuration Monitor |
|---|---|
|
Use Scenario: A coin-cell-powered environmental sensor node must maintain reliable µC reset during voltage sag caused by RF transmission bursts. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to the µC's dedicated reset pin during VCC dips below 1.050V. Use Value: 210ms timeout prevents spurious resets from transient sags while ensuring full µC reinitialization after sustained brownout. |
Use Scenario: An FPGA-based industrial controller powered from a 1.2V core rail requires guaranteed configuration validity after cold start. IC Role / Device Role / Timing Role: Voltage detector holding FPGA PROG_B low until 1.2V rail stabilizes above 1.050V for ≥210ms. Use Value: Open-drain output interfaces directly to FPGA's active-low PROG_B with shared 3.3V pullup, eliminating level-shifter IC. |
| Wearable Medical Diagnostic Module | Ultra-Low-Power Microcontroller Subsystem |
|
Use Scenario: A wearable ECG patch uses a 1.3V LDO to power its analog front-end and µC; supply must be validated before signal acquisition begins. IC Role / Device Role / Timing Role: Reset supervisor enabling µC clock and ADC peripherals only after stable 1.3V rail is confirmed. Use Value: 7.5µA quiescent current extends single-charge battery life beyond 12 months in standby mode. |
Use Scenario: A sub-1V logic subsystem in a multi-rail SoC platform requires independent reset sequencing for its 1.2V domain. IC Role / Device Role / Timing Role: Dedicated reset generator for isolated 1.2V logic block, decoupled from main system reset tree. Use Value: SC70-3 footprint allows local placement near the 1.2V regulator, minimizing trace inductance and noise coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6381XR24-T | Push-pull active-low RESET, same 1.05V threshold and 210ms timeout, but 4-pin SC70 package with MR input | Requires MR handling and occupies larger board area; not drop-in due to extra pin and different pinout | Select if manual reset capability or higher drive strength (push-pull) is required |
| TPS3123E10DBVR | 1.0V threshold, 200ms timeout, SOT-23-3 package, 1.5µA supply current - lower IQ but tighter threshold tolerance (±0.5%) | Lower threshold limits use to sub-1.1V systems; lacks VCC = 0.55V guaranteed operation | Select for ultra-low-power applications where 1.0V trip point suffices and extended brownout margin is not needed |
Compared with MAX6834FXRD3, MAX6381XR24-T adds manual reset functionality at the cost of layout complexity and non-pin-compatibility, while TPS3123E10DBVR trades brownout robustness (0.55V operation) and noise immunity for lower quiescent current and tighter threshold accuracy - making each suitable for distinct low-voltage supervision priorities.
Availability
MAX6834FXRD3 is available at Aetrix Electronics and suitable for battery-powered IoT sensors, wearable medical devices, and low-voltage FPGA configuration monitoring requiring stable component supply and long-term lifecycle support.
Supply support for MAX6834FXRD3 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, sensing, and interface applications in industrial, automotive, and consumer markets.
The MAX6832–MAX6840 product line delivers ultra-low-voltage supervisory circuits optimized for portable and energy-sensitive systems operating from 1.2V to 1.8V rails, emphasizing minimal quiescent current and compact packaging.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6834FXRD3?
The MAX6834FXRD3 has a factory-set reset threshold of 1.050V with ±2.5% accuracy over the full operating temperature range (–40°C to +85°C). This value is specified in the Electrical Characteristics table under "Reset Threshold (VTH)" for suffix F, and is guaranteed by design - not production-tested at temperature extremes. The threshold remains stable due to internal 444mV reference and trimming.
Does MAX6834FXRD3 support manual reset (MR) or external threshold adjustment?
No, MAX6834FXRD3 does not include manual reset (MR) or RESET-IN functionality. It is a VCC-only monitoring device with fixed 1.050V threshold and 210ms timeout. MR is present only on MAX6835/MAX6836/MAX6837 variants, and RESET-IN is exclusive to MAX6838/MAX6839/MAX6840. The MAX6834FXRD3 pinout contains only GND, RESET, and VCC.
What pullup resistor value is recommended for the open-drain RESET output of MAX6834FXRD3?
A 10kΩ to 100kΩ pullup resistor is typical for the MAX6834FXRD3 open-drain RESET output. Lower values (e.g., 10kΩ) improve noise immunity and rise time but increase static current; higher values (e.g., 100kΩ) minimize current draw but may slow edge rates. The device sinks up to 200µA at VCC ≥ 1.5V, so 47kΩ to VCC is a robust default choice for most 1.2V–3.3V systems.
Can MAX6834FXRD3 operate and assert reset when VCC drops below 1.0V?
Yes, MAX6834FXRD3 guarantees valid reset assertion down to VCC = 0.55V. Its internal circuitry remains functional and drives RESET low reliably in this range. Below 0.55V, the output transitions to high-impedance - but since most µPs are nonfunctional below ~0.6V, this behavior aligns with system-level requirements. No external pulldown is needed unless RESET must remain defined at 0V.
Is MAX6834FXRD3 pin-compatible with older Maxim reset ICs like MAX809 or MAX6712?
No, MAX6834FXRD3 is not pin-compatible with MAX809 (SOT-23-3, push-pull) or MAX6712 (SOT-23-5). It uses a 3-pin SC70 package with GND/RESET/VCC ordering, whereas MAX809 places RESET on pin 1. While functionally similar as voltage supervisors, physical layout and output drive type differ - MAX6834FXRD3 requires open-drain handling and cannot substitute without PCB revision.
MAX6834FXRD3 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
MAX6834FXRD3 FAQ
1.How can I place an order for MAX6834FXRD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6834FXRD3 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 MAX6834FXRD3 reliable?
The price and inventory of MAX6834FXRD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6834FXRD3 is usually 5 days.
3.What payment methods are accepted for MAX6834FXRD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6834FXRD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6834FXRD3?
MAX6834FXRD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6834FXRD3 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 MAX6834FXRD3?
For technical support, including MAX6834FXRD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6834FXRD3 requirements.
6.How does Aetrix verify that MAX6834FXRD3 is sourced from the original manufacturer or authorized distributors?
All MAX6834FXRD3 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 MAX6834FXRD3 meets industry standards.
7.What is the process for return or replacement of MAX6834FXRD3?
All MAX6834FXRD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6834FXRD3, 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 MAX6834FXRD3 part is unused and in its original packaging.
Return procedure for MAX6834FXRD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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