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Analog Devices Inc./Maxim Integrated MAX6834HXRD0
- Part No.:
- MAX6834HXRD0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6834HXRD0.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,394
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Product details
Overview
MAX6834HXRD0 from Maxim Integrated is an ultra-low-voltage microprocessor supervisory circuit in a 3-pin SC70 package, featuring open-drain active-low RESET output, factory-set 1.313V reset threshold (H suffix), and 70µs timeout period (D0 suffix). It monitors +1.2V to +1.8V supplies, asserts reset during brownout or manual trigger, and guarantees valid reset down to VCC = 0.55V. Used for reliable power-on reset in portable battery-powered microcontroller systems.
For engineers reviewing the MAX6834HXRD0 datasheet, MAX6834HXRD0 pinout, MAX6834HXRD0 application, or MAX6834HXRD0 equivalent, this device delivers precise low-voltage supervision with minimal external components, open-drain flexibility for bidirectional µP reset I/O, and immunity to short VCC transients - critical for embedded system reliability and space-constrained designs.
Technical Context
The MAX6834HXRD0 implements a precision voltage comparator with ±2.5% threshold accuracy over –40°C to +85°C, referenced to an internal 444mV bandgap. Its reset assertion logic responds to VCC falling below 1.313V or MR pull-down, holding RESET low for exactly 70µs after recovery.
It uses BiCMOS process technology (681 transistors) and features a high-impedance MR input with 20kΩ internal pullup, 7.5µA typical supply current at 1.2V, and open-drain RESET capable of sinking 200µA at VCC ≥ 1.5V while tolerating pullup voltages up to 6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.313V ±2.5% - precisely matches 1.3V core supplies; ensures deterministic reset before logic corruption |
| Timeout Period | 70µs - functions as fast voltage detector; suitable for immediate fault response in high-speed digital systems |
| Supply Current | 7.5µA (typ) at 1.2V - enables multi-year battery life in always-on monitoring applications |
| Operating Voltage Range | 0.55V to 3.6V - guarantees reset validity even during deep brownout; supports operation down to near-zero VCC |
| RESET Output Type | Open-drain active-low - allows level-shifting, wired-OR with other supervisors, and direct interface to bidirectional µP reset pins |
| MR Input | Active-low with 20kΩ internal pullup - eliminates external resistor; accepts CMOS or open-drain logic; no debounce required |
| VCC Transient Immunity | Immune to <100ns negative glitches at 100mV overdrive - prevents spurious resets in noisy power environments |
Pinout & Package
MAX6834HXRD0 is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.9mm), optimized for space-constrained portable designs.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and reset comparator; must be low-impedance connection |
| 2 | RESET | Open-drain active-low output; requires external pullup (to VCC or higher voltage up to 6V); sinks 200µA minimum at VCC ≥ 1.5V |
| 3 | VCC | Monitored supply input (0.55V–3.6V); powers internal circuitry and sets operating range for reset detection |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.313V threshold (H suffix) | Eliminates external resistor network; ensures ±2.5% accuracy across temperature without calibration |
| 70µs reset timeout (D0 suffix) | Enables use as standalone voltage detector with sub-microsecond response - faster than standard reset ICs |
| Open-drain RESET with 6V-tolerant pullup | Supports level-shifting between 1.2V monitored rail and 3.3V/5V reset logic; enables shared reset bus architectures |
| Valid reset assertion down to VCC = 0.55V | Guarantees clean reset signal throughout full power collapse - prevents metastability in µP startup sequence |
| 20kΩ internal MR pullup | Reduces BOM count; allows momentary switch-to-ground interface without external components or debounce circuitry |
Applications
| Portable Medical Sensors | Wearable Fitness Trackers |
|---|---|
|
Use Scenario: Continuous ECG monitoring powered by coin-cell battery with 1.2V LDO output. IC Role / Device Role / Timing Role: Supervises 1.2V core supply and triggers µP reset on voltage sag below 1.313V; 70µs timeout ensures rapid recovery after transient dip. Use Value: Prevents firmware lockup during battery voltage decay; open-drain RESET interfaces directly to bidirectional ARM Cortex-M0+ reset pin. |
Use Scenario: Bluetooth LE wristband with 1.3V SoC core rail and intermittent sensor activation. IC Role / Device Role / Timing Role: Monitors 1.3V supply and asserts reset if VCC drops during RF transmission surge; MR pin enables user-initiated firmware reload via button press. Use Value: 7.5µA quiescent current extends battery life beyond 6 months; SC70-3 footprint saves PCB area in 12mm × 12mm module. |
| Industrial IoT Edge Nodes | Low-Power Microcontroller Modules |
|
Use Scenario: Battery-backed environmental sensor node using 1.35V buck converter output for MCU and radio. IC Role / Device Role / Timing Role: Detects brownout on 1.35V rail and holds µP in reset until stable; RESET-IN not used - VCC-monitored mode selected. Use Value: ±2.5% threshold accuracy ensures consistent reset point across –40°C to +85°C operating range; immune to 100ns VCC glitches. |
Use Scenario: Modular MCU development board with selectable 1.2V/1.3V/1.5V core supply options. IC Role / Device Role / Timing Role: Provides standardized reset signaling across variants; open-drain output allows common RESET net shared with USB interface IC. Use Value: Pullup to 3.3V enables interoperability with legacy peripherals; 3-pin SC70 simplifies layout and reduces routing congestion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6834VXRD0 | 1.575V reset threshold (V suffix) vs. 1.313V (H suffix); same package, pinout, and D0 timeout | Targets 1.5V–1.6V supply rails instead of 1.3V; unsuitable for 1.2V systems requiring tighter margin | Select when supervising 1.5V logic or I/O supplies; verify threshold alignment with actual VCC nominal and tolerance |
| MAX6832HXRD0 | Push-pull active-low RESET (vs. open-drain); identical threshold, timeout, and SC70-3 package | Lacks level-shifting capability; cannot share RESET net with other open-drain devices or interface to bidirectional µP pins | Choose for simple single-supply systems where RESET only drives one µP; avoids need for external pullup resistor |
Compared with MAX6834HXRD0, MAX6834VXRD0 shifts reset threshold upward for higher-voltage rails, while MAX6832HXRD0 replaces open-drain flexibility with push-pull simplicity - both retain identical timing, package, and temperature performance but serve distinct system-level interface requirements.
Availability
MAX6834HXRD0 is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, and industrial IoT edge nodes requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6834HXRD0 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, with emphasis on high-reliability, low-power solutions.
The MAX6832–MAX6840 family was engineered specifically for ultra-low-voltage microprocessor supervision in battery-powered and space-constrained systems, delivering accurate reset generation with minimal external components.
FAQ
What is the exact reset threshold voltage of the MAX6834HXRD0?
The MAX6834HXRD0 has a factory-set reset threshold of 1.313V, with ±2.5% accuracy over the full –40°C to +85°C temperature range. This value is defined by the 'H' suffix in the part number and is verified per Maxim's Electrical Characteristics table. The MAX6834HXRD0 uses this fixed threshold to monitor VCC and assert RESET when voltage falls below 1.313V.
Does the MAX6834HXRD0 require an external pullup resistor on the RESET pin?
Yes, the MAX6834HXRD0 features an open-drain active-low RESET output and requires an external pullup resistor to function. The pullup may connect to VCC or any voltage up to 6V, enabling level-shifting. Typical values range from 10kΩ to 100kΩ depending on rise-time and bus loading requirements. Without this resistor, RESET remains floating and cannot drive logic-high states.
What is the purpose of the D0 suffix in MAX6834HXRD0?
The 'D0' suffix in MAX6834HXRD0 specifies a 70µs reset timeout period - the shortest option in the family. This makes the MAX6834HXRD0 suitable as a fast voltage detector rather than a general-purpose reset IC. After VCC rises above 1.313V or MR is released, RESET deasserts after precisely 70µs, enabling rapid system recovery in time-critical applications.
Can the MAX6834HXRD0 monitor supply voltages below 1.2V?
No - the MAX6834HXRD0 is configured for VCC-monitored operation with a fixed 1.313V threshold and is not designed to supervise sub-1.2V rails. For lower thresholds (e.g., 0.44V), Maxim offers the MAX6838–MAX6840 series with RESET-IN input. The MAX6834HXRD0 guarantees valid reset assertion only down to VCC = 0.55V, but its detection threshold remains fixed at 1.313V.
Is the MAX6834HXRD0 pin-compatible with older Maxim reset ICs like MAX809?
Yes, the MAX6834HXRD0 is explicitly stated as pin-compatible with the MAX803/MAX809/MAX810, MAX6711–MAX6713, and MAX6381–MAX6390 families in SC70-3 configuration. Its 3-pin SC70-3 footprint, GND–RESET–VCC pinout, and open-drain active-low RESET match these legacy parts, enabling drop-in replacement in existing layouts where 1.313V threshold and 70µs timeout meet design requirements.
MAX6834HXRD0 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:
- 70µs Typical
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6834HXRD0 FAQ
1.How can I place an order for MAX6834HXRD0 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6834HXRD0 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 MAX6834HXRD0 reliable?
The price and inventory of MAX6834HXRD0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6834HXRD0 is usually 5 days.
3.What payment methods are accepted for MAX6834HXRD0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6834HXRD0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6834HXRD0?
MAX6834HXRD0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6834HXRD0 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 MAX6834HXRD0?
For technical support, including MAX6834HXRD0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6834HXRD0 requirements.
6.How does Aetrix verify that MAX6834HXRD0 is sourced from the original manufacturer or authorized distributors?
All MAX6834HXRD0 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 MAX6834HXRD0 meets industry standards.
7.What is the process for return or replacement of MAX6834HXRD0?
All MAX6834HXRD0 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6834HXRD0, 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 MAX6834HXRD0 part is unused and in its original packaging.
Return procedure for MAX6834HXRD0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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