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Analog Devices Inc./Maxim Integrated MAX6834HXRD2+T
- Part No.:
- MAX6834HXRD2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6834HXRD2+T.pdf
- Description:
- IC MPU SUPERVISOR SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,164
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Product details
Overview
MAX6834HXRD2+T from Maxim Integrated is an ultra-low-voltage, open-drain active-low microprocessor reset circuit in SC70-3 package, designed to monitor +1.313V supply rails with ±2.5% threshold accuracy over temperature and assert reset for 30ms after VCC recovery or manual reset release. It features 7.5µA typical supply current and guarantees valid reset output down to VCC = 0.55V, enabling reliable power-on reset in portable battery-powered systems.
For engineers reviewing the MAX6834HXRD2+T datasheet, MAX6834HXRD2+T pinout, MAX6834HXRD2+T application, or MAX6834HXRD2+T equivalent, key selection considerations include its open-drain RESET output requiring external pullup, 30ms timeout period (D2 suffix), 1.313V factory-set threshold (H suffix), SC70-3 footprint compatibility, and immunity to short negative VCC transients.
Technical Context
The MAX6834HXRD2+T implements a precision voltage comparator with 444mV internal reference and hysteresis of 0.75% of VTH to reject fast VCC transients. Its reset assertion logic responds to VCC falling below 1.313V and holds RESET low for exactly 30ms after VCC rises above threshold or MR deasserts.
This device uses BiCMOS process technology (681 transistors) and operates across -40°C to +85°C with supply voltage range 0.55V to 3.6V. The open-drain RESET output supports level-shifting-pullup can connect to any voltage up to 6.0V independent of VCC, enabling interface with higher-voltage µP reset inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.313V ±2.5% over -40°C to +85°C - ensures accurate brownout detection for 1.3V-core systems |
| Reset Timeout Period | 30ms - provides sufficient hold time for µP initialization before release |
| Supply Current | 7.5µA typical at +25°C - enables multi-year battery life in always-on monitoring applications |
| Output Type | Open-drain active-low RESET - allows wired-OR configuration and level-shifting to higher voltage domains |
| VCC Operating Range | 0.55V to 3.6V - supports operation during deep brownout and compatibility with wide-input DC/DC converters |
| Reset Validity Limit | Guaranteed to VCC = 0.55V - maintains defined logic state down to near-zero supply voltage |
| MR Input | Active-low with 20kΩ internal pullup - eliminates external components for manual reset implementation |
Pinout & Package
MAX6834HXRD2+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm body height), compatible with standard SC70 land patterns and reflow soldering profiles. The package is RoHS-compliant (indicated by '+' suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and reset comparator; must be connected to system ground plane |
| 2 | RESET | Open-drain active-low output; requires external pullup resistor (typically 10–100kΩ) to VCC or higher voltage rail |
| 3 | VCC | Monitored supply input and power source; supplies internal bias and determines operating voltage range |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.313V threshold (H suffix) | Eliminates external resistor divider and calibration effort for 1.3V core supply monitoring |
| 30ms reset timeout (D2 suffix) | Matches typical µP power-up stabilization time without requiring external timing components |
| Open-drain RESET with 0.2V VOL @ 200µA | Ensures clean logic-low assertion even under heavy capacitive loading or mixed-voltage I/O interfaces |
| 7.5µA supply current | Reduces quiescent power in always-on supervisory functions-critical for coin-cell or energy-harvesting systems |
| Immunity to VCC transients ≤100ns | Prevents false resets caused by switching noise or ESD-induced supply glitches |
Applications
| Portable Medical Sensors | Industrial IoT Edge Nodes |
|---|---|
Use Scenario: Wearable glucose monitor powered by CR2032 coin cell with 1.3V LDO output. IC Role / Device Role / Timing Role: Voltage detector and power-on reset generator ensuring µC initializes only after stable 1.3V rail is established. Use Value: 7.5µA quiescent current extends battery life beyond 2 years; 30ms timeout aligns with BLE SoC wake-up sequence. |
Use Scenario: Battery-backed programmable logic controller (PLC) module monitoring 1.3V FPGA core supply. IC Role / Device Role / Timing Role: Brownout protection supervisor asserting reset when main 12V input drops and 1.3V DC/DC output collapses. Use Value: Open-drain RESET interfaces directly to FPGA's bidirectional reset pin via shared 3.3V pullup, eliminating level translators. |
| Automotive Body Control Modules | Low-Power Wireless Gateways |
Use Scenario: LIN bus node in door module using 1.3V MCU core supplied from automotive 5V rail via LDO. IC Role / Device Role / Timing Role: Reset circuit detecting undervoltage on 1.3V domain during cold-crank events (battery dip to 6V). Use Value: Guaranteed reset validity to VCC = 0.55V prevents undefined µC state during severe brownout; SC70-3 footprint saves PCB area. |
Use Scenario: Sub-GHz LoRaWAN gateway with dual-supply architecture: 1.3V RF transceiver core and 3.3V host MCU. IC Role / Device Role / Timing Role: Level-shifting reset generator-RESET pulled to 3.3V while monitoring 1.3V rail. Use Value: Enables single reset signal to coordinate startup of both voltage domains without separate supervisors or glue logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector and µP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809HTR | Push-pull active-low RESET, same 1.313V threshold and SC70-3 package, but fixed 140ms timeout (not 30ms) | Lacks open-drain flexibility; cannot level-shift or wire-OR with other reset sources | Select when push-pull drive is preferred and longer reset hold time is acceptable |
| TPS3808G13DBVR | Adjustable threshold via external resistor divider, 30ms timeout, SOT-23-5 package, 1.5µA supply current | Requires two external resistors for 1.313V setting; different pinout and larger footprint than SC70-3 | Select when ultra-low current dominates design priority and board space permits SOT-23-5 |
Compared with MAX809HTR, MAX6834HXRD2+T offers open-drain flexibility for multi-source reset arbitration; compared with TPS3808G13DBVR, it delivers identical 30ms timing in a smaller SC70-3 footprint but with fixed threshold and higher quiescent current.
Availability
MAX6834HXRD2+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6834HXRD2+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 product line delivers ultra-low-voltage supervisory circuits optimized for sub-1.8V digital systems, emphasizing minimal footprint, nanoscale quiescent current, and robust transient immunity in portable and battery-constrained applications.
FAQ
What is the exact reset threshold voltage of MAX6834HXRD2+T and how is it specified?
The MAX6834HXRD2+T has a factory-set reset threshold of 1.313V, with ±2.5% accuracy over the full operating temperature range (-40°C to +85°C). This value is defined by the 'H' suffix in the part number and is guaranteed by design-not just typical-per the Electrical Characteristics table in the datasheet. The threshold remains stable due to internal 444mV reference and matched comparator architecture.
Does MAX6834HXRD2+T require an external pullup resistor on the RESET pin, and why?
Yes, MAX6834HXRD2+T requires an external pullup resistor on the RESET pin because it features an open-drain active-low output. Without the pullup, RESET remains floating when not asserted. A typical value is 10–100kΩ connected to VCC or another logic-compatible voltage (up to 6.0V), enabling level-shifting and wired-OR reset architectures-key advantages over push-pull alternatives like MAX6832HXRD2+T.
What does the 'D2' suffix in MAX6834HXRD2+T indicate, and how is it implemented?
The 'D2' suffix in MAX6834HXRD2+T specifies a 30ms reset active timeout period-the duration RESET remains low after VCC rises above 1.313V or after manual reset (MR) is released. This timing is internally generated and factory-trimmed; no external capacitor or resistor is needed. It matches common µP initialization windows and is distinct from the 70µs (D0), 1.5ms (D1), 210ms (D3), or 1.68s (D4) options available in the family.
Can MAX6834HXRD2+T monitor supply voltages below 1.313V, such as 0.9V or 0.6V?
No-MAX6834HXRD2+T is factory-configured for 1.313V threshold only and cannot monitor lower voltages. For adjustable thresholds down to 0.44V, use MAX6838/MAX6839/MAX6840 variants with RESET-IN pin. Those parts accept external resistor dividers to set custom trip points, whereas MAX6834HXRD2+T's threshold is fixed and unchangeable. Attempting to use it below 1.313V results in permanent reset assertion.
Is MAX6834HXRD2+T pin-compatible with legacy Maxim reset ICs like MAX809 or MAX810?
No-MAX6834HXRD2+T is not pin-compatible with MAX809/MAX810. While both use SC70-3 packages, MAX809/MAX810 have VCC–GND–RESET pinout (1–2–3), whereas MAX6834HXRD2+T uses GND–RESET–VCC (1–2–3). Swapping them causes incorrect connections: GND would connect to VCC and vice versa. Always verify pin mapping using the "Pin Description" section on page 5 of the MAX6832–MAX6840 datasheet.
MAX6834HXRD2+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- 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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6834HXRD2+T FAQ
1.How can I place an order for MAX6834HXRD2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6834HXRD2+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 MAX6834HXRD2+T reliable?
The price and inventory of MAX6834HXRD2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6834HXRD2+T is usually 5 days.
3.What payment methods are accepted for MAX6834HXRD2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6834HXRD2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6834HXRD2+T?
MAX6834HXRD2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6834HXRD2+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 MAX6834HXRD2+T?
For technical support, including MAX6834HXRD2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6834HXRD2+T requirements.
6.How does Aetrix verify that MAX6834HXRD2+T is sourced from the original manufacturer or authorized distributors?
All MAX6834HXRD2+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 MAX6834HXRD2+T meets industry standards.
7.What is the process for return or replacement of MAX6834HXRD2+T?
All MAX6834HXRD2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6834HXRD2+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 MAX6834HXRD2+T part is unused and in its original packaging.
Return procedure for MAX6834HXRD2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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