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Analog Devices Inc./Maxim Integrated MAX6834VXRD0+
- Part No.:
- MAX6834VXRD0+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6834VXRD0+.pdf
- Description:
- MAX6834 ULTRA-LOW-VOLTAGE VOLTAG
- Quantity:
- Payment:
- Shipping:
Inventory:2,781
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Product details
Overview
The MAX6834VXRD0+ 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 1.575V reset threshold (V suffix), and 1.5ms reset timeout (D1 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. It is used in portable battery-powered microcontroller systems requiring reliable power-on reset and immunity to short VCC transients.
For engineers reviewing the MAX6834VXRD0+ datasheet, MAX6834VXRD0+ pinout, MAX6834VXRD0+ application, or MAX6834VXRD0+ equivalent, key selection considerations include its open-drain RESET configuration for bidirectional µP interface, ±2.5% threshold accuracy over temperature, 7.5µA supply current, and compatibility with low-voltage core supplies in space-constrained embedded designs.
Technical Context
The MAX6834VXRD0+ implements a precision voltage comparator with 444mV internal reference, comparing VCC against a factory-trimmed threshold (1.575V) to detect undervoltage conditions. Reset assertion is latched and held for a fixed 1.5ms timeout after VCC recovers above threshold or MR deasserts.
Its open-drain RESET output requires an external pullup resistor-enabling level-shifting across supply domains-and supports interfacing with µPs having bidirectional reset I/O. The device includes internal MR pullup (20kΩ) and rejects <100ns glitches on MR, ensuring noise immunity without external debounce.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.575V ±2.5% over -40°C to +85°C - ensures accurate brownout detection for 1.6V nominal core supplies |
| Reset Timeout Period | 1.5ms - provides sufficient hold time for µP initialization before release |
| Supply Current | 7.5µA typical at 1.2V - enables multi-year battery life in always-on portable monitoring systems |
| VCC Operating Range | 0.55V to 3.6V - guarantees reset validity down to near-zero supply, critical for graceful shutdown |
| Output Type | Open-drain active-low RESET - allows wired-OR with other reset sources and level-shifting to higher-voltage logic rails |
| MR Input | Active-low with 20kΩ internal pullup - eliminates need for external resistor; accepts CMOS or open-drain drive |
| Reset Propagation Delay | 60µs max (VCC fall) - ensures fast response to supply collapse without false triggering on transients |
Pinout & Package
MAX6834VXRD0+ is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and reset comparator; must be low-impedance connection to system ground plane |
| 2 | RESET | Open-drain active-low output; requires external pullup resistor (typically 10–100kΩ) to VCC or alternate rail; sinks ≥15µA at VCC ≥ 0.55V |
| 3 | VCC | Monitored supply input and power source; operates from 0.55V to 3.6V; powers internal comparator and logic |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.575V threshold | Eliminates external resistor divider and calibration, reducing BOM count and layout area in 1.6V core systems |
| ±2.5% threshold accuracy over temperature | Ensures consistent reset point across industrial temperature range without derating margins |
| 1.5ms fixed timeout | Guarantees µP reset hold time meets minimum requirements of ARM Cortex-M0/M3 and similar low-power cores |
| 7.5µA supply current | Reduces quiescent power in always-on subsystems-e.g., RTC backup supervisors or sensor wake-up monitors |
| Immunity to <100ns MR glitches | Prevents spurious resets in noisy environments (e.g., motor-driven handheld tools or industrial HMI panels) |
Applications
| Portable Medical Sensors | Battery-Powered IoT Edge Nodes |
|---|---|
|
Use Scenario: Wearable ECG patch continuously monitors heart rhythm using ultra-low-power MCU and analog front-end, powered by coin-cell battery. IC Role / Device Role / Timing Role: MAX6834VXRD0+ supervises 1.5V LDO output powering the MCU core, asserting RESET during battery sag below 1.575V or user-initiated reboot. Use Value: Its 7.5µA quiescent current extends battery life beyond 2 years; open-drain RESET interfaces cleanly with the MCU's bidirectional reset pin without additional logic. |
Use Scenario: Sub-GHz LoRaWAN node samples environmental data every 5 minutes and transmits via RF module, operating from single AA alkaline cell. IC Role / Device Role / Timing Role: MAX6834VXRD0+ monitors the 1.6V buck converter output feeding the MCU and RF IC, holding reset until stable post-power-up and during brownout. Use Value: 1.5ms timeout ensures full clock stabilization and register initialization; ±2.5% threshold tolerance prevents premature reset release under temperature drift. |
| Industrial PLC I/O Modules | Low-Voltage FPGA Configuration Circuits |
|
Use Scenario: DIN-rail mounted digital input module uses 1.2V FPGA and 3.3V I/O buffer, powered from isolated DC/DC converter with variable load-induced ripple. IC Role / Device Role / Timing Role: MAX6834VXRD0+ supervises the 1.2V FPGA core rail, providing clean reset independent of 3.3V I/O domain fluctuations. Use Value: Open-drain RESET allows shared reset bus with other 1.2V devices; immunity to 60ns VCC transients avoids nuisance resets during relay switching noise. |
Use Scenario: FPGA-based test instrument configures on power-up using external SPI flash; configuration fails if core voltage drops during bitstream load. IC Role / Device Role / Timing Role: MAX6834VXRD0+ monitors the 1.5V FPGA core supply, asserting RESET until voltage stabilizes above 1.575V and holds for 1.5ms to cover configuration latency. Use Value: Guaranteed reset validity down to VCC = 0.55V ensures deterministic behavior during controlled power-down sequences, preventing partial configuration corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6381XR24+T | Push-pull active-low RESET; 2.4V threshold; 200ms timeout; SC70-3 package | Designed for 2.5V/3.3V systems-not suitable for sub-1.8V core monitoring | Select only when supervising higher-voltage rails where open-drain flexibility is unnecessary |
| TPS3808G15DBVR | Push-pull active-low RESET; 1.5V threshold; 200ms timeout; SOT-23-5 package; 1.6µA IQ | Larger footprint; lacks MR input; no adjustable timeout option | Prefer for ultra-low-IQ designs where 200ms timeout suffices and board space permits SOT-23-5 |
Compared with MAX6834VXRD0+, MAX6381XR24+T offers higher threshold and longer timeout but lacks open-drain flexibility for bidirectional reset buses, while TPS3808G15DBVR achieves lower quiescent current but sacrifices manual reset capability and timeout configurability-making MAX6834VXRD0+ optimal for compact, low-voltage, manually controllable reset systems.
Availability
MAX6834VXRD0+ is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT edge nodes, industrial PLC I/O modules, and low-voltage FPGA configuration circuits requiring stable component supply and long-term lifecycle support.
Supply support for MAX6834VXRD0+ 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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.
The MAX6832–MAX6840 product line delivers ultra-low-voltage supervisory circuits targeting space- and power-constrained microcontroller systems operating from 1.2V to 1.8V supplies.
FAQ
What is the reset threshold voltage of the MAX6834VXRD0+?
The MAX6834VXRD0+ has a factory-set reset threshold of 1.575V, with ±2.5% accuracy over the full operating temperature range (-40°C to +85°C). This value is specified in the Threshold Suffix Guide (V = 1.575V) and confirmed in the Electrical Characteristics table. The MAX6834VXRD0+ does not feature an adjustable RESET-IN pin-unlike MAX6840 variants-so the threshold is fixed and non-configurable.
Does the MAX6834VXRD0+ include a manual reset input (MR)?
No, the MAX6834VXRD0+ does not include a manual reset input. It belongs to the MAX6834/MAX6837/MAX6840 group, which features open-drain RESET but omits the MR pin. Only MAX6835/MAX6836/MAX6837 (4-pin SC70) and MAX6832/MAX6833/MAX6838 (3-pin SC70) variants include MR. The MAX6834VXRD0+ is a 3-pin device (GND, RESET, VCC) with no MR terminal.
What is the purpose of the open-drain RESET output in the MAX6834VXRD0+?
The open-drain RESET output in the MAX6834VXRD0+ enables wired-OR connection with other reset sources (e.g., watchdog timers or other supervisors) and supports level-shifting-allowing the RESET signal to be pulled up to a voltage higher than VCC (up to +6.0V). This is essential for interfacing with µPs that have bidirectional reset pins or systems where reset logic resides on a different supply domain than the monitored core rail.
Can the MAX6834VXRD0+ operate with supply voltages below 1.2V?
Yes, the MAX6834VXRD0+ guarantees functional reset operation down to VCC = 0.55V, as stated in the Absolute Maximum Ratings and Electrical Characteristics tables. However, its 1.575V reset threshold means it will assert RESET whenever VCC falls below that level-so sustained operation below 1.575V triggers reset. The device remains electrically functional (e.g., sinking RESET current) down to 0.55V, enabling controlled shutdown sequencing.
Is the MAX6834VXRD0+ pin-compatible with older Maxim reset ICs like the MAX809?
Yes, the MAX6834VXRD0+ is explicitly stated as pin-compatible with the MAX803/MAX809/MAX810 series, as well as MAX6711–MAX6713 and MAX6381–MAX6390 families. All are offered in SC70-3 packages with identical pinout (GND, RESET, VCC), enabling drop-in replacement in existing designs-provided the reset threshold (1.575V) and timeout (1.5ms) meet system requirements.
MAX6834VXRD0+ 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:
- 1.575V
- 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
MAX6834VXRD0+ FAQ
1.How can I place an order for MAX6834VXRD0+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6834VXRD0+ 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 MAX6834VXRD0+ reliable?
The price and inventory of MAX6834VXRD0+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6834VXRD0+ is usually 5 days.
3.What payment methods are accepted for MAX6834VXRD0+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6834VXRD0+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6834VXRD0+?
MAX6834VXRD0+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6834VXRD0+ 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 MAX6834VXRD0+?
For technical support, including MAX6834VXRD0+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6834VXRD0+ requirements.
6.How does Aetrix verify that MAX6834VXRD0+ is sourced from the original manufacturer or authorized distributors?
All MAX6834VXRD0+ 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 MAX6834VXRD0+ meets industry standards.
7.What is the process for return or replacement of MAX6834VXRD0+?
All MAX6834VXRD0+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6834VXRD0+, 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 MAX6834VXRD0+ part is unused and in its original packaging.
Return procedure for MAX6834VXRD0+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6834VXRD0+ Tags
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MIC826SYMT-TR
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