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Analog Devices Inc./Maxim Integrated MAX6834VXRD3
- Part No.:
- MAX6834VXRD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6834VXRD3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,857
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Product details
Overview
MAX6834VXRD3 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 (suffix V), and 210ms reset timeout (suffix D3). 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 µP systems.
For engineers reviewing the MAX6834VXRD3 datasheet, MAX6834VXRD3 pinout, MAX6834VXRD3 application, or MAX6834VXRD3 equivalent, key selection criteria include open-drain reset compatibility with bidirectional µP reset pins, 210ms timeout timing, ±2.5% threshold accuracy over temperature, low 7.5µA supply current, and SC70-3 footprint constraints.
Technical Context
The MAX6834VXRD3 implements a precision voltage comparator with hysteresis (0.75% of VTH) and fixed 210ms reset timeout after VCC recovery or MR release. Its reset assertion logic responds to VCC falling below 1.575V (±2.5% over –40°C to +85°C) and remains asserted until VCC exceeds threshold for the full timeout period.
It features an open-drain RESET output requiring external pullup, enabling level-shifting across supply domains and direct interfacing with bidirectional µP reset I/O. The device ignores fast negative VCC transients up to 100ns and operates with supply voltages as low as 0.55V while maintaining guaranteed reset validity.
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 | 210ms - provides sufficient hold time for µP initialization and peripheral stabilization |
| Supply Current | 7.5µA typical at +25°C - enables multi-year battery life in always-on portable equipment |
| VCC Operating Range | 0.55V to 3.6V - guarantees functional reset assertion even during deep brownout conditions |
| RESET Output Type | Open-drain active-low - supports wired-OR reset networks and bidirectional µP reset pins without conflict |
| Package | SC70-3 - 1.25mm × 0.85mm footprint ideal for space-constrained handheld and wearable designs |
| Reset Propagation Delay | 60µs max on VCC fall - ensures rapid response to supply collapse before µP executes invalid instructions |
Pinout & Package
MAX6834VXRD3 uses the 3-pin SC70-3 package (1.25mm × 0.85mm, 0.65mm pitch), with GND on Pin 1, RESET (open-drain active-low) on Pin 2, and VCC on Pin 3.
| 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 to VCC or higher supply) to define high state |
| Pin 3 (VCC) | Supply and monitored voltage input | Power source and primary voltage monitoring node; valid operation supported down to 0.55V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.575V reset threshold | Eliminates external resistor divider and calibration, reducing BOM count and layout area for 1.6V core rails |
| 210ms fixed reset timeout | Ensures µP and memory subsystems fully stabilize before release, avoiding boot failures in complex embedded firmware |
| 7.5µA supply current | Minimizes quiescent drain on coin-cell or Li-ion backup supplies in always-on monitoring applications |
| ±2.5% threshold accuracy over temperature | Prevents premature or delayed reset assertion across industrial temperature range without trimming |
| Immunity to 100ns VCC glitches | Rejects noise-induced false resets from switching regulators or digital crosstalk without external filtering |
Applications
| Portable Medical Sensors | Wearable Fitness Trackers |
|---|---|
Use Scenario: Continuous ECG/PPG sensing powered by single CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises 1.5V LDO output powering MCU and analog front-end; asserts reset if battery sags below 1.575V during RF burst. Use Value: Prevents corrupted sensor data writes and BLE stack lockups by enforcing clean restart before voltage collapse reaches critical levels. |
Use Scenario: Ultra-thin wrist-worn device with 1.2V core supply and 3.3V display interface. IC Role / Device Role / Timing Role: Monitors 1.2V core rail and generates 210ms open-drain reset pulse to coordinate MCU and display controller startup sequencing. Use Value: Enables shared RESET line between MCU and display IC using single pullup, eliminating need for discrete OR-gating logic. |
| Industrial IoT Edge Nodes | Low-Power Smart Meters |
Use Scenario: Battery-backed sensor node operating in remote locations with wide ambient temperature swings (–40°C to +85°C). IC Role / Device Role / Timing Role: Provides temperature-stable reset supervision for ARM Cortex-M0+ MCU running on 1.6V regulated supply. Use Value: ±2.5% threshold accuracy prevents spurious resets at cold extremes where battery voltage droops but system remains functional. |
Use Scenario: AMI smart meter with dual-supply architecture: 1.5V MCU core and 3.3V metrology ADC. IC Role / Device Role / Timing Role: Uses open-drain RESET pulled to 3.3V to assert reset on both 1.5V MCU and 3.3V ADC simultaneously during brownout. Use Value: Eliminates separate reset ICs per supply domain, reducing component count and PCB area in cost-sensitive utility-grade design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6381XR29D3-T | Same SC70-3 package, 1.575V threshold, 210ms timeout, but push-pull active-low RESET output | Requires no external pullup; incompatible with bidirectional µP reset pins or level-shifting | Select when board space allows no extra resistor and reset net drives only one CMOS input |
| TPS3123E15DBVR | 3-pin SOT-23, 1.55V threshold, 200ms timeout, 5µA supply current, but no VCC < 0.7V reset guarantee | Lacks guaranteed reset validity below 0.7V - unsuitable for deep brownout detection in ultra-low-VCC systems | Select when lowest possible quiescent current is critical and brownout occurs above 0.7V |
Compared with MAX6834VXRD3, MAX6381XR29D3-T eliminates the pullup resistor but sacrifices bidirectional reset compatibility, while TPS3123E15DBVR reduces current draw by 33% but forfeits sub-0.7V reset assurance required for robust battery-dead detection.
Availability
MAX6834VXRD3 is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, industrial IoT edge nodes, low-power smart meters, and battery-backed embedded controllers requiring stable component supply across extended temperature ranges.
Supply support for MAX6834VXRD3 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 consumer systems.
The MAX6832–MAX6840 family delivers ultra-low-voltage supervisory circuits optimized for space-constrained, battery-powered µP systems requiring high-accuracy reset thresholds and minimal quiescent current.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6834VXRD3?
The MAX6834VXRD3 has a factory-set reset threshold of 1.575V with ±2.5% accuracy over the full operating temperature range of –40°C to +85°C. This value is confirmed in the Electrical Characteristics table under "Reset Threshold (VTH)" for suffix V devices and applies directly to MAX6834VXRD3 without adjustment or calibration.
Does MAX6834VXRD3 support operation below 1.0V supply voltage?
Yes, MAX6834VXRD3 guarantees functional reset assertion down to VCC = 0.55V. Its internal comparator and open-drain output remain operational in this range, ensuring reliable brownout detection even as battery voltage collapses in deeply discharged states - a key capability confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections.
What is the required external pullup resistor value for the MAX6834VXRD3 RESET pin?
MAX6834VXRD3 does not specify a mandatory pullup value; typical designs use 4.7kΩ to 10kΩ connected to VCC or a higher supply (up to 6V). The choice depends on rise time requirements and bus loading: lower resistance improves speed but increases static current, while higher resistance saves power but may slow transitions on long traces or capacitive loads.
Can MAX6834VXRD3 interface directly with a microprocessor that has a bidirectional reset pin?
Yes, MAX6834VXRD3's open-drain active-low RESET output is explicitly designed for this purpose. As stated in the Applications Information section, connecting its RESET pin directly to a bidirectional µP reset I/O with a single pullup resistor allows either device to assert reset - a verified configuration shown in Figure 4 of the datasheet.
What is the reset timeout period for MAX6834VXRD3 and how is it selected?
MAX6834VXRD3 has a fixed 210ms reset timeout period, indicated by the "D3" suffix in its part number. This value is one of five factory-programmed options (D0–D4) and is not user-adjustable. The timeout begins when VCC rises above 1.575V or when MR is released, and holds RESET low for the full 210ms duration regardless of subsequent VCC fluctuations.
MAX6834VXRD3 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
MAX6834VXRD3 FAQ
1.How can I place an order for MAX6834VXRD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6834VXRD3 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 MAX6834VXRD3 reliable?
The price and inventory of MAX6834VXRD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6834VXRD3 is usually 5 days.
3.What payment methods are accepted for MAX6834VXRD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6834VXRD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6834VXRD3?
MAX6834VXRD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6834VXRD3 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 MAX6834VXRD3?
For technical support, including MAX6834VXRD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6834VXRD3 requirements.
6.How does Aetrix verify that MAX6834VXRD3 is sourced from the original manufacturer or authorized distributors?
All MAX6834VXRD3 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 MAX6834VXRD3 meets industry standards.
7.What is the process for return or replacement of MAX6834VXRD3?
All MAX6834VXRD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6834VXRD3, 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 MAX6834VXRD3 part is unused and in its original packaging.
Return procedure for MAX6834VXRD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6834VXRD3 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
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TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
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MCP130T-315I/TT
Microchip Technology
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MCP120T-475I/TT
Microchip Technology
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MCP111T-300E/TT
Microchip Technology
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MCP120T-315I/TT
Microchip Technology
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MCP809T-315I/TT
Microchip Technology
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