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Analog Devices Inc./Maxim Integrated MAX6834IXRD3
- Part No.:
- MAX6834IXRD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6834IXRD3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:851
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Product details
Overview
MAX6834IXRD3 from Maxim Integrated is a low-voltage microprocessor supervisory circuit with open-drain active-low reset output, factory-set 1.388V reset threshold, and 210ms reset timeout period. It monitors +1.2V to +1.8V supply rails in portable and battery-powered systems, asserting reset during brownout or power-down events while consuming only 7.5µA typical supply current.
For engineers reviewing the MAX6834IXRD3 datasheet, MAX6834IXRD3 pinout, MAX6834IXRD3 application, or MAX6834IXRD3 equivalent, this device serves as a precision voltage detector and reset generator for ultra-low-power µP systems requiring guaranteed reset assertion down to VCC = 0.55V and compatibility with bidirectional reset I/O interfaces.
Technical Context
The MAX6834IXRD3 implements a precision bandgap-based voltage comparator with ±2.5% reset threshold accuracy over -40°C to +85°C, paired with a fixed 210ms timeout timer that holds RESET asserted after VCC recovers above 1.388V. Its open-drain RESET output requires an external pullup resistor and supports level-shifting across multiple supply domains.
This variant belongs to the MAX6834/MAX6837/MAX6840 subgroup featuring open-drain active-low reset, no manual reset (MR) input, and no RESET-IN pin-unlike MR-equipped or adjustable-threshold variants. It operates from VCC = 0.55V to 3.6V and guarantees valid reset output down to VCC = 0.55V with VOL ≤ 0.2V at 200µA sink current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.388V ±2.5% - precisely matches 1.4V core supplies; enables reliable brownout detection without external calibration |
| Reset Timeout Period | 210ms - ensures µP completes full power-up initialization before release; avoids premature code execution |
| Supply Current | 7.5µA (typ) at 1.2V - minimizes quiescent drain in battery-critical applications such as wearables and IoT sensors |
| Operating Voltage Range | 0.55V to 3.6V - supports operation during deep brownout and enables reset assertion even as VCC collapses |
| Output Type | Open-drain active-low - allows wired-OR configuration and direct interfacing with bidirectional µP reset pins |
| Reset Validity Limit | VCC ≥ 0.55V - guarantees RESET remains actively pulled low down to near-zero supply, preventing floating states |
| Package | 3-pin SC70 - 2.0mm × 2.1mm footprint saves board space in compact portable designs |
Pinout & Package
MAX6834IXRD3 is housed in a 3-pin SC70 package (2.0mm × 2.1mm, 0.5mm pitch), optimized for space-constrained portable electronics. Pin 1 is GND, Pin 2 is RESET (open-drain active-low), and Pin 3 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Open-drain active-low output; requires external pullup resistor (typically 10–100kΩ) to target logic rail (e.g., 1.8V, 3.3V, or 5V) |
| 3 | VCC | Monitored supply input and power source; accepts 0.55V–3.6V; powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.388V threshold | Eliminates external resistor divider; ensures accurate reset point for 1.4V nominal supplies without calibration overhead |
| 210ms fixed timeout | Guarantees sufficient hold time for slow-ramping µP clocks and PLL lock sequences before release |
| 7.5µA supply current | Extends battery life in always-on monitoring applications; enables multi-year operation on coin cells |
| ±2.5% threshold accuracy over temperature | Maintains tight reset window across industrial temperature range (-40°C to +85°C), reducing false triggers |
| Open-drain RESET with 0.2V VOL @ 200µA | Ensures clean logic-low assertion into high-capacitance µP reset lines; compatible with mixed-voltage systems |
Applications
| Portable Medical Sensors | Battery-Powered IoT Nodes |
|---|---|
Use Scenario: Wearable ECG patch operating from single Li-ion cell with dynamic voltage sag during RF transmission. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset when cell voltage drops below 1.388V during load transients. Use Value: Prevents firmware crash by holding µP in reset until battery recovers above threshold and 210ms timeout expires. |
Use Scenario: Sub-GHz sensor node sampling temperature every 5 minutes, powered by alkaline AA batteries. IC Role / Device Role / Timing Role: Brownout detector triggering reset if battery voltage falls below 1.388V during cold-weather operation. Use Value: Ensures deterministic restart after voltage recovery, avoiding corrupted EEPROM writes or missed wake-up events. |
| Low-Power Microcontroller Modules | Industrial Handheld Terminals |
Use Scenario: ARM Cortex-M0+ module with 1.2V core supply and shared reset bus across multiple peripherals. IC Role / Device Role / Timing Role: Open-drain reset generator enabling wired-OR reset arbitration with other supervisors or watchdog ICs. Use Value: Allows unified reset signaling without level translators; pullup to 3.3V I/O rail maintains compatibility with 1.2V core logic. |
Use Scenario: Ruggedized barcode scanner using 1.8V FPGA core and 3.3V interface logic, subject to ESD-induced supply glitches. IC Role / Device Role / Timing Role: Immune-to-glitch voltage detector asserting reset only on sustained VCC dip >100ns below 1.388V. Use Value: Rejects short ESD transients while responding reliably to true brownouts, improving field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6834HXRD3 | 1.313V reset threshold (vs. 1.388V); identical 210ms timeout, SC70-3, open-drain output | Suitable for 1.3V core supplies; not interchangeable where 1.388V trip point is required for margin against 1.4V nominal rails | Select when system VCC nominal is 1.3V and tighter threshold margin is needed relative to 1.313V |
| MAX6837IXSD3 | 4-pin SC70 package with MR input; same 1.388V threshold and 210ms timeout; adds debounced manual reset capability | Required where operator-initiated reset or test-mode reset is needed; occupies larger footprint and adds MR routing complexity | Choose only if manual reset functionality is mandatory; otherwise MAX6834IXRD3 offers smaller size and lower BOM count |
Compared with MAX6834HXRD3, MAX6834IXRD3 provides higher reset threshold for improved noise margin on 1.4V rails; compared with MAX6837IXSD3, it eliminates MR pin and reduces package size, simplifying layout in space-constrained designs where manual reset is unnecessary.
Availability
MAX6834IXRD3 is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT nodes, and low-power microcontroller modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX6834IXRD3 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 markets.
The MAX6832–MAX6840 family delivers ultra-low-voltage supervisory circuits targeting portable and battery-operated systems where minimal quiescent current and small footprint are critical design constraints.
FAQ
What is the exact reset threshold voltage of the MAX6834IXRD3?
The MAX6834IXRD3 has a factory-set reset threshold of 1.388V with ±2.5% accuracy over the full -40°C to +85°C temperature range. This value is defined by the 'I' suffix in the part number and is verified per Maxim's Electrical Characteristics table. The threshold remains stable across VCC variations from 0.55V to 3.6V, ensuring consistent brownout detection behavior regardless of supply headroom.
Does the MAX6834IXRD3 include a manual reset (MR) input?
No, the MAX6834IXRD3 does not include a manual reset (MR) input. It belongs to the MAX6834/MAX6837/MAX6840 subgroup with open-drain reset output but no MR pin. Unlike MAX6835/MAX6836/MAX6837 variants, this device relies solely on VCC monitoring for reset assertion. If manual reset capability is required, MAX6837IXSD3 (4-pin SC70 with MR) is the functionally closest alternative.
What is the purpose of the open-drain RESET output on the MAX6834IXRD3?
The open-drain RESET output on the MAX6834IXRD3 enables wired-OR reset bus configurations and direct interfacing with µPs that have bidirectional reset I/O pins. It requires an external pullup resistor to a logic rail (e.g., 1.8V or 3.3V), allowing level-shifting between the monitored VCC domain and other voltage domains. This architecture prevents contention and supports multi-source reset arbitration in complex systems.
Can the MAX6834IXRD3 operate with VCC below 1.2V?
Yes, the MAX6834IXRD3 is specified to operate with VCC as low as 0.55V and guarantees valid reset output down to that level. Its internal circuitry remains functional and asserts RESET correctly even during deep brownout conditions. However, the reset timeout period (210ms) and threshold accuracy (±2.5%) are fully characterized only for VCC ≥ 1.1V per the datasheet's Electrical Characteristics table.
What package type and dimensions does the MAX6834IXRD3 use?
The MAX6834IXRD3 uses a 3-pin SC70 package measuring 2.0mm × 2.1mm with 0.5mm lead pitch. This ultra-compact outline is documented in Maxim's package drawing 21-0075. The pinout is GND (Pin 1), RESET (Pin 2), and VCC (Pin 3). No thermal pad or exposed die attach is present; standard reflow profiles for SC70 components apply.
MAX6834IXRD3 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
MAX6834IXRD3 FAQ
1.How can I place an order for MAX6834IXRD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6834IXRD3 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 MAX6834IXRD3 reliable?
The price and inventory of MAX6834IXRD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6834IXRD3 is usually 5 days.
3.What payment methods are accepted for MAX6834IXRD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6834IXRD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6834IXRD3?
MAX6834IXRD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6834IXRD3 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 MAX6834IXRD3?
For technical support, including MAX6834IXRD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6834IXRD3 requirements.
6.How does Aetrix verify that MAX6834IXRD3 is sourced from the original manufacturer or authorized distributors?
All MAX6834IXRD3 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 MAX6834IXRD3 meets industry standards.
7.What is the process for return or replacement of MAX6834IXRD3?
All MAX6834IXRD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6834IXRD3, 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 MAX6834IXRD3 part is unused and in its original packaging.
Return procedure for MAX6834IXRD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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