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Analog Devices Inc./Maxim Integrated MAX6834IXRD3+T
- Part No.:
- MAX6834IXRD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6834IXRD3+T.pdf
- Description:
- IC MPU SUPERVISOR SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:17,500
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Product details
Overview
MAX6834IXRD3+T from Maxim Integrated is an ultra-low-voltage, open-drain active-low microprocessor reset circuit in SC70-3 package, designed to monitor +1.2V to +1.8V supplies with factory-set 1.388V reset threshold and 210ms timeout period. It asserts RESET when VCC falls below threshold or during manual reset, and guarantees valid reset output down to VCC = 0.55V. Used in portable battery-powered systems for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6834IXRD3+T datasheet, MAX6834IXRD3+T pinout, MAX6834IXRD3+T application, or MAX6834IXRD3+T equivalent, key selection criteria include open-drain reset compatibility with bidirectional µP reset pins, low 7.5µA supply current, ±2.5% threshold accuracy over temperature, and immunity to short negative VCC transients.
Technical Context
The MAX6834IXRD3+T implements a precision voltage comparator with 444mV internal reference, comparing VCC against a factory-trimmed threshold (1.388V) to trigger reset assertion. Its open-drain RESET output requires an external pullup and supports level-shifting across supply domains - e.g., monitoring a 1.2V core while pulling up to a 3.3V I/O rail.
It features fixed 210ms reset timeout (D3 suffix), operates from VCC = 0.55V to 3.6V, and maintains reset validity during power-down transitions. The device ignores fast VCC transients ≤100ns and includes hysteresis (0.75% of VTH) to prevent chatter near threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.388V ±2.5% over -40°C to +85°C - ensures accurate trip point for 1.4V nominal supplies without external calibration |
| Reset Timeout Period | 210ms - provides sufficient hold time for slow-ramping µP clock domains and memory initialization sequences |
| 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 interface with bidirectional µP reset pins |
| VCC Operating Range | 0.55V to 3.6V - supports valid reset assertion down to deep brownout conditions before system collapse |
| Reset Propagation Delay | 60µs max (VCC falling) - ensures rapid response to supply collapse without missing critical timing windows |
| MR Input Support | Not present - MAX6834 uses VCC-only monitoring; no manual reset pin included in SC70-3 variant |
Pinout & Package
MAX6834IXRD3+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm, 0.65mm pitch), optimized for space-constrained portable designs. 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 | Ground reference | Return path for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 - RESET | Open-drain active-low reset output | Sinks current when asserted; requires external pullup resistor (typically 10–100kΩ) to defined logic-high voltage rail |
| 3 - VCC | Supply and monitored voltage input | Both powers the IC and serves as the monitored rail; valid operation guaranteed from 0.55V to 3.6V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.388V threshold | Eliminates external resistor divider and calibration effort for 1.4V supply monitoring |
| 210ms reset timeout (D3) | Matches typical µP power-up sequencing requirements for ARM Cortex-M and RISC-V SoCs |
| 7.5µA supply current | Reduces quiescent load on coin-cell or energy-harvesting sources by >50% vs. legacy reset ICs |
| ±2.5% threshold accuracy over temp | Ensures consistent reset behavior across industrial temperature range without derating |
| Immunity to 100ns VCC glitches | Prevents false resets in noisy DC/DC converter environments without added RC filtering |
Applications
| Portable Medical Sensors | Wearable Fitness Trackers |
|---|---|
Use Scenario: Continuous ECG/PPG monitoring powered by CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Voltage detector and reset supervisor ensuring clean µC boot after cold start or battery sag. Use Value: 7.5µA ICC extends battery life beyond 12 months; 1.388V threshold aligns precisely with 1.4V LDO output under load. |
Use Scenario: Accelerometer and gyroscope subsystem powered by 1.2V buck converter in wrist-worn form factor. IC Role / Device Role / Timing Role: Brownout detector asserting reset during transient voltage dip caused by RF transmit bursts. Use Value: 210ms timeout prevents premature release of reset during converter recovery; open-drain output interfaces directly with bidirectional nRESET pin of Nordic nRF52832. |
| Industrial IoT Edge Nodes | Low-Power Microcontroller Modules |
Use Scenario: LoRaWAN node operating from supercapacitor backup during AC mains failure. IC Role / Device Role / Timing Role: Monitors 1.35V backup rail and holds µP in reset until stable voltage is restored post-failure. Use Value: Valid reset down to 0.55V VCC ensures deterministic behavior during capacitor discharge decay; ±2.5% accuracy avoids marginal trip points. |
Use Scenario: RISC-V-based sensor module with shared reset net across MCU, flash, and analog front-end. IC Role / Device Role / Timing Role: Centralized reset source using open-drain topology to enable multiple devices to drive same reset line. Use Value: Wired-OR capability eliminates need for external logic gates; SC70-3 footprint saves >0.8mm² PCB area vs. SOT-23 alternatives. |
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 |
|---|---|---|---|
| MAX6381XR24+T | Push-pull active-low output; 2.4V threshold; 200ms timeout; SC70-3 | Requires pullup removal and layout change; suited for higher-voltage rails (2.4V) | Select only if monitoring >2.0V supply; not drop-in due to different threshold and output drive architecture |
| TPS3123E13DBVR | Open-drain active-low; 1.33V threshold; 200ms timeout; SOT-23-3 | Same functional role but larger 2.92mm × 1.62mm footprint; 10µA ICC | Acceptable alternative if SC70-3 footprint unavailable; verify 1.33V vs. 1.388V margin in target application |
Compared with MAX6834IXRD3+T, MAX6381XR24+T offers higher threshold and push-pull drive but lacks open-drain flexibility, while TPS3123E13DBVR matches output type and threshold closely but consumes 33% more current and occupies 2.5× more board area.
Availability
MAX6834IXRD3+T is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, industrial IoT edge nodes, and low-power microcontroller modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX6834IXRD3+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 is a semiconductor company specializing in analog and mixed-signal ICs for power management, sensing, and interface applications.
The MAX6832–MAX6840 family was designed specifically for ultra-low-voltage µP supervision in space- and power-constrained portable electronics, emphasizing sub-1µA quiescent current and SC70 packaging.
FAQ
What is the exact reset threshold voltage of the MAX6834IXRD3+T?
The MAX6834IXRD3+T has a factory-set reset threshold of 1.388V, with ±2.5% accuracy over the full -40°C to +85°C operating temperature range. This value is confirmed in the Electrical Characteristics table of the MAX6832–MAX6840 datasheet and corresponds to the 'I' threshold suffix. The threshold remains stable due to internal trimming and 0.75% hysteresis.
Does the MAX6834IXRD3+T include a manual reset (MR) input?
No, the MAX6834IXRD3+T does not include a manual reset input. As a member of the MAX6834/MAX6837/MAX6840 group in SC70-3 package, it monitors only VCC and asserts reset based solely on supply voltage crossing the 1.388V threshold. MR functionality is exclusive to the 4-pin SC70 variants (e.g., MAX6835/MAX6836/MAX6837).
What is the function of the RESET pin on the MAX6834IXRD3+T?
The RESET pin on the MAX6834IXRD3+T is an open-drain active-low output. When asserted (VCC < 1.388V), it sinks current to pull the line low; when deasserted, it presents high impedance. An external pullup resistor is mandatory - typically connected to a logic rail (e.g., 3.3V or 1.8V) - enabling level-shifting and wired-OR reset bus configurations.
Can the MAX6834IXRD3+T operate with VCC below 1.0V?
Yes, the MAX6834IXRD3+T is fully specified to operate down to VCC = 0.55V. Its reset comparator remains functional, and the open-drain RESET output can sink up to 15µA at VCC ≥ 0.55V. Below 0.55V, reset behavior is not guaranteed, though the device remains undamaged per absolute maximum ratings.
What does the 'D3' in MAX6834IXRD3+T indicate?
The 'D3' suffix in MAX6834IXRD3+T specifies the reset timeout period: 210ms. This is the duration for which the RESET output remains asserted after VCC rises above the 1.388V threshold. The D3 option is selected via the Active Timeout Period Guide in the datasheet and is implemented internally with no external components required.
MAX6834IXRD3+T 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+T FAQ
1.How can I place an order for MAX6834IXRD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6834IXRD3+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 MAX6834IXRD3+T reliable?
The price and inventory of MAX6834IXRD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6834IXRD3+T is usually 5 days.
3.What payment methods are accepted for MAX6834IXRD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6834IXRD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6834IXRD3+T?
MAX6834IXRD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6834IXRD3+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 MAX6834IXRD3+T?
For technical support, including MAX6834IXRD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6834IXRD3+T requirements.
6.How does Aetrix verify that MAX6834IXRD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6834IXRD3+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 MAX6834IXRD3+T meets industry standards.
7.What is the process for return or replacement of MAX6834IXRD3+T?
All MAX6834IXRD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6834IXRD3+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 MAX6834IXRD3+T part is unused and in its original packaging.
Return procedure for MAX6834IXRD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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