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Analog Devices Inc./Maxim Integrated MAX6834WXRD0-T
- Part No.:
- MAX6834WXRD0-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6834WXRD0-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
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Product details
Overview
MAX6834WXRD0-T from Maxim Integrated is an ultra-low-voltage, open-drain active-low microprocessor reset circuit in SC70-3 package, designed to monitor +1.665V supply rails with ±2.5% threshold accuracy over temperature. It asserts reset when VCC falls below 1.665V or during manual reset, maintains reset for 70µs after recovery, and draws only 7.5µA typical supply current-ideal for battery-powered portable systems requiring reliable brownout protection.
For engineers reviewing the MAX6834WXRD0-T datasheet, MAX6834WXRD0-T pinout, MAX6834WXRD0-T application, or MAX6834WXRD0-T equivalent, this device delivers precise low-voltage supervision with open-drain flexibility for bidirectional µP reset interfaces, level-shifting across multiple supplies, and immunity to short VCC transients up to 100ns.
Technical Context
The MAX6834WXRD0-T implements a precision bandgap-based voltage comparator with 444mV internal reference, comparing VCC directly to factory-trimmed 1.665V threshold (W-suffix). Its reset logic includes fixed 70µs timeout (D0-suffix), guaranteed reset assertion down to VCC = 0.55V, and open-drain output capable of sinking 200µA at 0.2V VOL while supporting pullup voltages up to 6.0V.
No manual reset (MR) or RESET-IN input is present-this variant uses direct VCC monitoring only and omits the debounced MR pin found in 4-pin versions. The SC70-3 package integrates GND, VCC, and open-drain RESET terminals with no additional control pins, simplifying layout for space-constrained applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.665V ±2.5% over -40°C to +85°C - ensures accurate brownout detection for 1.65V–1.7V core supplies |
| Reset Timeout Period | 70µs - minimal delay for fast power-up sequencing in low-latency embedded systems |
| Supply Current | 7.5µA (typ) at VCC = 1.2V - enables multi-year battery life in always-on monitoring circuits |
| Output Type | Open-drain active-low RESET - supports wired-OR reset buses and level-shifting to higher-voltage domains |
| VCC Operating Range | 0.55V to 3.6V - guarantees valid reset assertion even during deep brownout conditions |
| Reset Output Sink Capability | 200µA at VOL ≤ 0.2V - drives standard CMOS inputs without external buffer stages |
| Transient Immunity | Immune to VCC glitches <100ns at 100mV overdrive - suppresses noise-induced false resets |
Pinout & Package
MAX6834WXRD0-T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for high-density PCB layouts. Pin 1 is GND, Pin 2 is RESET (open-drain active-low), and Pin 3 is VCC. No MR or RESET-IN pins are present.
| 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 | Requires external pullup resistor; sinks current during reset assertion; compatible with 0–6V pullup domains |
| Pin 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 1.665V reset threshold | Eliminates external resistor networks and calibration steps for 1.65V–1.7V supply monitoring |
| 70µs fixed reset timeout | Meets fast-boot requirements for real-time microcontrollers without software-configurable delays |
| Open-drain RESET with 6V-tolerant pullup | Enables reset signal sharing across mixed-voltage subsystems (e.g., 1.2V core + 3.3V I/O domain) |
| 7.5µA supply current at 1.2V | Reduces quiescent power in always-on supervisory paths-critical for coin-cell–powered devices |
| Guaranteed reset down to VCC = 0.55V | Ensures deterministic reset behavior during deep undervoltage events before complete power collapse |
Applications
| Portable Medical Sensors | Industrial IoT Edge Nodes |
|---|---|
|
Use Scenario: Wearable ECG sensor operating from single Li-ion cell with dynamic voltage sag during RF transmission. IC Role / Device Role / Timing Role: Voltage detector asserting active-low reset to ARM Cortex-M0+ MCU when cell voltage drops below 1.665V during load transients. Use Value: Prevents firmware corruption by guaranteeing clean reset before supply collapses below 0.55V, with 70µs timeout enabling rapid recovery post-transient. |
Use Scenario: Battery-backed PLC I/O module monitoring 1.65V FPGA configuration rail in harsh industrial environments. IC Role / Device Role / Timing Role: Supervisory circuit providing open-drain reset signal shared across FPGA, microcontroller, and isolated CAN transceiver via common pullup. Use Value: Enables single-point reset coordination across mixed-voltage domains while tolerating 100ns VCC glitches induced by motor drive noise. |
| Low-Power Wireless Modems | Automotive Body Control Modules |
|
Use Scenario: NB-IoT modem powered by energy-harvesting source with slow-ramp startup and intermittent brownouts. IC Role / Device Role / Timing Role: Reset supervisor ensuring µP remains held in reset until harvested voltage stabilizes above 1.665V for ≥70µs. Use Value: Eliminates need for external RC timing network-reducing BOM count and PCB area in ultra-compact modules. |
Use Scenario: 12V-to-1.65V DC/DC-powered door module where core supply may dip during load dump or cold-crank. IC Role / Device Role / Timing Role: Dedicated low-voltage supervisor for ASIC core rail, interfacing via open-drain to shared reset bus with other submodules. Use Value: Provides ±2.5% threshold accuracy over automotive temperature range (-40°C to +85°C), ensuring consistent reset behavior across environmental extremes. |
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 |
|---|---|---|---|
| MAX809TRD1-T | Push-pull active-low reset; 3.08V threshold; SC70-3; 1.5ms timeout | Higher threshold and longer timeout-suitable for 3.3V systems but incompatible for 1.65V core monitoring | Select only if supervising >3.0V rails and push-pull drive is required |
| TPS3808G01DBVR | Adjustable threshold via external resistor; 1.5ms timeout; SOT-23-5; 2.5µA IQ | Requires external components for threshold setting; lower quiescent current but larger footprint and design overhead | Choose when adjustable trip point or ultra-low IQ (<3µA) outweighs BOM simplicity and SC70-3 size |
Compared with MAX6834WXRD0-T, MAX809TRD1-T offers push-pull drive but cannot monitor sub-2V supplies, while TPS3808G01DBVR provides threshold flexibility at the cost of added components and larger package-making MAX6834WXRD0-T optimal for fixed 1.665V, space-constrained, open-drain applications.
Availability
MAX6834WXRD0-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, low-power wireless modems, and automotive body control modules requiring stable component supply with guaranteed long-term continuity.
Supply support for MAX6834WXRD0-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, sensing, and interface applications, with emphasis on reliability and integration for demanding environments.
The MAX6832–MAX6840 family delivers ultra-low-voltage reset supervision for battery-powered and energy-sensitive systems, targeting applications where sub-2V supply monitoring, minimal quiescent current, and SC70 packaging are critical.
FAQ
What is the exact reset threshold voltage of the MAX6834WXRD0-T?
The MAX6834WXRD0-T has a factory-trimmed reset threshold of 1.665V with ±2.5% accuracy over the full -40°C to +85°C operating temperature range. This value is fixed and non-adjustable, corresponding to the 'W' suffix in the part number per the Threshold Suffix Guide. The threshold is guaranteed to remain stable across temperature and supply variations without external components.
Does the MAX6834WXRD0-T include a manual reset (MR) input?
No, the MAX6834WXRD0-T does not include a manual reset (MR) input. As a 3-pin SC70-3 variant in the MAX6834 series, it monitors VCC only and lacks the MR pin found in 4-pin versions like MAX6835/MAX6836. Its reset assertion is triggered solely by VCC falling below 1.665V or by external circuitry pulling RESET low via the open-drain configuration.
What is the minimum VCC voltage at which the MAX6834WXRD0-T guarantees valid reset output?
The MAX6834WXRD0-T guarantees valid reset output down to VCC = 0.55V for active-low assertion. Below this voltage, the internal output stage ceases to sink current reliably. For applications requiring reset validity down to 0V, a 100kΩ pulldown resistor on the RESET line is recommended to prevent floating states during deep brownout.
Can the MAX6834WXRD0-T's open-drain RESET output be pulled up to a voltage higher than VCC?
Yes, the MAX6834WXRD0-T's open-drain RESET output supports pullup voltages up to 6.0V, independent of VCC. This allows level-shifting-for example, using a 3.3V or 5V pullup while monitoring a 1.65V VCC rail. The output transistor is rated for 6.0V drain-source voltage, enabling interoperability across mixed-voltage subsystems without additional level translators.
What timeout period is implemented in the MAX6834WXRD0-T?
The MAX6834WXRD0-T implements a 70µs reset timeout period, indicated by the 'D0' suffix in the part number. This is the shortest available option in the MAX6832–MAX6840 family and is optimized for fast power-up sequencing in low-latency microcontroller applications. The timeout begins after VCC rises above 1.665V and ends precisely 70µs later, releasing the RESET signal.
MAX6834WXRD0-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
MAX6834WXRD0-T FAQ
1.How can I place an order for MAX6834WXRD0-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6834WXRD0-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 MAX6834WXRD0-T reliable?
The price and inventory of MAX6834WXRD0-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6834WXRD0-T is usually 5 days.
3.What payment methods are accepted for MAX6834WXRD0-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6834WXRD0-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6834WXRD0-T?
MAX6834WXRD0-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6834WXRD0-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 MAX6834WXRD0-T?
For technical support, including MAX6834WXRD0-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6834WXRD0-T requirements.
6.How does Aetrix verify that MAX6834WXRD0-T is sourced from the original manufacturer or authorized distributors?
All MAX6834WXRD0-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 MAX6834WXRD0-T meets industry standards.
7.What is the process for return or replacement of MAX6834WXRD0-T?
All MAX6834WXRD0-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6834WXRD0-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 MAX6834WXRD0-T part is unused and in its original packaging.
Return procedure for MAX6834WXRD0-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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