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Analog Devices Inc./Maxim Integrated MAX6834FXRD1+T
- Part No.:
- MAX6834FXRD1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6834FXRD1+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,519
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Product details
Overview
MAX6834FXRD1+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 1.050V reset threshold and 1.5ms 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 initialization and brownout protection.
For engineers reviewing the MAX6834FXRD1+T datasheet, MAX6834FXRD1+T pinout, MAX6834FXRD1+T application, or MAX6834FXRD1+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 MAX6834FXRD1+T implements a precision voltage comparator with 444mV internal reference, comparing VCC against a factory-trimmed threshold (1.050V) 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 1.5ms reset timeout (D1 suffix), operates from VCC = 0.55V to 3.6V, and maintains reset validity down to 0.55V with guaranteed VOL ≤ 0.15V at ISINK = 15µA. The device ignores fast VCC transients (<100ns glitches) and includes no MR or RESET-IN pins - confirming its dedicated voltage-detection role without manual or adjustable inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.050V ±2.5% - precisely monitors 1.2V supply rails with tight tolerance over -40°C to +85°C. |
| Reset Timeout Period | 1.5ms - ensures µP remains held in reset long enough for stable power-up sequencing after VCC recovery. |
| Supply Current | 7.5µA (typ) at VCC = 1.2V - enables multi-year battery life in always-on portable instrumentation. |
| Output Type | Open-drain active-low - allows wired-OR configuration and level-shifting to higher voltage rails (up to 6V). |
| VCC Operating Range | 0.55V to 3.6V - guarantees reset assertion even during deep brownout conditions before system collapse. |
| Reset Output Validity | Valid down to VCC = 0.55V - ensures deterministic logic state on RESET line during full power-down ramp. |
| Threshold Accuracy | ±2.5% over temperature - eliminates need for external calibration in industrial-grade embedded controllers. |
Pinout & Package
MAX6834FXRD1+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained portable designs. Pin 1 = GND, Pin 2 = RESET (open-drain active-low), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference 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 defined logic-high voltage. |
| 3 | VCC | Monitored supply input and power source; also defines operating range (0.55V–3.6V) and reset threshold reference. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.050V threshold | Eliminates external resistor divider and calibration effort for 1.2V system monitoring. |
| 1.5ms fixed timeout | Matches typical µP power-up stabilization time without requiring external timing components. |
| 7.5µA supply current | Reduces quiescent power draw by >50% vs. legacy reset ICs, critical for coin-cell–powered sensors. |
| Open-drain RESET with 6V tolerance | Enables direct interface to 3.3V/5V µP reset pins without level translators or isolation diodes. |
| Immunity to <100ns VCC glitches | Prevents spurious resets in noisy DC/DC converter environments without added RC filtering. |
Applications
| Battery-Powered Wearables | Low-Voltage Microcontroller Systems |
|---|---|
|
Use Scenario: A fitness tracker uses a 1.2V core supply powered by a buck converter from a 3.7V Li-ion cell; voltage droop occurs during RF transmission bursts. IC Role / Device Role / Timing Role: MAX6834FXRD1+T continuously monitors the 1.2V rail and asserts open-drain RESET to hold the ARM Cortex-M0+ in reset until VCC recovers above 1.050V for ≥1.5ms. Use Value: Prevents corrupted firmware execution during transient brownouts, eliminating unexplained crashes without adding PCB area or BOM cost. |
Use Scenario: An industrial sensor node employs a 1.2V ultra-low-power MCU with bidirectional reset pin shared between internal watchdog and external supervisor. IC Role / Device Role / Timing Role: MAX6834FXRD1+T provides open-drain RESET output directly tied to the MCU's bidirectional reset I/O, enabling either device to force system reset. Use Value: Eliminates need for external OR-gate or discrete transistor logic, reducing component count and layout complexity in 4-layer IoT modules. |
| Portable Medical Devices | Energy-Harvesting Edge Nodes |
|
Use Scenario: A handheld glucose meter powers its analog front-end and display from a regulated 1.2V rail; cold-temperature operation causes slow VCC ramp-up during startup. IC Role / Device Role / Timing Role: MAX6834FXRD1+T holds reset asserted until VCC exceeds 1.050V and remains high for 1.5ms, ensuring all analog blocks stabilize before digital initialization. Use Value: Guarantees repeatable measurement accuracy across -20°C to +60°C ambient, validated per ISO 13485 design controls. |
Use Scenario: A solar-harvested environmental sensor accumulates charge on a supercapacitor before powering up a 1.2V MCU; VCC rises slowly and non-monotonically. IC Role / Device Role / Timing Role: MAX6834FXRD1+T detects first crossing of 1.050V and enforces 1.5ms minimum reset deassertion delay, preventing premature wake-up during capacitor charging ripple. Use Value: Increases effective energy utilization by 22% vs. fixed-delay RC reset circuits, extending deployment interval between maintenance cycles. |
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 output; 2.93V threshold; SC70-3; 1.5ms timeout; 12µA ICC. | Designed for 3.3V systems, not 1.2V; incompatible threshold and higher supply current. | Select only if migrating from legacy 3.3V designs with identical pinout and no need for sub-1.8V monitoring. |
| TPS3123E12DBVR | Open-drain active-low; 1.2V threshold; SOT-23-3; 200ms timeout; 2.5µA ICC. | Lower threshold (1.2V vs. 1.050V); longer timeout; smaller 2.92mm² footprint; tighter 1.5% threshold accuracy. | Prefer for new 1.2V designs prioritizing ultra-low ICC and tighter threshold spec, accepting longer reset hold time. |
Compared with MAX809TRD1+T and TPS3123E12DBVR, MAX6834FXRD1+T uniquely balances 1.050V threshold accuracy, 1.5ms timing, open-drain flexibility, and 7.5µA consumption in SC70-3 - making it optimal for space- and power-constrained 1.2V systems where precise brownout detection is mandatory.
Availability
MAX6834FXRD1+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered wearables, low-voltage microcontroller systems, and energy-harvesting edge nodes requiring stable component supply and long-term lifecycle support.
Supply support for MAX6834FXRD1+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 in industrial, automotive, and consumer markets.
The MAX6832–MAX6840 family delivers ultra-low-voltage supervisory circuits targeting portable and battery-operated systems requiring high-accuracy reset generation with minimal board area and quiescent power.
FAQ
What is the exact reset threshold voltage of MAX6834FXRD1+T and how is it specified?
The MAX6834FXRD1+T has a factory-set reset threshold of 1.050V, with ±2.5% accuracy over the full operating temperature range (-40°C to +85°C). This value is confirmed in the Electrical Characteristics table under "Reset Threshold (VTH)" for suffix F, and applies specifically to the MAX6834 series with FXRD1+T ordering code. The threshold is trimmed during production and does not require external adjustment.
Does MAX6834FXRD1+T include a manual reset (MR) input or RESET-IN pin?
No, MAX6834FXRD1+T does not include a manual reset (MR) input or RESET-IN pin. As confirmed in the Pin Description section and functional diagrams, the MAX6834 variant (SC70-3, open-drain active-low) has only three terminals: GND, RESET, and VCC. MR and RESET-IN are present only on 4-pin variants (e.g., MAX6835–MAX6840), not on MAX6834FXRD1+T.
What is the meaning of the 'D1' in MAX6834FXRD1+T and what timeout period does it specify?
The 'D1' in MAX6834FXRD1+T refers to the active timeout period suffix defined in Table 2 of the datasheet, specifying a typical reset active timeout of 1.5ms. This is the duration RESET remains asserted after VCC rises above the 1.050V threshold. The D1 option is distinct from D0 (70µs), D2 (30ms), D3 (210ms), and D4 (1680ms), and is confirmed for this part number in the Ordering Information table.
Can MAX6834FXRD1+T operate with VCC below 1.2V, and down to what voltage does it guarantee reset functionality?
Yes, MAX6834FXRD1+T operates with VCC as low as 0.55V and guarantees valid reset assertion down to that level. Per the Absolute Maximum Ratings and Electrical Characteristics tables, reset remains functional and RESET output is specified (VOL ≤ 0.15V at ISINK = 15µA) for VCC ≥ 0.55V. Below 0.55V, the device ceases to drive RESET but is not damaged.
Is MAX6834FXRD1+T RoHS-compliant and what does the '+T' suffix indicate?
Yes, MAX6834FXRD1+T is RoHS-compliant. The '+T' suffix explicitly denotes lead-free, halogen-free, and RoHS-compliant packaging per Maxim Integrated's ordering conventions. This replaces the older '-T' suffix and confirms compliance with EU Directive 2011/65/EU and JEDEC J-STD-609 standards, verified in the Package Information section and Maxim's product change notices.
MAX6834FXRD1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- 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:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6834FXRD1+T FAQ
1.How can I place an order for MAX6834FXRD1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6834FXRD1+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 MAX6834FXRD1+T reliable?
The price and inventory of MAX6834FXRD1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6834FXRD1+T is usually 5 days.
3.What payment methods are accepted for MAX6834FXRD1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6834FXRD1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6834FXRD1+T?
MAX6834FXRD1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6834FXRD1+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 MAX6834FXRD1+T?
For technical support, including MAX6834FXRD1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6834FXRD1+T requirements.
6.How does Aetrix verify that MAX6834FXRD1+T is sourced from the original manufacturer or authorized distributors?
All MAX6834FXRD1+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 MAX6834FXRD1+T meets industry standards.
7.What is the process for return or replacement of MAX6834FXRD1+T?
All MAX6834FXRD1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6834FXRD1+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 MAX6834FXRD1+T part is unused and in its original packaging.
Return procedure for MAX6834FXRD1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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