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Analog Devices Inc./Maxim Integrated MAX6834GXRD0+T
- Part No.:
- MAX6834GXRD0+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6834GXRD0+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,990
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Product details
Overview
MAX6834GXRD0+T from Maxim Integrated is an ultra-low-voltage, open-drain active-low microprocessor reset circuit in SC70-3 package, designed to monitor +1.1V to +3.3V supplies with factory-set 1.110V reset threshold and 70µs 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 requiring reliable brownout protection.
For engineers reviewing the MAX6834GXRD0+T datasheet, MAX6834GXRD0+T pinout, MAX6834GXRD0+T application, or MAX6834GXRD0+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 MAX6834GXRD0+T implements a precision voltage comparator with 444mV internal reference, comparing VCC against a factory-trimmed threshold (1.110V) with 0.75% hysteresis. Its reset assertion logic includes fixed 70µs timeout after VCC recovery and ignores fast transients via built-in glitch rejection.
This device uses BiCMOS process (681 transistors), features internal MR pullup (20kΩ), and supports level-shifting via external pullup on open-drain RESET - enabling interface to higher-voltage reset circuitry even when monitoring sub-1.2V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.110V ±2.5% over -40°C to +85°C - ensures accurate brownout detection for 1.2V core supplies |
| Timeout Period | 70µs - provides minimum reset pulse width compliant with fast-start µPs and digital logic |
| Supply Current | 7.5µA typical at +25°C - enables multi-year operation in coin-cell–powered devices |
| Operating Voltage Range | +0.55V to +3.6V - guarantees reset validity during deep power-down and startup ramp |
| Output Type | Open-drain active-low RESET - allows wired-OR configuration and level-shifting up to +6V |
| VCC Immunity | Immune to <100ns negative transients - prevents false resets in noisy DC/DC environments |
| Reset Propagation Delay | 70µs max - deterministic timing for synchronous system initialization |
Pinout & Package
MAX6834GXRD0+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 = 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 requiring external pullup; sinks up to 200µA at VCC ≥1.5V when asserted |
| 3 | VCC | Monitored supply input and power source; operates from 0.55V to 3.6V; powers internal circuitry and defines reset threshold scaling |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.110V threshold | Eliminates external resistor networks and calibration for 1.2V supply monitoring |
| 70µs fixed timeout | Meets minimum reset pulse width requirements of ARM Cortex-M0/M3 and RISC-V microcontrollers |
| Open-drain RESET with 6V tolerance | Enables direct interface to 3.3V or 5V reset buses without level translators |
| 7.5µA supply current | Reduces quiescent power by >90% vs. legacy reset ICs, critical for always-on sensor nodes |
| ±2.5% threshold accuracy over temp | Ensures consistent brownout behavior across industrial temperature range without derating |
Applications
| Battery-Powered Wearables | Low-Voltage IoT Sensors |
|---|---|
Use Scenario: Coin-cell–powered fitness tracker with 1.2V MCU core and BLE radio. IC Role / Device Role / Timing Role: Monitors 1.2V LDO output and asserts open-drain RESET to both MCU and radio during brownout. Use Value: Prevents corrupted flash writes and BLE disconnection due to undervoltage, using single 7.5µA component with no external passives. |
Use Scenario: Environmental sensor node powered by energy-harvesting circuit delivering 1.1V–1.3V. IC Role / Device Role / Timing Role: Detects supply collapse below 1.110V and triggers 70µs reset pulse to wake-up controller before shutdown. Use Value: Guarantees clean restart after intermittent power loss, leveraging open-drain output to interface with 3.3V supervisor logic. |
| Portable Medical Devices | Industrial Handheld Terminals |
Use Scenario: FDA-cleared glucose meter using single-cell Li-ion (2.5V–4.2V) with 1.2V buck converter. IC Role / Device Role / Timing Role: Supervises 1.2V core rail; RESET output tied directly to µP's bidirectional reset pin via shared pullup. Use Value: Enables system-level reset coordination without additional logic, meeting IEC 62304 power-fail safety requirements. |
Use Scenario: Ruggedized barcode scanner with 1.8V FPGA and 3.3V interface logic. IC Role / Device Role / Timing Role: Monitors 1.2V FPGA core supply; open-drain RESET pulled up to 3.3V to reset entire subsystem. Use Value: Provides voltage-level translation and fault isolation between domains, eliminating need for discrete MOSFET level shifter. |
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; 140ms timeout; SC70-3 | Designed for 3.3V systems, not sub-1.2V monitoring | Select only if supervising >2.9V rails and requiring no external pullup |
| TPS3123QDBVRQ1 | Open-drain active-low; 1.12V threshold; 200ms timeout; SOT-23-3 | Automotive AEC-Q100 qualified; higher quiescent current (12µA) | Choose for automotive-grade reliability where 200ms timeout is acceptable |
Compared with MAX6834GXRD0+T, MAX809TRD1+T lacks sub-1.2V support and open-drain flexibility, while TPS3123QDBVRQ1 trades lower power and tighter threshold tolerance for longer timeout and automotive qualification - making MAX6834GXRD0+T optimal for space- and power-constrained 1.2V portable designs.
Availability
MAX6834GXRD0+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered wearables, low-voltage IoT sensors, and industrial handheld terminals requiring stable component supply across long production lifecycles.
Supply support for MAX6834GXRD0+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, acquired by Analog Devices in 2021.
The MAX6832–MAX6840 product line delivers ultra-low-voltage reset supervision for next-generation portable and energy-constrained systems, targeting applications where traditional reset ICs fail below 1.2V.
FAQ
What is the exact reset threshold voltage of the MAX6834GXRD0+T?
The MAX6834GXRD0+T has a factory-set reset threshold of 1.110V with ±2.5% accuracy over the full -40°C to +85°C temperature range. This value is confirmed in the Electrical Characteristics table of the official datasheet (Rev 2, 12/05), under the "G" suffix entry for MAX6834. The threshold remains stable due to internal 444mV reference and trimming.
Does the MAX6834GXRD0+T require an external pullup resistor on the RESET pin?
Yes, the MAX6834GXRD0+T requires an external pullup resistor on its open-drain RESET pin because it cannot drive high actively. The datasheet specifies that the pullup may connect to any voltage between 0V and +6.0V, enabling level-shifting. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements.
Can the MAX6834GXRD0+T monitor supply voltages below 1.1V?
No - the MAX6834GXRD0+T is specified for operation with VCC from +0.55V to +3.6V, but its reset comparator accuracy is guaranteed only for VCC ≥1.1V (per Electrical Characteristics footnote). Below 1.1V, threshold accuracy degrades, and the device does not assert reset reliably. For sub-1.1V monitoring, MAX6838/MAX6839/MAX6840 with RESET-IN pin are required.
What is the minimum VCC voltage at which the MAX6834GXRD0+T guarantees a valid RESET output?
The MAX6834GXRD0+T guarantees valid RESET output down to VCC = 0.55V, as stated in the Absolute Maximum Ratings and Electrical Characteristics tables. At VCC < 0.55V, the 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 per Figure 3 in the datasheet.
Is the MAX6834GXRD0+T pin-compatible with other members of the MAX6832–MAX6840 family?
Yes - the MAX6834GXRD0+T shares identical SC70-3 pinout (GND, RESET, VCC) with MAX6832 and MAX6833 variants. However, output type differs: MAX6834GXRD0+T uses open-drain active-low, while MAX6832 uses push-pull active-low and MAX6833 uses push-pull active-high. Swapping requires verifying external pullup/pulldown and logic polarity compatibility.
MAX6834GXRD0+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:
- Obsolete
- 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:
- 70µs Typical
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6834GXRD0+T FAQ
1.How can I place an order for MAX6834GXRD0+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6834GXRD0+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 MAX6834GXRD0+T reliable?
The price and inventory of MAX6834GXRD0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6834GXRD0+T is usually 5 days.
3.What payment methods are accepted for MAX6834GXRD0+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6834GXRD0+T transactions.
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4.How is shipping managed for MAX6834GXRD0+T?
MAX6834GXRD0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6834GXRD0+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 MAX6834GXRD0+T?
For technical support, including MAX6834GXRD0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6834GXRD0+T requirements.
6.How does Aetrix verify that MAX6834GXRD0+T is sourced from the original manufacturer or authorized distributors?
All MAX6834GXRD0+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 MAX6834GXRD0+T meets industry standards.
7.What is the process for return or replacement of MAX6834GXRD0+T?
All MAX6834GXRD0+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6834GXRD0+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 MAX6834GXRD0+T part is unused and in its original packaging.
Return procedure for MAX6834GXRD0+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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