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Analog Devices Inc./Maxim Integrated MAX6834GXRD3+T
- Part No.:
- MAX6834GXRD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6834GXRD3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:37,500
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Product details
Overview
MAX6834GXRD3+T from Maxim Integrated is an ultra-low-voltage, open-drain active-low microprocessor reset circuit in SC70-3 package, designed to monitor +1.11V supply rails with ±2.5% threshold accuracy over temperature and assert reset for 210ms after VCC recovery or manual reset release. It features 7.5µA typical supply current, guaranteed reset validity down to VCC = 0.55V, and immunity to short negative VCC transients - ideal for battery-powered µP systems requiring reliable brownout protection.
For engineers reviewing the MAX6834GXRD3+T datasheet, MAX6834GXRD3+T pinout, MAX6834GXRD3+T application, or MAX6834GXRD3+T equivalent, key selection criteria include its 1.11V factory-set reset threshold (G suffix), 210ms timeout (D3 suffix), open-drain RESET output requiring external pullup, SC70-3 footprint compatibility, and support for bidirectional µP reset I/O interfacing without level-shifting circuitry.
Technical Context
The MAX6834GXRD3+T implements a precision voltage comparator with 444mV internal reference and hysteresis of 0.75% of VTH, monitoring VCC directly without external components. Its reset assertion logic responds to VCC falling below 1.11V or MR deassertion, holding RESET low for exactly 210ms after VCC rises above threshold or MR returns high.
As an open-drain device, it sinks up to 200µA at VCC ≥ 1.5V while asserting reset, enabling flexible pullup to voltages up to 6.0V - supporting level-shifted reset signaling across multiple supply domains. The internal 20kΩ MR pullup eliminates need for external biasing when manual reset is unused.
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 with margin |
| Reset Timeout Period | 210ms - provides sufficient hold time for µP power stabilization and clock lock before release |
| Supply Current | 7.5µA (typ) at VCC = 1.2V - enables multi-year operation in coin-cell–powered systems |
| Reset Output Type | Open-drain active-low - allows wired-OR reset bus sharing and interface with bidirectional µP reset pins |
| VCC Operating Range | 0.55V to 3.6V - guarantees valid reset assertion even during deep brownout or partial power loss |
| MR Input Logic | Active-low with 20kΩ internal pullup - simplifies manual reset implementation using momentary switch to GND |
| Reset Propagation Delay | 60µs max (VCC falling) - ensures fast response to supply collapse without false triggering on noise |
Pinout & Package
MAX6834GXRD3+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 | Primary return path for internal comparator and reset driver; must be low-impedance connection to system ground plane |
| 2 (RESET) | Open-drain active-low reset output | Sinks current only when asserted; requires external pullup resistor (typically 10–100kΩ) to defined logic-high voltage |
| 3 (VCC) | Supply and monitored voltage input | Provides power and serves as the voltage rail under supervision; supports operation down to 0.55V with valid reset output |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.11V reset threshold | Eliminates external resistor divider and calibration, reducing BOM count and layout area in 1.2V systems |
| 210ms fixed reset timeout | Guarantees µP reset hold time exceeds worst-case power-up sequencing requirements for ARM Cortex-M0/M3 cores |
| 7.5µA supply current | Enables integration into always-on sensor nodes with >5-year battery life using CR2032 cells |
| Open-drain RESET with 6.0V tolerant pullup | Permits direct interface to 3.3V or 5V reset buses without level translators or isolation diodes |
| Immunity to <100ns VCC glitches | Prevents spurious resets during switching regulator noise or ESD events without external RC filtering |
Applications
| Battery-Powered Wearables | Low-Voltage Microcontroller Systems |
|---|---|
|
Use Scenario: Smartwatch mainboard powered by 1.2V LDO supplying ARM Cortex-M4F MCU and BLE radio. IC Role / Device Role / Timing Role: Monitors 1.2V core rail and asserts open-drain RESET to shared reset bus, coordinating power-on initialization across SoC and peripheral ICs. Use Value: Prevents firmware crash during Li-ion battery sag below 3.2V by triggering reset at 1.11V with 210ms hold - matching MCU's minimum reset pulse width spec. |
Use Scenario: Industrial sensor node using MSP430FR59xx MCU operating from supercapacitor backup during AC failure. IC Role / Device Role / Timing Role: Detects 1.2V supply collapse and holds RESET low until capacitor recharges above threshold, ensuring deterministic restart. Use Value: 7.5µA quiescent current extends supercapacitor hold-up time by >12 hours versus higher-current supervisors. |
| Portable Medical Devices | Energy-Harvesting IoT Endpoints |
|
Use Scenario: Handheld glucose meter with single AAA cell stepping down to 1.2V for ultra-low-power ADC and display driver. IC Role / Device Role / Timing Role: Provides fail-safe reset during battery voltage droop caused by LCD backlight activation or RF transmission bursts. Use Value: ±2.5% threshold accuracy over temperature ensures consistent trip point across -20°C to +60°C operating range without recalibration. |
Use Scenario: Solar-harvested sensor node using buck-boost converter to regulate 1.2V rail for RISC-V MCU and LoRa transceiver. IC Role / Device Role / Timing Role: Supervises harvested energy storage and initiates controlled shutdown/reset when input energy falls below operational minimum. Use Value: Open-drain output enables direct connection to MCU's bidirectional reset pin, eliminating discrete MOSFET or buffer in reset path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | 1.65V reset threshold, push-pull active-low output, same SC70-3 package | Designed for 1.8V/2.5V systems; lacks open-drain flexibility and bidirectional µP interface capability | Select when higher threshold and simpler drive (no pullup) are acceptable, and 1.2V monitoring is not required |
| TPS3808G12QDBVRQ1 | 1.2V threshold, push-pull active-low, automotive-grade (-40°C to +125°C), 1.5ms timeout | Qualified for automotive use; shorter timeout and no open-drain option limit suitability in portable/bidirectional designs | Choose for AEC-Q100-compliant applications where 1.2V trip point and extended temperature range outweigh open-drain requirement |
Compared with MAX6834GXRD3+T, MAX809TRD3+T offers plug-and-play simplicity but cannot monitor sub-1.6V rails or interface with bidirectional reset pins, while TPS3808G12QDBVRQ1 adds automotive qualification and tighter threshold tolerance at the cost of reduced timeout flexibility and loss of open-drain level-shifting capability.
Availability
MAX6834GXRD3+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered wearables, low-voltage microcontroller systems, and energy-harvesting IoT endpoints requiring stable component supply with full RoHS compliance and tape-and-reel packaging.
Supply support for MAX6834GXRD3+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) is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, and interface applications.
The MAX6832–MAX6840 family was designed specifically for ultra-low-voltage µP reset supervision in space- and power-constrained portable electronics, targeting 1.2V–1.8V supply domains with minimal external components.
FAQ
What is the exact reset threshold voltage of the MAX6834GXRD3+T?
The MAX6834GXRD3+T has a factory-set reset threshold of 1.110V, with ±2.5% accuracy over the full operating temperature range of -40°C to +85°C. This value corresponds to the 'G' suffix in the part number and is specified in the Electrical Characteristics table of the MAX6832–MAX6840 datasheet. The threshold remains stable across VCC variations from 0.55V to 3.6V, making it suitable for precise brownout detection in 1.2V systems.
Does the MAX6834GXRD3+T require an external pullup resistor on the RESET pin?
Yes, the MAX6834GXRD3+T features an open-drain active-low RESET output and requires an external pullup resistor to establish a valid logic-high state when reset is not asserted. A typical value is 10kΩ to 100kΩ connected to a voltage rail between 0V and 6.0V. The pullup may be tied to a different supply than VCC to enable level shifting - for example, pulling RESET high to 3.3V while monitoring a 1.2V rail.
What is the reset timeout period for the MAX6834GXRD3+T?
The MAX6834GXRD3+T provides a fixed reset active timeout period of 210ms, indicated by the 'D3' suffix in the part number. This duration begins after VCC rises above the 1.110V threshold or after the manual reset (MR) input is released, and ensures the reset signal remains asserted long enough for microprocessors to complete power-up initialization and clock stabilization.
Can the MAX6834GXRD3+T monitor supply voltages below 1.2V?
No - the MAX6834GXRD3+T is factory-trimmed for a 1.110V threshold and operates with VCC as low as 0.55V, but it does not support adjustable thresholds. For sub-1.1V monitoring, the MAX6838/MAX6839/MAX6840 series with RESET-IN pin (444mV reference) should be used instead. The MAX6834GXRD3+T is optimized for nominal 1.2V systems where 1.110V provides appropriate hysteresis margin.
Is the MAX6834GXRD3+T compatible with bidirectional microprocessor reset pins?
Yes - the open-drain RESET output of the MAX6834GXRD3+T enables direct connection to bidirectional µP reset I/O pins using a single external pullup resistor. This configuration allows either the MAX6834GXRD3+T or the µP itself to assert reset on the shared line, supporting system-level reset coordination without additional logic or isolation components.
MAX6834GXRD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- 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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6834GXRD3+T FAQ
1.How can I place an order for MAX6834GXRD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6834GXRD3+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 MAX6834GXRD3+T reliable?
The price and inventory of MAX6834GXRD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6834GXRD3+T is usually 5 days.
3.What payment methods are accepted for MAX6834GXRD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6834GXRD3+T transactions.
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4.How is shipping managed for MAX6834GXRD3+T?
MAX6834GXRD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6834GXRD3+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 MAX6834GXRD3+T?
For technical support, including MAX6834GXRD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6834GXRD3+T requirements.
6.How does Aetrix verify that MAX6834GXRD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6834GXRD3+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 MAX6834GXRD3+T meets industry standards.
7.What is the process for return or replacement of MAX6834GXRD3+T?
All MAX6834GXRD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6834GXRD3+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 MAX6834GXRD3+T part is unused and in its original packaging.
Return procedure for MAX6834GXRD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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