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Analog Devices Inc./Maxim Integrated MAX6834HXRD0+
- Part No.:
- MAX6834HXRD0+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6834HXRD0+.pdf
- Description:
- MAX6834 ULTRA-LOW-VOLTAGE VOLTAG
- Quantity:
- Payment:
- Shipping:
Inventory:1,495
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Product details
Overview
MAX6834HXRD0+ from Maxim Integrated is an ultra-low-voltage microprocessor supervisory circuit with open-drain active-low reset output, factory-set 1.313V reset threshold, 70µs timeout period (D0 suffix), and guaranteed operation down to VCC = 0.55V. It monitors +1.2V to +1.8V logic supplies in portable systems and provides immunity to short VCC transients. Designed for battery-powered µP power monitoring, it eliminates external components while ensuring reliable reset assertion during brownout.
For engineers reviewing the MAX6834HXRD0+ datasheet, MAX6834HXRD0+ pinout, MAX6834HXRD0+ application, or MAX6834HXRD0+ equivalent, this device serves as a low-power (7.5µA typ), SC70-3 packaged voltage detector optimized for space-constrained embedded systems requiring precise low-threshold reset control and bidirectional reset I/O compatibility.
Technical Context
The MAX6834HXRD0+ implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy over –40°C to +85°C and 0.75% hysteresis. 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 +3.3V or +5V.
It features fixed 70µs reset timeout (voltage detector mode), operates with VCC as low as 0.55V while asserting valid RESET, and rejects sub-100ns MR glitches. The device uses BiCMOS process (681 transistors) and includes internal 20kΩ MR pullup but no RESET-IN pin - confirming it belongs to the MAX6832–MAX6837 group, not the adjustable-threshold MAX6838–MAX6840 series.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.313V ±2.5% - precisely matches 1.3V nominal supply rails; enables stable reset at low-voltage logic nodes |
| Timeout Period | 70µs - shortest available delay; suitable for fast power-rail validation and voltage-detection-only use cases |
| Supply Current | 7.5µA (typ) at VCC = 1.2V - enables multi-year battery life in always-on monitoring applications |
| Operating VCC Range | 0.55V to 3.6V - guarantees functional reset assertion even during deep brownout conditions |
| Output Type | Open-drain active-low RESET - allows wired-OR configuration and interface with bidirectional µP reset pins |
| Package | 3-pin SC70 - 2.0mm × 2.1mm footprint; compatible with high-density PCB layouts and automated assembly |
| Temperature Range | –40°C to +85°C - qualified for industrial and extended-temperature embedded deployments |
Pinout & Package
MAX6834HXRD0+ is housed in a 3-pin SC70 package (pin-compatible with MAX803/MAX809/MAX810). 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 - confirming its role as a minimal-footprint voltage detector without manual reset or adjustable threshold capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for internal comparator and output stage; must be low-impedance to ensure accurate threshold sensing |
| 2 - RESET | Open-drain active-low reset output | Drives low when VCC < 1.313V; requires external pullup resistor; enables shared reset bus with other open-drain devices |
| 3 - VCC | Supply and monitored voltage input | Both powers the IC and serves as the monitored rail; valid operation supported down to 0.55V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.313V threshold | Eliminates external resistor divider; ensures ±2.5% accuracy across temperature for predictable 1.3V system reset points |
| 70µs reset timeout | Provides fastest response among MAX6832–MAX6840 family - ideal for voltage detection without timing delay |
| 0.55V VCC minimum | Guarantees RESET remains asserted until supply collapses fully - prevents premature release during deep undervoltage |
| 7.5µA supply current | Reduces quiescent load on coin-cell or energy-harvesting sources; enables continuous monitoring in sleep-mode systems |
| SC70-3 package | 2.0mm × 2.1mm footprint saves >50% board area vs. SOT-23; supports fine-pitch reflow and high-volume pick-and-place |
Applications
| Portable Power Monitoring | Low-Voltage µP Reset |
|---|---|
|
Use Scenario: Monitoring +1.3V core supply in Bluetooth LE sensor node powered by CR2032 battery. IC Role / Device Role / Timing Role: Voltage detector asserting open-drain RESET to ARM Cortex-M0+ during brownout. Use Value: Prevents code corruption by holding µP in reset until VCC recovers above 1.313V; 70µs response enables rapid power-cycle recovery. |
Use Scenario: Ensuring deterministic startup of FPGA-configured SoC operating at 1.2V I/O and 1.3V core. IC Role / Device Role / Timing Role: Supervisory circuit generating clean, glitch-immune reset pulse synchronized to 1.3V rail stabilization. Use Value: ±2.5% threshold tolerance avoids marginal reset release; open-drain output interfaces directly with FPGA's bidirectional PROG_B pin. |
| Battery-Fuel Gauge Interface | Industrial Sensor Node |
|
Use Scenario: Coupling with fuel gauge IC that requires precise 1.3V trip point to trigger low-battery shutdown. IC Role / Device Role / Timing Role: Threshold comparator feeding enable signal to PMIC's LDO disable input via pullup to 3.3V domain. Use Value: Open-drain architecture allows level-shifted control - VCC = 1.3V monitored, RESET pulled up to 3.3V system rail. |
Use Scenario: Remote environmental monitor using LoRaWAN MCU with strict 1.3V supply tolerance and ESD-prone wiring. IC Role / Device Role / Timing Role: Brownout protector rejecting sub-100ns transients induced by relay switching or RF coupling. Use Value: Immunity to fast VCC glitches prevents spurious resets; SC70-3 package withstands thermal cycling in uncontrolled enclosures. |
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 |
|---|---|---|---|
| MAX809HTR | 1.3V threshold, 140ms timeout, push-pull active-low output, SOT-23-3 package | Lacks open-drain flexibility; cannot interface with bidirectional reset pins or level-shift across supplies | Select when fixed long timeout and simpler drive (no pullup) are acceptable; avoid if shared reset bus or multi-supply level shifting is required |
| TPS3801K33DBVR | 3.3V threshold (not 1.313V), 200ms timeout, open-drain active-low, SOT-23-3 | Designed for higher-voltage rails; incompatible with 1.3V monitoring without external divider | Use only with ≥3.0V supplies; unsuitable as direct replacement due to mismatched threshold and lack of low-voltage qualification |
Compared with MAX6834HXRD0+, MAX809HTR offers simpler drive but sacrifices design flexibility, while TPS3801K33DBVR targets different voltage domains entirely - neither provides the combination of 1.313V precision, 70µs speed, open-drain output, and 0.55V operational floor in SC70-3.
Availability
MAX6834HXRD0+ is available at Aetrix Electronics and suitable for portable equipment, low-voltage µP reset, and battery-fuel gauge interface applications requiring stable component supply, consistent lead-free compliance, and long-term industrial availability.
Supply support for MAX6834HXRD0+ 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, computing, and communications systems.
The MAX6832–MAX6840 product line delivers ultra-low-voltage supervisory circuits targeting space- and power-constrained embedded systems where traditional reset ICs fail to operate reliably below 1.5V.
FAQ
What is the exact reset threshold voltage of the MAX6834HXRD0+?
The MAX6834HXRD0+ has a factory-set reset threshold of 1.313V with ±2.5% accuracy over –40°C to +85°C. This value is confirmed by the 'H' suffix in the part number per the Threshold Suffix Guide (Table 1), and is specified in the Electrical Characteristics table under VTH for MAX6834. The device asserts RESET when VCC falls below this precise voltage and holds it active for 70µs after VCC rises above threshold.
Does the MAX6834HXRD0+ include a manual reset (MR) input?
No, the MAX6834HXRD0+ does not include a manual reset (MR) input. Per the Pin Description section and ordering table, only MAX6835/MAX6836/MAX6837 variants feature MR. The MAX6834HXRD0+ is a 3-pin SC70 device with GND, RESET, and VCC only - confirmed by its absence in the MR column of the pin tables and omission from MR-related features in the datasheet.
What is the purpose of the D0 suffix in MAX6834HXRD0+?
'D0' denotes the 70µs reset timeout period, the shortest option in the MAX6832–MAX6840 family. As defined in Table 2 (Active Timeout Period Guide), D0 configures the device for voltage-detection-only operation - ideal when rapid response is needed without extended reset hold time. This distinguishes MAX6834HXRD0+ from D1 (1.5ms), D2 (30ms), etc., versions of the same base part.
Can the MAX6834HXRD0+ operate with VCC below 1.0V?
Yes, the MAX6834HXRD0+ is fully specified to operate down to VCC = 0.55V. The Absolute Maximum Ratings and Electrical Characteristics confirm guaranteed RESET assertion validity at this level. Its ability to function at sub-1.0V enables use in ultra-low-power states and deep brownout scenarios where other reset ICs lose functionality - critical for energy-harvesting and coin-cell applications.
Is the MAX6834HXRD0+ pin-compatible with legacy Maxim reset ICs?
Yes, the MAX6834HXRD0+ is pin-compatible with MAX803/MAX809/MAX810 series devices in SC70-3 and SOT-23-3 packages. The datasheet explicitly states "Pin Compatible with MAX803/MAX809/MAX810…" and confirms identical 3-pin SC70 pinout (GND, RESET, VCC). This allows drop-in replacement in existing layouts without PCB revision - provided the open-drain output and 1.313V threshold meet system requirements.
MAX6834HXRD0+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.313V
- 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
MAX6834HXRD0+ FAQ
1.How can I place an order for MAX6834HXRD0+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6834HXRD0+ 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 MAX6834HXRD0+ reliable?
The price and inventory of MAX6834HXRD0+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6834HXRD0+ is usually 5 days.
3.What payment methods are accepted for MAX6834HXRD0+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6834HXRD0+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6834HXRD0+?
MAX6834HXRD0+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6834HXRD0+ 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 MAX6834HXRD0+?
For technical support, including MAX6834HXRD0+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6834HXRD0+ requirements.
6.How does Aetrix verify that MAX6834HXRD0+ is sourced from the original manufacturer or authorized distributors?
All MAX6834HXRD0+ 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 MAX6834HXRD0+ meets industry standards.
7.What is the process for return or replacement of MAX6834HXRD0+?
All MAX6834HXRD0+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6834HXRD0+, 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 MAX6834HXRD0+ part is unused and in its original packaging.
Return procedure for MAX6834HXRD0+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6834HXRD0+ Tags
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MIC826SYMT-TR
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APX803S-31SA-7
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APX803L20-29SA-7
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