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Analog Devices Inc./Maxim Integrated MAX6834FXRD0
- Part No.:
- MAX6834FXRD0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6834FXRD0.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,345
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Product details
Overview
MAX6834FXRD0 from Maxim Integrated is an ultra-low-voltage microprocessor supervisory circuit with open-drain active-low reset output, factory-set 1.050V reset threshold, and 70µs timeout period (D0 option), designed for reliable power-on reset and brownout detection in +1.2V to +1.8V digital systems. It operates down to VCC = 0.55V, consumes only 7.5µA typical supply current, and is housed in a 3-pin SC70 package.
For engineers reviewing the MAX6834FXRD0 datasheet, MAX6834FXRD0 pinout, MAX6834FXRD0 application, or MAX6834FXRD0 equivalent, this device serves as a precision voltage detector and reset generator for low-power µP systems where supply rail integrity must be validated before firmware execution - especially critical in portable, battery-powered, and embedded controllers requiring guaranteed reset assertion during VCC transients.
Technical Context
The MAX6834FXRD0 implements a precision bandgap-based voltage comparator with ±2.5% reset threshold accuracy over –40°C to +85°C, monitoring VCC directly without external components. Its internal reset timer is fixed at 70µs (D0), optimized for fast power-up validation rather than extended hold-off.
This variant belongs to the MAX6834/MAX6837/MAX6840 subgroup featuring open-drain RESET output requiring an external pullup, enabling level-shifting and bidirectional reset interfacing - unlike push-pull variants. It lacks MR input and RESET-IN; its sole inputs are VCC and GND, making it a minimal-footprint, single-supply monitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.050V ±2.5% - ensures reliable reset assertion when monitored +1.2V supply drops below 1.020V, suitable for core logic rails |
| Timeout Period | 70µs - provides minimum reset pulse width sufficient for µP initialization without delaying system boot |
| Supply Current | 7.5µA (typ) at VCC = 1.2V - enables multi-year operation in coin-cell–powered devices |
| VCC Operating Range | 0.55V to 3.6V - guarantees valid reset output down to near-zero supply, critical for graceful shutdown detection |
| Output Type | Open-drain active-low RESET - allows connection to higher-voltage logic domains via external pullup (e.g., 3.3V or 5V) |
| Package | 3-pin SC70 (2.0mm × 2.1mm × 0.95mm) - supports high-density PCB layouts in space-constrained portable designs |
| Temperature Range | –40°C to +85°C - qualified for industrial and automotive cabin-ambient applications |
Pinout & Package
MAX6834FXRD0 is supplied in a 3-pin SC70 package (SOT-323 compatible footprint), with pin 1 = GND, pin 2 = RESET (open-drain), pin 3 = VCC. No manual reset (MR) or RESET-IN pins are present - this is a dedicated VCC-monitoring variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground 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 10kΩ to 100kΩ) to target logic rail voltage |
| 3 | VCC | Monitored supply input and IC power source; also defines reset threshold reference point for internal comparator |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.050V threshold | Eliminates need for external resistor divider or calibration, reducing BOM count and layout area |
| 70µs reset timeout | Meets minimum reset pulse width requirements of modern ARM Cortex-M and RISC-V microcontrollers |
| 0.55V VCC operation limit | Ensures reset remains asserted through full power-down sequence, preventing undefined µP state at low VCC |
| ±2.5% threshold accuracy over temperature | Guarantees consistent trip point across industrial temperature range without derating margins |
| 7.5µA supply current | Enables integration into always-on subsystems (e.g., RTC supervisors, wake-on-event circuits) without battery drain penalty |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Wearable ECG patch powered by CR2032 coin cell, requiring guaranteed reset during battery voltage sag. IC Role / Device Role / Timing Role: Voltage detector asserting active-low RESET to ARM Cortex-M0+ MCU until VCC stabilizes above 1.050V after cold start. Use Value: Prevents firmware crash due to marginal supply; 70µs timeout aligns with MCU's minimum reset pulse requirement while minimizing boot delay. |
Use Scenario: DIN-rail mounted analog input module operating from isolated 1.5V DC-DC converter in harsh factory environment. IC Role / Device Role / Timing Role: Supervisory circuit monitoring 1.5V core rail and generating robust reset signal immune to 100ns VCC glitches. Use Value: ±2.5% threshold tolerance ensures consistent behavior across –40°C to +85°C ambient; open-drain output interfaces directly to 3.3V FPGA reset controller. |
| Low-Power IoT Edge Nodes | Automotive Body Control Units |
|
Use Scenario: NB-IoT sensor node sleeping at 2µA, waking periodically to sample and transmit; must avoid spurious resets during RF transmission current surges. IC Role / Device Role / Timing Role: Ultra-low-quiescent-current supervisor detecting brownout on 1.2V LDO output feeding SoC core domain. Use Value: 7.5µA ICC minimizes sleep-mode current overhead; immunity to short negative VCC transients prevents false resets during GSM burst transmission. |
Use Scenario: Door module MCU powered from 1.3V buck regulator, subject to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Reset generator ensuring µP remains held in reset until 1.3V rail is stable post-cold-crank (battery dip to 6V). Use Value: Valid reset output down to VCC = 0.55V guarantees hold condition even during severe undervoltage; SC70 package withstands reflow and vibration per AEC-Q200. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6834HXRD0 | Higher reset threshold (1.313V) with identical D0 timeout and SC70-3 package | Suitable for +1.5V or +1.8V supply monitoring instead of +1.2V systems | Select when target supply nominal is ≥1.3V; same footprint and timing, no layout change required |
| MAX6832FXRD0 | Push-pull active-low RESET output (no external pullup needed); otherwise identical threshold, timeout, and package | Better suited for single-rail systems where RESET must drive CMOS inputs directly without level translation | Choose when simplicity and reduced external components outweigh need for level-shifting or bidirectional reset capability |
Compared with MAX6834FXRD0, MAX6834HXRD0 shifts the trip point upward for higher-voltage rails, while MAX6832FXRD0 replaces the open-drain output with push-pull - offering lower component count but sacrificing voltage-level flexibility and bidirectional µP interface support.
Availability
MAX6834FXRD0 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, low-power IoT edge nodes, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6834FXRD0 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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.
The MAX6832–MAX6840 family was engineered specifically for ultra-low-voltage microprocessor supervision in space- and power-constrained systems, emphasizing sub-1V operation, nanoscale quiescent current, and SC70 packaging.
FAQ
What is the exact reset threshold voltage of the MAX6834FXRD0?
The MAX6834FXRD0 has a factory-set reset threshold of 1.050V, with ±2.5% accuracy over the full –40°C to +85°C operating temperature range. This value is specified in the Threshold Suffix Guide (suffix 'F') and confirmed in the Electrical Characteristics table under VTH for MAX6834 devices. The threshold is referenced to the VCC pin and remains stable across supply variations within the 0.55V to 3.6V operating range.
Does the MAX6834FXRD0 include a manual reset (MR) input?
No, the MAX6834FXRD0 does not feature a manual reset (MR) input. It is a 3-pin device (GND, RESET, VCC) with no MR or RESET-IN functionality. This distinguishes it from 4-pin variants like MAX6835/MAX6836/MAX6837 (which include MR) and MAX6838/MAX6839/MAX6840 (which include RESET-IN). The MAX6834FXRD0 is strictly a VCC-monitored supervisor with fixed threshold and open-drain output.
What pullup resistor value is recommended for the MAX6834FXRD0's open-drain RESET output?
A 10kΩ to 100kΩ pullup resistor is recommended for the MAX6834FXRD0's open-drain RESET output, connected to the target logic rail (e.g., 1.8V, 3.3V, or 5V). Lower values (e.g., 10kΩ) ensure faster rise time and noise immunity but increase static current; higher values (e.g., 100kΩ) minimize current draw but may slow edge rates. The choice depends on bus capacitance and µP reset input specifications - the MAX6834FXRD0 itself sinks up to 200µA at VCC ≥ 1.5V with VOL ≤ 0.2V.
Can the MAX6834FXRD0 operate reliably during VCC transients?
Yes, the MAX6834FXRD0 is designed to ignore short negative-going VCC transients: it will not assert reset for pulses under 100ns duration at 10mV overdrive, and tolerates up to ~600µs at 200mV overdrive (per Figure 2). Its internal comparator includes built-in immunity to fast supply glitches, making it suitable for noisy environments such as motor drives or switching power supplies - a key reliability feature confirmed in the Applications Information section.
Is the MAX6834FXRD0 pin-compatible with older Maxim reset ICs like the MAX809?
No, the MAX6834FXRD0 is not pin-compatible with the MAX809 series. While the MAX6832–MAX6840 family is stated to be "pin compatible with MAX803/MAX809/MAX810…", that compatibility applies only to the 3-pin SC70 variants *with matching pin functions*. The MAX809 uses pin 1 = VCC, pin 2 = GND, pin 3 = RESET - whereas the MAX6834FXRD0 uses pin 1 = GND, pin 2 = RESET, pin 3 = VCC. Swapping them would cause immediate damage. Always verify pin mapping using the Pin Configurations diagram on page 9 of the datasheet.
MAX6834FXRD0 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:
- 70µs Typical
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6834FXRD0 FAQ
1.How can I place an order for MAX6834FXRD0 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6834FXRD0 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 MAX6834FXRD0 reliable?
The price and inventory of MAX6834FXRD0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6834FXRD0 is usually 5 days.
3.What payment methods are accepted for MAX6834FXRD0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6834FXRD0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6834FXRD0?
MAX6834FXRD0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6834FXRD0 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 MAX6834FXRD0?
For technical support, including MAX6834FXRD0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6834FXRD0 requirements.
6.How does Aetrix verify that MAX6834FXRD0 is sourced from the original manufacturer or authorized distributors?
All MAX6834FXRD0 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 MAX6834FXRD0 meets industry standards.
7.What is the process for return or replacement of MAX6834FXRD0?
All MAX6834FXRD0 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6834FXRD0, 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 MAX6834FXRD0 part is unused and in its original packaging.
Return procedure for MAX6834FXRD0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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