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Analog Devices Inc./Maxim Integrated MAX6429ORUR+T
- Part No.:
- MAX6429ORUR+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6429ORUR+T.pdf
- Description:
- IC BATT MON MULT-CHEM 1C SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,297
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Product details
Overview
MAX6429ORUR+T from Maxim Integrated is a factory-trimmed, single-output, low-power battery monitor IC for Li+ and alkaline/NiMH/NiCd power supplies. It features a fixed low-threshold of 2.1V (±2.5%), high-threshold of 2.3V (±2.5%), 140ms minimum LBO timeout, 1µA typical supply current, and operates from 1.0V to 5.5V - enabling reliable low-battery detection in portable medical devices and pagers.
For engineers reviewing the MAX6429ORUR+T datasheet, MAX6429ORUR+T pinout, MAX6429ORUR+T application, or MAX6429ORUR+T equivalent, this device delivers deterministic hysteresis-based battery state signaling with guaranteed valid logic down to BATT = 1.0V, push-pull LBO output referenced to battery voltage, and SOT23-3 footprint compatibility for space-constrained designs.
Technical Context
The MAX6429ORUR+T implements a dual-comparator architecture with internal 615mV reference, comparing battery voltage against factory-trimmed VLTH = 2.1V and VHTH = 2.3V thresholds. Its hysteresis (200mV nominal) prevents chattering during battery recovery, and the 140ms timeout ensures stable assertion/deassertion only after supply stabilization.
It uses BATT as both power source and monitored input, eliminating external components. The push-pull LBO output drives directly to BATT rail, supporting interface with microcontrollers or power management logic without pull-up resistors or level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.0V to 5.5V - supports operation down to near-dead battery (1.0V), critical for end-of-life detection in single-cell systems. |
| Low Threshold (VLTH) | 2.1V ±2.5% - factory-trimmed trip point indicating battery weakness; triggers LBO assertion on falling BATT. |
| High Threshold (VHTH) | 2.3V ±2.5% - factory-trimmed release point; LBO deasserts only after BATT rises above this value and holds for ≥140ms. |
| Supply Current | 1µA typical - enables multi-year battery life in always-on monitoring applications like remote sensors or medical wearables. |
| LBO Timeout Period | 140–280ms - guarantees output stability before enabling processor wake-up or DC-DC converter restart, preventing false reboots. |
| Operating Temperature | -40°C to +85°C - fully specified across industrial temperature range for use in outdoor or automotive-adjacent portable equipment. |
| Output Type | Active-low push-pull - provides rail-to-rail drive capability without external pull-up, simplifying PCB layout and reducing component count. |
Pinout & Package
MAX6429ORUR+T is housed in a lead-free 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint and 1.45mm max height - optimized for ultra-compact battery-powered assemblies.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | BATT | Battery voltage input and primary power supply; monitored directly by internal comparators; supports operation down to 1.0V. |
| 2 | LBO | Active-low push-pull low-battery output; sinks current when asserted (BATT ≤ 2.1V); drives high to BATT when deasserted (BATT ≥ 2.3V + timeout). |
| 3 | GND | Analog and digital ground reference; must be connected to system battery return path for accurate threshold tracking. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed thresholds | 2.1V low / 2.3V high with ±2.5% tolerance - eliminates calibration effort and external resistor networks for consistent, production-ready battery monitoring. |
| 140ms minimum timeout | Guaranteed delay before LBO deassertion - prevents premature system wake-up during transient voltage recovery after load removal. |
| 1µA typical supply current | Enables >10-year battery life in coin-cell-powered devices operating at 10µA average system current. |
| Push-pull LBO output | Drives directly to BATT rail - removes need for external pull-up resistors and avoids leakage-induced false asserts in high-impedance interfaces. |
| Valid logic to 1.0V BATT | Ensures deterministic LBO state even during deep discharge - critical for safe shutdown sequencing in medical or safety-critical portable instruments. |
Applications
| Portable Medical Devices | Pagers |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring precise low-battery warning before sensor data loss. IC Role / Device Role / Timing Role: Battery monitor providing hysteresis-stabilized LBO signal to microcontroller's NMI pin for graceful data save and shutdown. Use Value: 2.1V/2.3V thresholds align with CR2032 discharge curve; 1µA quiescent current extends usable battery life by >12 months. |
Use Scenario: Two-way alphanumeric pager using single AA alkaline cell, needing reliable "low battery" alert before message loss. IC Role / Device Role / Timing Role: Single-output voltage monitor asserting LBO to disable RF receiver and backlight when battery drops below 2.1V. Use Value: Push-pull output drives pager's enable logic directly; 140ms timeout prevents false alerts during brief voltage sags under transmit load. |
| Cell Phones (Legacy) | Electronic Toys |
Use Scenario: Feature phone with removable Li+ battery, requiring hardware-level low-battery indication independent of firmware. IC Role / Device Role / Timing Role: Standalone battery monitor interfacing to baseband processor's GPIO, asserting LBO at 2.1V to trigger UI warning and prevent unexpected shutdown. Use Value: Factory-trimmed thresholds ensure consistent behavior across production units; -40°C to +85°C rating covers all environmental use cases. |
Use Scenario: Voice-activated learning toy powered by two AA alkaline cells, needing audible low-battery prompt before motor/audio failure. IC Role / Device Role / Timing Role: Primary battery health detector feeding LBO signal to toy's audio controller to play "replace batteries" voice clip. Use Value: Valid operation down to 1.0V allows full utilization of alkaline cell capacity; SOT23-3 footprint minimizes PCB area in cost-sensitive consumer design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6428ORUR+T | Same SOT23-3 package and temperature range, but open-drain LBO output instead of push-pull. | Requires external pull-up resistor; suitable when interfacing to higher-voltage logic (e.g., 3.3V MCU I/O) or wired-OR configurations. | Select MAX6428ORUR+T only if system requires open-drain flexibility or level translation; otherwise MAX6429ORUR+T reduces BOM count. |
| TLV7031DBVR | Single comparator with 1.8V reference, no built-in hysteresis or timeout; requires external RC network for timing and resistor divider for thresholds. | Higher design complexity and board area; used where custom threshold tuning or multi-rail monitoring is needed beyond fixed 2.1V/2.3V. | Choose TLV7031DBVR only for non-standard thresholds or dual-supply monitoring; MAX6429ORUR+T delivers plug-and-play reliability for standard Li+/alkaline use. |
Compared with MAX6428ORUR+T and TLV7031DBVR, MAX6429ORUR+T offers lowest system integration effort - no external components, deterministic timeout, and push-pull drive eliminate layout dependencies while ensuring robust low-battery signaling across temperature and battery chemistries.
Availability
MAX6429ORUR+T is available at Aetrix Electronics and suitable for portable medical devices, pagers, legacy cell phones, and electronic toys requiring stable component supply with long-term lifecycle support and traceable sourcing.
Supply support for MAX6429ORUR+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 high-performance analog, mixed-signal, and power management solutions for industrial, medical, and portable applications.
The MAX6427–MAX6438 family was designed specifically for ultra-low-power battery state monitoring in space- and energy-constrained portable electronics, delivering factory-calibrated accuracy without external components.
FAQ
What is the exact low-battery threshold voltage for MAX6429ORUR+T?
The MAX6429ORUR+T has a factory-trimmed low-threshold voltage (VLTH) of 2.1V with ±2.5% tolerance over temperature. This value is laser-trimmed during production and does not require external calibration. The corresponding high-threshold (VHTH) is 2.3V ±2.5%, defining the hysteresis band that prevents output oscillation during battery voltage fluctuations. These values are confirmed in the Electrical Characteristics table of the MAX6429ORUR+T datasheet.
Does MAX6429ORUR+T require external resistors or capacitors to operate?
No, MAX6429ORUR+T requires no external components. It integrates a precision 615mV reference, dual comparators, timing circuitry, and push-pull output driver. The BATT pin serves as both power supply and monitored input, and the LBO output drives directly to the battery rail. This zero-component operation is validated for the MAX6427–MAX6432 series, including MAX6429ORUR+T, per the datasheet's Typical Operating Circuit and Applications Information sections.
What is the function of the 140ms timeout period in MAX6429ORUR+T?
The 140ms minimum timeout period in MAX6429ORUR+T ensures the LBO output remains asserted for at least 140ms after BATT rises above the high threshold (2.3V), and remains deasserted for at least 140ms after BATT falls below the low threshold (2.1V). This prevents false deassertion during transient voltage recovery - such as when load is removed and battery voltage rebounds - guaranteeing stable control signals for microprocessor wake-up or power converter enable logic.
Can MAX6429ORUR+T operate with a 1.0V battery supply?
Yes, MAX6429ORUR+T is fully specified to operate with BATT as low as 1.0V. Its internal circuitry maintains valid logic states and guaranteed LBO functionality down to this voltage, as stated in the Absolute Maximum Ratings and Electrical Characteristics tables. This capability enables complete discharge utilization of alkaline and NiMH cells, and supports safe shutdown sequencing in medical and safety-critical portable devices using MAX6429ORUR+T.
What package type and pin configuration does MAX6429ORUR+T use?
MAX6429ORUR+T uses a 3-pin SOT23-3 package (JEDEC MO-178AA) with top-mark "FZLG". Pin 1 is BATT (battery input/power), Pin 2 is LBO (active-low push-pull output), and Pin 3 is GND. This configuration is explicitly shown in the Pin Configurations section of the MAX6429ORUR+T datasheet and matches the MAX6427/MAX6428/MAX6429 group schematic symbol and physical outline drawing.
MAX6429ORUR+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Battery Monitor
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 1
- Fault Protection:
- -
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6429ORUR+T FAQ
1.How can I place an order for MAX6429ORUR+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6429ORUR+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 MAX6429ORUR+T reliable?
The price and inventory of MAX6429ORUR+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6429ORUR+T is usually 5 days.
3.What payment methods are accepted for MAX6429ORUR+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6429ORUR+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6429ORUR+T?
MAX6429ORUR+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6429ORUR+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 MAX6429ORUR+T?
For technical support, including MAX6429ORUR+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6429ORUR+T requirements.
6.How does Aetrix verify that MAX6429ORUR+T is sourced from the original manufacturer or authorized distributors?
All MAX6429ORUR+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 MAX6429ORUR+T meets industry standards.
7.What is the process for return or replacement of MAX6429ORUR+T?
All MAX6429ORUR+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6429ORUR+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 MAX6429ORUR+T part is unused and in its original packaging.
Return procedure for MAX6429ORUR+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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