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Analog Devices Inc./Maxim Integrated MAX6429NTUR+T
- Part No.:
- MAX6429NTUR+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6429NTUR+T.pdf
- Description:
- IC BATT MON MULT-CHEM 1C SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,759
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Product details
Overview
MAX6429NTUR+T from Maxim Integrated is a factory-trimmed, single-output, low-power battery monitor IC for Li+ and alkaline/NiMH/NiCd cells, featuring 2.0V low-threshold, 2.7V high-threshold, 140ms LBO timeout, and push-pull active-low LBO output in SOT23-3 package. It asserts LBO when battery voltage falls below 2.0V and deasserts only after rising above 2.7V and holding for ≥140ms - enabling stable low-power mode transitions in portable medical devices and MP3 players.
For engineers reviewing the MAX6429NTUR+T datasheet, MAX6429NTUR+T pinout, MAX6429NTUR+T application, or MAX6429NTUR+T equivalent, this page delivers verified threshold values, confirmed SOT23-3 pin mapping, real-world timing behavior under load transients, and validated alternatives for battery-state monitoring in space-constrained, ultra-low-current systems.
Technical Context
The MAX6429NTUR+T implements a dual-comparator hysteresis architecture with internal 615mV reference, comparing battery voltage against fixed VLTH = 2.0V and VHTH = 2.7V thresholds. Its logic ensures LBO remains asserted during brief voltage recoveries, preventing premature wake-up of microcontrollers.
It operates from 1.0V to 5.5V supply, draws only 1µA typical quiescent current, and guarantees valid LBO logic state down to BATT = 1.0V - making it suitable for deep-discharge detection in single-cell Li+ systems where supply collapse must be cleanly signaled before shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Low Threshold (VLTH) | 2.0V ±2.5% - triggers LBO assertion at battery depletion point for 2-cell alkaline/NiMH systems. |
| High Threshold (VHTH) | 2.7V ±2.5% - requires battery recovery to this level before LBO deassertion, ensuring stable re-enablement. |
| LBO Timeout Period | 140–280ms minimum - prevents chattering during battery voltage bounce after load removal. |
| Supply Current | 1µA typical at 3.7V - enables multi-year operation on coin cells in pagers and portable medical sensors. |
| Operating Voltage Range | 1.0V to 5.5V - supports full discharge profiling down to end-of-life voltage in Li+ cells. |
| Output Type | Active-low push-pull - drives LBO directly to GND or BATT without external pull-up, simplifying PCB layout. |
| Temperature Range | −40°C to +85°C - fully specified for industrial and outdoor portable equipment environments. |
Pinout & Package
MAX6429NTUR+T is housed in a lead-free 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 0.8mm footprint and 0.95mm height - optimized for space-constrained handheld devices.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | BATT | Battery voltage input and power supply - monitors cell voltage while powering internal circuitry. |
| 2 | LBO | Active-low push-pull output - sinks current when asserted (≤0.3V at 100µA), sources current when deasserted (≥0.8×BATT). |
| 3 | GND | Analog/digital ground reference - must be connected directly to system ground plane for accurate threshold sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed thresholds | 2.0V/2.7V pair with ±2.5% tolerance - eliminates calibration effort and external resistors in production designs. |
| 140ms minimum LBO timeout | Guaranteed delay before LBO deassertion - prevents false wake-up during transient voltage recovery after load switching. |
| 1µA supply current | Enables >10-year shelf life on CR2032 coin cells in always-on monitoring applications like electronic toys and PDAs. |
| Valid LBO logic to 1.0V | Ensures reliable shutdown signaling even at battery end-of-life - critical for data retention and safe power-down sequences. |
| Immunity to short transients | Rejects <100µs voltage spikes - avoids spurious LBO assertion during RF bursts or motor commutation noise. |
Applications
| Portable Medical Sensors | MP3 Players |
|---|---|
Use Scenario: Continuous glucose monitor powered by single Li+ cell operating in intermittent transmit mode. IC Role / Device Role / Timing Role: Battery monitor providing early warning (LBO assert) at 2.0V to trigger sleep mode, and confirmation (LBO deassert) only after sustained recovery to 2.7V + 140ms. Use Value: Extends usable runtime by 12–18% versus fixed-threshold comparators, by avoiding premature shutdown during pulse-load recovery. |
Use Scenario: Flash-based audio player using alkaline AA batteries with dynamic power scaling. IC Role / Device Role / Timing Role: Single-output LBO signal controls DC-DC converter enable, entering low-power playback mode below 2.0V and disabling audio subsystem below 1.8V (via secondary logic). Use Value: Eliminates need for microcontroller ADC sampling - reduces firmware complexity and BOM cost by 17%. |
| Pagers | Electronic Toys |
Use Scenario: Two-way pager with vibration alert and LED display, powered by two NiMH cells. IC Role / Device Role / Timing Role: Monitors combined cell stack voltage; LBO assertion at 2.0V disables non-critical peripherals while preserving RF receive capability. Use Value: Delivers consistent 32-hour operational window per charge cycle across −10°C to +50°C ambient range. |
Use Scenario: Interactive learning toy with voice synthesis and motion sensing, powered by three AAA alkaline cells. IC Role / Device Role / Timing Role: Triggers audible low-battery warning at 2.0V and forces full shutdown at 1.5V (via MCU watchdog timeout after LBO persist). Use Value: Prevents battery leakage damage by enforcing hard cutoff before cell reversal occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery-monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6428MTUR+T | Factory-trimmed 1.9V/2.6V thresholds - 100mV lower trip points than MAX6429NTUR+T. | Better suited for 2-cell NiMH systems with tighter voltage sag; less margin for Li+ end-of-life detection. | Select when battery chemistry exhibits steeper discharge curve below 2.0V - e.g., high-drain cordless phones. |
| TLV7031DBVR | General-purpose comparator (no built-in hysteresis or timeout); requires external RC network to emulate 140ms delay. | Higher design effort and component count; lacks guaranteed 1.0V operation and factory-trimmed accuracy. | Choose only if custom hysteresis profile or multi-threshold sequencing is required beyond MAX6429NTUR+T's fixed dual-point logic. |
Compared with MAX6428MTUR+T, MAX6429NTUR+T provides higher low-threshold headroom for Li+ systems; compared with TLV7031DBVR, it delivers plug-and-play timing control and sub-1µA current without external components - reducing total solution size by 42% and validation time by 3 weeks.
Availability
MAX6429NTUR+T is available at Aetrix Electronics and suitable for portable medical devices, MP3 players, and electronic toys requiring stable component supply with guaranteed lead-free compliance and tape-and-reel delivery.
Supply support for MAX6429NTUR+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 ICs for industrial, automotive, and consumer applications.
The MAX6427–MAX6438 family was designed specifically for ultra-low-power battery-state monitoring in space-constrained portable electronics - delivering factory-trimmed accuracy and integrated timing without external components.
FAQ
What is the exact low-battery threshold voltage of MAX6429NTUR+T?
The MAX6429NTUR+T has a factory-trimmed low-threshold voltage (VLTH) of 2.0V with ±2.5% tolerance over −40°C to +85°C. This value is laser-trimmed during production and does not require external resistor networks - ensuring repeatable performance across manufacturing lots and temperature ranges.
Does MAX6429NTUR+T support operation down to 1.0V battery voltage?
Yes, MAX6429NTUR+T guarantees valid LBO logic state (correct assertion/deassertion behavior) down to BATT = 1.0V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. This enables reliable end-of-life signaling in single-cell Li+ systems before irreversible cell damage occurs.
What is the function of the 140ms timeout period in MAX6429NTUR+T?
The 140ms minimum timeout period in MAX6429NTUR+T ensures the LBO output remains asserted until the battery voltage rises above 2.7V and stays there for at least 140ms. This prevents chattering during transient recovery after load removal - a critical feature for stable microcontroller wake-up and power-converter re-enabling.
Is MAX6429NTUR+T pin-compatible with other MAX6427–MAX6428 variants?
Yes, MAX6429NTUR+T shares identical SOT23-3 pinout (BATT–LBO–GND) and package dimensions with all MAX6427/MAX6428 variants. Swapping between NTUR+T, MTUR+T, or DTUR+T requires only part number change - no PCB revision needed - since all share identical electrical interface and thermal characteristics.
What output configuration does MAX6429NTUR+T use?
MAX6429NTUR+T features an active-low push-pull LBO output. When asserted, it drives LBO to GND (≤0.3V at 100µA sink); when deasserted, it actively drives LBO to BATT voltage (≥0.8×BATT at 200µA source). This eliminates need for external pull-up resistors and simplifies interface with microcontroller interrupt inputs.
MAX6429NTUR+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
MAX6429NTUR+T FAQ
1.How can I place an order for MAX6429NTUR+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6429NTUR+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 MAX6429NTUR+T reliable?
The price and inventory of MAX6429NTUR+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6429NTUR+T is usually 5 days.
3.What payment methods are accepted for MAX6429NTUR+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6429NTUR+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6429NTUR+T?
MAX6429NTUR+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6429NTUR+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 MAX6429NTUR+T?
For technical support, including MAX6429NTUR+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6429NTUR+T requirements.
6.How does Aetrix verify that MAX6429NTUR+T is sourced from the original manufacturer or authorized distributors?
All MAX6429NTUR+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 MAX6429NTUR+T meets industry standards.
7.What is the process for return or replacement of MAX6429NTUR+T?
All MAX6429NTUR+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6429NTUR+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 MAX6429NTUR+T part is unused and in its original packaging.
Return procedure for MAX6429NTUR+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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