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Analog Devices Inc./Maxim Integrated MAX6432FJUS-T
- Part No.:
- MAX6432FJUS-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6432FJUS-T.pdf
- Description:
- IC BAT MON MULT-CHEM 2C SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
The MAX6432FJUS-T from Maxim Integrated is a dual-output, factory-trimmed battery monitor IC for single Li+ or multi-cell alkaline/NiMH/NiCd power supplies, featuring two active-low open-drain low-battery outputs (LBOH and LBOL), 140ms minimum timeout period, ±2.5% threshold accuracy over temperature, and 1µA typical supply current. It operates from 1.6V to 5.5V and supports battery-good/weak/empty state indication in portable medical devices and cordless phones.
For engineers reviewing the MAX6432FJUS-T datasheet, MAX6432FJUS-T pinout, MAX6432FJUS-T application, or MAX6432FJUS-T equivalent, this device delivers precise dual-threshold monitoring with no external components required, stable operation down to BATT = 1.0V, and guaranteed logic validity across -40°C to +85°C.
Technical Context
The MAX6432FJUS-T implements two independent comparators with internal hysteresis and fixed factory-trimmed thresholds: VHTH− (e.g., 2.6V–3.1V range) for LBOH assertion and VLTH− (e.g., 1.6V–2.1V range) for LBOL assertion, each with corresponding deassertion thresholds VHTH+ and VLTH+. Its 140ms minimum timeout ensures output stability after voltage recovery.
It uses BATT as both input and power source, requires no external resistors or references, and features open-drain outputs compatible with pull-up voltages up to 5.5V-enabling direct interface to higher-voltage microcontrollers while operating from the monitored battery rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6V to 5.5V - powers directly from monitored battery; valid down to 1.0V for guaranteed LBO logic state |
| Quiescent Current | 1µA (typ) - enables multi-year operation in coin-cell-powered systems |
| Low-Battery Timeout | 140ms (min) - prevents premature re-enabling of system after transient voltage recovery |
| Threshold Accuracy | ±2.5% - factory-trimmed high/low thresholds ensure consistent battery-state detection across temperature |
| Output Type | Active-low open-drain (LBOH & LBOL) - allows flexible pull-up to any voltage ≤5.5V, independent of BATT |
| Operating Temperature | -40°C to +85°C - fully specified for industrial and portable consumer environments |
| Package | 4-pin SOT143 - 1.3mm × 1.3mm footprint, suitable for space-constrained handheld designs |
Pinout & Package
MAX6432FJUS-T is housed in a 4-pin SOT143 package (1.3mm × 1.3mm, 0.95mm height), lead-free, RoHS-compliant, and optimized for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | BATT | Battery voltage input and primary power supply; monitors voltage and powers internal circuitry |
| 2 | LBOH | Active-low open-drain output indicating "battery weak"; asserted when BATT falls below VHTH− |
| 3 | GND | Analog/digital ground reference for all internal comparators and logic |
| 4 | LBOL | Active-low open-drain output indicating "battery empty"; asserted when BATT falls below VLTH− |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed thresholds | Independent VHTH−/VHTH+ and VLTH−/VLTH+ pairs enable three-state battery status (good/weak/empty) without calibration |
| No external components required | Eliminates resistor dividers, references, and capacitors-reducing BOM count and PCB area |
| 140ms minimum LBO timeout | Ensures system only resumes operation after battery voltage stabilizes post-load removal or recovery |
| Guaranteed LBO logic to 1.0V | Valid output states maintained even during deep discharge, enabling safe shutdown sequencing |
| Immunity to short voltage transients | Rejects <100µs spikes on BATT rail-prevents false low-battery assertions during switching noise |
Applications
| Portable Medical Devices | Cordless Phones |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring reliable low-power shutdown before critical function loss. IC Role / Device Role / Timing Role: Dual-threshold monitor asserting LBOH at 2.8V (enter low-power mode) and LBOL at 1.8V (initiate controlled shutdown). Use Value: Prevents data corruption and unsafe operation by enforcing staged power management aligned with clinical safety margins. |
Use Scenario: Rechargeable cordless handsets using single Li+ cells where battery life estimation impacts user experience. IC Role / Device Role / Timing Role: Provides distinct "low battery" warning (LBOH) and "replace battery" signal (LBOL) to UI controller via open-drain outputs. Use Value: Enables accurate battery-status LED feedback and voice alerts without microcontroller ADC overhead or firmware calibration. |
| Electronic Toys | PDAs |
Use Scenario: Low-cost interactive toys powered by AA/AAA alkaline batteries needing predictable end-of-life behavior. IC Role / Device Role / Timing Role: Monitors two-cell (3.0V) alkaline supply; asserts LBOL at 2.0V to disable motor drivers and preserve audio playback until final shutdown. Use Value: Eliminates erratic resets and partial functionality by ensuring clean, deterministic power-off at defined voltage thresholds. |
Use Scenario: Legacy PDAs with removable NiMH battery packs requiring graceful suspend-to-disk before power loss. IC Role / Device Role / Timing Role: Triggers suspend sequence via LBOH (2.7V) and forces full shutdown via LBOL (1.9V), synchronized with real-time clock backup. Use Value: Preserves user data integrity and avoids filesystem corruption during battery depletion events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-level battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6431FJUS-T | Same SOT143-4 package and dual open-drain outputs, but features active-low push-pull LBOH instead of open-drain | Requires BATT-referenced pull-up for LBOH; less flexible for mixed-voltage system interfacing | Select when push-pull drive strength is needed for direct MCU input without external pull-up |
| TLV809E33DBZR | Single-threshold, 3.3V reset IC with 140ms delay; no dual output or hysteresis adjustment | Only provides binary "battery low" signal; cannot distinguish weak vs. empty states | Choose only for cost-sensitive, single-indicator applications where staged battery response is unnecessary |
Compared with MAX6432FJUS-T, MAX6431FJUS-T offers stronger drive but reduced interface flexibility, while TLV809E33DBZR lacks dual-threshold capability entirely-making MAX6432FJUS-T uniquely suited for three-state battery management in compact portable systems.
Availability
MAX6432FJUS-T is available at Aetrix Electronics and suitable for portable medical devices, cordless phones, and electronic toys requiring stable component supply with long-term lifecycle support and tape-and-reel delivery.
Supply support for MAX6432FJUS-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 MAX6427–MAX6438 family was designed specifically for ultra-low-power, precision battery-state monitoring in space-constrained portable electronics-emphasizing zero-calibration operation, wide supply range, and robust noise immunity.
FAQ
What is the function of the two outputs on the MAX6432FJUS-T?
The MAX6432FJUS-T provides two independent active-low open-drain outputs: LBOH signals "battery weak" (e.g., 2.8V threshold), triggering low-power mode; LBOL signals "battery empty" (e.g., 1.8V threshold), initiating system shutdown. Both include 140ms timeout to prevent chatter during voltage recovery.
Does the MAX6432FJUS-T require external resistors to set thresholds?
No. The MAX6432FJUS-T features factory-trimmed thresholds-no external resistors, references, or capacitors are needed. Threshold combinations (e.g., 2.8V/1.8V) are selected at order time via part number suffix (e.g., "FJ" = 2.8V upper, "US" = 1.8V lower), enabling drop-in deployment.
Can the MAX6432FJUS-T operate with a 1.5V alkaline battery?
Yes. While optimized for single Li+ (2.7–4.2V) or two/three-cell alkaline/NiMH (2.4–4.5V), the MAX6432FJUS-T guarantees valid LBO logic states down to BATT = 1.0V-supporting full discharge monitoring of 1.5V alkaline cells with appropriate threshold selection (e.g., 1.6V/2.3V variants).
What is the maximum pull-up voltage allowed on the LBOH and LBOL pins of the MAX6432FJUS-T?
The MAX6432FJUS-T open-drain outputs support pull-up voltages up to 5.5V-enabling direct interface to 3.3V or 5V microcontrollers even when operating from a 1.8V or 2.8V battery rail. This eliminates level-shifting requirements in mixed-voltage systems.
How does the 140ms timeout period improve system reliability in the MAX6432FJUS-T?
The 140ms minimum timeout in the MAX6432FJUS-T ensures the LBO outputs remain asserted until the battery voltage remains stably above the deassertion threshold for that duration-preventing false reactivation caused by transient recovery spikes after load removal or switching noise.
MAX6432FJUS-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 2
- Fault Protection:
- -
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-4
MAX6432FJUS-T FAQ
1.How can I place an order for MAX6432FJUS-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6432FJUS-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 MAX6432FJUS-T reliable?
The price and inventory of MAX6432FJUS-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6432FJUS-T is usually 5 days.
3.What payment methods are accepted for MAX6432FJUS-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6432FJUS-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6432FJUS-T?
MAX6432FJUS-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6432FJUS-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 MAX6432FJUS-T?
For technical support, including MAX6432FJUS-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6432FJUS-T requirements.
6.How does Aetrix verify that MAX6432FJUS-T is sourced from the original manufacturer or authorized distributors?
All MAX6432FJUS-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 MAX6432FJUS-T meets industry standards.
7.What is the process for return or replacement of MAX6432FJUS-T?
All MAX6432FJUS-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6432FJUS-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 MAX6432FJUS-T part is unused and in its original packaging.
Return procedure for MAX6432FJUS-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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