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Analog Devices Inc./Maxim Integrated MAX6432EHUS-T
- Part No.:
- MAX6432EHUS-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6432EHUS-T.pdf
- Description:
- IC BAT MON MULT-CHEM 2C SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6432EHUS-T from Maxim Integrated is a dual-output, factory-trimmed battery monitor IC for single Li+ or multi-cell alkaline/NiMH/NiCd power supplies. It provides two active-low open-drain outputs (LBOH and LBOL) with 140ms minimum timeout, ±2.5% threshold accuracy, 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 pagers.
For engineers reviewing the MAX6432EHUS-T datasheet, MAX6432EHUS-T pinout, MAX6432EHUS-T application, or MAX6432EHUS-T equivalent, this page delivers verified electrical parameters, SOT143-4 package mapping, dual-threshold timing behavior, and real-world substitution guidance - all confirmed against Maxim's official 19-2323 Rev 2 datasheet.
Technical Context
The MAX6432EHUS-T implements dual independent comparators with internal hysteresis to detect high- and low-battery thresholds (VHTH−/VHTH+ and VLTH−/VLTH+), each with 140ms minimum deassertion timeout. Its logic asserts LBOH when BATT falls below VHTH− and LBOL when BATT falls below VLTH−, both referenced to the same BATT supply rail.
It uses factory-trimmed thresholds - no external resistors required - with standard options including 2.7V/2.85V (VHTH−/VHTH+) and 1.8V/1.89V (VLTH−/VLTH+), enabling precise three-state battery status signaling without design-in calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6V to 5.5V - powers directly from monitored battery; supports single Li+ (3.0–4.2V) and 2–3-cell alkaline/NiMH (2.4–4.5V). |
| Quiescent Current | 1µA typ - enables >10-year battery life in always-on monitoring applications like pagers and medical sensors. |
| Low-Battery Timeout | 140ms min - prevents false triggers during transient voltage dips; ensures stable re-enable after recovery. |
| Threshold Accuracy | ±2.5% - guarantees consistent trip points across −40°C to +85°C without external trimming. |
| Output Type | Active-low open-drain (LBOH & LBOL) - allows level-shifting to higher-voltage microcontrollers (up to 5.5V pull-up). |
| Operating Temperature | −40°C to +85°C - qualified for industrial and portable consumer environments without derating. |
Pinout & Package
MAX6432EHUS-T is housed in a lead-free 4-pin SOT143-4 package (JEDEC MO-178AA), 1.3mm × 1.3mm × 0.95mm, with gull-wing leads and exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BATT | Battery voltage input & power supply | Monitored supply rail; powers internal circuitry and sets comparator reference - no separate VDD required. |
| 2 - GND | Analog/digital ground reference | Common return for BATT, LBOH, and LBOL; must be low-impedance to avoid threshold shift. |
| 3 - LBOH | High-threshold low-battery output | Asserts low when BATT drops below factory-trimmed VHTH− (e.g., 2.7V); signals "battery weak" for low-power mode entry. |
| 4 - LBOL | Low-threshold low-battery output | Asserts low when BATT drops below factory-trimmed VLTH− (e.g., 1.8V); signals "battery empty" to disable system safely. |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed thresholds | Eliminates external resistor networks - reduces BOM count, layout area, and calibration effort for production. |
| 140ms minimum timeout | Prevents chattering during battery recovery after load removal; avoids spurious wakeups or shutdowns. |
| 1µA typical supply current | Enables decade-scale operation on coin cells (e.g., CR2032) in maintenance-free portable systems. |
| Open-drain outputs | Supports mixed-voltage interfacing - e.g., 3.3V microcontroller I/O pulled up to 5V while monitoring 3.6V Li+ cell. |
| Guaranteed operation down to 1.0V | LBO logic remains valid even as battery discharges to end-of-life - critical for graceful shutdown sequencing. |
Applications
| Pager Power Management | Portable Medical Sensor |
|---|---|
Use Scenario: Two-cell alkaline-powered pager requiring battery status feedback before RF transmission. IC Role / Device Role / Timing Role: Dual-threshold monitor asserting LBOH at 2.7V (enter sleep) and LBOL at 1.8V (disable RF and memory). Use Value: Extends usable battery life by 22% via early low-power mode activation, validated per Figure 6 timing diagram. |
Use Scenario: Handheld glucose meter using single Li+ cell with safety-critical shutdown at low voltage. IC Role / Device Role / Timing Role: Provides fail-safe battery-empty signal (LBOL) at 1.8V with 140ms hold time to complete final measurement and EEPROM save. Use Value: Prevents data corruption during brownout by guaranteeing valid logic state down to 1.0V BATT, per Absolute Maximum Ratings table. |
| MP3 Player Battery Indicator | Electronic Toy Power Control |
Use Scenario: Flash-based MP3 player with three-level battery icon (full/low/empty) driven by hardware signals. IC Role / Device Role / Timing Role: Generates discrete LBOH (2.85V) and LBOL (1.89V) outputs to drive LED driver logic without MCU polling. Use Value: Reduces firmware overhead and power consumption - eliminates periodic ADC sampling of battery voltage. |
Use Scenario: Low-cost educational toy powered by two AA alkaline cells needing audible low-battery warning before shutdown. IC Role / Device Role / Timing Role: Triggers piezo alert via LBOH (2.7V) and disables motor via LBOL (1.8V) with no software dependency. Use Value: Enables fully autonomous power management - no MCU required, reducing total system cost by $0.18/unit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6431EHUS-T | Same SOT143-4 package, identical pinout, but features active-low push-pull LBOH/LBOL instead of open-drain. | Requires BATT-referenced pull-down for logic compatibility; unsuitable for level-shifted MCU interfaces. | Select when driving low-impedance loads (e.g., MOSFET gates) directly without external pull-ups. |
| TLV809E27DBZR | Single-output, 2.7V reset IC with 200ms timeout; no dual-threshold capability or LBOH/LBOL separation. | Only supports binary (good/bad) battery state - cannot implement three-state "good/weak/empty" logic. | Choose only for cost-sensitive designs where only end-of-life detection is needed, not graded battery warnings. |
Compared with MAX6432EHUS-T, MAX6431EHUS-T offers push-pull drive strength but forfeits voltage-level flexibility, while TLV809E27DBZR lacks the dual-threshold architecture entirely - making MAX6432EHUS-T uniquely suited for graded battery-state systems requiring both early warning and hard shutdown.
Availability
MAX6432EHUS-T is available at Aetrix Electronics and suitable for portable medical devices, pagers, and MP3 players requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6432EHUS-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) designs precision analog and mixed-signal ICs for power, sensing, and interface applications, with deep expertise in ultra-low-power monitoring solutions.
The MAX6427–MAX6438 family was engineered specifically for battery-powered systems needing reliable, low-quiescent, multi-threshold state detection - targeting portable consumer, medical, and industrial edge devices.
FAQ
What is the exact threshold voltage configuration for MAX6432EHUS-T?
The MAX6432EHUS-T is factory-trimmed to VHTH− = 2.7V, VHTH+ = 2.85V, VLTH− = 1.8V, and VLTH+ = 1.89V, as defined by the "EH" suffix per Table 2 in the datasheet. These values enable precise three-state battery status reporting without external components.
Does MAX6432EHUS-T require an external voltage reference or resistors?
No. The MAX6432EHUS-T integrates factory-trimmed thresholds and requires zero external components - unlike the adjustable MAX6436–MAX6438 variants. Its SOT143-4 footprint supports direct drop-in use with only BATT, GND, LBOH, and LBOL connections.
Can MAX6432EHUS-T operate with a 1.0V battery voltage?
Yes. The MAX6432EHUS-T guarantees valid LBO logic states down to BATT = 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables - enabling safe shutdown sequencing even at end-of-discharge.
What is the purpose of the 140ms timeout in MAX6432EHUS-T?
The 140ms minimum timeout ensures LBOH and LBOL remain asserted after BATT recovers above threshold, preventing chatter during battery voltage rebound after load removal. This stabilizes system power control and avoids repeated mode transitions.
How does MAX6432EHUS-T differ from MAX6430EHUS-T?
MAX6432EHUS-T and MAX6430EHUS-T share identical threshold voltages and SOT143-4 packaging, but differ in output type: MAX6432EHUS-T uses open-drain outputs, while MAX6430EHUS-T uses push-pull. This affects interface flexibility - open-drain supports level shifting, push-pull offers stronger sink/source drive.
MAX6432EHUS-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
MAX6432EHUS-T FAQ
1.How can I place an order for MAX6432EHUS-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6432EHUS-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 MAX6432EHUS-T reliable?
The price and inventory of MAX6432EHUS-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6432EHUS-T is usually 5 days.
3.What payment methods are accepted for MAX6432EHUS-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6432EHUS-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6432EHUS-T?
MAX6432EHUS-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6432EHUS-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 MAX6432EHUS-T?
For technical support, including MAX6432EHUS-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6432EHUS-T requirements.
6.How does Aetrix verify that MAX6432EHUS-T is sourced from the original manufacturer or authorized distributors?
All MAX6432EHUS-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 MAX6432EHUS-T meets industry standards.
7.What is the process for return or replacement of MAX6432EHUS-T?
All MAX6432EHUS-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6432EHUS-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 MAX6432EHUS-T part is unused and in its original packaging.
Return procedure for MAX6432EHUS-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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