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Analog Devices Inc./Maxim Integrated MAX6441KAEHRD3-T
- Part No.:
- MAX6441KAEHRD3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- SOT-23-8
- Datasheet:
-
MAX6441KAEHRD3-T.pdf
- Description:
- IC BATT MON MULT-CHEM 2C SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6441KAEHRD3-T from Maxim Integrated is a dual-output ultra-low-power battery monitor with integrated microprocessor supervisor, designed for single-cell Li+ or multi-cell alkaline/NiMH/NiCd systems. It features factory-trimmed high/low battery thresholds (HTH-/HTH+, LTH-/LTH+), 150ms minimum LBO timeout, open-drain RESET output, and operates from 1.2V to 5.5V on both VBATT and VCC rails. It enables intelligent power management in portable medical devices and MP3 players.
For engineers reviewing the MAX6441KAEHRD3-T datasheet, MAX6441KAEHRD3-T pinout, MAX6441KAEHRD3-T application, or MAX6441KAEHRD3-T equivalent, key selection criteria include dual low-battery signaling (LBOH/LBOL/LBOLH), hysteresis-enabled stable threshold detection, manual reset with debounce, and SOT23-8 packaging compatible with space-constrained battery-powered designs.
Technical Context
The MAX6441KAEHRD3-T implements two independent voltage comparators with internal 1.23V reference to monitor VBATT against four factory-set thresholds: HTH− (2.300V typ), HTH+ (2.415V typ), LTH− (1.600V typ), and LTH+ (1.680V typ). Its logic circuitry generates three open-drain outputs-LBOH, LBOL, and LBOLH-with 150ms minimum deassertion timeout to prevent chatter during voltage transients.
It integrates an independent µP supervisor monitoring VCC at 2.625V nominal reset threshold (suffix 'R'), with 150ms minimum reset timeout (suffix 'D3'), active-low open-drain RESET output, and debounced MR input with 150ms rising-edge debounce period. Power supply is dual-rail: VBATT powers battery monitoring; VCC powers reset supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBATT Thresholds | LTH− = 1.600V, LTH+ = 1.680V, HTH− = 2.300V, HTH+ = 2.415V - enables three-state battery status reporting (OK/LOW/DEAD) with hysteresis |
| VCC Reset Threshold | 2.625V (min 2.55V, max 2.70V) - matches common 2.6V–2.7V system supply rails for reliable brownout detection |
| Supply Current | 2.5µA typical at 3.6V VBATT / 3.3V VCC - extends battery life in always-on monitoring applications |
| LBO Timeout Period | 150ms minimum - ensures stable voltage recovery before deasserting low-battery signals |
| Operating Temp Range | −40°C to +85°C - supports industrial and consumer portable equipment deployment |
| Package | SOT23-8 - surface-mount footprint with 1.95mm × 2.80mm body, compatible with automated PCB assembly |
| MR Debounce | 150ms rising-edge debounce - eliminates false resets from mechanical switch bounce |
Pinout & Package
MAX6441KAEHRD3-T is housed in an 8-pin SOT23 package (JEDEC MO-178 compliant), measuring 1.95mm × 2.80mm × 1.45mm, with gull-wing leads and coplanarity ≤ 0.1mm. Pin 1 identified by dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VBATT) | Battery voltage input & power rail | Primary supply for battery monitoring circuitry; powers device when > VCC; accepts 1.2V–5.5V |
| 2 (MR) | Manual reset input | Active-low, internally pulled up to VCC (1.5kΩ); initiates one-shot RESET pulse on valid low assertion |
| 3 (GND) | Analog/digital ground reference | Common return path for all internal circuits; must be low-impedance connection to system ground plane |
| 4 (LBOLH) | Dual-threshold low-battery output | Open-drain, active-low; asserts when VBATT < LTH− (1.600V), deasserts after ≥150ms above HTH+ (2.415V) |
| 5 (RESET) | Microprocessor reset output | Open-drain, active-low; asserts when VCC < 2.55V, remains low for ≥150ms after VCC > 2.70V |
| 6 (VCC) | System supply voltage input | Power source for reset supervision block; also monitored for brownout; accepts 1.2V–5.5V |
| 7 (LBOL) | Low-threshold battery output | Open-drain, active-low; asserts when VBATT < LTH− (1.600V), deasserts after ≥150ms above LTH+ (1.680V) |
| 8 (LBOH) | High-threshold battery output | Open-drain, active-low; asserts when VBATT < HTH− (2.300V), deasserts after ≥150ms above HTH+ (2.415V) |
Key Features
| Feature | Design Value |
|---|---|
| Dual-level battery monitoring | Three independent open-drain outputs (LBOH, LBOL, LBOLH) enable discrete system responses to OK/LOW/DEAD battery states |
| Factory-trimmed hysteresis | Fixed LTH/HTH thresholds with built-in voltage separation eliminate need for external resistors or calibration |
| Ultra-low quiescent current | 2.5µA typical total supply current allows continuous monitoring without significant battery drain |
| Integrated manual reset | MR pin includes 1.5kΩ internal pullup and 150ms hardware debounce-no external RC network required |
| Independent VCC supervision | Dedicated reset circuit monitors VCC at 2.625V with 150ms timeout, decoupled from battery monitoring function |
Applications
| Portable Medical Devices | MP3 Players |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by single Li+ cell with real-time battery health reporting. IC Role / Device Role / Timing Role: MAX6441KAEHRD3-T monitors VBATT and issues LBOH (warning) at 2.30V and LBOL (shutdown) at 1.60V to trigger data save and safe power-down. Use Value: Prevents data loss and ensures clinical reliability by enforcing staged power reduction before critical voltage collapse. |
Use Scenario: Flash-based audio player using alkaline AA batteries with dynamic power scaling based on remaining charge. IC Role / Device Role / Timing Role: MAX6441KAEHRD3-T drives LBOLH to disable display backlight at 1.60V and LBOH to reduce CPU clock at 2.30V. Use Value: Extends usable playback time by 18% through adaptive subsystem throttling aligned to precise battery thresholds. |
| Electronic Toys | Cell Phones |
|
Use Scenario: Interactive learning toy with voice feedback, powered by two NiMH cells, requiring graceful feature disablement as battery depletes. IC Role / Device Role / Timing Role: MAX6441KAEHRD3-T asserts LBOL to mute audio and LBOH to dim LEDs while maintaining core MCU operation until 1.60V. Use Value: Maintains child engagement longer by preserving essential functions while disabling non-critical peripherals. |
Use Scenario: Feature phone with removable Li+ battery, where accurate end-of-life detection prevents unexpected shutdown during calls. IC Role / Device Role / Timing Role: MAX6441KAEHRD3-T uses LBOLH to initiate emergency save mode at 1.60V and triggers full reset via RESET at VCC brownout. Use Value: Guarantees call continuity until final 5% of battery capacity, improving user experience and perceived reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitoring and µP supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6442KAEHRD3-T | Push-pull RESET output (vs. open-drain); identical thresholds, timing, and pinout | Requires no external pullup on RESET; better drive strength for heavy capacitive loads | Select when driving long traces or multiple inputs without external pullup; same PCB layout |
| TPS3808G125DBVR | Single VDD supervisor only (no battery monitoring); 1.25V reset threshold; 200ms timeout | No VBATT monitoring capability; cannot replace dual-threshold battery signaling function | Use only for VCC supervision-only designs; requires separate battery monitor IC for full functionality |
Compared with MAX6441KAEHRD3-T, MAX6442KAEHRD3-T offers stronger RESET drive but identical battery monitoring behavior, while TPS3808G125DBVR provides basic VCC supervision only-making it unsuitable as a functional replacement without adding a second IC for battery state tracking.
Availability
MAX6441KAEHRD3-T is available at Aetrix Electronics and suitable for portable medical devices, MP3 players, electronic toys, and cell phones requiring stable component supply across extended production lifecycles.
Supply support for MAX6441KAEHRD3-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, mixed-signal, and power management ICs for demanding industrial, medical, and consumer applications.
The MAX6439–MAX6442 family was engineered specifically for ultra-low-power battery state awareness and robust µP supervision in compact, battery-operated systems-prioritizing sub-3µA current draw and factory-trimmed accuracy over programmability.
FAQ
What battery chemistries does the MAX6441KAEHRD3-T support?
The MAX6441KAEHRD3-T supports single-cell lithium-ion (Li+) and multicell alkaline/NiCd/NiMH batteries. Its factory-trimmed thresholds-LTH− = 1.600V and HTH− = 2.300V-are optimized for discharge profiles of these chemistries, enabling accurate low-battery detection without external components. The device operates across the full 1.2V–5.5V VBATT range, covering nominal voltages from 1.2V (NiMH) to 4.2V (charged Li+).
How does the MAX6441KAEHRD3-T implement hysteresis?
The MAX6441KAEHRD3-T implements fixed hysteresis via four distinct factory-trimmed thresholds: LTH− (1.600V), LTH+ (1.680V), HTH− (2.300V), and HTH+ (2.415V). This creates two independent hysteresis bands-80mV for low-threshold detection and 115mV for high-threshold detection-preventing output chattering during voltage fluctuations near trip points. No external components are needed to configure or adjust hysteresis.
What is the function of the LBOLH output on the MAX6441KAEHRD3-T?
The LBOLH output on the MAX6441KAEHRD3-T is an active-low, open-drain signal that asserts when VBATT falls below LTH− (1.600V) and deasserts only after VBATT rises above HTH+ (2.415V) for ≥150ms. This cross-band behavior enables a single output to indicate both deep discharge (assert) and full recharge recovery (deassert), simplifying system logic for applications requiring clean power-up sequencing after battery replacement or charging.
Can the MAX6441KAEHRD3-T supervise both VBATT and VCC simultaneously?
Yes-the MAX6441KAEHRD3-T supervises VBATT and VCC independently. It monitors VBATT for battery state using dual-threshold comparators (LBOH/LBOL/LBOLH), while separately monitoring VCC for microprocessor reset using a dedicated comparator with 2.625V threshold and 150ms timeout. Both rails operate within 1.2V–5.5V, and the device draws power from whichever rail is higher, ensuring continuous supervision even during battery swap or adapter transition.
What is the purpose of the MR pin on the MAX6441KAEHRD3-T?
The MR (Manual Reset) pin on the MAX6441KAEHRD3-T provides edge-triggered, debounced reset initiation: pulling MR low for ≥1µs asserts RESET for exactly 150ms (D3 timeout), regardless of VCC level. An internal 1.5kΩ pullup to VCC eliminates external components, and 150ms rising-edge debounce prevents false triggers from switch bounce-enabling direct push-button integration without additional filtering circuitry.
MAX6441KAEHRD3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- 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-23-8
MAX6441KAEHRD3-T FAQ
1.How can I place an order for MAX6441KAEHRD3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6441KAEHRD3-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 MAX6441KAEHRD3-T reliable?
The price and inventory of MAX6441KAEHRD3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6441KAEHRD3-T is usually 5 days.
3.What payment methods are accepted for MAX6441KAEHRD3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6441KAEHRD3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6441KAEHRD3-T?
MAX6441KAEHRD3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6441KAEHRD3-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 MAX6441KAEHRD3-T?
For technical support, including MAX6441KAEHRD3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6441KAEHRD3-T requirements.
6.How does Aetrix verify that MAX6441KAEHRD3-T is sourced from the original manufacturer or authorized distributors?
All MAX6441KAEHRD3-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 MAX6441KAEHRD3-T meets industry standards.
7.What is the process for return or replacement of MAX6441KAEHRD3-T?
All MAX6441KAEHRD3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6441KAEHRD3-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 MAX6441KAEHRD3-T part is unused and in its original packaging.
Return procedure for MAX6441KAEHRD3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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