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Analog Devices Inc./Maxim Integrated MAX6848KARD7-T
- Part No.:
- MAX6848KARD7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- SOT-23-8
- Datasheet:
-
MAX6848KARD7-T.pdf
- Description:
- IC BATT MON MULT-CHEM 2C SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
The MAX6848KARD7-T from Maxim Integrated is a dual-output, ultra-low-power battery monitor with integrated microprocessor supervisor. It features two independent open-drain low-battery outputs (LBOL and LBOH), user-adjustable 582mV/615mV thresholds with 5% hysteresis, 1.575V factory-set VCC reset threshold, and 1200ms minimum reset timeout - designed for single-cell Li+ or multicell alkaline/NiMH systems requiring precise battery state signaling and reliable µP reset.
For engineers reviewing the MAX6848KARD7-T datasheet, MAX6848KARD7-T pinout, MAX6848KARD7-T application, or MAX6848KARD7-T equivalent, key selection criteria include dual LBO timing behavior, SOT23-8 package compatibility, VCC reset threshold tolerance (±45mV), manual reset debounce period (150–225ms), and supply current of 2.5µA at 3.6V - all critical for portable medical devices and battery-powered embedded systems.
Technical Context
The MAX6848KARD7-T implements dual comparator-based monitoring using an internal 615mV reference to detect high- and low-threshold crossings on HTHIN and LTHIN inputs. Its LBOL and LBOH outputs each feature independent 150ms minimum timeout periods and 5% typical hysteresis to prevent chatter during battery recovery transients.
It integrates a dedicated VCC supervisor with fixed 1.575V reset threshold (±45mV), 1200ms minimum timeout, and active-low open-drain RESET output. The MR input includes internal 1.5kΩ pullup, 150–225ms rising-edge debounce, and 1µs minimum pulse width support for pushbutton-initiated resets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.575V ±45mV - ensures reliable µP reset initiation when system supply drops below safe operating voltage. |
| VCC Reset Timeout | 1200ms min - guarantees sustained reset assertion long enough to fully discharge internal logic states before release. |
| LBOH/LBOL Timeout | 150ms min - prevents premature deassertion during transient voltage recovery after load removal. |
| Supply Current | 2.5µA typ at 3.6V - enables multi-year operation in coin-cell–powered applications. |
| Threshold Reference | 615mV internal reference with 5% hysteresis - supports stable dual-threshold detection across -40°C to +85°C. |
| Operating Voltage | VDD: 1.6V–5.5V; VCC: 1.2V–5.5V - allows direct connection to Li+ cells or regulated rails without external LDO. |
| MR Debounce Period | 150–225ms - eliminates false resets caused by mechanical switch bounce in manual reset circuits. |
Pinout & Package
Package: 8-pin SOT23-8, surface-mount, -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply input | Accepts 1.6V–5.5V; powers device when higher than VCC; enables direct battery monitoring without regulation. |
| GND | Analog/digital ground reference | Common return path for all internal comparators, timers, and output drivers. |
| LTHIN | Low-threshold input | Resistor-divider node setting LBOL trip points (VLTH− = 582mV, VLTH+ = 615mV). |
| LBOL | Active-low open-drain output | Asserts when LTHIN falls below 582mV; deasserts after 150ms once LTHIN rises above 615mV. |
| RESET | Active-low open-drain reset output | Asserts when VCC falls below 1.575V; remains low for ≥1200ms after VCC exceeds threshold. |
| MR | Manual reset input | Active-low with internal 1.5kΩ pullup to VCC; debounced rising edge triggers one-shot 150ms reset pulse. |
| HTHIN | High-threshold input | Resistor-divider node setting LBOH trip points (VHTH− = 582mV, VHTH+ = 615mV). |
| VCC | Voltage monitor input & secondary supply | Input for reset supervision; powers device if > VDD; supports 1.2V–5.5V range. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent low-battery outputs | LBOL and LBOH provide separate "low" and "critical" battery alerts for staged power management. |
| User-adjustable 582mV/615mV thresholds | Enables precise battery state detection across Li+, NiMH, and alkaline chemistries via external resistor dividers. |
| 5% typical hysteresis per channel | Prevents output oscillation during battery voltage sag/recovery cycles common in pulsed-load applications. |
| 1200ms VCC reset timeout | Ensures complete microprocessor initialization and memory stabilization before release. |
| 150ms LBO assertion delay | Filters short-duration voltage dips (e.g., motor startup) to avoid spurious low-battery warnings. |
| 2.5µA typical supply current | Extends battery life in always-on monitoring applications such as wearable health sensors. |
Applications
| Portable Medical Monitors | Digital Cameras |
|---|---|
Use Scenario: Continuous ECG or glucose meter operation powered by a single Li+ cell. IC Role / Device Role / Timing Role: Dual-threshold battery monitor triggering low-power mode at 3.4V (LBOH) and full shutdown at 3.0V (LBOL). Use Value: Prevents data loss during battery depletion by enabling graceful firmware save before cutoff. | Use Scenario: Flash-intensive photo capture where burst mode causes rapid voltage droop. IC Role / Device Role / Timing Role: LBOL asserts only after sustained 150ms under-voltage, ignoring flash-induced transients. Use Value: Eliminates false low-battery warnings during normal operation while preserving accurate end-of-life detection. |
| Wireless Headsets | Smart Remote Controls |
Use Scenario: Bluetooth audio streaming with variable RF transmit power drawing 5–50mA pulses. IC Role / Device Role / Timing Role: LBOH signals "battery low" at 3.5V to reduce codec sampling rate; LBOL disables Bluetooth at 3.2V. Use Value: Extends usable runtime by 18% through adaptive power scaling before shutdown. | Use Scenario: IR remote powered by two alkaline cells with gradual voltage decay over months. IC Role / Device Role / Timing Role: Uses VDD-supplied operation and resistor-programmed thresholds matching 2× alkaline discharge curve. Use Value: Delivers consistent low-battery alert timing across entire battery life, independent of load current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitoring and µP reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6848KASD7-T | Same dual-LBO function, but 2.925V VCC reset threshold instead of 1.575V. | Suitable for 3.3V systems where higher reset threshold prevents nuisance resets during brownouts. | Select when supervising 3.3V rails rather than 1.8V/2.5V logic domains. |
| TPS3808G12DBVR | Single-output supervisor with 1.2V reset threshold, no adjustable battery thresholds or dual LBO. | Provides basic reset only; lacks battery state awareness and programmable hysteresis. | Choose only if application requires only VCC reset without battery monitoring capability. |
Compared with MAX6848KARD7-T, MAX6848KASD7-T offers identical dual-LBO functionality but targets higher-voltage systems, while TPS3808G12DBVR provides simpler reset-only supervision without battery state intelligence - making MAX6848KARD7-T uniquely suited for applications demanding both precise battery staging and robust µP reset in compact Li+-powered designs.
Availability
MAX6848KARD7-T is available at Aetrix Electronics and suitable for portable medical devices, digital cameras, wireless headsets, and smart remote controls requiring stable component supply and long-term design-in support.
Supply support for MAX6848KARD7-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 in industrial, medical, and consumer markets.
The MAX6846–MAX6849 product line delivers ultra-low-power, hysteresis-equipped battery monitors with integrated µP reset - engineered specifically for space-constrained, battery-critical systems where runtime predictability and fail-safe reset behavior are essential.
FAQ
What is the exact VCC reset threshold voltage for MAX6848KARD7-T?
The MAX6848KARD7-T has a factory-trimmed VCC reset threshold of 1.575V, with a guaranteed tolerance of ±45mV (1.530V to 1.620V) over the full -40°C to +85°C temperature range. This value is fixed and cannot be adjusted externally - it is selected by the 'V' suffix in the part number and verified during production test.
How do LBOL and LBOH behave differently in MAX6848KARD7-T?
In the MAX6848KARD7-T, LBOL asserts when LTHIN falls below 582mV and deasserts only after LTHIN rises above 615mV for ≥150ms; LBOH asserts when HTHIN falls below 582mV and deasserts after HTHIN rises above 615mV for ≥150ms. Their independent inputs allow distinct high- and low-battery state detection, enabling staged system response.
Can MAX6848KARD7-T operate from a single 3.6V Li+ cell without external regulation?
Yes, the MAX6848KARD7-T supports VDD operation from 1.6V to 5.5V, making it compatible with direct connection to a single Li+ cell (2.7V–4.2V). Its 2.5µA typical supply current and internal 615mV reference enable full functionality across the entire battery discharge curve without external LDO or regulator.
What is the purpose of the MR pin on MAX6848KARD7-T, and how is it debounced?
The MR pin on MAX6848KARD7-T provides active-low manual reset initiation. It features an internal 1.5kΩ pullup to VCC and rising-edge debounce of 150–225ms to suppress switch bounce. When pulled low, it generates a one-shot RESET pulse lasting exactly the MR reset timeout period (150–225ms), independent of VCC status.
Does MAX6848KARD7-T require external resistors to set battery thresholds, and what is their role?
Yes, MAX6848KARD7-T requires external resistor dividers on LTHIN and HTHIN pins to scale battery voltage to the internal 582mV/615mV thresholds. R1–R3 form a three-resistor network that sets both trip points and hysteresis; total resistance can be up to 500kΩ due to the device's high input impedance, minimizing battery drain.
MAX6848KARD7-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
MAX6848KARD7-T FAQ
1.How can I place an order for MAX6848KARD7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6848KARD7-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 MAX6848KARD7-T reliable?
The price and inventory of MAX6848KARD7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6848KARD7-T is usually 5 days.
3.What payment methods are accepted for MAX6848KARD7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6848KARD7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6848KARD7-T?
MAX6848KARD7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6848KARD7-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 MAX6848KARD7-T?
For technical support, including MAX6848KARD7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6848KARD7-T requirements.
6.How does Aetrix verify that MAX6848KARD7-T is sourced from the original manufacturer or authorized distributors?
All MAX6848KARD7-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 MAX6848KARD7-T meets industry standards.
7.What is the process for return or replacement of MAX6848KARD7-T?
All MAX6848KARD7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6848KARD7-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 MAX6848KARD7-T part is unused and in its original packaging.
Return procedure for MAX6848KARD7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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