My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6440UTFJTD7-T
- Part No.:
- MAX6440UTFJTD7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- SOT-23-6
- Datasheet:
-
MAX6440UTFJTD7-T.pdf
- Description:
- IC BATT MON MULT-CHEM 1C SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6440UTFJTD7-T from Maxim Integrated is a single-output, ultra-low-power battery monitor with integrated microprocessor supervisor and push-pull active-low RESET output. It monitors VBATT (1.2V–5.5V) and VCC (1.2V–5.5V), provides factory-trimmed 3.10V ±0.075V low-battery threshold (LTH = 3.10V, HTH = 3.178V), 150ms LBO timeout, and 1200ms VCC reset timeout - used in Li+ battery-powered portable medical devices to enable graceful low-power mode transition before shutdown.
For engineers reviewing the MAX6440UTFJTD7-T datasheet, MAX6440UTFJTD7-T pinout, MAX6440UTFJTD7-T application, or MAX6440UTFJTD7-T equivalent, key selection criteria include its push-pull RESET drive capability (VOH ≥ 0.8×VCC at 500µA), 2.5µA typical supply current, dual-supply operation (VBATT/VCC power arbitration), -40°C to +85°C industrial temperature range, and SOT23-6 package compatibility with space-constrained handheld designs.
Technical Context
The MAX6440UTFJTD7-T integrates a precision 1.23V reference, two comparators, hysteresis timing logic, and independent VCC supervision circuitry. Its single open-drain LBO output asserts when VBATT falls below 3.10V and deasserts only after VBATT rises above 3.178V for ≥150ms, eliminating chatter during voltage transients.
VCC supervision uses a factory-set 3.075V reset threshold (±0.075V) with 1200ms minimum timeout (D7 suffix), and RESET is push-pull - enabling direct interface to µP reset inputs without external pull-up. MR input includes internal 1.5kΩ pullup and 150ms debounce to suppress switch bounce.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBATT Threshold (LTH/HTH) | 3.10V / 3.178V - precise hysteresis window for single-cell Li+ monitoring; prevents false low-battery alerts during load-induced dips |
| VCC Reset Threshold | 3.075V ±0.075V - fixed factory-trimmed level ensures reliable µP reset initiation across temperature (-40°C to +85°C) |
| VCC Reset Timeout | 1200ms min - guarantees stable power-up sequence for slow-ramping DC/DC converters or brownout recovery |
| Supply Current | 2.5µA typ at 3.6V - enables multi-year battery life in always-on portable devices (e.g., glucose meters) |
| LBO Timeout | 150ms min - enforces voltage stabilization before system resumes full operation, avoiding premature wake-up |
| RESET Output Type | Push-pull - eliminates need for external pull-up resistor; drives µP reset pin directly with VOH ≥ 0.8×VCC at 500µA |
| Operating Temp Range | -40°C to +85°C - qualified for industrial and medical-grade portable equipment environments |
Pinout & Package
MAX6440UTFJTD7-T is housed in a 6-pin SOT23-6 package (JEDEC MO-178 compliant, 2.8mm × 2.9mm footprint, 1.45mm height), optimized for high-density PCB layouts in battery-powered wearables and handheld diagnostics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VBATT | Battery voltage input & auxiliary power rail | Primary supply for battery monitoring circuitry; powers device if VBATT > VCC; supports 1.2V–5.5V range |
| 2 - MR | Manual reset input (active-low) | Internal 1.5kΩ pullup to VCC; debounced 150ms rising-edge filter; accepts push-button or CMOS logic |
| 3 - LBO | Low-battery output (active-low, open-drain) | Asserts when VBATT < 3.10V; deasserts after VBATT > 3.178V for ≥150ms; compatible with 5.5V logic systems |
| 4 - RESET | Microprocessor reset output (active-low, push-pull) | Drives µP reset pin directly; VOH ≥ 0.8×VCC at 500µA; VOL ≤ 0.3V at 1.2mA; guaranteed valid for VCC > 1.0V |
| 5 - GND | Analog/digital ground reference | Common return path for VBATT, VCC, LBO, and RESET; must be low-impedance connection to system ground plane |
| 6 - VCC | System supply voltage input & reset monitor source | Input for VCC supervisor; powers device if VCC > VBATT; monitored for 3.075V reset threshold with 1200ms timeout |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed dual-threshold battery monitor | 3.10V LTH / 3.178V HTH hysteresis eliminates chattering during Li+ battery voltage sag under pulsed loads |
| Push-pull RESET output | Direct µP reset drive without external pull-up; reduces BOM count and layout area in compact portable designs |
| Ultra-low quiescent current | 2.5µA typical total supply current (ICC + IBATT) extends battery service life in always-on medical sensors |
| Dual-supply arbitration | Automatically selects higher of VBATT or VCC as internal power source - ensures operation during battery swap or charger insertion |
| Immunity to short VBATT transients | Withstands ≤100µs transients up to 20mV overdrive (per toc04), preventing spurious LBO assertion in noisy environments |
Applications
| Portable Medical Monitoring | Li+ Battery-Powered Handhelds |
|---|---|
|
Use Scenario: Continuous glucose monitor operating from single-cell Li+ battery with USB charging. IC Role / Device Role / Timing Role: Monitors battery health to trigger low-power sensor sampling at 3.10V and disable non-critical radios at 3.178V; RESET ensures clean µP restart after brownout. Use Value: Prevents data loss during battery depletion by initiating graceful shutdown 78mV before critical cutoff, extending usable runtime by ~12%. |
Use Scenario: Bluetooth-enabled pulse oximeter with manual reset button and DC/DC converter. IC Role / Device Role / Timing Role: LBO signals µP to reduce LED brightness; RESET asserts on VCC dip during wireless transmission; MR enables field technician reset. Use Value: Push-pull RESET eliminates external pull-up, saving 0.5mm² PCB area; 1200ms timeout accommodates slow DC/DC soft-start sequences. |
| Industrial Wireless Sensors | Consumer Audio Devices |
|
Use Scenario: LoRaWAN soil moisture sensor deployed in remote locations with AA alkaline cells. IC Role / Device Role / Timing Role: Detects end-of-life battery via LBO; triggers sleep mode at 3.10V and disables RF transceiver at 3.178V; RESET manages µP wake-up integrity. Use Value: 2.5µA supply current enables >5-year shelf life; hysteresis prevents false wake-ups during RF transmit current spikes. |
Use Scenario: True wireless stereo earbuds with embedded Li+ battery and touch control MCU. IC Role / Device Role / Timing Role: LBO initiates battery-level UI feedback; RESET guarantees deterministic boot after charging insertion; MR supports factory test mode. Use Value: SOT23-6 footprint fits inside 12mm earbud housing; 150ms LBO timeout avoids flicker during brief voltage sags during touch sensing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor and µP supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6439UTFJTD7-T | Open-drain RESET output (vs. push-pull); identical VBATT/VCC thresholds, timeouts, and supply current | Requires external pull-up resistor on RESET line; suitable where µP reset pin tolerates open-drain configuration | Select MAX6439UTFJTD7-T only if existing design already includes RESET pull-up; otherwise MAX6440UTFJTD7-T reduces component count. |
| TPS3808G33DBVR | Single VDD supervisor (no VBATT monitor); 3.3V reset threshold; 200ms/600ms timeout options; 1.1µA IQ | Cannot monitor battery voltage independently; requires separate battery gauge IC for low-battery signaling | Choose TPS3808G33DBVR only for VCC-only supervision in cost-sensitive, non-battery-aware systems; not a functional substitute for MAX6440UTFJTD7-T. |
Compared with MAX6439UTFJTD7-T, MAX6440UTFJTD7-T eliminates the RESET pull-up requirement, reducing BOM and layout complexity; versus TPS3808G33DBVR, it delivers integrated battery state awareness essential for portable equipment runtime management.
Availability
MAX6440UTFJTD7-T is available at Aetrix Electronics and suitable for portable medical devices, Li+ battery-powered handhelds, and industrial wireless sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6440UTFJTD7-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 communications applications.
The MAX6439–MAX6442 family was engineered specifically for ultra-low-power battery state monitoring and µP supervision in space- and energy-constrained portable electronics - delivering factory-trimmed accuracy without external components.
FAQ
What is the exact low-battery threshold voltage for MAX6440UTFJTD7-T?
The MAX6440UTFJTD7-T has a factory-trimmed lower battery threshold (LTH) of 3.10V (typical) with ±0.075V tolerance, and an upper hysteresis threshold (HTH) of 3.178V (typical). These values are set by the "F" suffix in the part number and are fully specified over -40°C to +85°C. The 78mV hysteresis prevents output oscillation during battery voltage fluctuations.
Does MAX6440UTFJTD7-T require external components for basic operation?
No, MAX6440UTFJTD7-T operates autonomously with no external components required. Its factory-trimmed thresholds, internal 1.23V reference, and integrated timing logic eliminate the need for resistors, capacitors, or trimming circuits - simplifying design and improving reliability in portable medical and consumer devices.
How does the push-pull RESET output of MAX6440UTFJTD7-T differ from open-drain alternatives?
The MAX6440UTFJTD7-T features a push-pull RESET output capable of sourcing up to 500µA while maintaining VOH ≥ 0.8×VCC, unlike open-drain variants that require an external pull-up. This allows direct connection to most µP reset pins, reducing component count, PCB area, and potential noise coupling from pull-up networks.
What is the function of the MR pin on MAX6440UTFJTD7-T?
The MR (Manual Reset) pin on MAX6440UTFJTD7-T is an active-low input with internal 1.5kΩ pullup to VCC and 150ms rising-edge debounce. Pulling MR low generates a one-shot RESET pulse for the MR timeout period (150ms), enabling push-button or logic-controlled system reset without affecting VCC or VBATT monitoring functions.
Can MAX6440UTFJTD7-T monitor both VBATT and VCC simultaneously?
Yes, MAX6440UTFJTD7-T continuously monitors both VBATT (1.2V–5.5V) for battery health and VCC (1.2V–5.5V) for system supply integrity. It automatically selects the higher of VBATT or VCC as its internal power source, ensuring uninterrupted operation during battery replacement or charger insertion - critical for always-on portable medical devices.
MAX6440UTFJTD7-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- 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-23-6
MAX6440UTFJTD7-T FAQ
1.How can I place an order for MAX6440UTFJTD7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6440UTFJTD7-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 MAX6440UTFJTD7-T reliable?
The price and inventory of MAX6440UTFJTD7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6440UTFJTD7-T is usually 5 days.
3.What payment methods are accepted for MAX6440UTFJTD7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6440UTFJTD7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6440UTFJTD7-T?
MAX6440UTFJTD7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6440UTFJTD7-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 MAX6440UTFJTD7-T?
For technical support, including MAX6440UTFJTD7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6440UTFJTD7-T requirements.
6.How does Aetrix verify that MAX6440UTFJTD7-T is sourced from the original manufacturer or authorized distributors?
All MAX6440UTFJTD7-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 MAX6440UTFJTD7-T meets industry standards.
7.What is the process for return or replacement of MAX6440UTFJTD7-T?
All MAX6440UTFJTD7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6440UTFJTD7-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 MAX6440UTFJTD7-T part is unused and in its original packaging.
Return procedure for MAX6440UTFJTD7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6440UTFJTD7-T Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
