My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6429LTUR+T
- Part No.:
- MAX6429LTUR+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6429LTUR+T.pdf
- Description:
- IC BATT MON MULT-CHEM 1C SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,001
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6429LTUR+T from Maxim Integrated is a factory-trimmed, single-output, low-power battery monitor IC for Li+ and multi-cell alkaline/NiMH/NiCd systems. It features a fixed low-threshold of 2.7V (±2.5%), high-threshold of 3.4V (±2.5%), 140ms LBO timeout, 1µA typical supply current, and operates from 1.0V to 5.5V - enabling reliable low-battery detection in portable medical devices and pagers.
For engineers reviewing the MAX6429LTUR+T datasheet, MAX6429LTUR+T pinout, MAX6429LTUR+T application, or MAX6429LTUR+T equivalent, this device delivers precise dual-threshold hysteresis monitoring with guaranteed LBO logic validity down to BATT = 1.0V, push-pull LBO output referenced to battery voltage, and SOT23-3 packaging for space-constrained battery-powered designs.
Technical Context
The MAX6429LTUR+T implements a comparator-based battery monitoring architecture with internal 615mV reference and precision trimming. Its fixed thresholds (VLTH = 2.7V, VHTH = 3.4V) are laser-trimmed at wafer test, eliminating external components and ensuring ±2.5% accuracy over –40°C to +85°C.
It uses a dedicated timeout circuit that enforces a minimum 140ms delay before deasserting LBO after BATT rises above VHTH, preventing false recovery signals during transient voltage recovery. The push-pull LBO output drives directly from BATT and remains valid down to 1.0V, supporting brown-out detection in deeply discharged states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 1.0V to 5.5V - supports operation down to near-dead battery (1.0V), enabling full discharge utilization in single-cell Li+ and alkaline systems. |
| Low Threshold (VLTH) | 2.7V ±2.5% - factory-trimmed trip point where LBO asserts on falling BATT, optimized for 3-cell alkaline/NiMH end-of-life detection. |
| High Threshold (VHTH) | 3.4V ±2.5% - factory-trimmed trip point where LBO deasserts on rising BATT after 140ms timeout, ensuring stable power-up. |
| Supply Current | 1µA typical - ultra-low quiescent current minimizes battery drain in always-on monitoring applications like PDAs and electronic toys. |
| LBO Timeout Period | 140–280ms - guarantees minimum stabilization time before system wake-up, preventing chattering during battery recovery after load removal. |
| Output Type | Active-low push-pull - drives LBO directly from BATT without pull-up resistor; compatible with microcontroller NMI or reset inputs. |
| Operating Temperature | –40°C to +85°C - fully specified for industrial and consumer portable equipment environments. |
Pinout & Package
MAX6429LTUR+T is housed in a lead-free 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint and 1.0mm max height - suitable for high-density PCB layouts in handheld devices.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | BATT | Battery voltage input and primary power supply; monitors threshold and powers internal circuitry - valid down to 1.0V. |
| 2 | LBO | Active-low push-pull low-battery output; sinks current when asserted, sources current when deasserted - no external pull-up required. |
| 3 | GND | Analog ground reference for comparators and internal reference - must be connected to system battery return path for accurate threshold tracking. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed thresholds | 2.7V low / 3.4V high with ±2.5% tolerance - eliminates calibration effort and external resistors, reducing BOM count and layout area. |
| 140ms minimum LBO timeout | Guaranteed delay before LBO deassertion ensures system only resumes operation after battery voltage stabilizes post-load removal. |
| 1µA typical supply current | Enables >10-year battery life in low-duty-cycle monitoring (e.g., 1Hz polling), critical for maintenance-free portable medical sensors. |
| Valid LBO logic to 1.0V | Ensures deterministic reset signaling even under deep discharge, preventing undefined MCU behavior during final battery depletion. |
| Push-pull LBO output | Drives microcontroller NMI or reset pins directly without external components - simplifies interface and improves noise immunity vs. open-drain. |
Applications
| Portable Medical Devices | Electronic Toys |
|---|---|
Use Scenario: Continuous glucose monitor powered by single Li+ cell, requiring reliable low-battery warning before clinical data loss. IC Role / Device Role / Timing Role: Battery monitor providing dual-threshold hysteresis with 140ms timeout to distinguish true low-voltage condition from transient sag during sensor activation. Use Value: Prevents premature shutdown by rejecting short voltage dips, while guaranteeing alert at 2.7V to allow safe data save and user notification. |
Use Scenario: Remote-controlled toy car using two alkaline cells, needing audible low-battery alert before motor stall. IC Role / Device Role / Timing Role: Single-output voltage supervisor asserting LBO at 2.7V to trigger LED blink and buzzer, with hysteresis preventing flicker during intermittent load. Use Value: Eliminates need for manual battery testing; 1µA quiescent current extends shelf life and reduces replacement frequency. |
| Pagers | MP3 Players |
Use Scenario: Two-way pager with vibrating alert and LCD display, requiring graceful power-down when battery reaches end-of-life. IC Role / Device Role / Timing Role: Low-power battery monitor interfacing directly to baseband processor's reset line via push-pull LBO, asserting at 2.7V to initiate controlled shutdown sequence. Use Value: Ensures message integrity by triggering save-and-shutdown before voltage collapse, avoiding corrupted memory writes. |
Use Scenario: Flash-based MP3 player using single Li+ cell, needing early low-battery indication to pause playback and prompt charging. IC Role / Device Role / Timing Role: Hysteresis-based supervisor generating clean LBO signal at 2.7V, with 140ms hold-off to ignore voltage bounce during headphone insertion or button press. Use Value: Delivers consistent user experience - no false alerts during dynamic loads, and no missed warnings during sustained low-voltage operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6428LTUR+T | Fixed thresholds: VLTH = 2.6V, VHTH = 3.3V - 100mV lower than MAX6429LTUR+T across both thresholds. | Better suited for 2-cell alkaline/NiMH systems where 2.6V reflects earlier end-of-life; less margin for Li+ cell voltage sag. | Select MAX6428LTUR+T if system requires earlier warning at 2.6V, or if legacy design used MAX6428 and thresholds must match. |
| TLV7031YBHR | Single comparator with 1.24V reference; requires external resistor divider for threshold setting - no factory trim, no built-in timeout. | Demands additional passives and firmware-level timing management; lacks guaranteed 140ms debounce and 1.0V operation. | Choose TLV7031YBHR only when custom thresholds outside 2.6–3.6V range are needed and board space allows extra components. |
Compared with MAX6428LTUR+T and TLV7031YBHR, MAX6429LTUR+T provides tighter threshold accuracy, integrated timeout, and lower system-level BOM cost - making it optimal for production-ready portable devices requiring drop-in reliability without design iteration.
Availability
MAX6429LTUR+T is available at Aetrix Electronics and suitable for portable medical devices, pagers, and electronic toys requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX6429LTUR+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 battery state monitoring in space- and energy-constrained portable electronics, with emphasis on factory-trimmed accuracy and minimal external component count.
FAQ
What is the exact low-battery threshold voltage of MAX6429LTUR+T?
The MAX6429LTUR+T has a factory-trimmed low-threshold voltage (VLTH) of 2.7V with ±2.5% tolerance over –40°C to +85°C. This value is laser-trimmed during production and does not require external calibration. The corresponding high-threshold (VHTH) is 3.4V, also ±2.5%, and the hysteresis window is fixed at 700mV. These values are confirmed in the Electrical Characteristics table of the MAX6429LTUR+T datasheet.
Does MAX6429LTUR+T support operation below 1.6V?
Yes, MAX6429LTUR+T supports operation down to 1.0V on the BATT pin, and its LBO output maintains valid logic states (asserted/deasserted) across this full range. This capability is explicitly guaranteed in the Absolute Maximum Ratings and Electrical Characteristics sections, enabling use in deeply discharged single-cell alkaline or NiMH systems where voltage drops below 1.6V.
What is the function of the LBO pin on MAX6429LTUR+T?
The LBO pin on MAX6429LTUR+T is an active-low push-pull output that asserts (drives low) when BATT falls below 2.7V and remains asserted for ≥140ms after BATT rises above 3.4V. It requires no external pull-up resistor, interfaces directly with microcontroller reset or NMI inputs, and is referenced to the BATT supply - ensuring compatibility with battery-voltage logic domains.
Is MAX6429LTUR+T pin-compatible with other MAX6427–MAX6429 variants?
Yes, all MAX6427/MAX6428/MAX6429 variants share identical SOT23-3 pinout (BATT–LBO–GND) and electrical interface. The only differences are factory-trimmed threshold voltages - e.g., MAX6429LTUR+T uses 2.7V/3.4V, while MAX6427LTUR+T uses 2.6V/3.3V. No PCB changes are required when substituting within this group, provided the new thresholds meet system requirements.
What is the maximum recommended operating temperature for MAX6429LTUR+T?
The MAX6429LTUR+T is fully specified for continuous operation from –40°C to +85°C ambient temperature. Its electrical parameters - including threshold accuracy, supply current, and timeout period - are guaranteed across this range per the datasheet's Operating Temperature Range specification. Junction temperature must not exceed +150°C under any condition.
MAX6429LTUR+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-23-3
MAX6429LTUR+T FAQ
1.How can I place an order for MAX6429LTUR+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6429LTUR+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 MAX6429LTUR+T reliable?
The price and inventory of MAX6429LTUR+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6429LTUR+T is usually 5 days.
3.What payment methods are accepted for MAX6429LTUR+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6429LTUR+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6429LTUR+T?
MAX6429LTUR+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6429LTUR+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 MAX6429LTUR+T?
For technical support, including MAX6429LTUR+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6429LTUR+T requirements.
6.How does Aetrix verify that MAX6429LTUR+T is sourced from the original manufacturer or authorized distributors?
All MAX6429LTUR+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 MAX6429LTUR+T meets industry standards.
7.What is the process for return or replacement of MAX6429LTUR+T?
All MAX6429LTUR+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6429LTUR+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 MAX6429LTUR+T part is unused and in its original packaging.
Return procedure for MAX6429LTUR+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6429LTUR+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…
