My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6427EHUR-T
- Part No.:
- MAX6427EHUR-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6427EHUR-T.pdf
- Description:
- IC BATT MON MULT-CHEM 1C SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6427EHUR-T from Maxim Integrated is a single-output, factory-trimmed battery monitor IC for Li+ and multi-cell alkaline/NiMH/NiCd power supplies. It features a 2.0V low-threshold (VLTH), 2.7V high-threshold (VHTH), 140ms LBO timeout, 1µA typical supply current, and push-pull active-low LBO output - used to trigger low-power mode or system shutdown in portable medical devices and MP3 players.
For engineers reviewing the MAX6427EHUR-T datasheet, MAX6427EHUR-T pinout, MAX6427EHUR-T application, or MAX6427EHUR-T equivalent, key selection criteria include factory-set thresholds, guaranteed LBO validity down to 1.0V BATT, immunity to short voltage transients, and SOT23-3 package compatibility with space-constrained battery-powered systems.
Technical Context
The MAX6427EHUR-T implements a dual-comparator architecture with internal 615mV reference and hysteresis timing logic to detect battery voltage crossing of factory-trimmed VLTH = 2.0V (±2.5%) and VHTH = 2.7V (±2.5%). Its push-pull LBO output asserts low when BATT falls below VLTH and deasserts only after BATT rises above VHTH and sustains ≥140ms timeout.
This device operates from 1.0V to 5.5V supply (BATT), draws just 1µA at 3.7V, and guarantees valid LBO logic state down to BATT = 1.0V - enabling reliable monitoring during deep discharge. It requires no external components and is fully specified over –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Low Threshold (VLTH) | 2.0V ±2.5% - triggers LBO assertion at defined battery depletion point for single Li+ or two-cell alkaline systems. |
| High Threshold (VHTH) | 2.7V ±2.5% - sets recovery voltage for LBO deassertion, ensuring stable re-enablement after battery rebound. |
| Supply Current | 1µA typ at 3.7V - enables multi-year operation on coin cells or primary batteries without significant drain. |
| LBO Timeout Period | 140–280ms min - prevents premature reactivation during transient voltage recovery after load removal. |
| Operating Voltage Range | 1.0V to 5.5V - supports full discharge monitoring of Li+ (2.7–4.2V) and alkaline/NiMH (0.9–1.5V/cell × 2–3). |
| Output Type | Push-pull active-low LBO - drives logic directly without pull-up resistor; referenced to BATT for simplified interface. |
| Temperature Range | –40°C to +85°C - qualified for industrial and portable consumer environments including medical handhelds. |
Pinout & Package
MAX6427EHUR-T is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint and 1.45mm max height - optimized for ultra-compact PCB layouts in wearables and hearing aids.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | BATT | Battery voltage input and power supply - monitors source directly; supports operation down to 1.0V. |
| 2 | LBO | Active-low push-pull output - sinks up to 3.2mA at 4.5V; asserts when BATT < VLTH, deasserts after ≥140ms above VHTH. |
| 3 | GND | Analog/digital ground reference - must be connected to system battery return for accurate threshold tracking. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed thresholds | 2.0V/2.7V pair with ±2.5% tolerance - eliminates calibration effort and external resistors for production-ready designs. |
| 140ms minimum LBO timeout | Guaranteed delay before LBO deassertion - prevents chattering during battery voltage recovery under light/no load. |
| 1µA typical supply current | Enables >10-year shelf life on CR2032 (220mAh) - critical for infrequently used portable medical or security devices. |
| Valid LBO state to 1.0V BATT | Ensures deterministic output behavior even during deep discharge - avoids undefined logic states near end-of-life. |
| Immunity to short transients | Rejects ≤10µs spikes per comparator overdrive curve - maintains reliability in noisy switch-mode or motor-driven systems. |
Applications
| Portable Medical Devices | MP3 Players |
|---|---|
Use Scenario: Battery-powered glucose meter with LCD display and Bluetooth LE transmission. IC Role / Device Role / Timing Role: Monitors single Li+ cell to initiate sleep mode at 2.0V and disable peripherals at 2.7V recovery threshold. Use Value: Extends usable runtime by 12% vs. fixed-voltage reset ICs via precise hysteresis-controlled state transitions. |
Use Scenario: Flash-based audio player using two AA alkaline cells (2.0–3.2V range). IC Role / Device Role / Timing Role: Triggers low-power DAC and display dimming when BATT drops below 2.0V; enables full recovery only after 140ms stabilization above 2.7V. Use Value: Prevents audible click artifacts during battery sag by avoiding rapid enable/disable cycling of audio subsystems. |
| Electronic Toys | Cell Phones / Cordless Phones |
Use Scenario: Voice-recognition toy with intermittent microphone activation and LED feedback. IC Role / Device Role / Timing Role: Asserts LBO to halt voice processing and reduce LED brightness when battery falls to 2.0V; holds LBO asserted until stable >2.7V. Use Value: Eliminates erratic behavior (e.g., false wake-ups) caused by momentary voltage dips during motor or speaker activation. |
Use Scenario: Legacy DECT cordless phone base station with NiMH backup battery (2.4V nominal). IC Role / Device Role / Timing Role: Detects weak battery condition (2.0V) to prompt user charging alert; uses 140ms timeout to ignore brief dips during ring signal bursts. Use Value: Reduces false low-battery warnings by 93% compared to comparator-only solutions lacking built-in hysteresis timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6428EHUR-T | Same SOT23-3 package and 1µA current, but VLTH = 2.1V / VHTH = 2.8V - higher trip points for longer runtime in high-voltage alkaline systems. | Preferred for 3-cell alkaline (4.5V initial) where earlier warning at 2.1V improves user experience vs. 2.0V cutoff. | Select when system firmware expects slightly higher low-battery threshold to extend perceived battery life. |
| TLV7031DBVR | Single comparator (no integrated hysteresis or timeout), 650nA IQ, rail-to-rail input - requires external RC network to emulate 140ms delay and hysteresis. | Suitable only for designs with available GPIO and firmware resources to implement timing logic; adds BOM cost and layout area. | Choose only if custom hysteresis profile or sub-1µA current is mandatory and design team can manage timing implementation. |
Compared with MAX6427EHUR-T, MAX6428EHUR-T offers marginally higher thresholds for extended alkaline runtime, while TLV7031DBVR demands external components to replicate hysteresis and timeout - increasing design complexity and reducing reliability in volume production.
Availability
MAX6427EHUR-T is available at Aetrix Electronics and suitable for portable medical devices, MP3 players, electronic toys, and cordless phones requiring stable component supply across industrial temperature ranges and long product lifecycles.
Supply support for MAX6427EHUR-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 precision analog, mixed-signal, and power management ICs for industrial, medical, and consumer applications.
The MAX6427–MAX6438 family was designed specifically for ultra-low-power battery state monitoring in space- and energy-constrained portable electronics - delivering factory-calibrated accuracy without external components.
FAQ
What is the exact low-battery threshold voltage for MAX6427EHUR-T?
The MAX6427EHUR-T has a factory-trimmed low-threshold voltage (VLTH) of 2.0V ±2.5%, meaning it asserts the LBO output when the BATT voltage falls below 1.95V to 2.05V. This value is laser-trimmed during production and does not require external calibration - confirmed in Maxim's datasheet Table 1 for "EI" suffix variants.
Does MAX6427EHUR-T require external resistors or capacitors to operate?
No, MAX6427EHUR-T requires zero external components. Its thresholds, hysteresis, and 140ms timeout are fully integrated. The device operates with only BATT, GND, and LBO connections - verified in the Typical Operating Circuit (page 14) and Pin Description (page 6) of the official datasheet.
Can MAX6427EHUR-T function reliably when battery voltage drops to 1.0V?
Yes, MAX6427EHUR-T guarantees valid LBO logic state down to BATT = 1.0V, as stated in the Features list and Electrical Characteristics table. This ensures deterministic low-battery signaling even during deep discharge of alkaline or NiMH cells - critical for fail-safe shutdown in medical devices.
What is the purpose of the 140ms timeout period in MAX6427EHUR-T?
The 140ms minimum timeout ensures the LBO output remains asserted after BATT rises above VHTH (2.7V) until voltage stabilizes - preventing premature reactivation due to transient recovery spikes after load removal. This behavior is inherent to the internal timing circuit and requires no external adjustment.
Is MAX6427EHUR-T compatible with lithium-ion, alkaline, and NiMH battery chemistries?
Yes, MAX6427EHUR-T supports single-cell Li+ (2.7–4.2V), two-cell alkaline/NiMH (1.8–3.0V), and three-cell alkaline/NiCd (2.7–4.5V) configurations. Its 1.0V–5.5V operating range and factory-trimmed 2.0V/2.7V thresholds align precisely with common discharge curves across these chemistries - per Applications section on page 1.
MAX6427EHUR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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-23-3
MAX6427EHUR-T FAQ
1.How can I place an order for MAX6427EHUR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6427EHUR-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 MAX6427EHUR-T reliable?
The price and inventory of MAX6427EHUR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6427EHUR-T is usually 5 days.
3.What payment methods are accepted for MAX6427EHUR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6427EHUR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6427EHUR-T?
MAX6427EHUR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6427EHUR-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 MAX6427EHUR-T?
For technical support, including MAX6427EHUR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6427EHUR-T requirements.
6.How does Aetrix verify that MAX6427EHUR-T is sourced from the original manufacturer or authorized distributors?
All MAX6427EHUR-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 MAX6427EHUR-T meets industry standards.
7.What is the process for return or replacement of MAX6427EHUR-T?
All MAX6427EHUR-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6427EHUR-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 MAX6427EHUR-T part is unused and in its original packaging.
Return procedure for MAX6427EHUR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6427EHUR-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…
