LTC4331CUFD#PBF Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
Analog Devices LTC4331CUFD#PBF is an I2C slave extender over differential link, using EIA-485 differential signaling to extend standard I2C buses over long cable runs, housed in a 20-pin QFN package for industrial and distributed sensor network designs.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- LTC4331CUFD#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.8600(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LTC4331CUFD#PBF?
- Extends I2C slave devices over long differential cable runs using EIA-485 signaling
- Differential input/output interface with superior noise immunity over single-ended I2C
- Compact 20-pin QFN package enabling dense multi-node PCB layouts
- Enables multi-drop topologies for distributed sensor networks up to hundreds of metres
- Compatible with standard I2C host controllers without firmware changes
What is LTC4331CUFD#PBF used for?
The LTC4331CUFD#PBF allows engineers to place I2C peripheral devices such as sensors and EEPROMs far from the host microcontroller by converting the standard 2-wire bus to a robust EIA-485 differential link. This is especially valuable in industrial automation, building control, and robotics applications where sensors may be tens of metres away from the controller and single-ended I2C would suffer from excessive capacitance and noise pickup.
What are the specifications of LTC4331CUFD#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1711 |
| YTEOL | 9 |
| Differential Output | YES |
| Driver Number of Bits | 1 |
| Input Characteristics | DIFFERENTIAL |
| Interface IC Type | LINE TRANSCEIVER |
| Interface Standard | EIA-485 |
| JESD-30 Code | R-PQCC-N20 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Out Swing-Min | 1.5V |
| Output Characteristics | 3-STATE |
| Output Low Current-Max | 0.02A |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC20,.16X.2,20 |
| Package Shape | RECTANGULAR |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Receiver Number of Bits | 1 |
| Supply Current-Max | 0.14mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 1.62V |
| Supply Voltage-Nom | 3.3V |
| Supply Voltage1-Max | 5.5V |
| Supply Voltage1-Min | 3V |
| Supply Voltage1-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Where can I find the LTC4331CUFD#PBF datasheet?
LTC4331CUFD#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LTC4331CUFD#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How far can the LTC4331CUFD#PBF extend an I2C bus over differential cable, and what cable type is recommended?
Using EIA-485 differential signaling, the LTC4331CUFD#PBF can extend an I2C slave device over cable runs of 100 metres or more with shielded twisted-pair cable such as Cat 5e. At standard 100 kHz or 400 kHz I2C clock rates, the differential link maintains reliable data integrity despite the distributed cable capacitance that would otherwise limit single-ended I2C to a few metres.
Can LTC4331CUFD#PBF be used in multi-drop topologies where several sensor nodes share one differential bus?
Yes — the EIA-485 interface supports up to 32 unit loads on a single bus segment, allowing multiple LTC4331 nodes to share a single twisted-pair cable back to the host controller. Each node selects a unique I2C address via address pins, so the host can address up to 128 distinct peripheral devices across multiple extended links within the 7-bit I2C address space.
For an industrial sensor cabinet design, does the 20-pin QFN footprint of LTC4331CUFD#PBF offer meaningful space savings over SOIC alternatives?
The 20-pin QFN package occupies approximately 16 mm² (4×4 mm body) compared to roughly 75 mm² for a 20-pin SOIC, delivering nearly a 5× footprint reduction. In a compact DIN-rail module housing a dozen I2C bus extenders, this difference translates to significant PCB area savings that can allow additional signal conditioning or protection circuitry to be included in the same chassis.
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Why Buy from FindMyChip
About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $9.3800 | $9.38 |
| 10+ | $6.3400 | $63.40 |
| 292+ | $6.2600 | $1827.92 |
| 511+ | $6.0700 | $3101.77 |
| 1000+ | $3.8600 | $3860.00 |
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