LTC4301LCDD#PBF Analog Devices Integrated Circuit (Small Outline No-lead) In Stock
LTC4301LCDD#PBF is an Analog Devices supply-independent I2C bus buffer in an 8-pin DFN package that isolates capacitive loads and enables hot-swappable bus segments. It supports bidirectional SDA and SCL buffering across different supply voltage domains without requiring matched supply rails. Available in stock with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Small Outline No-lead
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LTC4301LCDD#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.2900(MOQ 10)
- 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 LTC4301LCDD#PBF?
- Supply-independent operation buffers I2C signals across mismatched voltage domains from 1.8 V to 5.5 V without external level translators
- Capacitive load isolation allows downstream I2C bus segments to drive up to 400 pF while the upstream bus sees only the buffer's low input capacitance
- Hot-swap safe design with controlled bus rise times prevents I2C bus lockup when inserting or removing boards with live I2C connections
- 10-year estimated time on market ensures long-term availability for industrial and medical designs with extended production commitments
What is LTC4301LCDD#PBF used for?
LTC4301LCDD#PBF is ideal for systems where multiple I2C peripheral boards with heavy bus capacitance are connected to a single master controller, such as sensor hub backplanes, battery management systems, and FPGA development boards with plug-in modules. The supply-independent design simplifies mixed-voltage system integration where a 3.3 V microcontroller must communicate with 1.8 V sensors or 5 V EEPROMs without external level-shifting circuits. Its hot-swap capability supports I2C segments that must remain live during board insertion or removal in telecom and industrial rack systems.
What are the specifications of LTC4301LCDD#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1698 |
| YTEOL | 10 |
| Interface IC Type | BUS BUFFERS |
| JESD-30 Code | S-PDSO-N8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 2.7V |
| Supply Voltage-Nom | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline 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 LTC4301LCDD#PBF datasheet?
LTC4301LCDD#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LTC4301LCDD#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does LTC4301LCDD#PBF extend the I2C bus reach in a system with many peripheral devices?
LTC4301LCDD#PBF isolates the downstream I2C segment's capacitive load from the master's bus, allowing the downstream segment to accumulate up to 400 pF of total bus capacitance from multiple peripheral ICs without slowing the SCL rise time on the master's segment below the 400 kHz Fast Mode or 100 kHz Standard Mode specification. Without a buffer, a bus with 10 or more devices at 10 pF to 20 pF each would exceed the 400 pF I2C specification limit and cause communication failures.
What voltage domains does LTC4301LCDD#PBF support, and how does supply-independent operation simplify mixed-voltage designs?
The LTC4301LCDD#PBF operates with its upstream and downstream I2C supply rails independently ranging from 1.8 V to 5.5 V, meaning a 3.3 V microcontroller can communicate through the buffer to 1.8 V sensors or 5 V legacy peripherals without any discrete level-shifter or pull-up resistor adjustment. This eliminates at least one translation circuit per buffer, saves 3 to 5 passive components per bus segment, and reduces design complexity in multi-rail systems such as dual-supply SoC platforms.
What makes LTC4301LCDD#PBF suitable for hot-swap I2C bus segments in rack or backplane systems?
During hot insertion of a board with I2C peripherals, the LTC4301LCDD#PBF controls the SCL and SDA rise slopes to prevent the sudden bus capacitance change from glitching the active I2C bus seen by the master. The controlled slew rate ensures that bus voltage transitions remain within the 300 ns rise-time specification for Fast Mode 400 kHz I2C even when a new board with 100 pF or more of peripheral capacitance plugs into a live backplane, preventing bus lockup or false START/STOP conditions that would hang the master controller.
How does the DFN-8 package of LTC4301LCDD#PBF compare to an SOIC-8 for PCB space savings in dense digital designs?
The LTC4301LCDD#PBF's DFN-8 (S-PDSO-N8) package occupies approximately 3 mm × 3 mm of PCB area with a very thin 0.75 mm profile, compared to an SOIC-8's footprint of roughly 5 mm × 4 mm and 1.75 mm height. This saves approximately 11 mm² of board area per buffer IC and reduces the package height by 1 mm, which is significant in stacked PCB designs or low-profile enclosures where board-to-board clearance is limited to less than 5 mm.
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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 |
|---|---|---|
| 10+ | $5.5870 | $55.87 |
| 19+ | $4.3600 | $82.84 |
| 1000+ | $3.2900 | $3290.00 |
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