LTC4300-2CMS8#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LTC4300-2CMS8#PBF is a hot-swappable 2-wire I2C/SMBus bus buffer that isolates capacitance and enables live-insertion of cards without corrupting the bus, packaged in an 8-pin MSOP for compact designs.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- NOT RECOMMENDED
- Datasheet
- LTC4300-2CMS8#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.4500(MOQ 19)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Hot-swap capability allows live card insertion and removal on I2C/SMBus without corrupting bus transactions or glitching SCL/SDA
- Bidirectional 2-wire buffer isolates downstream bus capacitance, extending fan-out beyond standard 400 pF I2C limit
- 8-pin MSOP package enables tight integration on backplane management or server blade power-management circuits
Applications
The LTC4300-2CMS8#PBF is used in server blade management, hot-plug PCI and PCIe accessory cards, and telecom line-card platforms where I2C or SMBus devices must be added or removed while the system bus remains active. Its capacitance isolation ensures that inserting a card loaded with multiple I2C peripherals does not overload the main bus, preserving signal integrity for all connected devices.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1660 |
| YTEOL | 3 |
| Adjustable Threshold | NO |
| Analog IC - Other Type | HOT SWAP CONTROLLER |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Channels | 1 |
| Number of Functions | 2 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.7V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
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 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the LTC4300-2CMS8#PBF enable hot-swap insertion on an active I2C bus without corrupting existing transactions?
The LTC4300-2CMS8 connects to the upstream bus only after the downstream card voltage has risen and stabilized, using an internal power-on sequencing circuit that delays the bus connection by approximately 5 µs to 10 µs. This prevents the card's bus capacitance from pulling SCL or SDA low during insertion, which would look like a START condition and corrupt an in-progress transaction.
What is the maximum downstream bus capacitance the LTC4300-2CMS8 can buffer, and how does it extend I2C fan-out?
The LTC4300-2CMS8 isolates the downstream bus, allowing the downstream segment to carry up to several hundred pF of capacitance from multiple slave devices without violating the 400 pF limit seen by the upstream master. This effectively allows system designers to connect 8 to 16 additional I2C peripherals on the downstream side while the upstream bus remains compliant with 400 kHz Fast Mode timing.
In which server or telecom infrastructure designs is the LTC4300-2CMS8#PBF commonly deployed?
This bus buffer is commonly used on ATCA and MicroTCA blade server management buses, hot-plug hard drive backplanes, and telecom chassis SMBus architectures where field-replaceable line cards must connect to a live I2C management network. The 8-pin MSOP package allows placement directly on the card-edge power management circuit within a few millimeters of the board connector.
What supply voltage range does the LTC4300-2CMS8 support, and is it compatible with both 3.3 V and 5 V I2C systems?
The LTC4300-2 operates from a 2.7 V to 5.5 V supply and supports both 3.3 V and 5 V logic levels on the bus pins, making it compatible with legacy 5 V SMBus systems as well as modern 3.3 V I2C networks. This dual-voltage compatibility allows a single part to bridge between 5 V backplane buses and 3.3 V blade management controllers without level-shifting hardware.
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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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