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- TCA4311A - TI
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Manufacturer:TI
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ManyChip's Part#:MC322796053
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Package:MSOP-8
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Datasheet:Datasheet 3D Model
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Description:The TCA4311A is a hot swappable I2C bus buffer that supports I/O card insertion into a live backplane without corruption of the data and clock busses
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Stock Locations:
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Availability:301 pcs In Stock
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MOQ:1 pcs
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Unit Price:$ 0
Updated at 18/06/2026 10:30:15(UTC+8)
Certifications
ManyChip is committed to product quality and safety with ISO 9001, ISO 13485, ISO 45001, UL, RoHS, CQC and REACH certifications.
Description
- The TCA4311A is a hot-swappable I2C bus buffer that supports I/O card insertion into a live backplane without corruption of the data and clock busses. Control circuitry prevents the backplane from being connected to the card until a stop command or bus idle occurs on the backplane without bus contention on the card. When the connection is made, this device provides bidirectional buffering, keeping the backplane and card capacitances isolated. During insertion, the SDA and SCL lines are pre-charged to 1 V to minimize the current required to charge the parasitic capacitance of the chip.
- When the I2C bus is idle, the TCA4311A can be put into shutdown mode by setting the EN pin low. When EN is high, the TCA4311A resumes normal operation. It also includes an open drain READY output pin, which indicates that the backplane and card sides are connected together. When READY is high, the SDAIN and SCLIN are connected to SDAOUT and SCLOUT. When the two sides are disconnected, READY is low.
- Both the backplane and card may be powered with supply voltages ranging from 2.7 V to 5.5 V, with no restrictions on which supply voltage is higher.
- The TCA4311A has standard open-drain I/Os. The size of the pull-up resistors to the I/Os depends on the system, but each side of this buffer must have a pull-up resistor. The device is designed to work with Standard Mode and Fast Mode I2C devices in addition to SMBus devices. Standard Mode I2C devices only specify 3 mA in a generic I2C system where Standard Mode devices and multiple masters are possible. Under certain conditions, high termination currents can be used.
- Operating Power-Supply Voltage Range of 2.7 V to 5.5 V
- Supports Bidirectional Data Transfer of I2C Bus Signals
- SDA and SCL Lines are Buffered Which Increases Fanout
- 1-V Precharge on all SDA and SCL Lines Prevents Corruption During Live Board Insertion and Removal From Backplane
- SDA and SCL Input Lines are Isolated From Outputs
- Accommodates Standard Mode and Fast Mode I2C Devices
- Improved Noise Immunity
- Applications Include Hot Board Insertion and Bus Extension
- Low ICC Chip Disable of < 1 μA
- READY Open-Drain Output
- Supports Clock Stretching, Arbitration, and Synchronization
- Powered-Off High-Impedance I2C Pins
- Open-Drain I2C Pins
- Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
- ESD Protection Exceeds JESD 22
- 8000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model (C101)
TCA4311A Specifications
| Attribute | Attribute Value |
|---|---|
| Datasheet | Datasheet |
| 3D Model | 3D Model |
| Case/Package | MSOP-8 |
| Number of Outputs | 2 Output |
| Show | |
| Product Lifecycle Status | |
| RoHS | RoHS Compliant |
| Lead-Free Status | Lead Free |
Order guide
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- Please confirm with the logistics company in advance for remote areas.
(Additional charges ($35-$50) may apply for delivery in these areas)
- Delivery date: usually 2 to 7 working days.
- A tracking number will be sent after your order ships.
- - Carefully inspected and packed by ManyChip warehouse - Vacuum packaging - Anti-static packaging - Shockproof foam
- The terms here are for reference only, the actual terms are subject to the sales quotation. - Please confirm product specifications when ordering. - MOQ refers to the minimum order quantity required to purchase each part. - If you have special ordering instructions, please indicate them on the ordering page. - Inspection (PSI) will be performed prior to shipment.
- - Income Quality Control (IQC), 1000+ qualified dealers. - Chips are tested by authoritative organizations to ensure the quality, authenticity and safety of your device. - Decapsulation control - X-ray control - XRF inspection - Electrical testing - Surface testing -Digital components warehouse, covering an area of 800 square meters, with constant temperature and humidity
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