TCA9511ADGKR
Active2-BIT BIDIRECTIONAL 2.3- TO 5.5-V HOT SWAPPABLE 400-KHZ I2C/SMBUS BUFFER
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TCA9511ADGKR
Active2-BIT BIDIRECTIONAL 2.3- TO 5.5-V HOT SWAPPABLE 400-KHZ I2C/SMBUS BUFFER
Technical Specifications
Parameters and characteristics for this part
| Specification | TCA9511ADGKR |
|---|---|
| Applications | I2C - Hotswap |
| Capacitance - Input | 1.6 pF |
| Current - Supply | 3.5 mA |
| Delay Time | 70 ns |
| Mounting Type | Surface Mount |
| Number of Channels | 1 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 8-MSOP, 8-TSSOP |
| Package / Case | 3 mm |
| Package / Case [custom] | 0.118 in |
| Type | Buffer, Accelerator |
| Voltage - Supply [Max] | 5.5 V |
| Voltage - Supply [Min] | 2.3 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 1.48 | |
| 10 | $ 1.33 | |||
| 25 | $ 1.25 | |||
| 100 | $ 1.07 | |||
| 250 | $ 1.00 | |||
| 500 | $ 0.88 | |||
| Digi-Reel® | 1 | $ 1.48 | ||
| 10 | $ 1.33 | |||
| 25 | $ 1.25 | |||
| 100 | $ 1.07 | |||
| 250 | $ 1.00 | |||
| 500 | $ 0.88 | |||
| Tape & Reel (TR) | 2500 | $ 0.88 | ||
| Texas Instruments | LARGE T&R | 1 | $ 1.13 | |
| 100 | $ 0.93 | |||
| 250 | $ 0.67 | |||
| 1000 | $ 0.50 | |||
Description
General part information
TCA9511A Series
The TCA9511A is a hot-swappable I2C bus buffer that supports I/O card insertion into a live backplane without corruption of the data and clock lines. Control circuitry prevents the backplane-side I2C lines (in) from being connected to the card-side I2C lines (out) until a stop command or bus idle condition 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 device.
When the I2C bus is idle, the TCA9511A can be put into shutdown mode by setting the EN pin low, reducing power consumption. When EN is pulled high, the TCA9511A 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.
The TCA9511A is a hot-swappable I2C bus buffer that supports I/O card insertion into a live backplane without corruption of the data and clock lines. Control circuitry prevents the backplane-side I2C lines (in) from being connected to the card-side I2C lines (out) until a stop command or bus idle condition 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 device.
Documents
Technical documentation and resources