| Channel (In:Out) |
2:2 |
| IIC (Hz) |
100K
400K |
| Hot Swap |
YES |
| VCCA (Min) (V) |
2.3 |
| VCCA (Max) (V) |
5.5 |
| VCCB (Min) (V) |
-- |
| VCCB (Max) (V) |
-- |
| Temperature |
-40℃~105℃ |
| Package |
MSOP-8L |
1 Supports bidirectional data transfer of I2C bus signals
2 Operating power supply voltage range: 2.3V to 5.5V
3 Compatible with I2C-bus Standard-mode, I2C-bus Fast-mode, and SMBus standards
4 0Hz to 400KHz clock frequency
5 1V pre-charge on all SDA and SCL lines prevents corruption during live insertion
6 Built-in ∆V/∆t rise time accelerators(RTA) on all SDA and SCL lines (0.6V threshold), Requires the bus pull-up voltage and supply voltage (VCC) to be the same
7 Supports clock stretching and multiple master arbitration/synchronization
8 Active HIGH ENABLE input
9 Active HIGH READY open-drain output
10 High-impedance SDA and SCL pins for VCC=0V
11 Operation temperature range: -40°C~105°C
12 MSOP-8L package
AW9511 is a hot swappable I2C-bus and SMBus buffer that supports I/O card insertion into a live backplane without corrupting the data and clock lines. 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, the AW9511 provides bidirectional buffering, keeping the backplane and card capacitances isolated. During insertion, the SDA and SCL lines are pre-charged to 1V to minimize the current required to charge the parasitic capacitance of the device.
The AW9511 rise time accelerator circuitry allows the use of weaker DC pull-up currents while still meeting rise time requirements. When the I2C bus is idle, the AW9511 can be put into shutdown mode by setting the ENABLE pin low, reducing power consumption. When ENABLE pin is pulled high, the AW9511 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.
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