AD8153 datasheet(13/24 Pages) AD

13 / 24 page

AD8153

Rev. 0 | Page 13 of 24

THEORY OF OPERATION

The AD8153 consists of a 2:1 multiplexer and a 1:2 demultiplexer.

There are three operating modes: pin mode, serial mode, and

mixed mode. In pin mode, lane switching, equalization, and

pre-emphasis are controlled using external pins. In serial mode,

an I2C interface is used to control the device and to provide

access to advanced features, such as additional pre-emphasis

settings and output disable. In mixed mode, the user accesses

the advanced features using I2C but controls lane switching

using external pins.

SWITCH CONFIGURATIONS

On the demultiplexer side, the AD8153 relays received data on

Input Port C to Output Port A and/or Output Port B, depending

on the state of the BICAST and SEL bits. On the multiplexer

side, the device relays received data on either Input Port A or Input

Port B to Output Port C, depending on the state of the SEL bit.

When bicast mode is off, the outputs of either Port A or Port B

are in an idle state. In the idle state, the output tail current is set

to 0, and the P and N sides of the lane are pulled up to the output

termination voltage through the on-chip termination resistors.

The device also supports loopback on all ports, illustrated in

Figure 31. Enabling loopback on any port overrides configurations

set by the BICAST and SEL control bits. Table 5 summarizes the

possible switch configurations.

The AD8153 output disable feature can be used to force an

output into the idle (powered-down) state. This feature is only

accessible through the serial control interface.

1:2 DEMUX

2:1 MUX

INPUT C

OUTPUT C

PORT C LOOPLOCK

OUTPUT A

OUTPUT B

INPUT A

INPUT B

PORT A LOOPBACK

PORT B LOOPBACK

Figure 31. Loopback Configurations

Table 5. Switch Configurations

LB_A

LB_B

LB_C

SEL

BICAST

Output A

Output B

Output C

Input C

Idle

Input A

Input C

Input A

Idle

Input C

Input B

Input C

Input B

Input C

Idle

Input C

Idle

Input C

Input B

Input A

Idle

Input B

Input C

Input B

Input C

Input B

Input C

Idle

Input B

Input C

Input B

Input C

Input A

Idle

Input A

Input C

Input A

Input C

Input B

Input A

Idle

Input C

AD8153 bảng dữ liệu(PDF) 13 Page - Analog Devices

AD8153 bảng dữ liệu(HTML) 13 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

bảng dữ liệu tải về

Link URL