TQ8033 Ver la hoja de datos (PDF) - TriQuint Semiconductor

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Fabricante

TQ8033

1.5 Gbit/sec 64x33 Expandable Crosspoint Switch

TriQuint Semiconductor 

TQ8033

DATA SHEET

Building Switch Arrays with the TQ8033

By eliminating the need to “wire-or” the outputs of

multiple devices or to add additional switch elements to

get the necessary routing channels, the TQ8033 offers

the highest performance solution with the least number

of devices for implementing larger array sizes.

The 33rd output port provides an additional data

channel for system data links or for diagnostics system

monitoring of each switch element within the array. The

following examples show how to interconnect multiple

TQ8033 devices to create a 64x64 and a 128x128

switch array.

64x64 Switch Array

To implement a 64x64 array (figure 2), only two

TQ8033 devices are required and the data passes

through only one switch element. For applications with

data rates less than one gigabit per second, a technique

known as"fly-by" termination offers good signal fidelity

with the minimum number of components. To

implemement, both the input signal pairs (true and

complement) are routed to both devices and then to the

termination network at the end of the signal trace with

the minimum number of trace discontinuities.

To accomplish this, route the trace from the source

device to the first TQ8033 input pad and then continue

the signal trace from the input pads to the next device,

and finally to the termination network.

For applications at data rates above one gigabit per

second, it is recommended to use a fan-out buffer to

drive each TQ8033 input as shown in figure 3.

As with any high speed interconnect, careful attention

to the impedance of the signal traces is very important.

D0

O0

TQ8033

D63

O31

O32

TQ8033

O63

50 Ω

50 Ω

VTT

Figure 2. 64x64 array with "fly-by" termination

Dn/

NDn

Connect one driver

output to each

common TQ8033

input

Figure 3. Optional fan-out buffer for array expansion

4

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