MH88625 データシートの表示（PDF） - Mitel Networks

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MH88625

DID/OPS Subscriber line interface circuit (SLIC) for on/off premise PBX line cards, DID line cards and central office cards.

Mitel Networks 

Preliminary Information

MH88625

MH88625

24

Z2

NC

MH88625

24

Z2

NC

Z1 23

22

Z900

NC

32

Z600

Z1 23

22

Z900

32

Z600

NC

Input impedance (Zin) set to 600Ω

Note: Make connection between Z1 and other points as short as possible

Input Impedance (Zin) set to 900Ω

Figure 4 - Input Impedance (Zin) Settings with Zin equal to 600 or 900Ω

MH88625

24

Z2

23

Z1

22

Z900

10 x Zin

RP

Z2

CP

Z1

RS

32

Z600

(RS + 1)

Zin = 0.1 x 1/RP + S x CP

where S = j x w

and w = 2 x Π x f

Notes:

1) The 10xZin network must be set to 10 x the desired input impedance (Zin).

2) The network balance must be set to the desired network balance. See

section on network balance.

3) Make connection between Z1 and component as short as possible.

Example:

If RS = 2200Ω, RP = 8200Ω, CP= 11.5nf

Then the input impedance (Zin) is 220Ω in

series with 820Ω in parallel with 115nF.

Figure 5 - Input Impedance (Zin) Settings with Zin not equal to 600 to 900Ω

2-191

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