ACS8515LC datasheet(11/47 Pages) SEMTECH

Part #	ACS8515LC

Description	Line Card Protection Switch for SONET or SDH Network Elements

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Manufacturer	SEMTECH [Semtech Corporation]

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Revision 2.05/Jan 2001 ã2001 Semtech Corp

www.semtech.com

11

ACS8515 LC/P

ADVANCED COMMUNCIATIONS

FINAL

Figure 2: Minimum Input Jitter Tolerance for inputs supporting G.703 compliant sources

Table 4: Amplitude and Frequency values for Jitter Tolerance for inputs supporting G.703 compliant sources

e

p

y

T.

c

e

p

S

e

d

u

ti

l

p

m

A

)

k

p

-

k

p

I

U

(

y

c

n

e

u

q

e

r

F

)

z

H

(

1

A2

A1

F2

F3

F4

F

1

S

DE

R

O

C

-

4

2

1

-

R

G

51

.

00

10

0

5k

8k

0

4

1

E3

2

8

.

G

U

T

I

5

.

12

.

00

2k

4

.

2k

8

1k

0

1

I

$

3HDNWRSHDN MLWWHU DQG ZDQGHUDPSOLWXGH ORJ

VFDOH

-LWWHU DQG ZDQGHU IUHTXHQF\ ORJ VFDOH

I

$

3HDNWRSHDN MLWWHU DQG ZDQGHUDPSOLWXGH ORJ

VFDOH

-LWWHU DQG ZDQGHU IUHTXHQF\ ORJ VFDOH

Low-speed Output Clock

The O2 SEC clock is supplied on a TTL port with

a fixed frequency of 19.44 MHz.

High-speed Output Clock

The O1 SEC clock is supplied on a PECL/LVDS

port with spot frequencies of 19.44 MHz, 38.88

MHz, 155.52 MHz, 311.04 MHz and Dig 1

(where Dig 1 is 1.544/2.048 MHz and multiples

of 2, 4 and 8 depending on SONET/SDH mode

setting). The actual frequency is selectable via

the cnfg_differential_outputs register. The O1

port can also support 311.04 MHz, which is

enabled via the cnfg_T0_output_enable

register. The O1 port can be made LVDS or

PECL

compatible

via

the

cnfg_differential_outputs register.

Frame Sync and Multi-Frame Sync Clocks

Frame Sync (8 kHz) and Multi-Frame Sync (2

kHz) clocks will be provided on outputs FrSync

and MFrSync. The FrSync and MFrSync clocks

have a 50:50 mark space ratio.

Output Wander and Jitter

Wander and jitter present on the output clocks

are dependent on:

The magnitude of wander and jitter on the selected

input reference clock (in locked mode);

The internal wander and jitter transfer characteristic

(in locked mode);

The jitter on the local oscillator clock;

The wander on the local oscillator clock (in Hold-Over

mode).

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