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ACS8515P Datasheet

  • ACS8515P

  • Line Card Protection Switch for SONET or SDH Network Element...

  • 590.34KB

  • 47頁(yè)

  • SEMTECH   SEMTECH

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ADVANCED COMMUNCIATIONS
Description
The ACS8515 is a highly integrated, single-chip
solution for 聯(lián)hit-less聰 protection switching of SEC
clocks from Master and Slave SETS clockcards
in a SONET or SDH Network Element. The
ACS8515 has fast activity monitors on the in-
puts and will implement automatic system pro-
tection switching against master clock failure. A
further input is provided for an optional standby
SEC clock. The ACS8515 is fully compliant with
the required specifications and standards.
The ACS8515 can perform frequency translation
from a SEC input clock distributed along a back
plane to a different local line card clock, e.g. 8
kHz distributed on the back plane and 19.44 MHz
generated on the line cards.
An SPI serial port is incorporated, providing ac-
cess to the configuration and status registers for
device setup.
The ACS8515 can utilise either a low cost XO
oscillator module, or a TCXO with full tempera-
ture calibration - as required by the application.
Block Diagram
Line Card Protection Switch
for SONET or SDH Network Elements
FINAL
Features
聲Suitable for Stratum 3, 4E and 4 SONET
or SDH Equipment Clock (SEC) applications
聲Meets AT&T, ITU-T, ETSI and Telcordia
specifications
聲Three SEC input clocks, from 2 kHz to 155.52
MHz
聲Generates two SEC output clocks, up to 311.04
MHz
聲Frequency translation of SEC input clock to a
different local line card clock
聲Robust input clock source frequency and
activity monitoring on all inputs
聲Supports Free-Run, Locked and Holdover
modes of operation
聲Automatic 聯(lián)hit-less聰 source switchover on loss
of input
聲External force fast switch between SEC inputs
聲Phase build-out for output clock phase
continuity during input switchover
聲SPI compatible serial microprocessor interface
聲Programmable wander and jitter tracking/
attenuation 0.1 Hz to 20 Hz
聲Single 3.3 v operation. 5 v I/O compatible
聲Operating temperature (ambient) -40擄C to
+85擄C
聲Available in 64 pin LQFP package
ACS8515 LC/P
3 x SEC Input
Master/Slave
+ Standby:
N x 8kHz
1.544MHz
2.048MHz
6.48M Hz
19.44MHz
38.88MHz
51.84MHz
77.76MHz
155.52MHz
Plus:
MFrSync
3xSEC
Input
Ports
MFrSync
APLL
DPLL
Frequency Synthesis
2xSEC
Output
Ports
FrSync
MFrSync
Monitors
Frequency
Dividers
2 x SEC Output
including:
1.544/2.048MHz
3.088/4.096MHz
6.176/8.192MHz
12.352/16.384MHz
19.44MHz
38.88MHz
155.52MHz
311.04MHz
Plus:
2kHz MFrSync
8kHz FrSync
Chip C lock
Generator
Priority
Table
Register
Set
SPI Compatible Serial
M icroprocessor Port
TCXO or XO
Revision 2.05/Jan 2001
茫2001
Semtech Corp
www.semtech.com

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