 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
ACS8520AT Datasheet(PDF) 1 Page - Semtech Corporation |
|
||||||||||||||||||||||||||||||
ACS8520AT Datasheet(HTML) 1 Page - Semtech Corporation |
|
|
1 / 150 page  Revision 1.00/September 2007© Semtech Corp. Page 1 www.semtech.com ACS8520A SETS ADVANCED COMMUNICATIONS FINAL Synchronous Equipment Timing Source for Stratum 3/4E/4 and SMC Systems ADVANCED COMMS & SENSING FINAL DATASHEET The ACS8520A is a highly integrated, single-chip solution for the Synchronous Equipment Timing Source (SETS) function in a SONET or SDH Network Element. The device generates SONET or SDH Equipment Clocks (SEC) and Frame Synchronization clocks. The ACS8520A is fully compliant with the required international specifications and standards. The device supports Free-run, Locked and Holdover modes. It also supports all three types of reference clock source: recovered line clock, PDH network, and node synchronization. The ACS8520A generates independent SEC and BITS/SSU clocks, an 8 kHz Frame Synchronization clock and a 2 kHz Multi-Frame Synchronization clock. Two ACS8520A devices can be used together in a Master/ Slave configuration mode allowing system protection against a single ACS8520A failure. A microprocessor port is incorporated, providing access to the configuration and status registers for device setup and monitoring. The ACS8520A supports IEEE 1149.1[5] JTAG boundary scan. The user can choose between OCXO or TCXO to define the Stratum and/or Holdover performance required. Suitable for Stratum 3, 4E, 4 and SONET Minimum Clock (SMC) or SONET/SDH Equipment Clock (SEC) applications Meets Telcordia 1244-CORE[19] Stratum 3 and GR-253[17], and ITU-T G.813[11] Options Ι and ΙΙ specifications Accepts 14 individual input reference clocks, all with robust input clock source quality monitoring. Simultaneously generates nine output clocks, plus two Sync pulse outputs Absolute Holdover accuracy better than 3 x 10-10 (manual), 7.5 x 10-14 (instantaneous); Holdover stability defined by choice of external XO Programmable PLL bandwidth, for wander and jitter tracking/attenuation, 0.1 Hz to 70 Hz in 10 steps Automatic hit-less source switchover on loss of input Microprocessor interface - Intel, Motorola, Serial, Multiplexed, or boot from EPROM Output phase adjustment in 6 ps steps up to ±200 ns IEEE 1149.1 JTAG Boundary Scan Single 3.3 V operation Available in LQFP 100 package Lead (Pb) - free version available (ACS8520AT), RoHS and WEEE compliant. Figure 1 Block Diagram of the ACS8520A SETS Block Diagram Description Features IEEE 1149.1 JTAG Input Port Monitors and Selection Control 14 x SEC Optional Divider, 1/n n = 1 to 214 Optional Divider, 1/n n = 1 to 214 PFD Digital Loop Filter Chip Clock Generator DTO TCK TDI TMS TRST TDO F8520P_001BLOCKDIA_03 T4 Selector T0 Selector PFD Digital Loop Filter DTO T4 APLL Frequency Dividers T0 APLL (output) Frequency Dividers TO APLL (feedback) TO8 & TO9 TO10 & TO11 TO1 to TO7 Outputs T01-TO7: E1/DS1 (2.048/ 1.544 MHz) and frequency multiples: 1.5 x, 2 x, 3 x 4 x, 6 x, 12 x 16 x and 24 x E3/DS3 2 kHz 8 kHz and OC-N* rates OC-N* rates = OC-1 51.84 MHz OC-3 155.52 MHz and derivatives: 6.48 MHz 19.44 MHz 25.92 MHz 38.88 MHz 51.84 MHz 77.76 MHz 155.52 MHz 311.04 MHz T08: AMI TO9: E1/DS1 2 x AMI 10 x TTL 2 x PECL/LVDS Programmable; 64/8 kHz (AMI) 2 kHz 4 kHz N x 8 kHz 1.544/2.048 MHz 6.48 MHz 19.44 MHz 25.92 MHz 38.88 MHz 51.84 MHz 77.76 MHz 155.52 MHz TO10: 8 kHz (FrSync) TO11: 2 kHz (MFrSync) Output Ports Priority Table Register Set Microprocessor Port OCXO or TCXO T4 DPLL/Freq. Synthesis T0 DPLL/Freq. Synthesis |
Similar Part No. - ACS8520AT |
|
Similar Description - ACS8520AT |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
