Synchronous Equipment Timing Source PLL
  • ACS8509
  • Synchronous Equipment Timing Source for SONET or SDH Network Elements
  • ACS8510
  • Rev 2.1 Synchronous Equipment Timing Source for SONET or SDH Network Elements
  • ACS8514
  • Synchronous Equipment Timing Source Partner IC for 2nd T4 DPLL, Accurate Monitoring & Input Extender
  • ACS8515
  • Rev 2.1 Line Card Protection Switch for SONET or SDH Network Elements
  • ACS8520
  • Synchronous Equipment Timing Source (SETS) for Stratum 3/4E/4 and SMC Systems
  • ACS8520A
  • SETS Lite Synchronous Equipment Timing Source for Stratum 3/4E/4 and SMC Systems
  • ACS8522
  • SETS Lite Synchronous Equipment Timing Source for Stratum 3/4E/4 and SMC Systems
  • ACS8522A
  • SETS LITE Synchronous Equipment Timing Source for Stratum 3/4E/4 and SMC Systems
Semtech ACS8526

Semtech ACS8526

LC/P Lite Line Card Protection Switch for PDH, SONET, or SDH Systems

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  • Has fast activity monitors on the inputs, and raises a flag on a pin upon loss of activity on the selected input
  • Protection switching between input reference clock sources is controlled by an external pin
  • Has two SEC reference clock input ports, configured for expected frequency by setting hardware pins or by writing to registers via the serial interface
  • Can perform frequency translation, converting, for example, an 8 kHz SEC input clock from a backplane into a 155.52 MHz clock for local line cards
  • Generates two independent SEC clock outputs, one on a PECL/LVDS port and one on a TTL/CMOS port, at spot frequencies configured by hardware pins, or by writing to registers via the serial interface
  • Hardware selectable spot frequencies range from 1.544 MHz up to 155.52 MHz, with further options for N x E1/DS1 and 311.04 MHz via register selection
  • Provides an 8 kHz Frame Sync output and 2 kHz Multi-Frame Sync output, both with programmable pulse width and polarity
  • Advanced configuration possibilities are available via the SPI-compatible serial port, however the basic configuration of I/O frequencies and SONET/SDH selection by hardware make the device suitable for standalone operation, i.e., no need for a microprocessor.

Features


  • Line card protection switch - partners Semtech SETS devices for Stratum 3E/3/4E/4 PDH, SONET/SDH applications
  • High performance DPLL/APLL solution
  • Output jitter compliant to STM-1
  • Two independent SEC inputs ports (TTL)
  • Four independent output ports: .ul
  • Two clock ports: one PECL/LVDS, one TTL
  • Two Syncs (TTL): 8 kHz FrSync & 2 kHz MFrSync./ul
  • TTL I/O ports: spot frequencies 2 kHz to 77.76 MHz
  • PECL/LVDS port: spot frequencies 2 kHz to 311 MHz
  • N x E1/DS1 mode
  • Programmable pulse width and polarity on Syncs
  • SONET/SDH frequency translation
  • Digital Holdover mode on input failure
  • Separate activity monitors and register alarms on each input
  • "Loss of activity" on selected input flagged on dedicated pin
  • Source switch under external hardware control
  • PLL "Locked" and "Acquisition" bandwidth selectable from 18, 35 or 70 Hz
  • Configurable via serial interface or hardware pins
  • Output clock phase continuity to GR-1244-CORE
  • Single 3.3 V operation, 5 V I/O compatible
  • IEEE 1149.1 JTAG Boundary Scan is supported
  • Operating temperature (ambient) of -40 to +85 °C
  • Available in 64-pin LQFP package

Applications


Packaging

LQFP64

Order Codes

  • ACS8526 : NCNR, 160 per tray, ok to order partial tray quantities
 
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