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PCI Bus Card Feature Matrix

Compared below is the latest in PCI bus card timing technology as well as legacy PCI products. The PCIe and PCI-V2 cards represent the newest in PCI technology and are the migration path for users of the legacy bc635PCI-U. Symmetricom is committed to extending the product lifecycle of its bus level timing cards for as long as possible to support customer designs. The PCI-SG 2U is a long standing PCI card that continues to be popular with the installed base of users. We offer this comparison to aid you in selecting the model best suited to your requirements and application.

  bc635PCIe bc635PCI-V2 bc635PCI-U PCI-SG 2U
  Product Lifecycle Status New New Legacy Legacy
Sync Inputs        
  GPS optional
(bc637PCIe)
170 nanosecond accuracy		 optional
(bc637PCI-V2) (1)
170 nanosecond accuracy		   optional
(GPS-PCI 2U)
1 microsecond accuracy
  1PPS
  AM and DCLS time code inputs
  IRIG A, B, IEEE 1344 (2)
  IRIG E, G, NASA 36, XR3, 2137    
Sync Outputs        
  1PPS
  IRIG B, IEEE 1344 (2)
  IRIG A, E, G, NASA 36, XR3, 2137    
  Simultaneous AM and DCLS time code outputs    
Timing Functions        
  Accuracy (3) 1 microsecond 1 microsecond 1 microsecond 1 microsecond
  100ns Resolution
  BCD Time
  Unix/Binary Time  
  1, 5, 10 MPPS output
  Programmable Rate Generation Outputs/Interrupts 0.0000001 PPS
to 10 MPPS		 0.0000001 PPS
to 10 MPPS		 <1 PPS to 250 KPPS 1 PPS to 1 MPPS
  Event Time Capture/Interrupts 3x Event Captures 1x Event Captures 1x Event Captures 1x Event Captures
  Time Compare (Alarm) Output/Interrupts
  Real Time Clock (In the event of a power failure.) Battery backed Battery backed Battery backed 3 day limit
  Flywheeling/Holdover
  OCXO for Extended Flywheel Accuracy;
  10 MHz sine out		 optional optional optional  
  External Freq. Input – Disciplining Local Oscillator 1 PPS, 10 MHz 1 PPS, 10 MHz 1 PPS, 10 MHz 1 PPS
  External Freq. Input – Cesium/Rubidium Direct 10 MHz 10 MHz 10 MHz  
  PCI Express, low profile card size, standard and low profile cover plates      
  Standard half size card (4.2" x 6.875")  
  3.3V and 5.0V Universal Signaling on PCI Local Bus; PCI-X Compatible  
Software and Drivers        
  Windows
  Solaris  
  Linux  

(1) The bc637PCI-V2 is the replacement for the discontinued bc637PCI-U.

(2) No IEEE 1344 support.

(3) Accuracy is a function of the input reference. Time codes are generally 1-5 microseconds, GPS is 170 nanoseconds to 1 microsecond depending on model. See datasheets for full details.