The Microchip/TrueTime PCI-SG is a multi-function time and frequency PCI plug-in module that delivers precise synchronization and time distribution to computer systems via 32-bit PCI bus. It accepts IRIG A/B time codes, external 1 PPS signals, or 10 MHz inputs, and disciplines an internal TCXO oscillator to these references. In standalone mode, the module operates as a frequency generator using its onboard oscillator. The PCI-SG captures time stamps, events, and status information with 100 ns clock resolution, supporting zero-latency time reads across the PCI interface.
Technical Specifications
Synchronization & Time Sources
• IRIG A and IRIG B time code inputs
• External 1 PPS (Pulse Per Second) synchronization
• 10 MHz frequency input
• Internal disciplined Temperature-Compensated Crystal Oscillator (TCXO) at 10 MHz
• Standalone generator mode with internal oscillator
Time Accuracy & Resolution
• 100 ns clock resolution
• Time acquisition from nanoseconds to thousands of years
• Zero-latency time reads across PCI bus
Output Signals
• 1 PPS pulse output
• Programmable frequency pulse rate output
• Programmable rate synthesizer: 1 PPS to 1 MPPS
• Rate generator: 1 MPPS to 10 MPPS
• IRIG-B122 on BNC connector (3 Vp-p into 600 ohms, 3:1 ratio)
• IRIG-B002 RS-422 level on D9 connector (pins 8 and 9)
• Programmable time-compare output with interrupt capability
Input Capabilities
• External event capture with time stamping
• Time-compare input with interrupt capability
• Configurable analog input with selectable impedance
– Key Features
• Delivers time information and event data over 32-bit PCI bus
• Disciplined oscillator maintains frequency accuracy relative to external references
• Multiple synchronization options enable deployment in varied network and timing architectures
• Programmable rate outputs from 1 PPS to 10 MPPS support diverse signal distribution requirements
• High-resolution time capture and interrupt-driven event handling
– Typical Applications
• Data acquisition systems requiring synchronized timing
• Industrial automation and process control
• Communication networks and telecommunications infrastructure
• Laboratory and test systems demanding precision frequency generation
– Compatibility & Integration
32-bit PCI bus interface. IRIG time code, 1 PPS, and 10 MHz reference inputs enable integration with GPS receivers, atomic clocks, and other precision timing sources.
