The Microchip/TrueTime PCI-SG 2U is a multi-function PCI plug-in module that delivers precise time and frequency synchronization to host computer systems. Operating over the PCI bus, It has accurate time stamping, frequency generation, and external source synchronization via IRIG A/B time codes or 1 PPS signals. Designed for applications demanding high-accuracy timing across telecommunications, data acquisition, and industrial automation sectors.
Technical Specifications
PCI Interface
• 32-bit PCI Local Bus Specification Revision 2.2, compatible with 2.3
• Dual voltage operation: 3.3 V and 5.0 V with automatic detection
• 33 MHz bus clock Synchronization Inputs
• Internal oscillator with external disciplining capability
• IRIG A/B analog input: 0.5 to 10 Vpp, 2:1 to 5:1 ratio, selectable impedance (50 Ω, 600 Ω, 10 kΩ), BNC connector, 3 microsecond timing accuracy
• IRIG A/B RS-422 input: 9-pin D-subminiature or BNC, 1 microsecond timing accuracy, three-frame error bypass (factory set)
• 1 PPS external input: 1 microsecond timing accuracy (note: disables external event capture when active) Time and Frequency Outputs
• 1 PPS output
• Programmable frequency synthesizer: 1 PPS to 1 MPPS, includes 1, 5, and 10 MPPS rate options
• IRIG-B122 code: BNC connector (J1), 3 Vp-p output into 600 Ω, 3:1 ratio
• IRIG-B002 code: RS-422 level output on D9 connector (pin 8 positive, pin 9 negative)
• Time-compare register with selectable interrupt or BNC output capability
• Rate synthesizer output/interrupt on D9 pin 6 Event Capture
• External event time-capture functionality via rear panel multipin connector – Key Features • Standalone generator mode with external synchronization discipline
• Multiple input/output format support (analog, RS-422, IRIG-B, 1 PPS)
• Programmable interrupts and rate synthesis
• Flexible connector options (BNC, D9) – Typical Applications Telecommunications networks, precision data acquisition systems, synchronized industrial process control, and timing-critical laboratory instrumentation. – Compatibility & Integration Standard PCI slot insertion; transparent operation with 32-bit and 64-bit PCI host systems through backward compatibility. Automatic voltage adaptation ensures operation in mixed 3.3 V/5.0 V environments.
