NI 654x

The NI 654x is a 32-channel digital I/O device that you can use as a PC/peripheral device interface, pattern generator, pattern analyzer, or stimulus-response tester. The NI 6541 has a maximum Sample clock frequency of 50 MHz, and the NI 6542 has a maximum Sample clock frequency of 100 MHz.

The NI 654x also provides the following features:

• Sophisticated timing engine to maintain and measure the timing parameters of the DUT
• Selectable voltage levels for interfacing to devices from different logic families
• Data channels with per channel direction control
• Deep onboard memory with triggering and pattern sequencing capabilities
• Ability to use NI-TClk to synchronize multiple devices

You can use the internal On Board Clock or import an external clock through the front panel. You can also shift the generated data, acquired data, and exported Sample clock relative to the onboard clock for clock frequencies above 25 MHz, which is critical when accounting for propagation delays and setup-and-hold times in the DUT.

Expand this book for more information about NI 654x hardware-related topics.