The National Instruments NI-6581 is a high-performance Digital I/O Adapter Module designed for use with FlexRIO architecture. This module facilitates seamless interfacing with 54 single-ended digital pins when paired with a PXI FPGA Module. It is capable of executing continuous interfacing for both standard and custom protocols, making it ideal for various applications. The NI-6581 supports digital test waveforms at speeds up to 100 MHz and accommodates standard transistor-to-transistor logic (TTL) voltage levels. Users can also source alternative voltage references via a dedicated front panel connector.

The NI-6581 is suitable for customized semiconductor and electronics testing, as well as the implementation of widely-used protocols such as SPI and I2C, allowing operation in master or slave configurations. Its digital I/O lines can be configured as custom counters, clocks, pulse width modulation (PWM) channels, or communication buses tailored for specific applications requiring serial triggering. Additionally, the integrated DRAM enhances data storage capabilities, ensuring efficient performance at sampling rates of 100 MHz.

With flexibility in voltage configuration, users can set the NI-6581 to operate at 1.8, 2.5, 3.3, or 5 V TTL logic levels. For enhanced customization, an external voltage source, such as a PXI programmable power supply, can provide independent voltage references ranging from 1.8 to 5.5 V for each connector. The compact module measures 5.1 x 0.8 x 4.7 inches and weighs 10 ounces, ensuring compatibility with diverse setups. The NI-6581 includes a warranty of 2-3 years and comes with user and maintenance manuals available for download. For pricing information, please contact a sales representative.