FMC DIO 5CH TTL A

The FMC DIO 5CH TTL A is a simple board for digital I/O on LEMO connectors.

The FMC DIO 5CH TTL A has been designed for testing of the White Rabbit functionality as part of the SPEC Demonstration Package for White Rabbit, and it can be used for other general-purpose applications.

Specifications

• 5 input/output ports with independently programmable direction (Lemo 00 connectors).
• Output levels: LVTTL, capable of driving +2.5 V over a 50-Ohm load. At power-up the outputs are in Hi-Z state.
• Input levels: any logic standard from Vih = 1 V to Vih = 5 V (threshold programmable for each input independently).
• Output rise/fall times: max. 2 ns.
• I/O bandwidth: 200 MHz.
• Programmable 50-Ohm input termination in each channel.
• LVDS I/O on the carrier side.
• One of the inputs is capable of driving a global clock net in the carrier’s FPGA.
• Inputs and outputs protected against +15V pulses with a pulse width of up to 10µs at 50Hz.
• 4-layer PCB

This module has been designed to be used together with the Simple PCIe FMC Carrier – SPEC, forming a simple White Rabbit node for building ultra-precise time and event distribution networks.

More technical information: https://www.ohwr.org/projects/fmc-dio-5chttla/wiki

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