Part Number: MLVD20XBEVM
Other Parts Discussed in Thread: SN65MLVD203
I'm wondering if it is possible to interface a type 1 MLVDS with a Type 2. In particular, I'm looking to use this dev board from TI attached below to pass CMOS through the SN65MLV204AD to LVDS lines into the SN65MLVD203 to push back into CMOS at the output, is this possible?
That is the dev board in question
Thanks!
there is little difference for receiver threshold between type-1and type-2, which could cause logic error.
Hi,
M-LVDS Type-1 and Type-2 are only defined for the RX. As Brian pointed out in his response, the threshold of Type-1 receivers is centered on 0V (-50mV to 50mV), while the threshold of Type-2 receivers is centered on 100mV (50mV to 150mV).
Figure 2: Differential input voltage thresholds for Type-1 and Type-2 receivers
Type-1 receivers can support higher M-LVDS data rates when compared to Type-2 receivers, due to higher noise margins. Use Type-1 receivers for applications that require higher data rates or clock frequencies.
Use Type-2 receivers when you need to support fail-safe operation. The output of a Type-2 receiver is a known logic low state when the bus is not driven (0V differential voltage). Also, use Type-2 receivers when you need to support Wired-OR logic, where outputs from multiple drivers are tied together. In this case, the input signal is fed to the enable (EN) input of the drivers, while the data input (D) of all drivers are tied high.
Thanks
David
