MTC 1233 Features
-16 to 1 Multiplexer (MUX) with integrated Clock Multiplier Unit (CMU)
-Low power, single -3.6V power supply
-Optimized for ULH and LH applications
-Low jitter VCO with external loop filterSecond
-Supports RZ transmission - full and 1/2 rate clock outputs skew matched to data output
-PFD supports forward and counter clocked systems

MTC 1234 Features
-1 to 16 Demultiplexer (DMUX) with integrated Clock and Data Recovery (CDR)
-High data input sensitivity; 10 mV pp
-Optimized for ULH and LH applications
-Low jitter VCO with external integrator
-Direct recovery of RZ format data signals
-True Loss of Signal (LOS) indication
-Low power, single -3.6V power supply
-Single crystal supports 9.953 and 10.664 Gb/s

Both boards come together with about 35 connector wires