The CAB4 is 32-bit 1:2 Command/Address/Control Buffer and 1:4 differential Clock Buffer
designed for operation on DDR4 registered DIMMs with a 1.2 V VDD mode.
All inputs are pseudo-differential using external or internal voltage reference. All
outputs are full swing CMOS drivers optimized to drive 15 to 50 Ω effective terminated traces in
DDR4 RDIMM, LRDIMM and 3D-Stacked DIMM applications. The clock outputs, command/address outputs,
control outputs, data buffer control outputs can be enabled in groups, and independently driven
with different strengths to compensate for different DIMM net topologies. The DDR4 Register
operates from a differential clock (CK_t and CK_c). Inputs are registered at the crossing of CK_t
going HIGH, and CK_c going LOW. The input signals could be either re-driven to the outputs if one
of the input signals DCS[n:0]_n is driven LOW or it could be used to access device internal control
registers when certain input conditions are met.
The device is characterized in the operating temperature range from 40°C to
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