Inphi Corporation has released a high speed1:8 demultiplexer with latched comparator input operating at bit rates from DC to 12.5 Gbps.  A member of its high speed logic family, the 1385DX, with its high sensitivity latched comparator input and auto-synchronizing demultiplexer, enables test and measurement, defense, and aerospace designers to develop high speed data acquisition front ends and to deserialize high speed signals.

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The 1385DX features a high-speed sampling clock and high-bandwidth latched comparator input that can be used to sample high-bandwidth analog signals and demultiplex them to a lower data rate for post-processing via a low speed FPGA or ASIC.  Additionally, the high bandwidth input supports digital signals up to 12.5 Gbps, which are latched and deserialized to an 8-bit parallel output bus.  The 1:8 deserialization, coupled with an on-chip synchronization circuit and adjustable output levels, allow the use of multiple demultiplexers in parallel, with automatic alignment of the parallel output buses of the demultiplexers.

 The 1385DX accepts a single external clock at up to 12.5 GHz that samples the input signal from the high-bandwidth comparator.  Internally generated clocks are used for demultiplexing the latched input signal to an 8-bit parallel data bus.  The device outputs a full-rate clock (⅛ of the input clock) or half-rate clock (1/16 of the input clock) as determined by the CLKSEL input.

The demultiplexer’s built-in synchronization circuit allows two or more 1385DXs to be automatically synchronized using a master/slave mode, in which the slave demux synchronizes to a signal (CK16) from the master, or a slave/slave mode, in which both 1385DX’s are synchronized to an external master clock (1/16 of the input clock frequency).  Synchronization occurs within at most 152 periods of the input clock.

The 12.5 Gbps 1:8 demultiplexer with latched comparator input operates from a standard +3.3 V power supply.  Currently, it is shipping in pre-production quantities in an 8 x 8 mm QFN package or on an evaluation board with SMA connectors. Full production is expected to begin this quarter.

Key features and benefits: 

www.Inphi-Corp.com/product-overview/ghz-logic.php