LMH0070 Datasheet | National Semiconductor

Description The LMH0040 family of products provide a very simple 5:1 serializer and transmitter function, intended to be paired with an FPGA host which will format the data appropriately such that the output of the LMH0040 will be pliant with the output requirements of DVB-ASI, SMPTE 259M, and SMPTE 292M. The LMH0340 adds support for SMPTE 424M, the LMH0070 supports 270 Mbps operation only, and the LMH0050 requires an external cable driver. Throughout this document, if not explicitly stated, when the LMH0040 is referred to this includes all members of the family. The interface between the LMH0040 and the FPGA consists of a 5 bit wide LVDS bus, an LVDS clock and an SMBus interface. The product is packaged in a physically small 48 pin LLP package. Key Specifications - Output pliant with SMPTE 424M, SMPTE 292M, SMPTE 259M-C and DVB-ASI - Typical power dissipation: 420 m W - Typical output jitter <53 ps (HD, 3G) Features - - - - - LVDS Interface No external VCO or clock required Integrated Variable output Cable Driver 3.3V SMBus configuration interface 48pin LLP package Applications - SDI interfaces for: - - - - Video Cameras DVRs Video Switchers Video Editing Systems Block Diagram © 2007 National Semiconductor Corporation .national. LMH0040 TABLE 1. Feature Table Device LMH0340 LMH0040 LMH0070 LMH0050 X SMPTE 424M Support X SMPTE 292M Support X X SMPTE 259M Support X X X X DVB-ASI Support SMPTE pliant cable driver X X X X X X X Device Operation The LMH0040 serializer is used in digital video signal origination equipment. It is intended to be operated in conjunction with an FPGA host which preprocesses data for it, and then provides this data over the five bit wide datapath. Provided the host has properly formatted the data for the LMH0040, the output of the device will be pliant with DVB-ASI, SMPTE 259M-C, SMPTE 292M or SMPTE 424M depending upon the output mode selected. high, then the four bit nibbles from TX0- TX3 are taken to form an 8...