LF48212

` 50 MHz Data and Computation Rate
` Two's Complement or Unsigned Operands
` On-board Programmable Delay Stages
` Programmable Output Rounding
` Replaces Harris HSP48212
` Package Styles Available:
    • 68-pin PLCC, J-Lead
    • 64-pin PQFP

Storage temperature .......................................................65 to +150
Operating ambient temperature .......................................55 to +125
VCC supply voltage with respect to ground ..................... 0.5 V to +7.0 V
Input signal with respect to ground ........................ 0.5 V to VCC + 0.5 V
Signal applied to high impedance output ................ 0.5 V to VCC + 0.5 V
Output current into low outputs .........................................................25 mA
Latchup current ............................................................................. > 400 mA

The LF48212 is a high-speed video alpha mixer capable of mixing video signals at real-time video rates. LF48212 takes two 12-bit video signals and mixes them together using an alpha mix factor. Alpha determines the weighting that each video signal receives during the mix operation.

The input video data can be in either unsigned or two's complement format, but both inputs must be in thesame format. Independently controlled programmable delay stages are provided for the input and control signals to allow for allignment of input data if necessary. The delay stages can be programmed to have from 0 to 7 delays. The 13-bit output of the alpha mixer is registered with three-state drivers and may be rounded to 8, 10, 12, or 13-bits.