VP536E

NOTE: Stresses exceeding those listed under Absolute Maximum Ratings may induce failure. Exposure to absolute maximum ratings for extended periods may reduce reliability. Functionality at or above these conditions is not implied.

The VP536E converts digital RGB data (3x8bits) into analog NTSC/PAL composite video and S-video signals. The outputs are capable of driving doubly terminated 75 ohm loads with standard video levels.

The VP536E device will also accept YUV data. Progressive scan (non-interlaced fields) video display is available in both NTSC and PAL modes.

The output pixel rate of VP536E is approximately 7 times Fsc (color subcarrier frequency) for NTSC (6.6 times Fsc for PAL) which is approximately 25MHz. Input pixel rate is half this frequency; approximately 12.5MHz.

All the necessary synchronization signals of VP536E are generated internally. Digital horizontal and vertical sync outputs are available for use by the host system.

The rise and fall times of sync, burst envelope and video blanking are internally controlled to be within composite video specifications.Two 8-bit digital to analog converters (DACs) are used to convert the digital luminance and chrominance data into analog signals. An inverted composite video signal is generated by summing the complimentary current outputs of each DAC. An internally generated reference voltage of VP536E provides the biasing for the DACs.