LC89950 Datasheet (Sanyo)

LC89950, 1H Delay Line

Ordering number : EN 5440 MOS LSI LC89950 1H Delay Line for PAL Systems Preliminary Overview The LC89950 is an IC that provides 1H delay processing for color difference signals used in PAL and SECAM format TV.

The LC89950 has two CCD systems, one for the R-Y and one for the B-Y signal, and drives these CCDs with a 4-MHz clock generated within the IC.

It uses a sandcastle-shaped three-value input clock with a 1 H (64 µs) period.

Auto-bias and input clamping circuits 4-MH

LC89950 Features

* 5-V single-voltage power supply

* Two input and output systems, one each for R-Y and BY signals

* Takes a sandcastle pulse (SCP) as the input clock, and converts that to a burst gate pulse (BGP) signal internally.

* Generates the CCD drive pulses (4 MHz) from the in