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BA7078AS

Rohm
Part Number BA7078AS
Manufacturer Rohm
Description Synchronization signal processor for high definition displays
Published Apr 1, 2005
Detailed Description BA7078AF/AS Multimedia ICs Synchronization signal processor for high definition displays BA7078AF/AS The BA7078AF is a ...
Datasheet PDF File BA7078AS PDF File

BA7078AS
BA7078AS


Overview
BA7078AF/AS Multimedia ICs Synchronization signal processor for high definition displays BA7078AF/AS The BA7078AF is a synchronization signal processing LSI chip designed for multiscan high-definition displays.
It generates a synchronization signal and clamp pulse for three types of input signals: separate synchronization, composite synchronization, and synchronization on video.
!Application CRT displays !Features 1) Operates on a single 5V power supply, with low power consumption.
2) Synchronization signal existence and polarity detec-tion output.
3) Adjustable clamp pulse width, allowing for the selec-tion of front or back editing.
4) Vertical synchronization separation is based on hori-zontal frequency tracking, for separation starting at 1H.
5) Minimal attached components.
!Absolute maximum ratings (Ta = 25°C) Parameter Power supply voltage Power dissipation Operating temperature Symbol VCC ∗1 Limits 7.
0 450(BA7078AF) 600(BA7078AS) −25 to +75 ∗2 Unit V mW °C °C Pd Topr −55 to +125 Tstg Storage temperature ∗1 Reduced by 4.
5mW for each increase in Ta of 1°C over 25°C.
∗2 Reduced by 6.
0mW for each increase in Ta of 1°C over 25°C.
!Recommended operating conditions (Ta = 25°C) Parameter Power supply voltage Symbol VCC Min.
4.
5 Typ.
5.
0 Max.
5.
5 Unit V 1/12 BA7078AF/AS Multimedia ICs !Block diagram HSCTL 1 18 POLH C / HSYNC IN 2 H SYNC DET.
17 EXIH VIDEO IN 3 SYNC SEPA.
16 POLV VSEPA 4 HOR.
SYNC CONTROL V SYNC SEPA.
15 EXIV VSYNC IN 5 14 Vcc CVPOL 6 V SYNC DET.
13 HDRV CVEXI 7 12 CLAMP CPSEL 8 CLAMP PULSE GEN.
11 VDRV GND 9 10 CPWID 2/12 BA7078AF/AS Multimedia ICs !Pin descriptions Pin No.
Pin name Functions Used to select whether to output the VDRV section of the HDRV output signal.
High : VDRV section of HDRV is output Low : VDRV section of HDRV is not output Input either the composite synchronization signal or the horizontal synchronization signal.
Input is clamped, and is initiated by capacitor coupling.
Inputs ...


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