參數(shù)資料
型號(hào)： LC74760
廠商： Sanyo Electric Co.,Ltd.
英文描述： On-Screen Display IC
中文描述： 屏幕顯示芯片
文件頁(yè)數(shù)： 3/14頁(yè)
文件大小： 178K
代理商： LC74760
Pin Functions
Pin No.
Symbol
Function
Description
1
V
SS
Xtal
IN1
Xtal
OUT1
Ground
Ground connection
2
Crystal oscillator connection
Connection for the crystal and capacitor used to form the crystal oscillator that generates
the internal synchronization signal. (For an NTSC crystal oscillator 4fsc = 14.318 MHz.)
3
4
HSYNC
OUT
Horizontal synchronization
output
Outputs the horizontal synchronization signal (AFC). The polarity can be selected with a
metal switch.
5
Xtal
IN2
Xtal
OUT2
VSYNC
OUT
Crystal oscillator connection
Connection for the crystal and capacitor used to form the crystal oscillator that generates
the internal synchronization signal. (For a PAL crystal oscillator 4fsc = 17.734 MHz.)
6
7
Vertical synchronization output
Outputs the vertical synchronization signal. The polarity can be selected with a metal switch.
8
CS
Enable input
Enables/disables serial data input. Serial data is enabled when this pin is low. Pull-up
resistor built in (hysteresis input).
9
SIN
Data input
Serial data input. Pull-up resistor built in (hysteresis input).
10
SCLK
Clock input
Clock input for serial data input. Pull-up resistor built in (hysteresis input).
11
SECAM
SECAM mode switch input
Switches between SECAM and other modes.
Low = other modes, high = SECAM mode
12
525/625
525/625 switch input
Switches between 525 scan lines and 625 scan lines.
Low = 525 lines, high = 625 lines
13
NTSC/PAL
NTSC/PAL switch input
Switches the color mode between NTSC and PAL.
Low = NTSC, high = PAL
14
3.58/4.43
3.58/4.43 switch input
Switch FSC between 3.58 MHz and 4.43 MHz.
Low = 3.58, high = 4.43
15
RST
Reset input
System reset input pin, low is active (reset).
Pull-up resistor built in (hysteresis input).
16
CV
OUT
V
DD2
CV
IN
CV
CR
SYNC
IN
SEP
C
V
SS
PD
OUT
AMP
IN
AMP
OUT
FC
Video signal output
Composite video output
17
Power supply connection
Power supply connection for composite video signal level generation
18
Video signal input
Composite video input
19
Video signal input
SECAM chroma signal input
20
Sync separator circuit input
Built-in sync separator circuit video signal input
21
Sync separator circuit
Built-in sync separator circuit (AMP out)
22
Ground
Ground connection
23
Control voltage output
AFC control voltage output
24
AFC filter connection
Filter connection
25
26
Control voltage input
AFC control voltage input
27
VCO
IN
VCO
OUT
LC oscillator connection
VCO LC oscillator circuit coil and capacitor connection
28
29
SYNC
DET
External synchronization signal
detection output
Outputs the exclusive NOR of the horizontal synchronization signal (AFC) and CSYNC (sync
separator).
30
V
DD1
Power supply connection
Power supply connection (+5 V: digital system power supply)
No. 4453-3/14
LC74760, 74760M
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