參數(shù)資料
型號: LC74785M
元件分類: 畫面疊加
英文描述: ON-SCREEN DISPLAY IC, PDSO24
封裝: 0.375 INCH, PLASTIC, SOP-24
文件頁數(shù): 20/24頁
文件大小: 266K
代理商: LC74785M
No. 5520-5/24
LC74785, LC74785M
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Minimum input pulse width
tW(SCLK)
SCLK
200
ns
tW(CS1)
CS1 (The period when CS1 is high)
1
s
Data setup time
tSU(CS1)
CS1
200
ns
tSU(SIN)
SIN
200
ns
Data hold time
th(CS1)
CS1
2
s
th(SIN)
SIN
200
ns
One word write time
tword
The time to write 8 bits of data
4.2
s
twt
The RAM data write time
1
s
Timing Characteristics at Ta = –30 to +70°C, VDD1 = 5 ±0.5 V
OSD write (See Figure 1.)
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
tCKCY
SCLK
2
s
Minimum input pulse width
tCKL
SCLK
1
s
tCKH
SCLK
1
s
Setup time
tICK
SCLK
10
s
Output delay time
tCKO
CPDT
0.5
s
EDS read (For the n-channel open-drain circuit, see Figure 2.)
Figure 1 OSD Serial Data Input Timing
Figure 2 EDS Serial Output Test Conditions (For the n-channel open-drain circuit.)
Note: The CMOS output circuit follows the OSD timing.
First byte
Note: CPDT goes to the high-impedance state when CS2 is high.
Second byte
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