參數(shù)資料
型號(hào): LC74785
廠商: Sanyo Electric Co.,Ltd.
英文描述: On-Screen Display Controller LSI(屏幕顯示控制器規(guī)模集成電路(LSI))
中文描述: 屏幕顯示控制器芯片(屏幕顯示控制器規(guī)模集成電路(LSI)的)
文件頁(yè)數(shù): 5/24頁(yè)
文件大小: 268K
代理商: LC74785
No. 5520-5/24
LC74785, LC74785M
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Minimum input pulse width
t
W(SCLK)
t
W(CS1)
t
SU(CS1)
t
SU(SIN)
t
h(CS1)
t
h(SIN)
t
word
t
wt
SCLK
200
ns
CS1 (The period when CS1 is high)
1
μs
Data setup time
CS1
200
ns
SIN
200
ns
Data hold time
CS1
2
μs
SIN
200
ns
One word write time
The time to write 8 bits of data
4.2
μs
The RAM data write time
1
μs
Timing Characteristics
at Ta = –30 to +70°C, V
DD
1 = 5 ±0.5 V
OSD write (See Figure 1.)
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
t
CKCY
t
CKL
t
CKH
t
ICK
t
CKO
SCLK
2
μs
Minimum input pulse width
SCLK
1
μs
SCLK
1
μs
Setup time
SCLK
10
μs
Output delay time
Note: The CMOS output circuit follows the OSD timing.
CPDT
0.5
μs
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.)
First byte
Note: CPDT goes to the high-impedance state when CS2 is high.
Second byte
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