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参数资料
| 型号： | LC74798 |
| 元件分类： | 画面叠加 |
| 英文描述： | ON-SCREEN DISPLAY IC, PDIP30 |
| 封装： | 0.400 INCH, SDIP-30 |
| 文件页数： | 27/32页 |
| 文件大小： | 322K |
| 代理商： | LC74798 |
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No. 5833-4/32
LC74798, 74798M
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
VDD max
VDD1 and VDD2VSS – 0.3 to VSS + 7.0
V
Maximum input voltage
VIN
All input pins
VSS – 0.3 to VDD + 0.3
V
Maximum output voltage
VOUT
DOUT, SEPOUT, SYNCJDG
VSS – 0.3 to VDD + 0.3
V
Allowable power dissipation
Pd max
Ta = 25°C
350
mW
Operating temperature
Topr
–30 to +70
°C
Storage temperature
Tstg
–40 to +125
°C
Specifications
Absolute Maximum Ratings
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Supply voltage
VDD1VDD1 and VDD24.5
5.0
5.5
V
VDD2VDD24.5
5.0
1.27 VDD1V
Input high-level voltage
VIH1
RST, CS1, CS2, SIN1, SCLK1, SCLK2, MUTE
0.8 VDD1VDD1 + 0.3
V
VIH2CTRL1
0.7 VDD1VDD1 + 0.3
V
Input low-level voltage
VIL1
RST, CS1, CS2, SIN1, SCLK1, SCLK2, MUTE
VSS – 0.3
0.2 VDD1V
VIL2CTRL1
VSS – 0.3
0.3 VDD1V
Pull-up resistance
RPU
RST, CS1, CS2, SIN1, SCLK1, SCLK2, MUTE
25
50
90
k
Applies to pins set up by options.
Composite video signal input
VIN1CVIN and CVCR: VDD1 = 5 V
2.0
Vp-p
voltage
VIN2
SYNIN : VDD1 = 5 V
1.5
2.0
2.5
Vp-p
Input voltage
VIN3
XtalIN (when used for external clock input)
0.10
5.0
Vp-p
fIN = 2fsc or 4fsc: VDD1 = 5 V
Oscillator frequencies
FOSC1
XtalIN and XtalOUT oscillator pins (2fsc : PAL)
8.867
MHz
XtalIN and XtalOUT oscillator pins (4fsc : PAL)
17.734
MHz
Allowable Operating Ranges
Note: Applications must be especially cautious about noise when using the XtalIN input pin in clock input mode.
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Input off leakage current
Ileak1CVIN and CVCR
1A
Output off leakage current
Ileak2CVOUT
1A
Output high-level voltage
VOH1
DOUT, SEPOUT, CPOUT, and SYNCJDG
3.5
V
VDD1 = 4.5 V, IOH = –1.0 mA
Output low-level voltage
VOL1
DOUT, SEPOUT, CPOUT, and SYNCJDG
1.0
V
VDD1 = 4.5 V, IOL = –1.0 mA
H3.3
5.0
V
Three-value output voltage
VO
CHABLK: VDD1 = 5.0 V
M
1.8
2.3
V
L0
0.8
V
IIH
RST, CS1, CS2, SIN, SCLK1, SCLK2, CTRL1, MUTE,
1A
Input current
SEPIN, VCOIN, and VCOIN2, VIN = VDD1
IIL
CTRL1, SEPIN, VCOIN, and VCOIN2, VIN = VSS1–1
A
IDD1
VDD1: With all outputs open
40
mA
Operating mode current drain
Xtal : 17.734 MHz, VCO : 27 MHz
IDD2VDD2 : VDD2 = 5 V
20
mA
CVOUT :VDD1 = 5.0 V,
(1)
0.80
V
SYNC level
VSN
VDD2 = 5.0 V
(2)
1.00
V
(3)
1.40
V
CVOUT :VDD1 = 5.0 V,
(1)
1.37
V
Pedestal level
VPD
VDD2 = 5.0 V
(2)
1.57
V
(3)
1.97
V
CVOUT :VDD1 = 5.0 V,
(1)
1.07
V
Color burst low level
VCBL
VDD2 = 5.0 V
(2)
1.27
V
(3)
1.67
V
CVOUT :VDD1 = 5.0 V,
(1)
1.67
V
Color burst high level
VCBH
VDD2 = 5.0 V
(2)
1.87
V
(3)
2.27
V
Electrical Characteristics at Ta = –30 to +70°C, VDD1 = 5 V unless otherwise specified.
Continued on next page.
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