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參數(shù)資料
| 型號： | LC74723M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | On-Screen Display Controller |
| 中文描述： | 屏幕顯示控制器 |
| 文件頁數(shù)： | 3/12頁 |
| 文件大?。?/td> | 144K |
| 代理商： | LC74723M |
Continued from preceding page.
Note:
*
Both the V
DD
1 pins (pins 16 and 24) must be connected.
Specifications
Absolute Maximum Ratings
at Ta = 25°C
Allowable Operating Ranges
at Ta = –30 to +70°C
Note: When the Xtal
IN
pin is used in clock input mode, be extremely careful of input noise.
Electrical Characteristics
at Ta = –30 to +70°C, V
DD
1 = 5 V unless otherwise specified
No. 4841-3/12
LC74723, 74723M
Pin No.
Symbol
Function
Description
21
CTRL2
NTSC/PAL-M switch input
Switches the synchronization signal generation between NTSC and PAL-M.
Low = NTSC, high = PAL-M
22
CTRL3
SEP
IN
input control
Controls whether the VSYNC signal is input to SEP
IN
.
Low = Input VSYNC, high = do not input.
23
RST
Reset input
System reset input
There is a built-in pull-up resistor on this input (hysteresis input).
24
V
DD
1
Power supply (+5 V)
Power supply (+5 V: digital system power supply)
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
DD
max
V
IN
max
V
OUT
max
Pd max
V
DD
1, V
DD
2
All input pins
V
SS
– 0.3 to V
SS
+ 7.0
V
SS
– 0.3 to V
DD
+ 0.3
V
SS
– 0.3 to V
DD
+ 0.3
V
Maximum input voltage
V
Maximum output voltage
CSYN
OUT
, SYNC
JDG
, SEP
OUT
Ta = 25°C
V
Allowable power dissipation
350
mW
Operating temperature
Topr
–30 to +70
°C
Storage temperature
Tstg
–40 to +125
°C
Parameter
Symbol
Conditions
min
typ
max
Unit
Supply voltage
V
DD
1
V
DD
2
V
IH
1
V
IH
2
V
IL
1
V
IL
2
V
DD
1
V
DD
2
RST, CS, SIN, SCLK
4.5
5.0
5.5
V
4.5
5.0
1.27 V
DD
1
V
DD
1 + 0.3
V
DD
1 + 0.3
0.2 V
DD
1
0.3 V
DD
1
V
Input high level voltage
0.8 V
DD
1
0.7 V
DD
1
V
SS
– 0.3
V
SS
– 0.3
V
CTRL1, CTRL2, CTRL3, SEP
IN
RST, CS, SIN, SCLK
V
Input low level voltage
V
CTRL1, CTRL2, CTRL3, SEP
IN
Applies to the RST, CS, SIN, and SCLK pins and to
the pins specified by options.
V
Pull-up resistance
R
PU
25
50
90
k
Composite video input voltage
V
IN
1
V
IN
2
CV
IN
; V
DD
1 = 5 V
SYN
IN
; V
DD
1 = 5 V
Xtal
IN
(when external clock input is used)
f
in
= 2f
sc
or 4f
sc
; V
DD
1 = 5 V
Xtal
IN
and Xtal
OUT
oscillator pins (2f
sc
: NTSC)
Xtal
IN
and Xtal
OUT
oscillator pins (4f
sc
: NTSC)
Xtal
IN
and Xtal
OUT
oscillator pins (2f
sc
: PAL-M)
Xtal
IN
and Xtal
OUT
oscillator pins (4f
sc
: PAL-M)
OSC
IN
and OSC
OUT
oscillator pins (LC oscillator)
2.0
Vp-p
2.0
2.5
Vp-p
Input voltage
V
IN
3
0.1
5.0
Vp-p
f
osc
1
f
osc
1
f
osc
1
f
osc
1
f
osc
2
7.159
MHz
14.318
MHz
Oscillator frequency
7.151
MHz
14.302
MHz
5
12
MHz
Parameter
Symbol
Conditions
min
typ
max
Unit
Input off leakage current
I
leak
1
I
leak
2
CV
IN
CV
OUT
CSYN
OUT
, SYNC
JDG
, SEP
OUT
;
V
DD
1 = 4.5 V, I
OH
= –1.0 mA
CSYN
OUT
, SYNC
JDG
, SEP
OUT
;
V
DD
1 = 4.5 V, I
OL
= 1.0 mA
RST, CS, SIN, SCLK, CTRL1, CTRL2, CTRL3, SEP
IN
;
V
IN
= V
DD
1
CTRL1, CTRL2, CTRL3, OSC
IN
; V
IN
= V
SS
1
V
DD
1; All outputs open, Xtal: 7.159 MHz, LC: 8 MHz
V
DD
2; V
DD
2 = 5 V
1
μA
Output off leakage current
1
μA
Output high level voltage
V
OH
1
3.5
V
Output low level voltage
V
OL
1
1.0
V
I
IH
1
μA
Input current
I
IL
–1
μA
Current drain (operating)
I
DD
1
I
DD
2
15
mA
20
mA
Continued on next page.
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