LC74721 查看數據表（PDF） - SANYO -> Panasonic
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LC74721 Datasheet PDF : 12 Pages
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LC74721, 74721M
Pin Functions
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Name
VSS1
XIN
XOUT
CTRL1
CSYNOUT
OSCIN
OSCOUT
SYNC
CS
SCLK
SIN
VDD2
CVOUT
NC
CVIN
VDD1
SYNCIN
SEPC
SEPOUT
SEPIN
CTRL2
CTRL3
RST
VDD1
Ground
Description
Internal sync signal crystal oscillator capacitor connections or external clock input (2fSC or 4fSC)
Clock input mode select. HIGH for external clock input mode, and LOW for crystal oscillator
mode.
Composite synchronization signal output. During reset (RST LOW), crystal oscillator clock is
output. No output for internal reset command
LC oscillator input. LC circuit for pixel clock generation character output
LC oscillator output. LC circuit for pixel clock generation character output
External synchronization signal check output. During reset (RST LOW), pixel clock is output. No
output for internal reset command
Serial data input enable when LOW, with pull-up resistance
Clock input for serial data input, with pull-up resistance
Serial data input, with pull-up resistance
Power supply for composite video image signal level modulation (for analog system)
Composite video image signal output
No connection
Composite video image signal input
5V power supply for digital system
Synchronization separation circuit input. If internal sync separation circuit is not used, use
SYNCIN to input an external horizontal or composite synchronization signal
Synchronization separation circuit modulator capacitor connection. Leave open if not used
Composite synchronization separation circuit output. Outputs SYNCIN signal if internal sync
separation is not used.
Vertical synchronization signal input. Tie to VDD1 if not used
NTSC/PAL-M sync signal generation method select input. LOW for NTSC
SEPIN input control. VSYNC input signal when LOW
System reset input, with pull-up resistance
5V power supply for digital system
Specifications
Absolute Maximum Ratings
Parameter
Supply voltage
Input voltage
Output voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VDD1,
VDD2
VI
VO
PD
Topr
Tstg
Ta = 25˚C
Conditions
Ratings
Unit
VSS– 0.3 to VSS+7.0 V
VSS– 0.3 to VDD+0.3 V
VSS– 0.3 to VDD+0.3 V
350 mW
– 30 to +70 ˚C
– 40 to +125 ˚C
Reommended Operating Conditions at Ta = 25˚C
Parameter
Symbol
Logic supply voltage
Analog supply voltage
Logic supply voltage range
Analog supply voltage range
VDD1
VDD2
VDD1
VDD2
Conditions
Ratings
Unit
5.0 V
5.0 V
4.5 to 5.5 V
4.5 to (1.27VDD1) V
Pin Assignment
No.4359–3/12
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