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PDF LC74731W Data sheet ( Hoja de datos )
| Número de pieza | LC74731W | |
| Descripción | On-Screen Display Controller | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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LC74731W
LC74732W
CMOS LSI
On-Screen Display Controller
www.onsemi.com
Overview
The LC74731W and LC74732W are on-screen display CMOS ICs that
display characters and patterns on a TV screen under the control of a
microcontroller. These ICs display 16 16-dot characters and up to 12 lines
of text with 24 characters per line.
Features
SPQFP64 10x10 / SQFP64
Text structure : 12 lines 24 characters (Up to 288 characters)
Character format : 16 16 dots
Character display clock frequency : about 9 MHz
Character sizes : Four sizes each in the horizontal and vertical directions with the size set in line units.
Number of characters supported :
LC74731W : 256 (internal)
LC74732W : 512 (internal)
Up to 8192 using an external ROM (for Japanese)
[Reference] JIS X0298 (1990) : 6877 characters
JIS level 1 kanji : 2965 characters
JIS level 2 kanji : 3388 characters
Special characters : 524 characters
Display start positions : 128 positions each in the horizontal and vertical directions
Blinking, reverse video, reversed blinking, and character outlining : May be specified in individual character units.
Blinking types : Two types with periods of about 1.0 and about 0.5 seconds.
Blanking : The whole font area (16 16 dots) can be blanked in line units
(Four types : no blanking, character size blanking, character plus outlining size blanking, and whole area up to
adjacent character blanking)
Line spacing control : Zero to seven scan lines, in line units
Character color : Eight colors in character units (in internal synchronization mode) : 2 fsc and 4 fsc
(Black, red, green, yellow, blue, magenta, cyan, and white)
Character background color : Eight colors (in internal synchronization mode) : 2 fsc and 4 fsc
(Black, red, green, yellow, blue, magenta, cyan, and transparent)
Screen background color : Eight colors (in internal synchronization mode) : 2 fsc and 4 fsc
(Black, red, green, yellow, blue, magenta, cyan, and white)
External control inputs : Serial interface with an 8-bit data size.
Built-in sync separator circuit
Video outputs : NTSC, PAL, PALM, PALN, NTSC 4.43, and PAL 60 composite video signal outputs
Supports Y/C input
ORDERING INFORMATION
See detailed ordering and shipping information on page 39 of this data sheet.
© Semiconductor Components Industries, LLC, 2015
March 2015 - Rev. 1
1
Publication Order Number :
LC74731W_32W/D
1 page  
LC74731W, LC74732W
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
min max
Unit
Supply voltage
Input voltage
Output voltage
VDD
VIN
VOUT
VDD1 and VDD2
All input pins
SYNCJDG, BLANK, CHARA, SEPOUT, A0 to A17,
CE, and OE
VSS – 0.3
VSS – 0.3
VSS – 0.3
VSS + 6.5
VDD1 + 0.3
VDD1 + 0.3
V
V
V
Allowable power dissipation
Pdmax
— 275 mW
Operating temperature
Topr
–30 +70 °C
Storage temperature
Tstg
–40
+125
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed,
damage may occur and reliability may be affected.
Recommended Operating Conditions
Parameter
Supply voltage
Supply voltage
[Only for RGB output]
High-level input voltage
Low-level input voltage
Pull-up resistor
Composite video signal input
voltage
Input voltage
Oscillator frequency
Symbol
Conditions
VDD1
VDD2
VDD1
VDD2
VIH1
VIH2
VIH3
VIH4
VIL1
VIL2
VIL3
RPU
VIN1
VIN2
VIN3
FOSC1
FOSC2
VDD1
VDD2
VDD1
VDD2
CS, SIN, SCLK, SEPIN, and MUTE
RST
CTRL1 and OUTMOD
D0 to D7
RST, CS, SIN, SCLK, SEPIN, and MUTE
CTRL1 and OUTMOD
D0 to D7
RST, CS, SIN, SCLK, and MUTE (when the pull-up
resistor option is specified)
CVIN and CVCR
SYNIN
XtalIN (when an external clock input is used)
fin = 2 fsc, 4 fsc
VDD1 = 5 V
VDD1 = 5 V
VDD1 = 5 V
The XtalIN and XtalOUT oscillator pins (2 fsc: NTSC)
The XtalIN and XtalOUT oscillator pins (4 fsc: NTSC)
The XtalIN and XtalOUT oscillator pins (2 fsc: PAL)
The XtalIN and XtalOUT oscillator pins (4 fsc: PAL)
The OSCin and OSCout oscillator pins (LC oscillator)
min
4.5
4.5
2.7
2.7
0.8 VDD1
0.8 VDD1
0.7 VDD1
0.8 VDD1
VSS – 0.3
VSS – 0.3
VSS – 0.3
Ratings
typ
5.0
5.0
5.0
5.0
—
—
—
—
—
—
—
max
5.5
6.5
5.5
6.5
5.5
VDD1 + 0.3
VDD1 + 0.3
5.5
0.2 VDD1
0.3 VDD1
0.2 VDD1
Unit
V
V
V
V
V
V
V
V
V
V
V
25 50 90 kΩ
— 2.0
— Vp-p
1.5 2.0 2.5 Vp-p
— — 5.0 Vp-p
7.159
14.318
— 8.867
— 17.734
— 10
MHz
MHz
— MHz
— MHz
— MHz
Note: If the Xtalin pin is used in clock input mode, applications must take adequate input noise prevention and reduction measures.
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended
Operating Ranges limits may affect device reliability.
5/39
5 Page 
LC74731W, LC74732W
COMMAND0 (Display memory write address setup command)
• First byte
DA0 to 7
7
6
5
4
3
Register
—
—
—
—
V3
2 V2
1 V1
0 V0
State
1
0
0
0
0
1
0
1
0
1
0
1
Content
Function
Command 0 identification code
Display memory write address setup
Display memory line address (0 to B (hexadecimal))
• Second byte
DA0 to 7 Register
State
Content
Function
7 — 0 Second byte identification code
6 —0
5 —0
0 Display memory line address (0 to 17 (hexadecimal))
4 H4
1
0
3 H3
1
0
2 H2
1
0
1 H1
1
0
0 H0
1
Note that all registers are set to 0 when these ICs are reset by the RST pin.
Notes
Notes
11/39
11 Page | ||
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| PDF Descargar | [ Datasheet LC74731W.PDF ] | |
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