Ordering number : EN4453A
13096HA (OT)/73093JN (OT) No. 4453-1/14
Overview
The LC74760 and LC74760M are on-screen display
CMOS ICs that superimpose text and low-level graphics
onto a TV screen (video signal) under microprocessor
control. The display characters have a 12 by 18 dot
structure, and 128 characters are provided. The display
area consists of 12 lines of 24 characters each.
Features
Display structure: 12 lines by 24 characters (up to 288
characters)
Number of displayed characters: Up to 288 characters
Character configuration: 12 (W) by 18 (H) dot structure
Character sizes: Three sizes (normal, double, and triple
sizes)
Display starting positions: 64 horizontal and 64 vertical
locations
Reverse video function: Characters can be inverted on a
per character basis.
Flashing types: Two types with periods of 0.5 and 1.0
second on a per character basis (duty fixed at 50%)
Background color: One of eight colors (when internal
synchronization used)
External control input: Serial data input in 8-bit units
Built-in horizontal/vertical sync separation circuit, AFC
circuit, and synchronization detector
Video output: Composite video signal output in NTSC,
PAL, PAL-M, PAL-N, PAL60, NTSC4.43, or SECAM
format
Package Dimensions
unit: mm
3061-DIP30S
unit: mm
3073A-MFP30S
SANYO:DIP30S
[LC74760]
SANYO: MFP30S
[LC74760M]
LC74760, 74760M
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN
On-Screen Display IC
CMOS IC
Specifications
Absolute Maximum Ratings
at Ta = 25C
Parameter
Symbol
Condition
Rating
Unit
Maximum supply voltage
V
DD
max
V
DD1
, V
DD2
pins
V
SS
0.3 to V
SS
+ 7.0
V
Maximum input voltage
V
IN
max
All input pins
V
SS
0.3 to V
DD
+ 0.3
V
Maximum output voltage
V
OUT
max
HSYNC
OUT
, VSYNC
OUT
,
V
SS
0.3 to V
DD
+ 0.3
V
SYNC
DET
pins
Allowable power dissipation
Pd max
300
mW
Operating temperature
Topr
30 to +70
C
Storage temperature
Tstg
40 to +125
C
Allowable Operating Ranges
at Ta = 30 to +70C
Rating
Parameter
Symbol
Condition
min
typ
max
Unit
Supply voltage
V
DD1
V
DD1
pin
4.5
5.0
5.5
V
V
DD2
V
DD2
pin
4.5
5.0
1.27 V
DD1
V
Input high level voltage
V
IH1
RST, CS, SIN, SCLK pins
0.8 V
DD1
V
DD1
+ 0.3
V
V
IH2
SECAM, 525/625,
0.7 V
DD1
V
DD1
+ 0.3
V
NTSC/PAL, 3.58/4.43 pins
Input low level voltage
V
IL1
RST, CS, SIN, SCLK
V
SS
0.3
0.2 V
DD1
V
V
IL2
SECAM, 525/625,
V
SS
0.3
0.3 V
DD1
V
NTSC/PAL, 3.58/4.43 pins
Input voltage
V
IN
FC, AMP
IN
pins
V
SS
0.3
V
DD1
+ 0.3
V
V
IN1
CVIN pins
2 V
PP
V
Composite video signal input voltage
V
IN2
CV
CR
pins
2 V
PP
V
V
IN3
SYNC
IN
pins
2 V
PP
2.5 V
PP
V
Oscillator frequency
F
OSC1
Xtal
IN1
, Xtal
OUT1
pins; 4fsc: NTSC
14.318
MHz
Xtal
IN2
, Xtal
OUT2
pins; 4fsc: PAL
17.734
MHz
F
OSC2
Xtal
IN2
, Xtal
OUT2
pins; 4fsc: PAL-M
14.302
MHz
Xtal
IN2
, Xtal
OUT2
pins; 4fsc: PAL-N
14.328
MHz
Electrical Characteristics
at Ta = 30 to +70C, with V
DD1
= V
DD2
= 5 V unless otherwise specified
Rating
Parameter
Symbol
Condition
min
typ
max
Unit
Output off leakage current
I
leak1
CV
OUT
pin
10
A
Input off leakage current
I
leak2
CV
IN
, CV
CR
pins
10
A
Output high level voltage
V
OH
HSYNC
OUT
, VSYNC
OUT
,
3.5
V
SYNC
DET
, SECAM, 525/625,
NTSC/PAL, 3.58/4.43, AMP
OUT
,
PD
OUT
pins; V
DD1
= 4.5 V, I
OH
= 1.0 mA
Output low level voltage
V
OL
HSYNC
OUT
, VSYNC
OUT
,
1.0
V
SYNC
DET
, SECAM, 525/625,
NTSC/PAL, 3.58/4.43, AMP
OUT
,
PD
OUT
pins; V
DD1
= 4.5 V, I
OL
= 1.0 mA
Input current
I
IH
RST, CS, SIN, SCLK, SECAM, 525/625,
1
A
NTSC/PAL, 3.58/4.43 pins; V
IN
= V
DD1
I
IL
SECAM, 525/625, NTSC/PAL,
1
A
3.58/4.43 pin; V
IN
= V
SS1
Oscillator frequency
F
OSC3
VCO
IN
, VCO
OUT
pins; FC = 1/2 V
DD1
14.12
MHz
Operating current dissipation
I
DD1
V
DD1
pin; All outputs open, Xtal: 4fsc
15
mA
I
DD2
V
DD2
pin; V
DD2
= 5.0 V
20
mA
Timing Characteristics
at Ta = 30 to +70C, V
DD
= 5 0.5 V
Rating
Parameter
Symbol
Condition
min
typ
max
Unit
Minimum input pulse width
t
W(SCLK)
SCLK pin
200
ns
t
W(CS)
CS pin (during periods when CS is high)
1
s
Data setup time
t
SU(CS)
CS pin
200
ns
t
SU(SIN)
SIN pin
200
ns
Data hold time
t
h(CS)
CS pin
2
s
t
h(SIN)
SIN pin
200
ns
One word write time
t
word
Write time for 8 bits of data
4.2
s
t
wt
RAM data write time
1
s
No. 4453-2/14
LC74760, 74760M
Pin Functions
Pin No.
Symbol
Function
Description
1
V
SS
Ground
Ground connection
2
Xtal
IN1
Crystal oscillator connection
Connection for the crystal and capacitor used to form the crystal oscillator that generates
3
Xtal
OUT1
the internal synchronization signal. (For an NTSC crystal oscillator 4fsc = 14.318 MHz.)
4
HSYNC
OUT
Horizontal synchronization
Outputs the horizontal synchronization signal (AFC). The polarity can be selected with a
output
metal switch.
5
Xtal
IN2
Crystal oscillator connection
Connection for the crystal and capacitor used to form the crystal oscillator that generates
6
Xtal
OUT2
the internal synchronization signal. (For a PAL crystal oscillator 4fsc = 17.734 MHz.)
7
VSYNC
OUT
Vertical synchronization output
Outputs the vertical synchronization signal. The polarity can be selected with a metal switch.
8
CS
Enable input
Enables/disables serial data input. Serial data is enabled when this pin is low. Pull-up
resistor built in (hysteresis input).
9
SIN
Data input
Serial data input. Pull-up resistor built in (hysteresis input).
10
SCLK
Clock input
Clock input for serial data input. Pull-up resistor built in (hysteresis input).
11
SECAM
SECAM mode switch input
Switches between SECAM and other modes.
Low = other modes, high = SECAM mode
12
525/625
525/625 switch input
Switches between 525 scan lines and 625 scan lines.
Low = 525 lines, high = 625 lines
13
NTSC/PAL
NTSC/PAL switch input
Switches the color mode between NTSC and PAL.
Low = NTSC, high = PAL
14
3.58/4.43
3.58/4.43 switch input
Switch FSC between 3.58 MHz and 4.43 MHz.
Low = 3.58, high = 4.43
15
RST
Reset input
System reset input pin, low is active (reset).
Pull-up resistor built in (hysteresis input).
16
CV
OUT
Video signal output
Composite video output
17
V
DD2
Power supply connection
Power supply connection for composite video signal level generation
18
CV
IN
Video signal input
Composite video input
19
CV
CR
Video signal input
SECAM chroma signal input
20
SYNC
IN
Sync separator circuit input
Built-in sync separator circuit video signal input
21
SEP
C
Sync separator circuit
Built-in sync separator circuit (AMP out)
22
V
SS
Ground
Ground connection
23
PD
OUT
Control voltage output
AFC control voltage output
24
AMP
IN
AFC filter connection
Filter connection
25
AMP
OUT
26
FC
Control voltage input
AFC control voltage input
27
VCO
IN
LC oscillator connection
VCO LC oscillator circuit coil and capacitor connection
28
VCO
OUT
29
SYNC
DET
External synchronization signal
Outputs the exclusive NOR of the horizontal synchronization signal (AFC) and CSYNC (sync
detection output
separator).
30
V
DD1
Power supply connection
Power supply connection (+5 V: digital system power supply)
No. 4453-3/14
LC74760, 74760M
Pin Assignment
Serial Data Input Timing
No. 4453-4/14
LC74760, 74760M
System Block Diagram
No. 4453-5/14
LC74760, 74760M
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