Sanyo LC74402 Specifications

Ordering number : EN*4872A

93098HA (OT) / 30295TH (OT) No. 4872-1/19

LC74401E, 74402, 74402E

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

PIP Controllers

CMOS IC

Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.

Overview

The LC74401E, LC74402, and LC74402E are memory
controllers for TV set and VCR PIP (picture in picture)
systems. Since these LSIs include three D/A converter
circuits, a component PIP system can be constructed by
combining one of these LSIs with memory and an A/D
converter such as the LC7480.

Features

• Horizontal resolution: 600 TV lines

*1

• Three D/A converters (for the Y, R-Y, and B-Y signals)
are incorporated in the PIP memory controller block.

• High image quality is supported by vertical filter
function frame memory processing*2.

•I2C bus controlled.

• Built-in PLL circuit (requires an external LPF)

• Supports NTSC, PAL, and multiple (NTSC-PAL)
formats

• External control functions (only provided by the
LC74401E)
— 8-bit D/A converter (PWM): Six pins
— General-purpose ports: Four pins

• Sub-screen specifications
— Number of sub-screens: 1-8

*2

— Display on/off and frame on/off/color switching,

wipe function

— Supports switching between fixed (4 corners) and

arbitrary (8-bit specification of vertical and
horizontal position) display positions.

— Size: Area: 1/4, 1/9, 1/16, Vertical compression: 1/2,

1/3, 1/4; Horizontal compression: 2/3, 1/3, 1/6

Note: Horizontal compression can be adjusted by

changing the PLL divisor.
The display area can be changed independently
in the vertical and horizontal directions.

— Horizontal resolution (Y signal): About 250 dots
— Gradation (quantization): 64 (6 bits)

• Operating supply voltage: 5 V ± 10%

• QFP80E: LC74401E

• DIP64S: LC74402-Pin assignment identical to the
LC7442 (except for the serial control pins)

• QFP64E: LC74402E-Pin assignment identical to the
LC7442E (except for the serial control pins)
Note 1

When the main screen synchronization PLL has the standard value
(PLL7 to PLL3 = 10011)

Note 2: The specifications depend on the amount of

external memory as listed in the table below.

o: Frame display of both dynamic and static images supported.

(Frame memory processing)

▲▲: Frame display of dynamic images only supported.

✕: Not supported.

Note: The number of sub-screens listed in the table above are doubled

in split mode. (However, image quality is reduced.)

D/A Clock

Y 15.00 MHz
R-Y 3.75 MHz
B-Y 3.75 MHz

Display memory 256 K 1 M
One screen ▲▲ o

Two screens ✕ o
Three screens ✕ ▲▲
Four screens ✕ ▲▲

Pin Assignments

No. 4872-2/19

LC74401E, 74402, 74402E

unit: mm

3159-QFP64E

[LC74402E]

unit: mm

3071-DIP64S

SANYO: DIP64S

[LC74402]

Package Dimensions

unit: mm

3074-QFP80E

SANYO: QIP80E

[LC74401E]

SANYO: QIP64E

No. 4872-3/19

LC74401E, 74402, 74402E

Block Diagram

No. 4872-4/19

LC74401E, 74402, 74402E

Component-Type PIP System Structure Based on the LC74401E/2/2E and the LC7480

No. 4872-5/19

LC74401E, 74402, 74402E

Functional Overview

1. Reduction options
Vertical: Selectable 1/2, 1/3 and 1/4 reduction vertical filter coefficients.
Horizontal: (1/1) to 2/3 to (1/2) to 1/3 to (1/4) to 1/6. Intermediate values are implemented using the aspect
correction function.

2. Number of sub-screens
With 1 Mb of memory: 1 to 4 or (8). * Values in parentheses are for SPLIT mode, where the image quality is
reduced.
With 256 kb of memory: 1 or (2).

3. Static images
With 1 Mb of memory: Frame static image (supported with 2 or fewer screens) or field static images
With 256 kb of memory: Field static image

4. Display position
Screen A: Fixed positions in the four corners
Screen B: Free positioning (Specified by 8 bits in each of the vertical and horizontal directions.)

5. Frame

• On/off selectable

• Two types that differ by insertion method

— Pin frame: The frame position is specified by a high level pin output. (application frame insertion)
— D/A frame: A 50% white or arbitrary color overlapped on the Y, R-Y, and B-Y video signals.

6. Wipe
Twelve types

7. Blanking size
The vertical and horizontal directions can be specified independently (6 bits each)
Sixteen forms can be specified.

8. Blue background
The sub-screen can be set to all blue or all black.

9. Memory clear
Sets the data written to video memory to a fixed value corresponding to a 25% white color.

10. Wide-screen TV support

• Aspect correction function

• Subtitle shifting

The subtitle area can be trimmed and displayed as a sub-screen.
The vertical reduction ratio can be set independently to 1/4, 1/3, or 1/2. The horizontal reduction can be set to
values up to 1/1 using mode 2E.

11. Support for NTSC, PAL, and multi-mode (NTSC-PAL) products

12. External control functions using an I2C interface (LC74401E only)

• Six 8-bit D/A converter circuits built-in (PWM)

• Four general-purpose ports built-in

13. Setting adjustments
Fine adjustment of various settings, including sub-screen position displacement and color shift is supported.

No. 4872-6/19

LC74401E, 74402, 74402E