Sanyo LC7454M Specifications

Ordering number : ENN*6685

CMOS IC

LC7454A/M

CMOS Data Slicer

Preliminary

Overview

The LC7454A/M is a data slicer IC for the Index Plus + signals. The LC7454A/M extracts the Caption and the Index Plus + data form the Vertical Blanking Period of the TV signal and send it out to the decoder IC (Usually Microcomputer).

The LC7454A/M can be used to extract the Closed Caption signals, the XDS signals and the Index Plus + signals.

Features

(1)Low power dessipation by CMOS process

(2)Stable signal extraction by integrated peak hold circuit and digital circuit.

(3)

Operation Voltage range

:

5V ± 10%

(4)

Package

LC7454A :

DIP18

LC7454M :

MFP20

Ver.1.03	91400 RM (IM) Ohta No.6685-1/16
90699

LC7454A/M

Pin Assignment

DIP18

MFP20

1

VSS1

CP 18

1

VSS1

CP 20

2

TEST

VSS2

19

2

TEST

VSS2 17

3

LN26

VDD2 18

3

LN26

VDD2 16

O/

/CFOUT

MOD1

4

17

E

4

O/

E

/CFOUT

MOD1 15

/CFIN

VCOR

5

16

HS

5

HS

/CFIN

VCOR

14

DATA

CVIN

6

15

DATA

CVIN

6

13

7

SCKIN

MOD0 14

SCKIN

MOD0

7

12

8

CE

VDD1 13

VDD1

8

CE

11

9

IOC

SLICE

12

IOC

SLICE

NC

NC

9

10

10

11

LC7454A

LC7454M

* VDD1and VSS1are power supply terminals for digital circuit. VDD2 and VSS2 are power supply terminals for analog circuit. Connect there terminals as the following diagram in order to reduce the noise disturbance between two powers.

LC7454A/M

VDD1

Power supply

VSS1

VDD2

VSS2

No.6685-2/16

LC7454A/M

Package Dimension

(unit : mm)

3007B

SANYO : DIP-18

Package Dimension

(unit : mm)

3036C

SANYO : MFP-20

No.6685-3/16

LC7454system block diagram

LN26
IOC
CE
DATA	Data
	input/output
	control

SCKIN			Input
			control

4/16-6685.No

		CVIN		HS/CFIN		O/E/CFOUT
			(Mode 1)	(Mode 2)	(Mode 2)	(Mode 1,3)
		Pedestal clamp	(Mode3)		Oscillation
					circuit
	Data slicer	Sync separator
			(Mode 3)
			(Mode 1)	(Mode 2)		CP
16bit line select	Data slicer control			PLL reference clock
data buffer				PLL
	Slice line					VCOR
	selection			(VCO)

SLICE

32bit data buffer

Data judgment

Data transmit control

16bit data		32bit data		32bit data		32bit data		32bit data		32bit data
judgement buffer		output buffer 1		output buffer 2		output buffer 3		output buffer 4		output buffer 5

LC7454A/M

LC7454A/M

Operation on each mode

The LC7454 has three operating modes. The operation mode be selected by the status of MOD0 and MOD1 terminals. The functionality of three modes are the same. Only the PLL reference frequency which is used to generate operation clock is different. Use mode1 or mode3 only in the application which uses 2x data. Any mode (Mode1,2 or 3) can be used in the 1x data only application.

	Terminal		MODE	Applications	PLL reference
	MOD1	MOD0
	Open	Open	Mode1	NTSC-VCR	Use H-sync signal which is separated from C-Video signal.
	Open	VDD1	Mode2	NTSC-VCR	Use 1/32 divided signal 503 KHz which is generated by external
					ceramic resonator.
	VDD	Open	Mode3	NTSC-TV	Use H-sync signal from Fly Back.

Terminal Functions

Terminal #

Terminal

Function Description

(DIP18)

name

Mode 1

Mode 2

Mode 3

1

VSS1

Ground

2

TEST

Test terminal, Open in normal operation

3

LN26

32 s Pulse output at line 26 timing on both field

4

O/

E

/CFOUT

Pulse output for field

Output terminal for ceramic

Pulse output for field

judgment

*1

resonator

judgment

*1

5

/CFIN

Sync separated

pulse

Input terminal for Ceramic

External

pulse input

HS

HS

HS

output

resonator

6

DATA

Line select data input and slice data output

*2

7

SCKIN

Data transmit clock input

8

Chip select input

*3

CE

9

IOC

Data direction control signal input

*4

10

SLICE

Pulse output at selected slice line

11

VDD1

Power terminal

12

MOD0

Open

Connect to VDD

Open

13

CVIN

Conposit video input

14

VCOR

Connect resister for internal VCO oscillation frequency control

15

MOD1

Open

Open

Connect to VDD

16

VDD2

Power terminal

17

VSS2

Ground

18

CP

Filter terminal for internal PLL

*1 ‘H’ level in Odd field, ‘L’ level in Even field. *2 N-ch open drain in output mode.

*3 Feed ‘L’ level only when data transmission is in effect. If CE=’H’, data terminal will become input/output disable, SCKIN terminal will become input disable.

*4 ‘H’ level : Output mode ‘L’ level : Input mode

No.6685-5/16