Pin Assignments

one shown below to minimize mutual interference due to noise from these blocks.

No. 5680-2/13

LC7455A, 7455M

Pin Functions

Pin

Pin No.

Pin function

DIP16

MFP18

Mode 1

Mode2

Mode3

Mode4

1

1

Ground

TEST

2

2

Test pin. Must be left open during normal operation.

LN21

3

3

Line 21H pulse output (even field)

Line 21H pulse output

Line 22H pulse output

(both fields)

(both fields)

O/E/CFOUT

4

4

Field discrimination pulse

Ceramic oscillator output

Field discrimination pulse output

output

HS/CFIN

5

5

Sync separator Hsync

Ceramic oscillator input

Hsync pulse input

pulse output

CPDT

6

6

Caption data output (n-channel open-drain output)

SCKIN

7

7

Caption data transfer clock input

CE

8

8

Chip select input

9

11

Power supply

MOD0

10

12

Leave open

Short to the power supply

Leave open

Short to the power supply

CVIN

11

13

Composite video input

VCOR

12

14

Connection for an external resistor to control the built-in VCO oscillator frequency

MOD1

13

15

Leave open

Short to the power supply

14

16

Power supply

15

17

Ground

CP

16

18

Connection for the filter used by the built-in PLL

Power

supply

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