Panasonic AN5637 Datasheet

ICs for TV

AN5637

SECAM decoder IC

■ Overview

The AN5637 is a chroma signal processing circuit
for use in SECAM system. It outputs the color dif­ference signal.

■ Features

• Built-in bell filter, deemphasis circuit

• One point adjustment

• Small number of external components

■ Applications

• SECAM system TV

16 9

18

(0.71)

Seating plane

19.2±0.3

2.54

0.5±0.1

1.22±0.25

6.2±0.3

3.55±0.051.10±0.25

5.20±0.25

7.62±0.25

3° to 15

3.05±0.25

DIP016-P-0300D

Unit : mm

°

0.30

0

.1

0

+

5

.0

0

–

1

AN5637 ICs for TV

■ Block Diagram

Killer Mon.

Bell Ref.

Bell Mon.

11

7

2

Inversion

B

V

Limiter Amp.

SCP In

15

H.VBLK

generation

IH FF

B

Limiter Amp.

BGP

generation

B

generation

Reset pulse

ID discrimination

V/I conversion

B

V

VBLK

generation

V

Internal

discrimination

SECAM/Non-SECAM

V/I conversion

14

ICO

N.C.

V

N.C.

13

Band Gap

De-Emp.

12

N.C.

3

6

8
5

4

V

CC

GND

PLL Ref.

Bell Filter

Current shift

(VBLK,BGP,Signal)

B−Y Amp.

V

Limiter Amp. Phase Det. Loop Filter

Output Filter

10

9

−(B−Y) Out

−(R−Y) Out

ACC Amp.

16

C-In

B

ACC Det. Amp.

External

discrimination

SECAM/Non-SECAM

1

ref

ID/f

Output Filter R−Y Amp.

2

ICs for TV AN5637

■ Pin Descriptions

Pin No. Description

Pin No. Description

1 Reference frequency signal/

Ident input pin

2 Bell filter output monitor pin
3 Power supply pin
4 Black level adjustment voltage input pin
5 Black level adjustment reference voltage

output pin
6 Grounding pin
7 Bell filter automatic adjustment sample

hold pin

8 PLL filter automatic adjustment sample

hold pin

9 − (R−Y) output pin

10 − (B−Y) output pin
11 Killer voltage monitor pin
12 N.C.
13 N.C.
14 N.C.
15 Sand castle pulse input pin
16 SECAM signal input pin

■ Absolute Maximum Ratings

Parameter Symbol Rating Unit

Supply voltage V
Supply current I

2

Power dissipation
Operating ambient temperature
Storage temperature

Note) *1:Ta = 25 °C except operating ambient temperature and storage temperature.

*2: Power dissipation of the package at Ta = 70 °C.

*

1

*

1

*

CC

CC

P

D

T

opr

T

stg

11.0 V
73 mA

777 mW

−20 to +70 °C

−55 to +150 °C

■ Recommended Operating Range

Parameter Symbol Range Unit

Supply voltage V

CC

■ Electrical Characteristics at VCC = 9 V, Ta = 25 °C

Parameter Symbol Conditions Min Typ Max Unit

Power supply
Supply current I
Pin voltage V

Current when VCC = 9 V 304050mA

3

Voltage when VCC = 9 V 2.9 3.2 3.5 V

5

7.2 to 9.9 V

3

AN5637 ICs for TV

■ Electrical Characteristics at VCC = 9 V, Ta = 25 °C (continued)

Parameter Symbol Conditions Min Typ Max Unit

Input(Pin16) Typical input : (Pin16) Color bar signal, (Pin15) Sand castle pulse,

(Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period

Input dynamic range V

1

Chroma signal input amplitude

*

V
Input impedance Z
Bell filter Typical input : (Pin16) 4.0 MHz to 4.6 MHz sine wave 10 mV[p-p],

Bell adjusting voltage V

Center frequency f

Band width B Band width of bell filter 250 3 10 370 kHz

ACC Typical input : (Pin16) Color bar signal (Composite) 1 V[p-p],

ACC characteristics 1 ACC1 Output change amount when −606%

ACC characteristics 2 ACC2 Output change amount when −606%

Demodulator/Output Typical input : (Pin16) Color bar signal (Composite) 1 V[p-p],

PLL adjusting voltage V

R−Y output amplitude V

B−Y output amplitude V

Detector output linearity L

R−Y/B−Y output ratio

2

Black level adjusting voltage

Black level error (R−Y)

Note) *1: Refer to "Explanations of testing method 1"

*2: Refer to "Explanations of testing method 2"

*

2

*

(R−Y)(B−Y)

V

f

Composite signal input amplitude  1.0 1.5 V

DR16

range
Chroma signal input amplitude range

ch.16

DC measurement 17 25 33 kΩ

16

300

(Pin15) Sand castle pulse,
(Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period

Sample hold pin voltage at bell 2.8 3.9 5 V

ADB

filter automatic adjustement
Center frequency of bell filter 4.202 4.262 4.322 MHz

OB

(Signal period)

(Signal period)

(Pin15) Sand castle pulse,
(Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period

discrimination signal changes from
150 mV[p-p] to 300 mV[p-p]

discrimination signal changes from
150 mV[p-p] to 15 mV[p-p]

(Pin15) Sand castle pulse,
(Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period

Sample hold pin voltage at PLL 3.1 3.7 4.3 V

ADV

automatic adjustement
Color bar (Composite) signal input 0.85 1.00 1.15 V[p-p]

RY

(1 V[p-p])
Color bar (Composite) signal input 1.07 1.27 1.47 V[p-p]

BY

(1 V[p-p])
Color bar (Composite) signal input −606%

O

(1 V[p-p])
Amplitude ratio of VRY and V
Pin4 voltage when difference of 1.45 2.1 2.75 V

AD4

1.12 1.27 1.42 Times

BY

B−Y black level becomes 0
Value referred to input frequency 10 kHz

BER

mV[p-p]

4