October 1991

6

Philips Semiconductors

Preliminary specification

SECAM decoder

TDA8395

Notes to the characteristics

1. If measured in the burst-period of a blue line.

2. The video input is AC-coupled.

3. During scan.

5. Converted to input frequency error.

6. Defined as the ratio between the peak-to-peak value of the B

−Y component of the demodulated 100/75 colour bar

and the peak-to-peak value of the noise.

7. The reference should be stable during frame blanking.

8. The SECAM enable and disable timing should preferably be at the end of the frame blanking.

9. The externally supplied voltage should exceed 0.5 V.

Sandcastle pulse

blanking detection level

1.0

1.25

1.5

V

burst gate detection level

3.5

3.85

4.2

V

falling edge of burst gate to

start sync

8.5

9.0

9.5

µs

Reference/communication

reference frequency

note 7

−

4.4336

−

MHz

reference voltage amplitude

(peak-to-peak value)

0.20

−

0.50

V

SECAM enable detection

level; pin 1

−

2.8

3.3

V

SECAM disabled detection

level; pin 1

note 8

1.5

2.0

−

V

sink current at SECAM

identification; pin 1

note 9

−

150

−µA

Identification

identification time

−

4

−

frames

H

colour on/off hysteresis

3

−−

dB

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT