TDA4566 Datasheet, PDF (2/11 Pages) NXP Semiconductors – Colour transient improvement circuit

Philips Semiconductors
Colour transient improvement circuit
Preliminary specification
TDA4566
GENERAL DESCRIPTION
The TDA4566 is a monolithic integrated circuit for colour-transient improvement (CTI) and luminance delay line in gyrator
technique in colour television receivers.
Features
• Colour transient improvement for colour difference signals (R-Y) and (B-Y) with transient detecting-, storage- and
switching stages resulting in high transients of colour difference output signals
• A luminance signal path (Y) which substitutes the conventional Y-delay coil with an integrated Y-delay line
• Switchable delay time from 550 ns to 820 ns in steps of 90 ns and additional fine adjustment of 37 ns
• Two Y output signals; one of 180 ns less delay
QUICK REFERENCE DATA
PARAMETER
CONDITIONS
SYMBOL
MIN. TYP.
Supply voltage (pin 10)
Supply current (pin 10)
Y-signal delay at pin 12
V_15-18 = 0 to 2.5 V
V_15-18 = 3.5 to 5.5 V
V_15-18 = 6.5 to 8.5 V
V_15-18 = 9.5 to12 V
Y-signal amplification
(R-Y) and (B-Y) signal
attenuation
output transient time
S1 open;
R_14-18 = 1.2 kΩ;
note 1
0.5 MHz
V_P
I_P
t_17-12
t_17-12
t_17-12
t_17-12
α_Y
α_cd
t_tr
10.8 12
−
35
490
550
580
640
670
730
760
820
0
1
−1
0
−
100
Note
1. Delay time is proportional to resistor R_14-18.
R_14-18 also influences the bandwidth; a value of 1.2 kΩ results in a bandwidth of 5 MHz (typ.).
MAX. UNIT
13.2 V
50
mA
610 ns
700 ns
790 ns
880 ns
2
dB
+1
dB
200 ns
PACKAGE OUTLINE
18-lead DIL; plastic (SOT102); SOT102-1; 1996 November 27.
March 1991
2