Philips TDA4557 Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TDA4557

Multistandard decoder

Product speciﬁcation File under Integrated Circuits, IC02

March 1991

Philips Semiconductors Product speciﬁcation

Multistandard decoder TDA4557

GENERAL DESCRIPTION

The TDA4557 is a monolithic integrated multistandard colour decoder for the PAL, SECAM, NTSC 3.58 MHz and NTSC 4.43 MHz standards.

FEATURES Chrominance part

• Gain controlled chrominance amplifier for PAL, SECAM and NTSC

• ACC rectifier circuits (PAL/NTSC, SECAM)

• Burst blanking (PAL) in front of 64 µs glass delay line

• Chrominance output stage for driving the 64 µs glass

delay line (PAL, SECAM)

• Limiter stages for direct and delayed SECAM signal

• SECAM permutator

Demodulator part

• Flyback blanking incorporated in the demodulators (PAL, NTSC, SECAM)

• PAL switch

• Internal PAL matrix

• Two quadrature demodulators with external reference

tuned circuits (SECAM)

• Internal filtering of residual carrier

• De-emphasis (SECAM)

Identiﬁcation part

• Automatic standard recognition by sequential inquiry

• Delay for colour-on and scanning-on

• Reliable SECAM identification by PAL priority circuit and

50/60 Hz recognition

• Forced switch-on of a standard

• Four switching voltages for chrominance filters, traps

and crystals

• Two identification circuits for PAL/SECAM (H/2) and NTSC

• PAL/SECAM flip-flop

• SECAM identification mode switch (horizontal, vertical

or combined horizontal and vertical)

• Crystal oscillator with divider stages and PLL circuitry (PAL, NTSC) for double colour subcarrier frequency

• HUE control (NTSC)

• Service switch

QUICK REFERENCE DATA

PARAMETER SYMBOL MIN. TYP. MAX. UNIT

Supply voltage (pin 13) V Supply current (pin 13) I Chrominance input voltage

(peak-to-peak value) V

Chrominance output voltage

(peak-to-peak value) V

Colour difference output voltages

(peak-to-peak values)

−(R-Y) V

−(B-Y) V

Sandcastle pulse (pin 24) Required amplitude to separate

vertical and horizontal pulse V horizontal pulse V burst gating pulse V

PACKAGE OUTLINE

15(p-p)

12(p-p)

1(p-p) 3(p-p)

24(p-p) 24(p-p) 24(p-p)

10.8 12.0 13.2 V

− 65 − mA

20 100 400 mV

− 1.6 − V

− 1.05 V ± 2dB − V

− 1.33 V ± 2dB − V

2.0 2.5 3.0 V

4.1 4.5 4.9 V

7.7 − V

28-lead DIL; plastic (SOT117); SOT117-1; 1996 November 27.

March 1991 2

Philips Semiconductors Product speciﬁcation

Multistandard decoder TDA4557

March 1991 3

Fig.1 Block diagram.

Philips Semiconductors Product speciﬁcation

Multistandard decoder TDA4557

RATINGS

Limiting values in accordance with the Absolute Maximum System (IEC 134)

PARAMETER SYMBOL MIN. MAX. UNIT

Supply voltage (pin 13) V Voltage range at pins 10, 11, 17, 23,

24, 25, 26, 27, 28 to pin 9 (ground) V Current at pin 12 I Peak value I Total power dissipation P Storage temperature range T Operating ambient temperature range T

n-9 12 12M

tot

stg

amb

− 13.2 V

− 8mA

− 15 mA

− 1.4 W

−25 + 150 °C

0 + 70 °C

March 1991 4

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