TDA4657 datasheet(2/17 Pages) PHILIPS

2 / 17 page

June 1993

Philips Semiconductors

Preliminary speciﬁcation

Generic multi-standard decoder

TDA4657

FEATURES

• Low voltage (8 V)

• Low power dissipation (250 mW)

• Automatic standard recognition

• No adjustments required

• Reduced external components

• Not all time constants integrated

(ACC, SECAM de-emphasis).

GENERAL DESCRIPTION

The TDA4657 is a monolithic integrated multi-standard

colour decoder for PAL, SECAM and NTSC 4.43 MHz with

negative colour difference output signals. It is adapted to

the integrated baseband delay line TDA4660/61.

QUICK REFERENCE DATA

Notes to the quick reference data

Within 2 dB output voltage deviation.

2. Burstkey width 4.3

µs

Burst width 2.25

µs,

ratio burst chrominance amplitude 1/2.2.

ORDERING INFORMATION

Note

1. SOT146-1; 1996 November 26.

2. SOT163-1; 1996 November 26.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP. MAX.

UNIT

Supply

supply voltage

7.2

8.0

8.8

supply current

VP = 8.0 V; without load 25

Ptot

total power dissipation

VP = 8.0 V; without load −

248

296

Inputs

chrominance input voltage

(peak-to-peak value)

note 1

200

400

V20

sandcastle input voltage

−−

13.2

Outputs

colour difference output signals

(peak-to-peak value)

independent of supply voltage; note 2

−(R−Y) output PAL and NTSC 4.43 MHz

442

525

624

SECAM

950

1050 1150

−(B−Y) output PAL and NTSC 4.43 MHz

559

665

791

SECAM

1200

1330 1460

EXTENDED

TYPE NUMBER

PACKAGE

PINS

PIN POSITION

MATERIAL

CODE

TDA4657

DIL

plastic

SOT146(1)

TDA4657T

plastic

SOT163A(2)

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