TDA4886 datasheet(13/52 Pages) PHILIPS

13 / 52 page

1998 Nov 11

Philips Semiconductors

Product speciﬁcation

140 MHz video controller with I2C-bus

TDA4886

Fast blanking (pin 1) and OSD signal insertion (channel 1: pin 2; channel 2: pin 3; channel 3: pin 4); note 13

fast blanking input signal

no video signal blanking,

OSD signal insertion disabled

−

1.1

video signal blanking,

OSD signal insertion enabled

1.7

−

V2,3,4

OSD input signal

V1 > 1.7 V

no internal OSD signal

insertion

−

1.1

internal OSD signal insertion

1.7

−

tr(OSD)

rise time of OSD colour signals

(pins 22, 19 and 16)

10 to 90% amplitude;

input pulse with 1.2 ns/V

−−

4ns

tf(OSD)

fall time of OSD colour signals

(pins 22, 19 and 16)

90 to 10% amplitude;

input pulse with 1.2 ns/V

−−

7ns

tg(CO)

width of (negative going) OSD

signal insertion glitch, leading

edge (pins 22, 19 and 16)

identical pulses at fast blanking

input (pin 1) and OSD signal

inputs (pins 2, 3 and 4)

−

6ns

tg(OC)

width of (negative going) OSD

signal insertion glitch, trailing

edge (pins 22, 19 and 16)

identical pulses at fast blanking

input (pin 1) and OSD signal

inputs (pins 2, 3 and 4)

−

6ns

dVOSD

overshoot/undershoot of OSD

colour signal related to actual

OSD output pulse amplitude

(pins 22, 19 and 16)

pulse with 1.2 ns/V at OSD

signal inputs (pins 2, 3 and 4)

−−

VOSD(max)

maximum OSD colour signal

related to nominal colour signal

(pins 22, 19 and 16)

maximum OSD contrast;

maximum gain

100

120

140

OSD contrast control; see Fig.9 and note 14

dOC

OSD colour signal related to

maximum OSD colour signal

0FH (maximum)

−

00H (minimum)

−14

−12

−10

Subcontrast/contrast modulation and beam current limiting (pin 24); see Fig.8 and note 15

V24(nom)

nominal input voltage

pin 24 open-circuit

4.7

5.0

5.3

V24(start)

starting voltage for contrast

and OSD contrast reduction

4.2

4.5

4.8

V24(stop)

stop voltage for contrast and

OSD contrast reduction

−32 dB below maximum colour

signal (contrast setting 3FH)

1.5

2.0

2.5

B24

bandwidth of contrast

modulation

−3dB

−−

MHz

I24(max)

maximum input current

V24 =0V

−1.0

−−

µA

Brightness control; see Fig.10 and notes 16 and 17

∆V

difference between black level

and reference black level at

signal outputs related to

nominal colour signal

3FH (maximum)

10H (nominal)

−

00H (minimum)

−12

−10

−8%

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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