TDA4780 datasheet(26/44 Pages) PHILIPS

26 / 44 page

1997 Feb 06

Philips Semiconductors

Preliminary speciﬁcation

RGB video processor with automatic

cut-off control and gamma adjust

TDA4780

Threshold 3 (TH3)

I16(3)(max)(dch)

maximum discharge current

TH3 = MX + VLiL;

undelayed

0.45

0.6

0.75

steepness

−

1.5

−

mA/V

CHARGE CURRENT

I16

charge current

−2

−1

−0.5

µA

V16

start of contrast reduction

−

∆V16

input range for full contrast reduction

−−2

−

V16

start of brightness reduction

−

2.5

−

∆V16

input range for full brightness reduction

−−1.6

−

V16(max)

maximum voltage by internal limitation

4.5

−−

Hue adjust output (pin 26); note 14

Vo26(min)

minimum output voltage

YEXH = 0; I2C-bus

data 00H

0.5

−

1.0

Vo26(nom)

nominal output voltage

YEXH = 0; I2C-bus

data 20H

3.0

3.2

3.4

Vo26(max)

maximum output voltage

YEXH = 0; I2C-bus

data 3FH

4.8

−

5.6

I26

current of internal emitter follower

500

700

−µA

I2C-bus inputs

f28

clock frequency range

−

100

kHz

tSU;DAT

data set-up time

250

−−

clock pulse HIGH

−−

µs

clock pulse LOW

4.7

−−

µs

rise time

−−

µs

fall time

−−

0.3

µs

Input levels (pins 27 and 28)

VIL

LOW level input voltage

−−

1.5

VIH

HIGH level input voltage

3.0

−

5.5

input current

V27 and V28 = 0.4 V

−10

−−

µA

V27 and V28 = 0.9VP

−−

µA

Output level (pin 27)

VOL

LOW level output voltage

−−

0.4

output current

V27 = 0.4 V

3.0

−−

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX. UNIT

TDA4780 Datasheet(PDF) 26 Page - NXP Semiconductors

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