TDA4885 Datasheet, PDF (13/56 Pages) NXP Semiconductors – 150 MHz video controller with I2C-bus

Philips Semiconductors
150 MHz video controller with I²C-bus
Product specification
TDA4885
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Fast blanking (pin 1) and OSD signal insertion (channel 1: pin 2; channel 2: pin 3; channel 3: pin 4); note 13
V₁
fast blanking input signal
no video signal blanking, OSD 0
−
1.1
V
signal insertion disabled
video signal blanking, OSD
1.7
−
V_P − 1 V
signal insertion enabled
V_{2, 3, 4}
OSD input signal
V₁ > 1.7 V
no internal OSD signal
insertion
0
−
1.1
V
t_f(FBL)
fall time of colour signals
(pins 30, 25 and 20)
internal OSD signal insertion 1.7
−
V_P − 1 V
90 to 10% amplitude; start of −
−
10
ns
fast blanking pulse at pin 1 with
1.2 ns/V; note 14; see Fig.10
t_r(FBL)
rise time of colour signals
10 to 90% amplitude; end of −
−
10
ns
(pins 30, 25 and 20)
fast blanking pulse at pin 1 with
1.2 ns/V; note 14; see Fig.10
t_r(OSD)
rise time of OSD colour signals 10 to 90% amplitude; input
−
−
4
ns
pulse with 1.2 ns/V; see Fig.10
t_f(OSD)
fall time of OSD colour signals 90 to 10% amplitude; input
−
−
7
ns
pulse with 1.2 ns/V; see Fig.10
t_g(CO)
width of (negative going) OSD identical pulses with 1.2 ns/V at −
−
6
ns
signal insertion glitch, leading fast blanking input (pin 1) and
edge
OSD signal inputs (pins 2,
3 and 4); note 15; see Fig.10
t_g(OC)
width of (negative going) OSD identical pulses with 1.2 ns/V at −
−
6
ns
signal insertion glitch, trailing fast blanking input (pin 1) and
edge
OSD signal inputs (pins 2,
3 and 4); note 15; see Fig.10
dV_OSD
overshoot/undershoot of OSD OSD input pulse (pins 2, 3
−
13 20
%
colour signal related to actual and 4) with 1.2 ns/V; V₁ > 1.7 V
OSD output pulse amplitude
t_over
V_OSD(max)
time of OSD signal overshoot OSD input pulse (pins 2, 3
−
−
2
ns
exceeding 10%
and 4) with 1.2 ns/V; V₁ > 1.7 V
maximum OSD colour signal maximum OSD contrast;
100 125 150
%
related to nominal colour signal maximum gain; pins 12,
13 and 14 connected to ground
OSD contrast control; see Fig.11 and note 16
d_OC
OSD colour signal related to
maximum OSD colour signal
00H (minimum)
0FH (maximum)
−14 −12 −10
dB
−
0
−
dB
1997 Nov 25
13