TDA2579B View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
TDA2579B Datasheet PDF : 21 Pages
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Philips Semiconductors
Horizontal/vertical synchronization circuit
Preliminary specification
TDA2579B
PARAMETER
Switching level:
normal to fast (locking)
mute output inactive
Switching level fast to normal
(locking)
Switching level normal to slow
(gated sync pulse)
Video transmitter identification output
(pin 13)
Output voltage active
(no sync)
Sink current active
(no sync)
Output current inactive
(sync 50 Hz)
50/60 Hz identification (pin 13)
(R13 positive supply 12 kΩ)
Emitter follower, pnp:
CONDITIONS
I13 = 1 mA
V13 < 1 V
SYMBOL MIN.
V18
> 1.5
V18
> 4.7
V18
7.4
V13
−
I13
−
I13
−
TYP.
1.75
5.0
7.8
0.15
−
−
MAX. UNIT
2.0
V
5.3
V
8.2
V
0.32
V
5
mA
1
µA
60 Hz: 2-----f×--V---f--H-- < 576 voltage
50 Hz: 2-----×f--V---f--H-- > 576 voltage
Flyback input pulse (pin 12)
Switching level
Input current
Input pulse
Input resistance
Phase position without shift
time between the middle of the
sync pulse at pin 5 and the
middle of the horizontal
blanking pulse at pin 17
Vertical ramp generator (pin 3)
Pulse width charge current
Charge current
Top level ramp signal voltage
Divider in 50 Hz mode
Divider in 60 Hz mode
note 7
note 7
V13
7.2
7.65
8.1
V
V13
−
V10
−
V
V12
−
+1
−
V
I12
+0.2
−
+3
mA
V12
−
−
12
VP
−
3.5
−
kΩ
td
2.1
2.5
2.9
µs
−
−
26
−
clock
pulses
I3
−
3
−
mA
V3
5.5
5.85
6.3
V
V3
4.55
4.85
5.25
V
September 1990
15
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