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TDA4657T Scheda tecnica(PDF) 9 Page - NXP Semiconductors

Il numero della parte TDA4657T
Spiegazioni elettronici  Generic multi-standard decoder
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Produttore elettronici  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

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June 1993
9
Philips Semiconductors
Preliminary specification
Generic multi-standard decoder
TDA4657
Hue control (NTSC) and service switch (pin 11)
φ
phase shift of reference carrier
relative to phase at open-circuit pin 11
V11 =3V
−30
−−
degree
V11 = open-circuit
−50
+5
degree
V11 =5 V
+30
−−
degree
V11
internal bias voltage
(proportional to supply voltage)
pin 11 open-circuit
3.8
4.0
4.2
V
R11
input resistance
25
30
35
k
Capacitor for identification (pins 12 and 13)
V12, V13
DC voltage for an identified signal
2.8
3.2
3.5
V
DC voltage for an unidentified signal
1.5
2.0
2.3
V
PLL oscillator measured with nominal crystal (pin 14; see Table 1)
R14
initial oscillator amplifier input resistance
−500
−−
C14
oscillator amplifier input capacitance
−−
10
pF
∆f
L
lock-in-range referenced to
4.43361875 MHz
note 9
±400
−±1300
Hz
φ
phase difference for
±400 Hz deviation of
colour carrier frequency
−−
1
degree
2xfsc output (pin 16; if the output is not used, the pin should be connected to supply)
V16
DC output level
I16 = 0 A
6.1
6.3
6.5
V
R16
output resistance
I16 =0A
−−
350
I16
output current
−−
−1.0
mA
V16
output signal (peak-to-peak value)
250
mV
Standard setting inputs/outputs (pins 17 to 19; note 10)
used as output: npn emitter follower output with 0.1 mA source to ground
VO
on-state, during scanning, colour OFF
2.3
2.5
2.7
V
on-state, colour ON
5.8
6.0
6.2
V
RO
output resistance
IO =0
−−
300
IO
output current
−−
−3mA
used as input: forced system switching
VO
threshold for system ON
6.8
7.0
7.2
V
IO
input current
100
150
180
µA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT


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