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PDF TDA4661T Data sheet ( Hoja de datos )
| Número de pieza | TDA4661T | |
| Descripción | Baseband delay line | |
| Fabricantes | NXP Semiconductors | |
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Philips Semiconductors
Baseband delay line
Product specification
TDA4661
FEATURES
• Two comb filters, using the switched-capacitor
technique, for one line delay time (64 µs)
• Adjustment-free application
• No crosstalk between SECAM colour carriers (diaphoty)
• Handles negative or positive colour-difference input
signals
• Clamping of AC-coupled input signals (±(R−Y) and
±(B−Y))
• VCO without external components
• 3 MHz internal clock signal derived from a 6 MHz CCO,
line-locked by the sandcastle pulse (64 µs line)
• Sample-and-hold circuits and low-pass filters to
suppress the 3 MHz clock signal
• Addition of delayed and non-delayed output signals
• Output buffer amplifiers
• Comb filtering functions for NTSC colour-difference
signals to suppress cross-colour.
GENERAL DESCRIPTION
The TDA4661 is an integrated baseband delay line circuit
with one line delay. It is suitable for decoders with
colour-difference signal outputs ±(R−Y) and ±(B−Y).
QUICK REFERENCE DATA
SYMBOL
VP1
VP2
IP(tot)
VI
Gv
PARAMETER
MIN.
analog supply voltage (pin 9)
4.5
digital supply voltage (pin 1)
4.5
total supply current
−
±(R−Y) input signal PAL/NTSC (peak-to-peak value; pin 16) −
±(B−Y) input signal PAL/NTSC (peak-to-peak value; pin 14) −
±(R−Y) input signal SECAM (peak-to-peak value; pin 16)
±(B−Y) input signal SECAM (peak-to-peak value; pin 14)
−
−
gain VO / VI of colour-difference output signals
V11 / V16 for PAL and NTSC
V12 / V14 for PAL and NTSC
V11 / V16 for SECAM
V12 / V14 for SECAM
5.3
5.3
−0.6
−0.6
TYP.
5
5
4.9
525
665
1.05
1.33
5.8
5.8
−0.1
−0.1
MAX.
6
6
7.0
−
−
−
−
UNIT
V
V
mA
mV
mV
V
V
6.3 dB
6.3 dB
+0.4 dB
+0.4 dB
ORDERING INFORMATION
TYPE
NUMBER
TDA4661
TDA4661T
NAME
DIP16
SO16
PACKAGE
DESCRIPTION
plastic dual in-line package; 16 leads (300 mil) long body
plastic small outline package; 16 leads; body width 3.9 mm
VERSION
SOT38-4
SOT109-1
December 1994
2
1 page  
Philips Semiconductors
Baseband delay line
Product specification
TDA4661
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Sandcastle pulse input (pin 5)
fBK
fSAND
V5
Vslice
I5
C5
burst-key frequency
sandcastle frequency
top pulse voltage
internal slicing level
input current
input capacitance
note 3
14.2 15.625
14.2 15.625
4.0 −
V5 − 1.0 −
−−
−−
17.0 kHz
17.0 kHz
VP + 1.0 V
V5 − 0.5 V
10 µA
10 pF
Notes
1. The signal must be blanked line-sequentially. The blanking level must be equal to the non-colour signal.
2. Noise voltage at f = 10 kHz to 1 MHz; VI14, 16 = 0 (RS < 300 Ω).
3. The leading edge of the burst-key pulse or H-blanking pulse is used for timing.
December 1994
6
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet TDA4661T.PDF ] | |
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