TDA18271HD/C2.557 NXP Semiconductors, TDA18271HD/C2.557 Datasheet - Page 7
TDA18271HD/C2.557
Manufacturer Part Number
TDA18271HD/C2.557
Description
Manufacturer
NXP Semiconductors
Datasheet
1.TDA18271HDC2.557.pdf
(70 pages)
Specifications of TDA18271HD/C2.557
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TDA18271HD_4
Product data sheet
8.3.1 Loop-through output
8.3.2 Slave tuner output
8.3 Tuner outputs
8.4 Crystal input mode
8.5 Crystal output mode
The tuner provides a slave tuner output (pin STO) and a loop-through output (pin LT).
These outputs are used to transmit the antenna signal to other tuners. Each output has its
own characteristics (see
The gain between the antenna connector and the loop-through pin (pin LT) equals 0 dB.
This pin can be connected to any consumer electronic equipment.
In dual tuner applications the slave tuner output (pin STO) must be connected to the RF
input of the slave tuner TDA18271HD.
The gain between the antenna connector and the slave tuner output can change
according to the input level. The slave tuner will automatically compensate for the gain
change, using the MASTERSYNC and FREEZE signals.
The TDA18271HD requires a 16 MHz crystal reference. The chosen crystal must
withstand at least 100 W drive level and an additional shunt capacitor with a typical value
of 5.6 pF as shown in
performances are guaranteed are:
Clock reference:
Pins XTOUTP and XTOUTN deliver a symmetrical sine waveform to drive the channel
decoder and/or IF demodulator. The load on these outputs should be made similar to
ensure optimum performances. If only one crystal output is used, the unused output
should be loaded by an equivalent capacitance.
•
•
•
•
•
•
NDK NX5032
Siward SX-5032
TXC 9C series
Chungho Elcom HC49S profile
In Master mode, the clock reference must be provided by a 16 MHz crystal connected
between pins XTALP and XTALN of the master tuner
In Slave mode, the clock reference must be provided by pins XTOUTP and XTOUTN
of the tuner in Master mode to pins XTALP and XTALN of the tuner in Slave mode
Figure 1
Rev. 04 — 19 May 2009
Table 58
is also needed. The quartz references for which the
and
Table
59).
TDA18271HD
© NXP B.V. 2009. All rights reserved.
Silicon Tuner IC
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