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TDA5051AT Datasheet(PDF) 11 Page - NXP Semiconductors

Part No. TDA5051AT
Description  Home automation modem
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Maker  NXP [NXP Semiconductors]
Homepage  http://www.nxp.com
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TDA5051A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 5 — 13 January 2011
11 of 29
NXP Semiconductors
TDA5051A
Home automation modem
11. Timing
11.1 Configuration for clock
For parameter description, see Table 6.
Fig 6.
External clock
For parameter description, see Table 6.
Fig 7.
Typical configuration for on-chip clock circuit
Table 6.
Clock oscillator parameters
Oscillator
frequency fosc
Carrier
frequency fcr
Clock output frequency
1
2fosc
External components
6.080 MHz to
9.504 MHz
95 kHz to
148.5 kHz
3.040 MHz to 4.752 MHz
C1 = C2 = 27 pF to 47 pF;
Rp =2.2 MΩ to 4.7 MΩ;
XTAL = standard quartz crystal
Table 7.
Calculation of parameters depending on the clock frequency
Symbol
Parameter
Conditions
Unit
fosc
oscillator frequency
with on-chip oscillator: frequency of
the crystal quartz
Hz
with external clock: frequency of the
signal applied at OSC1
Hz
fCLKOUT
clock output frequency
1
2fosc
Hz
fcr
carrier frequency/digital filter tuning
frequency
1
64fosc
Hz
tsu
set-up time of the shaped burst
23/fcr or 1472/fosc
s
th
hold time of the shaped burst
23/fcr or 1472/fosc
s
tW(DI)(min)
minimum pulse width of DATA_IN
signal
tsu + 1/fcr
s
002aaf042
TDA5051A
7
5
OSC1
DGND
fosc
CLK_OUT
GND
MICROCONTROLLER
XTAL
002aaf043
TDA5051A
4
5
CLK_OUT
DGND
1/2 fosc
CLK_OUT
GND
MICROCONTROLLER
8
7
OSC2
OSC1
Rp
XTAL
C1
C2




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