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TSA5521M/C4 データシートの表示(PDF) - Philips Electronics

部品番号TSA5521M/C4 Philips
Philips Electronics Philips
コンポーネント説明1.3 GHz universal bus-controlled TV synthesizer; 3-wire


TSA5521M/C4 Datasheet PDF : 24 Pages
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Philips Semiconductors
1.3 GHz universal bus-controlled
TV synthesizer
Product specification
TSA5520; TSA5521
APPLICATION INFORMATION
Tuning amplifier
The tuning amplifier is capable of driving the varicap
voltage without an external transistor. The tuning voltage
output must be connected to an external load of 27 k
which is connected to the tuning voltage supply rail.
Figures 11 and 12 show a possible loop filter.
The component values depend on the oscillator
characteristics and the selected reference frequency.
Crystal oscillator
The crystal oscillator uses a 4 MHz crystal connected in
series with an 18 pF capacitor thereby operating in the
series resonance mode. Connecting the oscillator to the
supply voltage is preferred but it can, however, also be
connected to ground.
Examples of I2C-bus sequences (SW = LOW)
Tables 8 to 12 show the various sequences where fosc = 100 MHz, BS4 = ON, ICP = 280 µA, N = 512, fxtal = 4 MHz,
S = START, A = acknowledge and P = STOP. The sequence is as follows:
START + address byte + divider byte 1 + divider byte 2 + control byte + band switch byte + STOP.
For the complete sequence see Table 8 (sequence 1) or Table 9 (sequence 2).
Table 8 Complete sequence 1
S
C2
A
06
A
40
A
CE
A
08
A
P
Table 9 Complete sequence 2
S
C2
A
CE
A
08
A
06
A
40
A
P
Table 10 Divider bytes only sequence
S
C2
A
06
A
40
A
P
Table 11 Control and band switch bytes only sequence
S
C2
A
CE
A
08
A
P
Table 12 Control byte only sequence
S
C2
A
CE
A
P
Other I2C-bus sequences are not allowed. Other I2C-bus addresses may be selected by applying an appropriate voltage
to the CE input.
Examples of 3-wire bus sequences (TSA5520; SW = OPEN)
Table 13 18-bit sequence (fosc = 800 MHz, BS4 = ON)
100011001000000000
Table 14 19-bit sequence (fosc = 650 MHz, BS3 = ON)
0100101000101000000
The reference divider is automatically set to 512 unless RSB has been programmed to 0 during a 27-bit sequence.
1996 Oct 10
16
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The device is a single-chip PLL frequency synthesizer designed for TV and VCR tuning systems.

The circuit consists of a divide-by-eight prescaler with its own preamplifier, a 15-bit programmable divider, a crystal oscillator and its programmable reference divider and a phase/frequency detector combined with a charge-pump which drives the tuning amplifier and the 33 V output.

Four high-current PNP band switch buffers are provided for band switching. Two PNP buffers can be switched on simultaneously. The sum of the collector currents is limited to 50 mA.

 

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