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TSA5512M датащи(PDF) 6 Page - NXP Semiconductors

номер детали TSA5512M
подробное описание детали  1.3 GHz Bidirectional I2C-bus controlled synthesizer
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производитель  PHILIPS [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

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October 1992
6
Philips Semiconductors
Product specification
1.3 GHz Bidirectional I2C-bus controlled synthesizer
TSA5512
PINNING
FUNCTIONAL DESCRIPTION
The TSA5512 is controlled via the two-wire I2C-bus. For programming, there is one module address (7 bits) and the R/W
bit for selecting READ or WRITE mode.
WRITE mode: R/W = 0 (see Table 1)
After the address transmission (first byte), data bytes can be sent to the device. Four data bytes are required to fully
program the TSA5512. The bus transceiver has an auto-increment facility which permits the programming of the
TSA5512 within one single transmission (address + 4 data bytes).
The TSA5512 can also be partially programmed on the condition that the first data byte following the address is byte 2
or byte 4. The meaning of the bits in the data bytes is given in Table 1. The first bit of the first data byte transmitted
indicates whether frequency data (first bit = 0) or charge pump and port information (first bit = 1) will follow. Until an
I2C-bus STOP condition is sent by the controller, additional data bytes can be entered without the need to re-address the
device. This allows a smooth frequency sweep for fine tuning or AFC purpose. At power-on the ports are set to the high
impedance state.
The 7.8125 kHz reference frequency is obtained by dividing the output of the 4 MHz crystal oscillator by 512.
Because the input of UHF/VHF signal is first divided by 8 the step size is 62.5 kHz. A 3.2 MHz crystal can offer step sizes
of 50 kHz.
SYMBOL
PIN
DESCRIPTION
SOT102
SOT109
SOT163
SOT266
PD
1
1
1
charge-pump output
Q1
2
2
2
crystal oscillator input 1
Q2
3
3
3
crystal oscillator reference voltage
n.c.
−−
4
not connected
SDA
4
4
5
serial data input/output
SCL
5
5
6
serial clock input
P7
6
6
7
port output/input (general purpose)
n.c.
−−
8
not connected
P6
7
7
9
port output/input for general purpose ADC
P5
8
8
10
port output/input (general purpose)
P4
9
9
11
port output/input (general purpose)
P3
10
10
12
port output/input for address selection
P2
11
11
13
port output
P1
12
14
port output
P0
13
15
port output
VCC
14
12
16
voltage supply
RFIN1
15
13
17
UHF/VHF signal input 1
RFIN2
16
14
18
UHF/VHF signal input 2 (decoupled)
VEE
17
15
19
ground
UD
18
16
20
drive output


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