tsa5518m NXP Semiconductors, tsa5518m Datasheet - Page 4

• Manufacturer Part Number: tsa5518m
• Description: 1.3 Ghz Bidirectional I2c-bus Controlled Synthesizer
• Manufacturer: NXP Semiconductors

Philips Semiconductors
PINNING
FUNCTIONAL DESCRIPTION
The device is controlled via the two wire I
For programming, there is one module address (7 bits)
and the R/W bit for selecting READ or WRITE mode.
Write mode
The write data format is summarized in Table 1. After the
address transmission (first byte), data bytes can be sent to
the device. Four data bytes are needed to fully program
the device. The bus transceiver has an auto increment
facility which permits the programming of the device within
one single transmission (address byte + 4 data bytes).
The device can also be partially programmed on the
condition that the first data byte following the address is
byte 2 or 4. The meaning of the bits in the data bytes is
given in Table 3. The first bit of the first data byte
transmitted indicates whether frequency data (first bit = 0)
1997 Mar 07
UD
P7
P5
P4
BS
n.c
RF2
RF1
GND
P1
P0
AS
P6
P2
SDA
SCL
V
n.c
XTAL
PD
SYMBOL
CC
1.3 GHz bidirectional I
synthesizer
PIN
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
drive output (UD)
P7 output port
P5 output port
P4 output port
bandswitch output for M/O drive
not connected
UHF/VHF signal input 2
UHF/VHF signal input 1
ground
P1 output port (general purpose)
P0 output port (general purpose)
input for Address Selection
P6 port (output/input for general
purpose ADC)
P2 output port (f
is active)
I
I
voltage supply
not connected
crystal oscillator input
charge-pump output (PD)
2
2
C-bus serial data input/output
C-bus serial clock
DESCRIPTION
2
C-bus controlled
DIV
if the test mode
2
C-bus.
4
or charge pump and port information (first bit = 1) will
follow. Until an I
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
(open-collector outputs) or at the HIGH level (emitter
follower outputs). The bandswitch output BS provides a
voltage output suitable for the band selection input of
mixer/oscillator ICs TDA5330, TDA5630A and TDA5730.
It is controlled by B1 and B0 bits or P7, P5 and P4 bits
depending on the BSC bit (see Tables 1 to 4). 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 size of
50 kHz.
handbook, halfpage
GND
RF2
RF1
2
n.c.
UD
BS
Fig.2 Pin configuration.
C-bus STOP condition is sent by the
P7
P5
P4
P1
10
1
2
3
4
5
6
7
8
9
TSA5518M
MBH947
20
19
18
17
16
15
14
13
12
11
Product specification
TSA5518M
PD
XTAL
n.c.
V CC
SCL
SDA
P2
P6
AS
P0