tsa5511t NXP Semiconductors, tsa5511t Datasheet - Page 6

• Manufacturer Part Number: tsa5511t
• Description: Bidirectional I2c-bus Controlled Synthesizer
• Manufacturer: NXP Semiconductors

Philips Semiconductors
PINNING
FUNCTIONAL DESCRIPTION
The TSA5511 is controlled via the two-wire I
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 TSA5511. The bus transceiver has an auto-increment facility which permits the programming of the
TSA5511 within one single transmission (address + 4 data bytes).
The TSA5511 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
I
device. This allows a smooth frequency sweep for fine tuning or AFC purposes. 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.
October 1992
2
PD
Q1
Q2
n.c.
SDA
SCL
P7
n.c.
P6
P5
P4
P3
P2
n.c.
P1
P0
V
RF
RF
V
UD
C-bus STOP condition is sent by the controller, additional data bytes can be entered without the need to re-address the
SYMBOL
CC
EE
1.3 GHz Bidirectional I
IN1
IN2
SOT102 SOT109 SOT163
10
12
13
14
15
16
17
18
11
1
2
3
4
5
6
7
8
9
PIN
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
2
C-bus controlled synthesizer
10
12
13
14
15
16
17
18
19
20
11
1
2
3
4
5
6
7
8
9
2
C-bus. For programming, there is one module address (7 bits) and the R/W
charge-pump output
crystal oscillator input 1
crystal oscillator reference voltage
not connected
serial data input/output
serial clock input
port output/input (general purpose)
not connected
port output/input for general purpose ADC
port output/input (general purpose)
port output/input (general purpose)
port output/input for address selection
port output
not connected
port output
port output
voltage supply
UHF/VHF signal input 1
UHF/VHF signal input 2 (decoupled)
ground
drive output
6
DESCRIPTION
Product specification
TSA5511