Philips TSA5055T Datasheet
INTEGRATED CIRCUITS
DATA SH EET
TSA5055T
2.5 GHz bi-directional I
controlled synthesizer
Product specification
File under Integrated Circuits, IC02
2
C-bus
November 1991
Philips Semiconductors Product specification
2.5 GHz bi-directional I2C-bus controlled synthesizer
GENERAL DESCRIPTION
The TSA5055T is a single chip PLL
frequency synthesizer designed for
satellite TV tuning systems. Control
data is entered via the I2C-bus; five
serial bytes are required to address
the device, select the oscillator
frequency, program the six output
ports and set the charge-pump
current. Four of these ports can also
be used as input ports (3 general
purpose I/O ports, one A/D
converter). Digital information
concerning these ports can be read
out of the TSA5055T on the SDA line
(one status byte) during a READ
operation. A flag is set when the loop
is “in-lock” and is read during a READ
operation. The device has one fixed
I2C-bus address and 3 programmable
addresses, programmed by applying
a specific voltage to port 3. The phase
comparator operates at 7.8125 kHz
when a 4 MHz crystal is used.
FEATURES
• Complete 2.5 GHz single-chip
system
• Low power 5 V, 60 mA
2
• I
C-bus programming
• In-lock flag
• Varicap drive disable
• Low radiation
• 5-level A/D converter
• Address selection for
Picture-In-Picture (PIP), DBS
tuner, etc.
TSA5055T
• 6 controllable outputs,
4 bi-directional
• Power-down flag
• Available in SOT109A package
APPLICATIONS
• Satellite TV
• High IF cable tuning systems
QUICK REFERENCE DATA
SYMBOL PARAMETER MIN. TYP. MAX. UNIT
V
CC
I
CC
supply voltage 4.75 5 5.5 V
supply current − 60 80 mA
∆f frequency range 1 − 2.5 GHz
V
I (RMS)
input voltage level (RMS value)
1 GHz to 1.8 GHz 50 − 300 mV
1.8 GHz to 2.6 GHz 70 − 300 mV
f
XTAL
I
O
crystal oscillator 3.2 4 4.48 MHz
open−collector output current
P7, P6, P5, P4 −−10 mA
output current
P3, P0 − 1 − mA
T
T
R
amb
stg
th j-a
operating ambient temperature range −10 − 70 °C
storage temperature range −40 − 125 °C
thermal resistance − 110 − K/W
ORDERING INFORMATION
EXTENDED
TYPE NUMBER
PINS PIN POSITION MATERIAL CODE
TSA5055T 16 SO PLASTIC SOT109A
PACKAGE
(1)
Note
1. SOT109-1; 1996 December 5.
November 1991 2
Philips Semiconductors Product specification
2.5 GHz bi-directional I2C-bus controlled
synthesizer
TSA5055T
November 1991 3
Fig.1 Block diagram.
Philips Semiconductors Product specification
2.5 GHz bi-directional I2C-bus controlled synthesizer
TSA5055T
LIMITING VALUES
In accordance with Absolute Maximum System (IEC 134).
SYMBOL PARAMETER MIN. MAX. UNIT
V
CC
V
P1
V
P2
V
P4
V
P5
V
P6
V
P13
V
P16
I
6L
I
4L
T
stg
T
j
supply voltage −0.3 6 V
charge-pump output voltage −0.3 V
crystal (Q1) input voltage −0.3 V
CC
CC
serial data input/output −0.3 6 V
serial clock input −0.3 6 V
input/output ports P7 - P0 −316V
prescaler inputs −0.3 2.5 V
drive output −0.3 V
CC
output ports P7 - P4 (open collector) −115mA
SDA output (open collector) −15 mA
storage temperature range −40 125 °C
junction temperature − 150 °C
THERMAL RESISTANCE
V
V
V
SYMBOL PARAMETER THERMAL RESISTANCE
R
th j-a
from junction to ambient in free air 110 K/W
HANDLING
Every pin withstands the ESD test in accordance with MIL-STD-883C, category A (1000 V).
November 1991 4
Philips Semiconductors Product specification
2.5 GHz bi-directional I2C-bus controlled synthesizer
PINNING
SYMBOL PIN DESCRIPTION
PD 1 charge-pump output
Q1 2 crystal oscillator input 1
Q2 3 crystal oscillator input 2
SDA 4 serial data input/output
SCL 5 serial clock input
P7 6 port output/input (general purpose)
P6 7 port output/input (A/D converter)
P5 8 port output/input (general purpose)
P4 9 port output/input (general purpose)
P3 10 port output/input (address selection)
P0 11 port output
V
CC
RF
IN1
RF
IN2
GND 15 ground
UD 16 drive output
12 voltage supply
13 UHF/VHF signal input 1
14 UHF/VHF signal input 2 (decoupled)
TSA5055T
Fig.2 Pinning diagram.
FUNCTIONAL DESCRIPTION
The TSA5055T 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 needed to fully
program the TSA5055T. The bus transceiver has an
auto-increment facility that permits the programming of the
TSA5055T within one single transmission
(address + 4 data bytes).
The TSA5055T can also be partly 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
2
C-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. 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 the UHF/VHF signal is first divided by
16, the step size is 125 kHz. A 3.2 MHz crystal can offer a
step size of 100 kHz.
November 1991 5
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