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TSA5055T

2.65 GHz bidirectional I2C-bus controlled synthesizer

Philips Electronics 

Philips Semiconductors

2.65 GHz bidirectional I2C-bus controlled

synthesizer

Product specification

TSA5055T

FEATURES

• Complete 2.65 GHz single-chip system

• Low power 5 V, 60 mA

• I2C-bus programming

• In-lock flag

• Varicap drive disable

• Low radiation

• 5-level Analog to Digital Converter (ADC)

• Address selection for Picture-In-Picture (PIP),

DBS tuner, etc.

• 6 controllable outputs, 4 bidirectional

• Power-down flag

• Available in SOT109-1 (SO16) package

• Symmetrical or asymmetrical drive.

APPLICATIONS

• Satellite TV

• High IF cable tuning systems.

GENERAL DESCRIPTION

The TSA5055T is a single-chip PLL frequency synthesizer

designed for satellite TV tuning systems. It may be used

with a symmetrical input (pins 13 and 14) or with an

asymmetrical input (pin 13).

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 (three general purpose I/O ports, one ADC).

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 three 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.

QUICK REFERENCE DATA

SYMBOL

VCC

ICC

fRF

VI (rms)

fXTAL

zXTAL

IO

Tamb

Tstg

PARAMETER

supply voltage

supply current

RF input frequency range

input voltage level (RMS value)

1 to 1.8 GHz

1.8 to 2.65 GHz

crystal oscillator frequency

crystal oscillator impedance (absolute value)

open-collector output current P7, P6, P5 and P4

output current P3 and P0

ambient temperature

storage temperature

MIN.

4.5

−

1

TYP.

5

60

−

MAX.

5.5

80

2.65

UNIT

V

mA

GHz

50

−

300

mV

70

−

300

mV

3.2

4

4.48

MHz

600

1 000

−

Ω

−

−

10

mA

−

1

−

mA

−20

−

+85

°C

−40

−

+150

°C

ORDERING INFORMATION

TYPE NUMBER

TSA5055T

NAME

SO16

PACKAGE

DESCRIPTION

plastic small outline package; 16 leads; body width 3.9 mm

CODE

SOT109-1

1999 Aug 11

2

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