Philips Semiconductors
Product specification
1.4 GHz I
2
C-bus controlled multimedia
synthesizer
FEATURES
•
Complete 1.4 GHz single-chip system
•
Adaptive DC/DC converter driver output
•
On-board tuning amplifier output
•
Varicap drive disable
•
Four NPN open-collector output ports (10 mA)
•
Four bus-controlled bidirectional ports
(NPN open-collector outputs)
•
In-lock detector
•
5-step Analog-to-Digital Converter (ADC)
•
Mixer/Oscillator (M/O) band-switch output
•
15-bit programmable divider
•
Programmable reference divider ratio
(512, 640 or 1024)
•
Programmable charge-pump current (50 or 250
µA)
•
I
2
C-bus format
– Address plus four data bytes transmission
(write mode)
– Address plus one status byte transmission
(read mode)
– Four independent addresses
•
Low power, low radiation.
GENERAL DESCRIPTION
The device is a single chip PLL frequency synthesizer
designed for TV and VCR tuning systems. The circuit
consists of a divide-by-eight prescaler with its own
preamplifier, a 15-bit programmable divider, a crystal
oscillator and its programmable reference divider, a
phase/frequency detector combined with a charge-pump
which drives the tuning amplifier, including 33 V output.
Three NPN open-collector outputs are provided for band
switching together with five open-collector NPN outputs.
Four of these ports can also be used as input ports
(one ADC and three general purpose I/O ports).
ORDERING INFORMATION
TYPE
NUMBER
TSA5523M/C1
PACKAGE
NAME
SSOP20
DESCRIPTION
plastic shrink small outline package; 20 leads; body width 4.4 mm
TSA5523M
An output is provided to control a Philips mixer/oscillator IC
controlled by bits P7, P5 and P4. Depending on the
reference divider ratio (512, 640 or 1024), the phase
comparator operates at 3.90625, 6.25 or 7.8125 kHz with
a 4 MHz crystal.
The lock detector bit FL is set to logic 1 when the loop is
locked and is read on the SDA line (status byte) during a
read operation. The ADC is available for digital AFC
control. The ADC code is read during a read operation on
the I
2
C-bus. The ADC input is combined with the port P6.
In the test mode, this port is also used as a test output for
f
ref
and f
div/2
(see Table 4). In addition, the circuit includes
a DC/DC converter driver connected to the IDC pin to
control the amplitude of an external oscillator followed by
a voltage rectifier.
The voltage rectifier is used to generate the correct tuning
supply voltage to maintain a constant current into the
tuning amplifier. The DC/DC converter driver can be
disabled by setting the IDC pin to V
CC1
in this event the
tuning supply voltage is delivered by a fixed 33 V supply.
Five serial bytes (including address byte) are required to
address the device, select the VCO frequency, program
the ports, set the charge-pump current and set the
reference divider ratio. The device has four independent
I
2
C-bus addresses which can be selected by applying a
specific voltage on the AS input (see Table 3).
APPLICATIONS
•
Multimedia TV tuners and front-ends
•
VCR tuners.
VERSION
SOT266-1
1996 Dec 17
2
Philips Semiconductors
Product specification
1.4 GHz I
2
C-bus controlled multimedia
synthesizer
PINNING
SYMBOL
XTAL
AS
SDA
SCL
P4
P5
P7
IDC
V
tune
CP
P0
P1
P2
P3
P6
GND
BS
RF2
RF1
V
CC1
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
DESCRIPTION
crystal oscillator input
address selection input
serial data input/output
serial clock input
Port 4 NPN open-collector
band-switch output
Port 5 NPN open-collector
band-switch output
Port 7 NPN open-collector
band-switch output
DC/DC converter control I/O
terminal
tuning voltage output
NPN open-collector I/O port
Port 0 NPN open-collector I/O port
Port 1 NPN open-collector I/O port
Port 2 NPN open-collector I/O port
Port 3 NPN open-collector output
Port 6 NPN open-collector
output/ADC input
ground
band-switch output to
mixer/oscillator driver
RF signal input 2
RF signal input 1
supply voltage (+5 V)
P7 7
IDC 8
Vtune 9
CP 10
MGG746
TSA5523M
handbook, halfpage
XTAL 1
AS 2
SDA 3
SCL 4
P4 5
20 VCC1
19 RF1
18 RF2
17 BS
16 GND
TSA5523M
P5 6
15 P6
14 P3
13 P2
12 P1
11 P0
Fig.2 Pin configuration.
1996 Dec 17
5
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