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TSA6057 View Datasheet(PDF) - Philips Electronics

Part Name
Description
Manufacturer
TSA6057
Philips
Philips Electronics Philips
TSA6057 Datasheet PDF : 20 Pages
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Philips Semiconductors
Radio tuning PLL frequency synthesizers
Product specification
TSA6057; TSA6057T
PINNING
SYMBOL PIN
DESCRIPTION
XTAL1
1 reference oscillator output
XTAL2
2 reference oscillator input
VCC1
VEE
FMI
DEC
3 positive supply voltage 1
4 ground
5 FM VCO input
6 prescaler decoupling
AMI
7 AM VCO input
BS
8 band switch output
fref
SDA
SCL
AS
9 40 kHz reference output
10 serial data input/output; I2C-bus
11 serial clock input; I2C-bus
12 address select input; I2C-bus
FMO
LOOPI
AMO
VCC2
13 FM output for external loop filter
14 tuning voltage amplifier input
15 AM output for external loop filter
16 positive supply voltage 2
handbook, halfpage
XTAL1 1
16 VCC2
XTAL2 2
15 AMO
VCC1 3
14 LOOPI
VEE 4 TSA6057 13 FMO
FMI 5 TSA6057T 12 AS
DEC 6
11 SCL
AMI 7
10 SDA
BS 8
9 fref
MGK760
Fig.2 Pinning diagram.
FUNCTIONAL DESCRIPTION
The TSA6057 contains the following parts and facilities:
Separate input amplifiers for the AM and
FM VCO-signals.
A prescaler with the divisors 3 : 4 on AM and 15 : 16 on
FM, a multiplexer to select AM or FM and a 4-bit.
programmable swallow counter.
A 13-bit programmable counter.
A digital memory phase detector.
A reference frequency channel comprised of a 4 MHz
crystal oscillator followed by a reference counter.
The reference frequency can be 1, 10 or 25 kHz and is
applied to the digital memory phase detector.
The reference counter also outputs a 40 kHz reference
frequency to pin 9 for co-operation with the FM/IF
system and microcomputer-based tuning interface IC
(TEA6100).
A programmable current amplifier (charge pump) which
consists of a 5 and a 450 µA current source. This allows
adjustment of loop gain, thus providing high current-high
speed tuning and low current-stable tuning.
A one input, two output tuning voltage amplifier.
One output is connected to the external AM loop filter
and the other output to the external FM loop filter. Under
software control, the AM output is switched to a high
impedance state by the FM/AM switch in the FM position
and the FM output is switched to a high impedance state
by the AM/FM switch in the AM position. The outputs
can deliver a tuning voltage of up to 10.5 V.
An I2C-bus interface with data latches and control logic.
The I2C-bus is intended for communication between
microcontrollers and different ICs or modules. Detailed
information on the I2C-bus specification is available on
request.
A software-controlled band switch output.
Controls
The TSA6057 is controlled via the 2-wire I2C-bus.
For programming there is one module address, a logic 0
R/W bit, a subaddress byte and four data bytes.
The subaddress determines which one of the four data
bytes is transmitted first. The module address contains a
programmable address bit (D1) which with address select
input AS (pin 12) makes it possible to operate two
TSA6057s in one system.
The auto increment facility of the I2C-bus allows
programming of the TSA6057 within one transmission
(address + subaddress + 4 data bytes).
The TSA6057 can also be partially programmed.
Transmission must then be ended by a STOP condition.
The bit organization of the 4 data bytes is shown in Fig.3
and described in Tables 1 to 5.
1997 Oct 29
5
 

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