TEA5777 NXP Semiconductors, TEA5777 Datasheet - Page 10

• Manufacturer Part Number: TEA5777
• Manufacturer: NXP Semiconductors

Specifications of TEA5777

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Philips Semiconductors
8. Functional description
TEA5777_1
Product data sheet
The TEA5777 is an integrated AM/FM stereo radio circuit with very high integration level
including digital tuning and control functions.
The IC communicates with a microcontroller via the I
and provides the following functions:
The AM circuit incorporates:
The FM circuit incorporates:
The stereo decoder incorporates:
Tuning function:
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AM single conversion receiver with integrated image rejection for f
FM single conversion receiver with integrated image rejection for f
150 kHz (software selectable)
FM stereo decoder with signal dependent stereo effect
Integrated antenna tuning function
Integrated I/Q IF channel
On-chip image reject mixer structure
A fully integrated AM VCO with f
Software selectable high-side or low-side oscillator injection
A fully integrated AM detector
Integrated I/Q IF channel
On-chip image reject mixer structure
External RF VCO running at f
Software selectable high-side or low-side oscillator injection
A fully integrated demodulator
Japan band possibility
A 1.52 MHz VCO, that needs no external adjustment, which can lock to the 19 kHz
stereo pilot tone by means of a PLL system; the sub-carrier frequencies of 19 kHz,
38 kHz and others are regenerated from the VCO output
Integrated 50 s or 75 s (switchable) de-emphasis
Signal Dependent Stereo (SDS) function can be switched off via the bus interface
Stereo decoder can be switched off in order to save power
The tuning synthesizer is on-chip with the radio and utilizes a PLL system for tuning
and an IF counter has been added for search-stop detection
Tuning to a wanted input signal can be achieved by preset tuning or search tuning. For
the latter the IC has a built-in auto search function which reduces the load of the
microcontroller
Rev. 01 — 11 April 2006
Low-power AM/FM stereo radio for handheld applications
VCO
VCO
= 2
= 8
(f
RF
(f
RF
f
IF
+ f
)
2
IF
C-bus or the 3-wire bus interface
)
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
IF
IF
TEA5777
= 133.333 kHz or
= 21 kHz
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