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TDA7553

DIGITAL SIGNAL PROCESSING IC FOR SPEECH AND AUDIO APPLICATIONS

STMicroelectronics 

TDA7550/R TDA7551

®

TDA7552 TDA7553

DIGITAL SIGNAL PROCESSING IC FOR SPEECH AND

AUDIO APPLICATIONS

PRODUCT PREVIEW

24-BIT, FIXED POINT, 50 MIPS DSP CORE

LARGE ON-BOARD PROGRAM ROM AND

DATA RAM (UP TO 16Kw ROM/RAM AND

16Kw RAM)

INTEGRATED STEREO A/D AND D/A, 16-BIT

SIGMA-DELTA

PROGRAMMABLE CODEC SAMPLE RATE

FROM 4 TO 48 kHz

ON-BOARD PLL FOR CORE CLOCK AND

CONVERTERS

MANAGEMENT

OF

EXTERNAL

FLASH/SRAM/DRAM MEMORY BANK

I2C OR SPI SERIAL INTERFACE FOR EX-

TERNAL CONTROL

80-PIN TQFP, 0.65 mm PITCH

AUTOMOTIVE GRADE (FROM -40° C to

+85°C)

DESCRIPTION

The TDA755X family is a high performances, fully

programmable 24-bit, 50 MIPS Digital Signal

BLOCK DIAGRAM

TQFP80

Processor (DSP), designed to support several

speech and audio applications, as Automatic

Speech Recognition, Speech Synthesis, Speaker

Verification, Echo and Noise Cancellation. Soft-

ware for these applications is licenced by Lernout

& Hauspie and NCTI.

It offers an effective solution for this kind of appli-

cations because of the A/D and D/A converters

and the big amount of memory integrated on chip.

MULTIPLEXED BUS

I2C/SPI

FLASH

PORT

INTERFACE

SAI

ROM/RAM

RAM

8

FLAGS

DSP

CORE

PLL

L

DAC

R

L

ADC

R

ANALOG OUT

ANALOG IN

D99AU1020A

September 1999

This is preliminary information on a new product now in development. Details are subject to change without notice.

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