SAA7740 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

SAA7740

Digital Audio Processing IC (DAPIC)

Philips Electronics 

Philips Semiconductors

Digital Audio Processing IC (DAPIC)

Product specification

SAA7740H

FEATURES

Hardware

• Two digital inputs and two digital outputs in the I2S-bus

format (i.e. 4 audio channels)

• Independent input/output interfaces

• Slave input/output interfaces

• Slave processing

• I2C-bus microcontroller interface

• DC filtering at the inputs

• One programmable 2nd-order digital filter unit

• Two multiply accumulate processor units

(24 × 16-bit/MAC)

• DRAM interface and address computation unit for

external delay lines

• On-chip coefficient and external delay line address

storage

• Hardware controlled soft mute via the MUTE pin

• Hardware controlled soft demute via the RST pin

• Operating ambient temperature; −40 to +85 °C.

Software

• 5-band parametric equalizer with selectable centre

frequency, slope setting and boost/cut gain settings

from −12 to +12 dB

• Stereo width control from mono to stereo to spatial

stereo

• Stereo Hall-effects for field acoustics, such as concert

halls, with 8 coefficients and 8 delayed taps per channel

• External delay line processing for delays up to 1 second

• Reverberation with selectable reverberation time (up to

5 seconds) and energy

• Three different surround sound programs to obtain a

spatial effect on 4 loudspeakers

• Passive DOLBY surround processing with the addition

of an external dynamic noise reduction IC

• Karaoke processing

• Dual 16th-order correction filtering

• Quad 8th-order correction filtering

• Digital volume and balance control

• Soft controlled soft mute/demute via the microcontroller

interface

• Input switching matrix

• Output rear and front switching matrix.

APPLICATIONS

• Digital amplifiers

• Audio combination sets

• Car audio systems

• TV audio channels.

QUICK REFERENCE DATA

SYMBOL

VDD(tot)

IDD(tot)

fxtal

Ptot

Tamb

PARAMETER

CONDITIONS

total DC supply voltage

total DC supply current

input crystal frequency

all VDD pins

fxtal = 16.9344 MHz

total power dissipation

fxtal = 16.9344 MHz

operating ambient temperature

MIN.

4.5

−

12.288

−

−40

TYP. MAX.

5.0

5.5

60

−

16.9344 23.0

0.3

−

−

+85

UNIT

V

mA

MHz

W

°C

ORDERING INFORMATION

TYPE

NUMBER

SAA7740H

NAME

QFP64

PACKAGE

DESCRIPTION

plastic quad flat package; 64 leads (lead length 1.95 mm); body

14 × 20 × 2.8 mm

VERSION

SOT319-2

1997 May 30

2

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