SAA7740 datasheet(2/28 Pages) PHILIPS

2 / 28 page

1997 May 30

Philips Semiconductors

Product speciﬁcation

Digital Audio Processing IC (DAPIC)

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

ORDERING INFORMATION

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

VDD(tot)

total DC supply voltage

all VDD pins

4.5

5.0

5.5

IDD(tot)

total DC supply current

fxtal = 16.9344 MHz

−

fxtal

input crystal frequency

12.288

16.9344

23.0

MHz

Ptot

total power dissipation

fxtal = 16.9344 MHz

−

0.3

−

Tamb

operating ambient temperature

−40

−

+85

°C

TYPE

NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

SAA7740H

QFP64

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

× 20 × 2.8 mm

SOT319-2

SAA7740 Datasheet(PDF) 2 Page - NXP Semiconductors

SAA7740 Datasheet(HTML) 2 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

Datasheet Download

Link URL