SAA7824 datasheet(78/89 Pages) PHILIPS

Part #	SAA7824

Description	CD audio decoder, digital servo and filterless DAC with integrated pre-amp and laser control (PhonIC)

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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78 / 89 page

2003 Oct 01

78

Philips Semiconductors

Product speciﬁcation

CD audio decoder, digital servo and ﬁlterless

DAC with integrated pre-amp and laser control

SAA7824

Notes

1. The 4-wire bus mode microcontroller interface timing for writing to decoder registers 0 to F, and reading Q-channel

subcode and decoder status, is a function of the overspeed factor ‘n’. In the lock-to-disc mode the maximum data

rate is lower.

2. Negative set-up time means that the data may change after clock transition.

thCLR

hold time SILD to

SCL

830

−

830

−

ns

WRITE MODE (CL = 20 pF)

tsD

set-up time SDA to

SCL

0

−

0

−

ns

thD

hold time SCL to SDA

950

−

950

−

ns

tsCL

set-up time SCL to

SILD

480

−

480

−

ns

thCL

hold time SILD to

SCL

120

−

120

−

ns

tdPLP

delay between two

SILD pulses

70

−

70

−

ns

tdWZ

delay time SDA to

SILD high-impedance

0

−

0

−

ns

SYMBOL

PARAMETER

CONDITIONS

NORMAL MODE

LOCK-TO-DISC MODE

UNIT

MIN.

MAX.

MIN.

MAX.

SDA (SAA782X)

SCL

RAB

t r

DD

V

– 0.8 V

0.8 V

t r

t

f

t

f

DD

V

– 0.8 V

0.8 V

DD

V

– 0.8 V

0.8 V

t

PD

t

CL

t

CH

t dRD

t

dRZ

high-impedance

MBL451

Fig.36 4-wire microcontroller timing; read mode (Q-channel subcode and decoder status information).

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