SAA7824 datasheet(74/89 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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74 / 89 page

2003 Oct 01

74

Philips Semiconductors

Product speciﬁcation

CD audio decoder, digital servo and ﬁlterless

DAC with integrated pre-amp and laser control

SAA7824

11 OPERATING CHARACTERISTICS (SUBCODE INTERFACE TIMING)

VDDD = 1.65 to 1.95 V; VSS =0V; Tamb = 0 to 70 °C; unless otherwise speciﬁed.

Note

1. In the normal operating mode the subcode timing is directly related to the overspeed factor ‘n’. In the lock-to-disc

mode ‘n’ is replaced by the disc speed factor ‘d’,

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Subcode interface timing (single speed

× n); see Fig.34; note 1

INPUT: PIN RCK

tCLKH

input clock HIGH time

2/n

4/n

6/n

µs

tCLKL

input clock LOW time

2/n

4/n

6/n

µs

tr

input clock rise time

−−

80/n

ns

tf

input clock fall time

−−

80/n

ns

td(SFSY-RCK)

delay time SFSY to RCK

10/n

−

20/n

µs

OUTPUTS: PINS SBSY, SFSY AND SUB (CL = 20 pF)

Tcy(block)

block cycle time

12.0/n

13.3/n

14.7/n

ms

tW(SBSY)

SBSY pulse width

−−

300/n

µs

Tcy(frame)

frame cycle time

122/n

136/n

150/n

µs

tW(SFSY)

SFSY pulse width

3-wire mode

−−

366/n

µs

tSFSYH

SFSY HIGH time

−−

66/n

µs

tSFSYL

SFSY LOW time

−−

84/n

µs

td(SFSY-SUB)

delay time SFSY to SUB

(P data) valid

−−

1/n

µs

td(RCK-SUB)

delay time RCK falling to

SUB

−−

0

µs

th(RCK-SUB)

hold time RCK to SUB

−−

0.7/n

µs

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