SAA7370 Datasheet, PDF (3/60 Pages) NXP Semiconductors – Digital servo processor and Compact Disc decoder CD7

Philips Semiconductors
Digital servo processor and
Compact Disc decoder (CD7)
Product specification
SAA7370
1 FEATURES
• CD ROM mode
• Up to 4 times-speed mode
• Lock-to-disc mode
• Full error correction strategy, t = 2 and e = 4
• Full CD graphics interface
• All standard decoder functions implemented digitally on
chip
• FIFO overflow concealment for rotational shock
resistance
• Digital audio interface (EBU), audio and data
• 2 and 4 times oversampling integrated digital filter,
including f_s mode
• Audio data peak level detection
• Kill interface for DAC deactivation during digital silence
• All TDA1301 (DSIC2) digital servo functions, plus extra
high-level functions
• Low focus noise
• Improved playability on ABEX TCD-721R, TCD-725 and
TCD-714 discs
• Automatic closed loop gain control available for focus
and radial loops
• Pulsed sledge support
• Up to 80 kHz jump performance
• Electronic damping of fast radial actuator during long
jump
• Microcontroller loading LOW
• High-level servo control option
• High-level mechanism monitor
• Communication may be via TDA1301/SAA7345
compatible bus or I²C-bus
• On-chip clock multiplier allows the use of 8.4672 MHz
crystal.
2 GENERAL DESCRIPTION
The SAA7370 (CD7) is a single chip combining the
functions of a CD decoder IC and digital servo IC.
The decoder part is based on the SAA7345 (CD6) with an
improved error correction strategy. The servo part is based
on the TDA1301T (DSIC2) with improvements
incorporated, extra features have also been added.
Supply of this Compact Disc IC does not convey an implied
license under any patent right to use this IC in any
Compact Disc application.
3 QUICK REFERENCE DATA
SYMBOL
V_DD
I_DD
f_xtal
T_amb
T_stg
PARAMETER
supply voltage
supply current
crystal frequency
operating ambient temperature
storage temperature
CONDITIONS MIN.
4.75
n = 1 mode −
8
0
−55
TYP.
5.0
49
8.4672
−
−
MAX.
5.25
−
35
+70
+125
UNIT
V
mA
MHz
°C
°C
4 ORDERING INFORMATION
TYPE NUMBER
SAA7370
NAME
QFP64
PACKAGE
DESCRIPTION
plastic quad flat package; 64 leads (lead length 1.6 mm);
body 14 × 14 × 2.7 mm
VERSION
SOT393-1
1998 Feb 26
3