SAA7374 查看數據表（PDF） - Philips Electronics
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SAA7374 Datasheet PDF : 60 Pages
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Philips Semiconductors
Low voltage digital servo processor and
Compact Disc decoder (CD7LV)
Product specification
SAA7374
12 OPERATING CHARACTERISTICS (MICROCONTROLLER INTERFACE TIMING)
VDD = 3.0 to 3.6 V; VSS = 0 V; Tamb = −10 to +70 °C; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
NORMAL MODE
MIN.
MAX.
LOCK-TO-DISC MODE
UNIT
MIN.
MAX.
Microcontroller interface timing (4-wire bus mode; writing to registers 0 to F; reading Q-channel subcode and
decoder status); see Figs 33 and 34; note 1.
INPUTS SCL AND RAB
tCL
input LOW time
tCH
input HIGH time
tr
rise time
tf
fall time
READ MODE (CL = 20 pF)
tdRD
delay time RAB to SDA
valid
tPD
propagation delay SCL
to SDA
tdRZ
delay time RAB to SDA
high-impedance
WRITE MODE (CL = 20 pF)
tsuD
set-up time SDA to
SCL
note 2
thD
tsuCR
hold time SCL to SDA
set-up time SCL to
RAB
tdWZ
delay time SDA
high-impedance to
RAB
480/n + 20 −
2400/n + 20 −
ns
480/n + 20 −
2400/n + 20 −
ns
−
480/n
−
480/n
ns
−
480/n
−
480/n
ns
−
50
−
50
ns
720/n − 20 960/n + 20 720/n + 20 4800/n + 20 ns
−
50
−
50
ns
20 − 720/n −
20 − 720/n −
ns
−
960/n + 20 -
4800/n + 20 ns
240/n + 20 −
1200/n + 20 −
ns
0
−
0
−
ns
Microcontroller interface timing (4-wire bus mode; servo commands); see Figs 35 and 36
INPUTS SCL AND SILD
tL
Input LOW time
tH
Input HIGH time
tr
rise time
tf
fall time
710
−
710
−
ns
710
−
710
−
ns
−
240
−
240
ns
−
240
−
240
ns
1998 Feb 26
51
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