SAA7740 データシートの表示（PDF） - Philips Electronics
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SAA7740 Datasheet PDF : 28 Pages
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Philips Semiconductors
Digital Audio Processing IC (DAPIC)
Product specification
SAA7740H
AC CHARACTERISTICS
VDDX = 5 V; Tamb = +25 °C; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
fxtal
αf
I59
g
Vxtal
CL
1⁄2Tclk
crystal input frequency
spurious frequency
attenuation
crystal current output
(pin 59)
transconductance at
maximum current
voltage across crystal
load capacitance
half clock period of
external clock
≥384fas
slave mode only
TIMING CHARACTERISTICS
SYMBOL
tHC
tLC
tr
tf
th1
tsu1
th2
tsu2
tacc
PARAMETER
pulse width HIGH, DIBCK and DOBCK
pulse width LOW, DIBCK and DOBCK
DIBCK and DOBCK rise time
DIBCK and DOBCK fall time
DIWS and DOWS hold time
DIWS and DOWS set-up time
DI1D and DI2D hold time
DI1D and DI2D set-up time
DO1D and DO2D access time
DRAM timing
1⁄2Tclk
tp;RAS
tW;RAS
tsu;RA
th;RA
tdRAS;CAS
th;CAS
th;RAS
tRAS;CA
thCA;RAS
thCA;RASp
tlCA;RAS
tpCAS;RAS
tsu;CA
half clock period
RAS precharge time
RAS pulse width
row address set-up time
row address hold time
RAS to CAS delay time
CAS hold time
RAS hold time
RAS to column address
column address hold time from RAS
column address hold time from RAS precharge
column address to RAS lead time
CAS to RAS precharge time
column address set-up time
1997 May 30
17
MIN.
12.288
20
TYP.
16.9344
−
MAX.
23.0
−
UNIT
MHz
dB
−
−
1
mA
−
0.4
−
mS
−
500
−
mV
−
−
15
pF
21
−
−
ns
MIN.
110
110
−
−
10
20
10
20
−
MAX.
−
−
20
20
−
−
−
−
25 + 0.5CL
(CL in pF)
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
21
−
ns
4 × 1⁄2Tclk − 12 −
ns
16 × 1⁄2Tclk − 12 −
ns
1⁄2Tclk − 8
−
ns
1⁄2Tclk − 12
−
ns
2 × 1⁄2Tclk − 11 2 × 1⁄2Tclk + 14 ns
4 × 1⁄2Tclk − 12 −
ns
2 × 1⁄2Tclk − 12 −
ns
−
1⁄2Tclk + 8
ns
5 × 1⁄2Tclk − 11 −
ns
1⁄2Tclk − 12
−
ns
3 × 1⁄2Tclk − 8
−
ns
4 × 1⁄2Tclk − 14 −
ns
1⁄2Tclk − 8
−
ns
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