SAA7157 Просмотр технического описания (PDF) - Philips Electronics
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SAA7157 Datasheet PDF : 12 Pages
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Philips Semiconductors
Clock signal generator circuit for digital TV
systems (SCGC)
Product specification
SAA7157
handbook, full pagewidth
VDDA
VDDD
power-on
LFCO
RESN
LL1.5A
LL1.5B
LL3A
LL3B
oscillation
td
normal
operation
oscillation disturbed
td
clock HIGH
during
internal reset
reset time
PLL lock-on
power failure
starts a new
reset procedure
Fig.4 Reset procedure.
+3.5 V
0V
normal
operation
MEH457
handbook, full pagewidth
1
2
16
19
MS
CE
LFCOSEL
LFCO2
VDDD
VSSD
11
LFCO
VDDD
7
10
14
15 LL1.5A
20 LL1.5B
LL3A
LL3B
CREF
VSSD
VDDD
12
RESN
May 1992
Fig.5 Internal circuit.
8
VSSD
MEH468
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