MB509 Datasheet, PDF (4/9 Pages) Fujitsu Component Limited. – TWO MODULUS PRESCALER WITH STAND-BY MODE

MB509
Sampling scope input point
for input waveform
C₁
P.G.
50Ω
C₂
V_CC
IN
SW
OUT
IN
MC
GND
V_CC = +5.0V + 10%
C₃
Sampling scope prober point
for output waveform
C_L
MC Input
C₁ : 1000pF
C₂ : 1000pF
C₃ : 0.1µF
C_L : 8pF (including scope and jig capacitance)
PS pin is open.
Figure 2. Test Circuit
TIMING CHART (2 MODULUS)
Example: Divide ratio = 64/65
64
65
IN
32
32
OUT
32 32 32 32
32
33
32 32 33 32 33 32 32
MC
t_SET
t_SET
Note: When divide ratio of 65 is selected, positive pulse is added by one to 33.
The typical set up time is 16ns from the MC signal input to the timing of change of prescaler divide ratio.
4