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Very High Operating Speed
Operation down to DC with Square Wave Input
Low Phase Noise (Typically better than
-150dBc/Hz at 1kHz)
5V Single Supply Operation
Low Power Dissipation: 420mW (Typ)
Surface Mount Plastic Package With Exposed
Pad (See Application Notes
Issue 1
November 2002
Ordering Information
ZL40812/DCE (tubes)
8 lead e-pad SOIC
ZL40812/DCF (tape and reel) 8 lead e-pad SOIC
-40擄C to +85擄C
Description
Description The ZL40812 is one of a range of 5V
supply, very high speed low power prescalers for
professional applications with a fixed modulus of divide
by 16. The dividing elements are static D type flip flops
and therefore allow operation down to DC if the drive
signal is a pulse waveform with fast risetimes. The
output stage has internal 50 ohm pull up giving a 1V
p-p output. See application notes for more details.
Applications
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DC to 10 GHz PLL applications
HyperLan
LMDS
Instrumentation
Satellite Communications
Fibre Optic Communications; OC48, OC192
Ultra Low Jitter Clock Systems
VCC IN
1
VCC OUT
8
50R
7
6
OUTPUT
OUTPUT B
/16
400R
INPUT
INPUT B
2
3
4,5
GND
20mA
Figure 1 - Block Diagram
1
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