sy55852u Micrel Semiconductor, sy55852u Datasheet - Page 3

• Manufacturer Part Number: sy55852u
• Description: Sy55852u D Flip-flop
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
Establishing Static Logic Inputs
through a 75k
pair is internally biased halfway between V
by a voltage divider consisting of two 75k
keep an input at static logic zero at V
inputs unconnected. For V
Note 1.
M9999-060407
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FUNCTIONAL DESCRIPTION
The true pin of an input pair is internally biased to ground
X is either D, CLK, R input. /X is either /D, /CLK, /R input.
Figure 1. Hard Wiring a Logic “1”
resistor. The complement pin of an input
V
NC
CC
X
/X
CC
CC
3.0V, connect the
> 3.0V, leave both
CC
resistors. To
(1)
and ground
3
complement inputs to V
unconnected. To make an input static logic one, connect
the true input to V
unconnected. These are the only safe ways to cause inputs
to be at a static value. In particular, no input pin should be
directly connected to ground. All NC (no connect) pins
should be unconnected.
Figure 2. Hard Wiring a Logic “0”
NC
NC
V
NC
CC
CC
, leave the complement input
X
/X
X
/X
CC
V
V
and leave the true inputs
CC
CC
> 3.0V
3.0V
(1)
SuperLite™
SY55852U