SY55851 Micrel Semiconductor, SY55851 Datasheet - Page 2

• Manufacturer Part Number: SY55851
• Description: 3GHz Anygate
• Manufacturer: Micrel Semiconductor

Micrel
A, /A – CML Input (Differential)
This is one of the differential inputs to the logic block.
For a 2-variable logic function, it is either a constant
value or a Boolean input. For a 2-input mux, this signal
represents the output when S is set to logic zero.
B, /B – CML Input (Differential)
This is one of the differential inputs to the logic block.
For a 2-variable logic function, it is either a constant
value or a Boolean input. For a 2-input mux, this signal
represents the output when S is set to logic one.
Establishing Static Logic Inputs
through a 75k
pair is internally biased to V
divider consisting of two 75k
functions necessitate an output to be connected to two
inputs, SY55851/A inputs have no internal terminations.
Typically, one resistor between the true and complement
input is all that is required, as per Figure 3. To keep an
NOTE:
1. Input is either A, B, S input, and /Input is either /A, /B, /S input.
PIN DESCRIPTIONS
FUNCTIONAL DESCRIPTION
The true pin of an input pair is internally biased to ground
Figure 1. Hard Wiring A Logic “1”
resistor. The complement pin of an input
V
NC
CC
Input
/Input
CC
/2 through an internal voltage
resistors. Since some logic
(1)
2
Q, /Q – CML Output (Differential)
This is the differential CML output for the logic block. For
termination guidelines, see Figure 3.
S, /S – CML Input (Differential)
This differential CML input is one of the inputs to the
logic block. It represents either one Boolean input for a
2-variable logic function, or the select input for a 2-input
mux.
input at static logic zero at V
unconnected or tie the complement input to V
3.0V applications, connect the complement input to V
and leave the true input unconnected. To make an input
static logic one, connect the true input to V
the complement input 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”
VCC
NC
NC
NC
For V
For V
Input
/Input
CC
Input
/Input
CC
> 3.0V Applications
< 3.0V Applications
CC
3.0V, leave both inputs
(1)
CC
CC
, and leave
SuperLite™
. For V
SY55851A
SY55851
CC
CC
<