ICS8344I-01
LOW SKEW, 1-TO-24 DIFFERENTIAL-TO-LVCMOS/LVTTL FANOUT BUFFER
PRELIMINARY
TABLE 3A. OUTPUT ENABLE FUNCTION TABLE
Banks 1, 2, 3
Inputs
Outputs
OE
CLK_EN
Q0-Q23
0
X
Hi-Z
1
0
Disabled in logic LOW state. NOTE 1
1
1
Enabled. NOTE 1
NOTE 1: The clock enable and disable function is synchronous to the falling
edge of the selected reference clock.
TABLE 3B. CLOCK SELECT FUNCTION TABLE
Control Input
CLK_SEL
0
1
CLK0, nCLK0
Selected
De-selected
Clock
CLK1, nCLK1
De-selected
Selected
TABLE 3C. CLOCK INPUT FUNCTION TABLE
Inputs
Outputs
Input to Output Mode
OE
CLK0, CLK1
nCLK0, nCLK1 Q0 thru Q23
Polarity
1
0
1
LOW
Differential to Single Ended
Non Inverting
1
1
0
HIGH
Differential to Single Ended
Non Inverting
1
0
Biased; NOTE 1
LOW
Single Ended to Differential
Non Inverting
1
1
Biased; NOTE 1
HIGH
Single Ended to Differential
Non Inverting
1
Biased; NOTE 1
0
HIGH
Single Ended to Differential
Inverting
1
Biased; NOTE 1
1
LOW
Single Ended to Differential
Inverting
NOTE 1: Please refer to the Application Information section on page 8, Figure 1, which discusses Wiring the Differential
Input to Accept Single-Ended Levels.
IDT™ / ICS™ LVCMOS/LVTTL FANOUT BUFFER
3
ICS8344AYI-01 REV. B MAY 10, 2007