ICS8525 Datasheet, PDF (3/12 Pages) Integrated Circuit Systems – LOW SKEW, 1-TO-4 LVCMOS-TO-LVHSTL FANOUT BUFFER

Integrated
Circuit
Systems, Inc.
ICS8525
LOW SKEW, 1-TO-4
LVCMOS-TO-LVHSTL FANOUT BUFFER
TABLE 3A. CONTROL INPUT FUNCTION TABLE
Inputs
Outputs
CLK_EN
CLK_SEL
Selected Source
Q0 thru Q3
nQ0 thru nQ3
0
0
CLK0
Disabled; LOW
Disabled; HIGH
0
1
CLK1
Disabled; LOW
Disabled; HIGH
1
0
CLK0
Enabled
Enabled
1
1
CLK1
Enabled
Enabled
After CLK_EN switches, the clock ooutputs are disabled or enabled following a rising and falling input clock edge
as shown in Figure 1.
In the active mode, the state of the outputs are a function of the CLK0 and CLK1 inputs as described in Table 3B.
CLK0, CLK1
Disabled
Enabled
CLK_EN
nQ0 - nQ3
Q0 - Q3
FIGURE 1 - CLK_EN TIMING DIAGRAM
TABLE 3B. CLOCK INPUT FUNCTION TABLE
Inputs
CLK0 or CLK1
0
1
Q0 thru Q3
LOW
HIGH
Outputs
nQ0 thru nQ3
HIGH
L OW
8525BG
www.icst.com/products/hiperclocks.html
3
REV. B JULY 27, 2001