ICS853S031I Data Sheet
LOW SKEW, 1-TO-9, DIFFERENTIAL-TO-2.5V, 3.3V LVPECL/ECL FANOUT BUFFER
Function Tables
Table 3A. Control Input Function Table
Inputs
Outputs
CLK_EN
CLK_SEL
Selected Sources
CLK, nCLK
Q0:Q8
Disabled:LOW
Disabled:LOW
Enabled
nQ0:nQ8
Disabled: HIGH
Disabled: HIGH
Enabled
0
0
1
1
0
1
0
1
PCLK, nPCLK
CLK, nCLK
PCLK, nPCLK
Enabled
Enabled
After CLK_EN switches, the clock outputs 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 CLK, nCLK and PCLK, nPCLK inputs as described in Table 3B.
Enabled
Disabled
nCLK, nPCLK
CLK, PCLK
CLK_EN
nQ[0:8]
Q[0:8]
Figure 1. CLK_EN Timing Diagram
Table 3B. Clock Input Function Table
Inputs
Outputs
Q0:Q8
CLK or PCLK
nCLK or nPCLK
nQ0:nQ8
HIGH
LOW
Input to Output Mode
Differential to Differential
Differential to Differential
Single-Ended to Differential
Single-Ended to Differential
Single-Ended to Differential
Single-Ended to Differential
Polarity
Non-Inverting
Non-Inverting
Non-Inverting
Non-Inverting
Inverting
0
1
LOW
HIGH
LOW
HIGH
HIGH
LOW
1
0
0
Biased; NOTE 1
HIGH
LOW
1
Biased; NOTE 1
Biased; NOTE 1
Biased; NOTE 1
0
1
LOW
HIGH
Inverting
Note 1: Please refer to the Applications Information, “Wiring the Differential Input to Accept Single Ended Levels”.
ICS853S031BYI REVISION A AUGUST 17, 2011
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©2011 Integrated Device Technology, Inc.