ICS853011 Datasheet, PDF (10/16 Pages) Integrated Circuit Systems – LOW SKEW, 1-TO-2 DIFFERENTIAL-TO-2.5V/3.3V LVPECL/ECL FANOUT BUFFER

Integrated
Circuit
Systems, Inc.
ICS853011
LOW SKEW, 1-TO-2
DIFFERENTIAL-TO-2.5V/3.3V LVPECL/ECL FANOUT BUFFER
RECOMMENDATIONS FOR UNUSED INPUT AND OUTPUT PINS
INPUTS:
CRYSTAL INPUT:
For applications not requiring the use of the crystal oscillator
input, both XTAL_IN and XTAL_OUT can be left floating. Though
not required, but for additional protection, a 1kΩ resister can be
tied from XTAL_IN to ground.
CLK INPUT:
For applications not requiring the use of the test clock, it can be
left floating. Though not required, but for additional protection, a
1kΩ resister can be tied from the CLK input to ground.
TEST_CLK INPUT:
For applications not requiring the use of the test clock, it can be
left floating. Though not required, but for additional protection, a
1kΩ resister can be tied from the TEST_CLK to ground.
CLK/nCLK INPUT:
For applications not requiring the use of the differential input,
both CLK and nCLK can be left floating. Though not required,
but for additional protection, a 1kΩ resister can be tied from CLK
to ground.
PCLK/nPCLK INPUT:
For applications not requiring the use of a differential input, both
the PCLK and nPCLK pins can be left floating. Though not
required, but for additional protection, a 1kΩ resister can be tied
from PCLK to ground.
OUTPUTS:
LVCMOS OUTPUT:
All unused LVCMOS output can be left floating. We recommend
that there is no trace attached.
LVPECL OUTPUT
All unused LVPECL outputs can be left floating. We recommend
that there is no trace attached. Both sides of the differential
output pair should either be left floating or terminated.
LVHSTL OUTPUT
All unused LVHSTL outputs can be left floating. We recommend
that there is no trace attached. Both sides of the differential
output pair should either be left floating or terminated.
LVDS OUTPUT
All unused LVDS outputs should be terminated with 100Ω resister
between the differential pair.
LVDS – Like OUTPUT
All unused LVDS outputs can be left floating. We recommend
that there is no trace attached. Both sides of the differential
output pair should either be left floating or terminated.
HCSL OUTPUT
All unused HCSL outputs can be left floating. We recommend
that there is no trace attached. Both sides of the differential
output pair should either be left floating or terminated.
SELECT PINS:
All select pins have internal pull-ups and pull-downs; additional
resistance is not required but can be added for additional
protection. A 1kΩ resister can be used.
SSTL OUTPUT
All unused SSTL outputs can be left floating. We recommend
that there is no trace attached. Both sides of the differential
output pair should either be left floating or terminated.
853011BM
www.icst.com/products/hiperclocks.html
10
REV. C JULY 13, 2005