ICS844256 Datasheet, PDF (8/13 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS844256
FEMTOCLOCKS™ CRYSTAL-TO-LVDS
FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER
PARAMETER MEASUREMENT INFORMATION
3.3V
2.5V
3.3V±5%
POWER SUPPLY
+ Float GND -
LVDS
Qx ^SCOPE
nQx
LVDS
SCOPE
Qx
nQx
++ –
POWER
SUPPLY
Float GND
3.3V OUTPUT LOAD AC TEST CIRCUIT
3.3V/2.5V OUTPUT LOAD AC TEST CIRCUIT
nQx
Qx
nQy
Qy
t sk(o)
OUTPUT SKEW
Clock
20%
Outputs
80%
t_R
80%
t_F
nQ0:nQ5
Q0:Q5
t _PW
t
PERIOD
odc = ^{t PW} x 100%
t _PERIOD
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
V_DD
out
V_SWING ^{DC Input LVDS}
20%
out
➤
V_OS/Δ V_OS
OUTPUT RISE/FALL TIME
V_DD
DC Input LVDS
OFFSET VOLTAGE SETUP
out
➤
100
V_OD/Δ V_OD
out
DIFFERENTIAL OUTPUT VOLTAGE SETUP
844256AM
www.icst.com/products/hiperclocks.html
8
REV. A NOVEMBER 29, 2005