ICS873990 Datasheet, PDF (8/16 Pages) Integrated Circuit Systems – LOW VOLTAGE, LVCMOS/ CRYSTAL-TO-LVPECL/ECL CLOCK GENERATOR

Integrated
Circuit
Systems, Inc.
ICS873990
LOW VOLTAGE, LVCMOS/
CRYSTAL-TO-LVPECL/ECL CLOCK GENERATOR
PARAMETER MEASUREMENT INFORMATION
2V
V_CC,
V ,V
CCA CCO
LVPECL
V_EE
-1.3V ± -0.165V
OUTPUT LOAD AC TEST CIRCUIT
TEST_CLK
nQFB,
nQAx:nQDx
QFB,
QAx:QDx
➤ ^t(Ø)
STATIC PHASE OFFSET
nQxx
Qxx
nQyy
Qyy
tsk(ω)
MULTIPLE FREQUENCY SKEW
SCOPE
nQx
Qx
Qx
nQy
nQx
Qy
t sk(o)
OUTPUT SKEW
nQFB,
V_OH nQAx:nQDx
V_OL
QFB,
QAx:QDx
V_OH
V_OL
tcycle n
➤
tcycle n+1
➤
tjit(cc) = tcycle n –tcycle n+1
1000 Cycles
CYCLE-TO-CYCLE JITTER
nQFB,
nQAx:nQDx
QFB,
QAx:QDx
t _PW
t
PERIOD
odc = ^{t PW} x 100%
t _PERIOD
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
Clock
20%
Outputs
80%
t_R
80%
t_F
V_{SW I N G}
20%
OUTPUT RISE/FALL TIME
873990AY
www.icst.com/products/hiperclocks.html
8
REV. B JUNE 13, 2005