ICS87972I Datasheet, PDF (9/17 Pages) Integrated Circuit Systems – LOW SKEW, 1-TO-12 LVCMOS CLOCK MULTIPLIER/ZERO DELAY BUFFER

ICS87972I
LOW SKEW, 1-TO-12
LVCMOS/LVTTL CLOCK MULTIPLIER/ZERO DELAY BUFFER
PARAMETER MEASUREMENT INFORMATION
1.65V±5%
V_DD,
V_DDA, V_DDO
LVCMOS
GND
-1.65V±5%
SCOPE
Qx
QA0:QA3,
QB0:QB3,
QC0:QC3,
QSYNC,
QFB
V
DDO
2
tcycle n
V
DDO
2
➤
tcycle n+1
V
DDO
2
➤
t jit(cc) = tcycle n –tcycle n+1
1000 Cycles
3.3V OUTPUT LOAD AC TEST CIRCUIT
CYCLE-TO-CYCLE JITTER
V
DDO
Qx
2
V
DDO
Qy
2
t sk(o)
OUTPUT SKEW
V_DD
CLK0,
2
CLK1
V_DD
EXT_FB
2
➤_t(Ø)
t(Ø) mean = Static Phase Offset
(where t(Ø) is any random sample, and t(Ø) mean is the average
of the sampled cycles measured on controlled edges)
STATIC PHASE OFFSET
0.5V
Clock
Outputs
2.4V
t_R
OUTPUT RISE/FALL TIME
87972DYI
2.4V
t_F
0.5V
QA0:QA3,
QB0:QB3,
QC0:QC3,
QSYNC,
QFB
V_DDO
2
t _PW
V_DDO
2
t _PERIOD
odc = ^{t PW}
t _PERIOD
V_DDO
2
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
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9
REV. E JUNE 25, 2010