ICS84025 Datasheet, PDF (6/12 Pages) Integrated Circuit Systems – CRYSTAL-TO-LVCMOS / LVTTL FREQUENCY SYNTHESIZER WITH FANOUT BUFFER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS84025
CRYSTAL-TO-LVCMOS / LVTTL
FREQUENCY SYNTHESIZER WITH FANOUT BUFFER
PARAMETER MEASUREMENT INFORMATION
V , V , V = 1.65V±5%
DD DDA DDO
LVCMOS
2.05V±5% 1.25V±5%
SCOPE
Qx
V
DD
V
DDO
LVCMOS
SCOPE
Qx
GND = -1.65V±5%
3.3V OUTPUT LOAD AC TEST CIRCUIT
2.4±0.9V 0.9V±0.075V
V_DD
V_DDO
LVCMOS
SCOPE
Qx
GND = -1.25V±5%
3.3V/2.5V OUTPUT LOAD AC TEST CIRCUIT
V
DDO
Qx
2
V
DDO
Qy
2
t sk(o)
GND = -0.9V±0.075V
3.3V/1.8V OUTPUT LOAD AC TEST CIRCUIT
OUTPUT SKEW
Q0:Q5
V
DDO
2
tcycle n
V
DDO
2
➤
tcycle n+1
tjit(cc) = tcycle n –tcycle n+1
1000 Cycles
Cycle-to-Cycle Jitter
V
DDO
2
➤
V_OH
V_REF
1σ contains 68.26% of all measurements
V_OL
2σ contains 95.4% of all measurements
3σ contains 99.73% of all measurements
4σ contains 99.99366% of all measurements
6σ contains (100-1.973x10^-7)% of all measurements
Reference Point
(Trigger Edge)
Histogram
Mean Period
(First edge after trigger)
Period Jitter
Q0:Q5
V
DDO
2
Pulse Width
t
PERIOD
odc, t & t
PW
PERIOD
84025EM
odc = ^{t PW}
t _PERIOD
20%
Clock Outputs
80%
t
R
OUTPUT RISE/FALL TIME
www.icst.com/products/hiperclocks.html
6
80%
t
F
20%
REV. A APRIL 16, 2003