ICS87608I Datasheet, PDF (7/12 Pages) List of Unclassifed Manufacturers – LOW VOLTAGE/LOW SKEW, 1:8 PCI/PCI-X ZERO DELAY CLOCK GENERATOR

Integrated
Circuit
Systems, Inc.
ICS87608I
LOW VOLTAGE/LOW SKEW, 1:8 PCI/PCI-X
ZERO DELAY CLOCK GENERATOR
PARAMETER MEASUREMENT INFORMATION
1.65V±5%
V_DD,
V_DDA,V_DDOX
LVCMOS
GND
SCOPE
Qx
2.05V±5% 1.25V±5%
V_DD,
V
DDA
V_DDOX
LVCMOS
GND
SCOPE
Qx
-1.65V±5%
3.3V OUTPUT LOAD AC TEST CIRCUIT
(Where X denotes outputs in the same Bank)
-1.25V±5%
3.3V/2.5V OUTPUT LOAD AC TEST CIRCUIT
V
DDOX
Qx
2
V
DDOX
Qy
2
t sk(o)
OUTPUT SKEW
V_DDOX
Qx
2
V_DDOX
Qy
2
t sk(b)
BANK SKEW
QAx,
QBx
V
DDOX
2
tcycle n
V
DDOX
2
➤
tcycle n+1
t jit(cc) = tcycle n –tcycle n+1
1000 Cycles
V
DDOX
2
➤
REF_IN
FB_IN
➤_t(Ø)
CYCLE-TO-CYCLE JITTER
STATIC PHASE OFFSET
QAx, QBx,
FB_OUT,
REF_OUT
V_DDOX
2
t _PW
V_DDOX
2
t _PERIOD
odc = ^{t PW}
t _PERIOD
V_DDOX
2
20%
Clock
Outputs
80%
t_R
OUTPUT PULSE WIDTH/PULSE WIDTH PERIOD
OUTPUT RISE/FALL TIME
87608AYI
www.icst.com/products/hiperclocks.html
7
V_DD
2
V_DD
2
80%
t_F
20%
REV. B MARCH 11, 2005