ICS8761I Datasheet, PDF (8/16 Pages) Integrated Device Technology – LOW VOLTAGE, LOW SKEW, PCI / PCI-X CLOCK GENERATOR

ICS8761I
LOW VOLTAGE, LOW SKEW,
PCI / PCI-X 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 CORE/3.3V OUTPUT LOAD AC TEST CIRCUIT
-1.25V±5%
3.3V CORE/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 (Where X denotes outputs in the same Bank)
QAx,
QBx,
QCx,
QDx
V
DDOX
2
tcycle n
V
DDOX
2
➤
tcycle n+1
t jit(cc) = tcycle n –tcycle n+1
1000 Cycles
CYCLE-TO-CYCLE JITTER
V
DDOX
2 ^REF_CL:K
➤
FB_IN
➤_t(Ø)
STATIC PHASE OFFSET
QAx, QBx,
QCx, QDx,
FB_OUT
V_DDOX
2
t _PW
V_DDOX
2
t _PERIOD
odc = ^{t PW}
t _PERIOD
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
8761CYI
V_DDOX
2
20%
Clock
Outputs
80%
t_R
OUTPUT RISE/FALL TIME
www.idt.com
8
V_DD
2
V_DD
2
80%
t_F
20%
REV. C JULY 27, 2010