ics87951-147 Integrated Device Technology, ics87951-147 Datasheet - Page 8

• Manufacturer Part Number: ics87951-147
• Description: Differential Or Lvcmos-input Lvcmos-output 2 9 250-mhz Clock Generator
• Manufacturer: Integrated Device Technology

D
3.3V O
C
O
QA, QB,
nCLK1
87951AYI-147
QAx, QBx,
QCx, QDx
-1.65V±5%
CLK1
IFFERENTIAL
YCLE
UTPUT
GND
GND
1.65V±5%
QCx,
V
V
LVCMOS
QDx
V
DDA
DDO
DD
,
-
TO
UTPUT
D
V
-C
UTY
PP
➤
YCLE
V
I
L
NPUT
DDO
C
2
OAD
Integrated
Circuit
Systems, Inc.
YCLE
J
ITTER
t
t
L
cycle n
AC T
jit(cc) =
/P
EVEL
t
PW
ULSE
odc =
EST
P
Cross Points
1000 Cycles
t
cycle n –
W
ARAMETER
C
t
t
PERIOD
PERIOD
IDTH
➤
t
IRCUIT
PW
➤
V
DDO
V
2
/P
DDO
2
x 100%
t
ERIOD
cycle n+1
t
cycle n+1
Qx
www.icst.com/products/hiperclocks.html
D
IFFERENTIAL
SCOPE
M
EASUREMENT
V
➤
CMR
V
DDO
2
8
-
TO
O
O
P
2.5V O
EXT_FB
HASE
-1.25V±5%
nCLK1
UTPUT
UTPUT
1.25V±5%
Qx
CLK0,
GND
Qy
CLK1
LVCMOS
-LVCMOS/LVTTL Z
V
V
Clock
Outputs
DDA
DDO
(where t (Ø) is any random sample, and t (Ø)
of the sampled cycles measured on controlled edges)
,
J
UTPUT
R
ITTER AND
S
ISE
KEW
20%
➤
I
V
t(Ø)
NFORMATION
/F
DDO
2
L
V
ALL
t jit(Ø) = t (Ø) — t (Ø)
➤
OAD
DDO
2
tsk(o)
t (Ø)
S
T
AC T
80%
IME
TATIC
t
R
mean
EST
P
= Static Phase Offset
HASE
ICS87951I-147
C
IRCUIT
mean
O
ERO
L
FFSET
OW
= Phase Jitter
D
S
80%
Qx
t
mean
ELAY
F
KEW
REV. A JUNE 14, 2005
SCOPE
is the average
, 1-
B
20%
UFFER
TO
V
DD
2
-9