cy28548 SpectraLinear Inc, cy28548 Datasheet - Page 22

• Manufacturer Part Number: cy28548
• Description: Clock Generator For Intel Crestline Chipset
• Manufacturer: SpectraLinear Inc

Rev 1.5 September 16, 2008
AC Electrical Specifications
Crystal
T
T
T
T
CPU at 0.7V
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
DC
PERIOD
R
CCJ
DC
PERIOD
PERIOD
PERIOD
PERIOD
PERIOD
PERIOD
PERIOD
PERIODSS
PERIODSS
PERIODSS
PERIODSS
PERIODSS
PERIODSS
PERIODSS
PERIODAbs
PERIODAbs
PERIODAbs
PERIODAbs
PERIODAbs
PERIODAbs
PERIODAbs
PERIODSSAbs
PERIODSSAbs
PERIODSSAbs
PERIODSSAbs
PERIODSSAbs
Parameter
/T
F
XIN Duty Cycle
XIN Period
XIN Rise and Fall Times
XIN Cycle to Cycle Jitter
CPUT and CPUC Duty Cycle
100 MHz CPUT and CPUC Period
133 MHz CPUT and CPUC Period
166 MHz CPUT and CPUC Period
200 MHz CPUT and CPUC Period
266 MHz CPUT and CPUC Period
333 MHz CPUT and CPUC Period
400 MHz CPUT and CPUC Period
100 MHz CPUT and CPUC Period, SSC Measured at 0V differential at 0.1s
133 MHz CPUT and CPUC Period, SSC Measured at 0V differential at 0.1s
166 MHz CPUT and CPUC Period, SSC Measured at 0V differential at 0.1s
200 MHz CPUT and CPUC Period, SSC Measured at 0V differential at 0.1s
266 MHz CPUT and CPUC Period, SSC Measured at 0V differential at 0.1s
333 MHz CPUT and CPUC Period, SSC Measured at 0V differential at 0.1s
400 MHz CPUT and CPUC Period, SSC Measured at 0V differential at 0.1s
100 MHz CPUT and CPUC Absolute
period
133 MHz CPUT and CPUC Absolute
period
166 MHz CPUT and CPUC Absolute
period
200 MHz CPUT and CPUC Absolute
period
266 MHz CPUT and CPUC Absolute
period
333 MHz CPUT and CPUC Absolute
period
400 MHz CPUT and CPUC Absolute
period
100 MHz CPUT and CPUC Absolute
period, SSC
133 MHz CPUT and CPUC Absolute
period, SSC
166 MHz CPUT and CPUC Absolute
period, SSC
200 MHz CPUT and CPUC Absolute
period, SSC
266 MHz CPUT and CPUC Absolute
period, SSC
Description
The device operates reliably with input
duty cycles up to 30/70 but the REF clock
duty cycle will not be within specification
When XIN is driven from an external
clock source
Measured between 0.3V
As an average over 1-µs duration
Measured at 0V differential at 0.1s
Measured at 0V differential at 0.1s
Measured at 0V differential at 0.1s
Measured at 0V differential at 0.1s
Measured at 0V differential at 0.1s
Measured at 0V differential at 0.1s
Measured at 0V differential at 1 clock
Measured at 0V differential at 1 clock
Measured at 0V differential @ 1 clock
Measured at 0V differential @ 1 clock
Measured at 0V differential @ 1 clock
Measured at 0V differential @ 1 clock
Measured at 0V differential @ 1 clock
Measured at 0V differential @ 1 clock
Measured at 0V differential @ 1 clock
Measured at 0V differential @ 1 clock
Measured at 0V differential @ 1 clock
Measured at 0V differential @ 1 clock
Measured at 0V differential at 0.1s
Measured at 0V differential at 0.1s
Condition
DD
and 0.7V
DD
10.02406
9.99900
7.49925
5.99940
4.99950
3.74963
2.99970
2.49975
7.51804
6.01444
5.01203
3.75902
3.00722
2.50601
9.91400
7.41425
5.91440
4.91450
3.66463
2.91470
2.41475
9.91406
7.41430
5.91444
4.91453
3.66465
69.841
Min.
47.5
45
–
–
CY28548
10.02607
Page 22 of 30
10.0100
7.50075
6.00060
5.00050
3.75038
3.00030
2.50025
7.51955
6.01564
5.01303
3.75978
3.00782
2.50652
10.0860
7.58575
6.08560
5.08550
3.83538
3.08530
2.58525
10.1362
7.62340
6.11572
5.11060
3.85420
Max.
52.5
71.0
10.0
500
55
Unit
ns
ns
ps
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%
%