
COMMERCIALTEMPERATURERANGE
IDTCV137
PROGRAMMABLEFLEXPC CLOCKFORAMDK8PROCESSORATIRS480
1
MARCH 2005
IDTCV137
COMMERCIAL TEMPERATURE RANGE
PROGRAMMABLE FLEXPC
CLOCK FOR AMD K8
PROCESSOR ATI RS480
SRC
SSC
N Programming
SRC
CPU[1:0]
SRC[2:1]
USB48
24_48MHz
PCI0
SRC[7:3], 0
PCI/
SRC/
Host/
48MHz/
SRC PLL
SSC
N Programming
CPU PLL
SSC
N Programming
Fixed PLL
No SSC
14.318MHz
Osc
Reset#
HTT66
CLKREQ0#
CLKREQ1#
TURBO1#
REF[2:0]
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
2005 Integrated Device Technology, Inc.
DSC - 6580/23
FEATURES:
One high precision N and SSC programmable PLL for CPU
One high precision N and SSC programmable PLL for SRC[2:1]
One high precision N and SSC programmable PLL for SRC0
[7:3] (PCI Express)
One high precision PLL for 48MHz
Band-gap circuit for differential outputs
Support multiple spread spectrum modulation, down and
center
Support SMBus block read/write, index read/write
Selectable output strength for REF, PCI, 48MHz, HTT66
Available in SSOP and TSSOP packages
FUNCTIONAL BLOCK DIAGRAM
DESCRIPTION:
IDTCV137 is a 56 pin clock device for AMD advance K8 processors. The
CPU output buffer is designed to support up to 400MHz processor. This device
alsoimplementsBand-gapreferencedIREFtoreducetheimpactofVDDvariation
on differential outputs, which can provide more robust system performance.
Each CPU/SRC clock has its own Spread Spectrum selection, which allows
for isolated changes instead of affecting other clock groups.
KEY SPECIFICATION:
CPU CLK cycle to cycle jitter < 85ps
SRC CLK cycle to cycle jitter < 100ps
OUTPUTTABLE
CPU
CLKREQ
SRC
HTT66
PCI
TURBO
USB48
24_48
REF
RESET#
2
8
1
113
1