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See Technical Specifications

9LPRS477DKLFT

Programmable System Clock Chip for ATI RS790 - K8 Based Systems

Manufacturer:

Renesas Electronics Corporation
Mfr.Part #:

9LPRS477DKLFT
Datasheet:

9LPRS477DKLFT Datasheet (PDF)
Programmabe:

Not Verified
PLL:

Yes
Main Purpose:

AMD CPU, SATA/SRC
Input:

Crystal
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9LPRS477DKLFT General Description

The 9LPRS477 is a main clock synthesizer chip that provides all clocks required for ATI RD7xx-based systems using AMD processors. An SMBus interface allows full control of the device.

Key Features

Features/Benefits
- CPU, ATIG, SB_SRC and SRC outputs are independently programmable for frequency
- Spread Spectrum for EMI reduction
- Outputs may be disabled via SMBus
- External crystal load capacitors for maximum frequency accuracy
- Meets PCIEX Gen2 specifications
- Meets 30kHz to 33kHz SRC modulation rate specification for USB3.0
Key Specifications
- CPU outputs cycle-to-cycle jitter < 85ps
- SRC outputs cycle-to-cycle jitter < 125ps
- ATIG outputs cycle-to-cycle jitter < 125ps
- ± 300ppm frequency accuracy on CPU, SRC & ATIG clocks

Specifications

Series	-	Programmabe	Not Verified
PLL	Yes	Main Purpose	AMD CPU, SATA/SRC
Input	Crystal	Output	Clock, Crystal
Number of Circuits	1	Ratio - Input:Output	1:20
Differential - Input:Output	No/Yes	Frequency - Max	48MHz
Voltage - Supply	3.135V ~ 3.465V	Operating Temperature	0°C ~ 70°C (TA)
Mounting Type	Surface Mount