PCK2021DGG データシートの表示（PDF） - Philips Electronics
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PCK2021DGG Datasheet PDF : 15 Pages
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Philips Semiconductors
CK00 (100/133 MHz) spread spectrum
differential system clock generator
Product data
PCK2021
FEATURES
• 3.3 V operation
• Six differential CPU clock pairs
• Two PCI clocks at 33 MHz and one 3V66 clock
• Two 48 MHz clocks at 3.3 V
• One 14.318 MHz reference clock
• Power management control pins
• Host clock jitter less than 200 ps cycle-to-cycle
• Host clock skew less than 150 ps pin-to-pin
• Spread Spectrum capability
• Optimized frequency and spread spectrum performance
DESCRIPTION
The PCK2021 is a clock synthesizer/driver for a Pentium III™ and
other similar processors.
The PCK2021 has six differential pair CPU current source outputs,
two 33 MHz outputs, one 3V66 output, and two 48 MHz clocks
which can be disabled on power-up, and one 3.3 V reference clock
at 14.318 MHz which can also be disabled on power-up.
The part possesses a dedicated power-down input pin for power
management control. This input is synchronized on chip, and
ensures glitch-free output transitions. In addition, the part can be
configured to disable the 48 MHz outputs for lower power operation
and an increase in the performance of the functioning outputs. The
REF and PCI outputs can also be disabled for the highest
performance of the Host outputs.
PIN CONFIGURATION
VDDPCI 1
VDD48 2
48M_0/SELA 3
48M_1/SELB 4
VSS48 5
3V66 6
VSS3V66 7
VDD3V66 8
VDDCPU 9
HCLK0 10
HCLKB0 11
VDDCPU 12
HCLK1 13
HCLKB1 14
VSSCPU 15
HCLK2 16
HCLKB2 17
VDDCPU 18
REF 19
SPREAD 20
VSSREF 21
XIN 22
XOUT 23
VDDREF 24
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
48-Pin Plastic TSSOP
0 to +70 °C
48-Pin Plastic SSOP
0 to +70 °C
ORDER CODE
PCK2021DGG
PCK2021DL
48 PCI0
47 PCI1
46 VSSPCI
45 SEL133/100
44 NC
43 VDDA
42 VSSA
41 PWRDWN
40 VDDCPU
39 HCLK3
38 HCLKB3
37 VDDCPU
36 HCLK4
35 HCLKB4
34 VSSCPU
33 HCLK5
32 HCLKB5
31 VDD
30 MULTSEL0
29 MULTSEL1
28 VSS
27 VSSIREF
26 IREF
25 VDDIREF
SW00960
DRAWING NUMBER
SOT362-1
SOT370-1
Intel and Pentium III are trademarks of Intel Corporation.
2001 Oct 11
2
853-2301 27233
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