
Philips Semiconductors
Product specification
PCK2010R
CK98R (100/133MHz) RCC spread spectrum
system clock generator
2
1999 Oct 19
853–2179 22543
FEATURES
Mixed 2.5 V and 3.3 V operation
Four CPU clocks at 2.5 V
Eight PCI clocks at 3.3 V, one free-running
(synchronous with CPU clocks)
Four 3.3 V fixed clocks @ 66 MHz
Two 2.5 V CPUDIV2 clocks @ CPU clock frequency
Three 2.5 V IOAPIC clocks @ 16.67 MHz
One 3.3 V 48 MHz USB clock
Two 3.3 V reference clocks @ 14.318 MHz
Reference 14.31818 MHz Xtal oscillator input
133 MHz or 100 MHz operation
Power management control input pins
CPU clock jitter
≤
250 ps cycle-cycle
CPU clock skew
≤
175 ps pin-pin
0.0ns – 1.5 ns CPU - 3V66 delay
1.5ns – 3.5 ns 3V66 - PCI delay
1.5ns – 4.0 ns CPU - IOAPIC delay
1.5ns – 4.0 ns CPU - PCI delay
Available in 56-pin SSOP package
±
0.5% center spread spectrum capability via select pins
–0.5% down spread spectrum capability via select pins
DESCRIPTION
The PCK2010R is a clock generator (frequency synthesizer) chip for
a Pentium II and other similar processors.
The PCK2010R has four CPU clock outputs at 2.5 V, two CPUDIV2
clock outputs running at CPU clock frequency (66 MHz or 50 MHz
depending on the state of SEL133/100) and four 3V66 clocks
running at 66MHz. There are eight PCI clock outputs running at
33 MHz. One of the PCI clock outputs is free-running. Additionally,
the part has three 2.5 V IOAPIC clock outputs at 16.67 MHz and two
3.3 V reference clock outputs at 14.318 MHz. All clock outputs meet
Intel’s drive strength, rise/fall time, jitter, accuracy, and skew
requirements.
The part possesses dedicated power-down, CPUSTOP, and
PCISTOP input pins for power management control. These inputs
are synchronized on-chip and ensure glitch-free output transitions.
When the CPUSTOP input is asserted, the CPU clock outputs and
3V66 clock outputs are driven LOW. When the PCISTOP input is
asserted, the PCI clock outputs are driven LOW.
Finally, when the PWRDWN input pin is asserted, the internal
reference oscillator and PLLs are shut down, and all outputs are
driven LOW.
PIN CONFIGURATION
SW00504
1
2
3
4
5
6
7
8
9
10
11
12
45
46
47
48
49
50
51
52
53
54
55
56
V
SS
REF1
V
DD
3V
XTAL_IN
XTAL_OUT
V
SS
PCICLK_F
PCICLK1
V
DD
3V
PCICLK2
CPUCLK0
V
SS
CPUCLK1
V
DD
3V
CPUCLK2
PCICLK3
13
14
15
16
17
18
39
40
41
42
43
44
V
SS
PCICLK4
PCICLK5
V
DD
3V
PCICLK6
CPUCLK3
PCICLK7
19
38
V
SS
20
21
22
23
24
25
32
33
34
35
36
37
V
DD
3V
3V66_0
3V66_1
SEL1
SEL0
V
SS
26
31
27
30
48MHz_USB
28
29
SEl133/100
REF0
V
SS
3V66_0
3V66_1
V
DD
3V
V
DD
25V
APIC2
APIC1
APIC0
V
DD
25V
CPUDIV2_1
CPUDIV2_0
V
SS
V
DD
25V
V
SS
V
DD
25V
V
SS
V
SS
PCISTOP
CPUSTOP
PWRDWN
SPREAD
V
DD
3V
V
SS
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
ORDER CODE
DRAWING NUMBER
56-Pin plastic SSOP
0
°
C to +70
°
C
PCK2010R DL
SOT371-1
Intel and Pentium are registered trademarks of Intel Corporation.