Philips Semiconductors

Preliminary specification

PCK2010

CK98 (100/133MHz) Spread Spectrum System Clock

Generator

1999 Mar 01

11

AC CHARACTERISTICS (Continued)

TEST CONDITIONS

LIMITS

SYMBOL

PARAMETER

TEST CONDITIONS

UNIT

NOTES

SYMBOL

PARAMETER

Measurement loads

(lumped)

Measure points

MIN

TYP

MAX

UNIT

NOTES

CPUCLK to 3V66 CLK, CPU

leads

CPU@30pF,

3V66@30pF

CPU@1.25V,

3V66@1.5V

0.0

1.5

ns

1

3V66 CLK to PCICLK, 3V66

leads

3V66@30pF,

PCI@30pF

3V66@1.5V,

PCI@1.5V

1.5

3.5

ns

1

CPUCLK to IOAPIC, CPU

leads

CPU@20pF,

IOAPIC@20pF

3CPU@1.25V,

IOAPIC@1.25V

1.5

4.0

ns

1

PCICLK to CPUCLK, CPU

leads

PCI@30pF

CPU@30pF

PCI@1.5V

CPU@1.25V

5.8

ns

CPUDIV2 to CPUCLK,

CPUDIV2 leads

CPUDIV2@20pF

CPU@30pF

CPUDIV2@

CPU@1.25V

1.6

ns

IOAPICCLK to CPUCLK,

IOAPIC leads

IOAPIC@20pF

CPU@30pF

IOAPIC@20pF

CPU@1.25V

3.7

ns

3V66 CLK to CPUCLK, 3V66

leads

3V66@30pF

CPU@30pF

3V66@1.5V

CPU@1.25V

1.7

ns

NOTES:

2. Period, jitter, offset and skew measured on rising edge @1.25V for 2.5V clocks and @ 1.5V for 3.3V clocks.

3. The PCICLK is the CPUCLK divided by four at CPUCLK = 133.MHz. The 3V66 CLK is internal VCO frequency divided by three at CPUCLK

= 100MHz.

4. 3V66 CLK is internal VCO frequency divided by two at CPUCLK = 133MHz. The 3V66 CLK is internal VCO frequency divided by three at

CPUCLK = 100MHz.

stable and operating within specification.

9. The average period over any 1

µs period of time must be greater than the minimum specified period.

10. Calculated at minimum edge-rate (1V/ns) to guarantee 45/55% duty-cycle. Pulse width is required to be wider at faster edge-rate to ensure

duty-cycle specification is met.

11. Output (see Figure 3 for measure points).

PCK2010 SPREAD SPECTRUM FUNCTION TABLE

SPREAD#

SEL133/100#

SEL1

SEL0

Intel CK133

Intel CK133

Philips PCK2010

Philips

PCK2010

pin 34

pin 28

pin 33

pin 32

Function

48MHz PLL

Function

48MHz PLL

0 (active)

0 (100MHz)

0

0

3-State to

High Impedance

Inactive

3-State to

High Impedance

Inactive

0 (active)

0 (100MHz)

0

1

(Reserved)

(Reserved)

100MHz, Center

Spread

±0.5%

Active

0 (active)

0 (100MHz)

1

0

100MHz, Down

Spread – 0.5%

Inactive

100MHz, Down

Spread – 0.5%

Inactive

0 (active)

0 (100MHz)

1

1

100MHz, Down

Spread – 0.5%

Active

100MHz, Down

Spread – 0.5%

Active

0 (active)

1 (133MHz)

0

0

Test Mode

Active

Test Mode

Active

0 (active)

1 (133MHz)

0

1

(Reserved)

(Reserved)

133MHz, Center

Spread

±0.5%

Active

0 (active)

1 (133MHz)

1

0

133Mhz, Down

Spread – 0.5%

Inactive

133MHz, Down

Spread – 0.5%

Inactive

0 (active)

1 (133MHz)

1

1

133Mhz, Down

Spread – 0.5%

Active

133MHz, Down

Spread – 0.5%

Active

1 (inactive)

0 (100MHz)

0

0

3-State to

High Impedance

Inactive

3-State to

High Impedance

Inactive