PCK2023DGG Просмотр технического описания (PDF) - Philips Electronics

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PCK2023DGG

CK408 (66/100/133/200 MHz) spread spectrum differential system clock generator

Philips Electronics 

Philips Semiconductors

CK408 (66/100/133/200 MHz) spread

spectrum differential system clock generator

Product data

PCK2023

POWER-UP SEQUENCE

Figure 6 shows the power-up sequence for the PCK2023. Once power is applied to the device, an internal sense circuit generates a signal

when the supply is above approximately 2 volts. This signal generates a series of timed signals that control the sequential event inside the

device. First, the multifunction pins are latched into the device. These latched signals are then used to define the mode of operation of the

device. A short time later, the PLL is enabled and begins running. After XX ms, the clock outputs are enabled and begin running

INTERNAL 3.3 V

SUPPLY

INTERNAL POWER

GOOD

SIGNAL LATCH

OPERATING MODE

SET/PLL START

OUTPUTS ENABLED

2001 Sep 07

CRYSTAL

14.318 MHz

Figure 6. Power-up sequence

VDD

CL

HOST

DUT

HOST

RS

RS = 33.2 Ω

RS

RP = 500 Ω

RP = 50 Ω

Figure 7. Host clock measurements

15

SW00855

SW00854

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