CDCVF2505

3.3V CLOCK PHASELOCK LOOP CLOCK DRIVER

SCAS640E − JULY 2000 − REVISED MARCH 2005

3

POST OFFICE BOX 655303

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

1Y[0−3]

2, 3, 5, 7

O

Clock outputs. These outputs are low-skew copies of CLKIN. Each output has an integrated 25-

Ω

series damping resistor.

CLKIN

1

I

Clock input. CLKIN provides the clock signal to be distributed by the CDCVF2505 clock driver.

CLKIN is used to provide the reference signal to the integrated PLL that generates the clock output

signals. CLKIN must have a fixed frequency and fixed phase for the PLL to obtain phase lock. Once

the circuit is powered up and a valid signal is applied, a stabilization time (100

µs) is required for the

PLL to phase lock the feedback signal to CLKIN.

CLKOUT

8

O

Feedback output. CLKOUT completes the internal feedback loop of the PLL. This connection is

made inside the chip and an external feedback loop should NOT be connected. CLKOUT can be

loaded with a capacitor to achieve zero delay between CLKIN and the Y outputs.

GND

4

Power

Ground

VDD3.3V

6

Power

3.3-V Supply

−0.5 V to 4.3 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±50 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±50 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±50 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance,

165.5

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PWR package

230.5

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

−65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES:

1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.

2. This value is limited to 4.3 V maximum.

3. The package thermal impedance is calculated in accordance with JESD 51.

recommended operating conditions

MIN

NOM

MAX

UNIT

Supply voltage, VDD

3

3.3

3.6

V

High-level input voltage, VIH

0.7 VDD

V

Low-level input voltage, VIL

0.3 VDD

V

Input voltage, VI

0

VDD

V

High-level output current, IOH

−12

mA

Low-level output current, IOL

12

mA

Operating free-air temperature, TA

−40

85

°C