CDC2582

3.3-V PHASE-LOCK LOOP CLOCK DRIVER

WITH DIFFERENTIAL LVPECL CLOCK INPUTS

SCAS379B – FEBRUARY 1993 – REVISED FEBRUARY 1996

1

POST OFFICE BOX 655303

and Clock-Generation Applications

Inputs to 12 TTL-Compatible Outputs

Outputs to Operate at One-Half or Double

the Input Frequency

Synchronize the Outputs With the Clock

Inputs

Resistors to Dampen Transmission-Line

Effects

Significantly Reduces Power Dissipation

Switching Noise

PAH PACKAGE

(TOP VIEW)

15 16

4Y3

GND

4Y2

GND

4Y1

GND

GND

3Y3

GND

39

38

37

36

35

34

33

32

31

30

29

28

27

17

1

2

3

4

5

6

7

8

9

10

11

12

13

GND

1Y1

GND

1Y2

GND

1Y3

GND

GND

2Y1

18 19 20 21

51 50 49 48 47

52

46

44 43 42

45

22 23 24 25 26

41 40

14

description

The CDC2582 is a high-performance, low-skew, low-jitter clock driver. It uses a phase-lock loop (PLL) to

precisely align the frequency and phase of the clock output signals to the differential LVPECL clock (CLKIN,

CLKIN) input signals. It is specifically designed to operate at speeds from 50 MHz to 100 MHz or down to 25 MHz

on outputs configured as half-frequency outputs. Each output has an internal 26-

Ω series resistor that improves

The feedback input (FBIN) synchronizes the frequency of the output clocks with the input clock (CLKIN, CLKIN)

signals. One of the twelve output clocks must be fed back to FBIN for the PLL to maintain synchronization

between the differential CLKIN and CLKIN inputs and the outputs. The output used as feedback is synchronized

to the same frequency as the clock (CLKIN and CLKIN) inputs.

Copyright

© 1996, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

EPIC-

ΙΙB is a trademark of Texas Instruments Incorporated.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.