CDCE62005 datasheet(4/80 Pages) TI

Part #	CDCE62005

Description	Five/Ten Output Clock Generator/Jitter Cleaner With Integrated Dual VCOs

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Manufacturer	TI [Texas Instruments]

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CDCE62005

SCAS862C – NOVEMBER 2008 – REVISED FEBRUARY 2010

www.ti.com

PIN FUNCTIONS (1) (continued)

TYPE

DESCRIPTION

NAME

QFN

REF_SEL

31

I

If Auto Reference Select Mode is OFF this Pin acts as External Input Reference Select Pin;

The REF_SEL signal selects one of the two input clocks:

REF_SEL [1]: PRI_IN is selected; REF_SEL [0]: SEC_IN is selected;

The input has an internal 150-k

Ω pull-up resistor if left unconnected it will default to logic level

“1”. If Auto Reference Select Mode in ON this Pin not used.

Power_Down

12

I

Active Low. Power down mode can be activated via this pin. See Table 15 for more details. The

input has an internal 150-k

Ω pull-up resistor if left unconnected it will default to logic level “1”.

SPI_LE has to be HIGH in order for the rising edge of Power_Down signal to load the

EEPROM.

SYNC

14

I

Active Low. Sync mode can be activated via this pin. See Table 15 for more details. The input

has an internal 150-k

Ω, pull-up resistor if left unconnected it will default to logic level “1”.

AUX IN

43

I

Auxiliary Input is a single ended input including an on-board oscillator circuit so that a crystal

may be connected.

AUX OUT

13

O

Auxiliary Output LVCMOS level that can be programmed via SPI interface to be driven by

Output 2 or Output 3.

PRI REF+

45

I

Universal Input Buffer (LVPECL, LVDS, LVCMOS) positive input for the Primary Reference

Clock,

PRI REF–

46

I

Universal Input Buffer (LVPECL, LVDS) negative input for the Primary Reference Clock. In case

of LVCMOS signaling Ground this pin.

SEC REF+

I

Universal Input Buffer (LVPECL, LVDS, LVCMOS) positive input for the Secondary Reference

3

Clock,

SEC REF–

2

I

Universal Input Buffer (LVPECL, LVDS,) negative input for the Secondary Reference Clock.

TESTOUTA

30

Analog

Analog Test Point for Use for TI Internal Testing. Pull Down to GND Via a 1k

Ωs Resistor.

REG_CAP1

4

Analog

Capacitor for the internal Regulator. Connect to a 10uF Capacitor (Y5V)

REG_CAP2

38

Analog

Capacitor for the internal Regulator. Connect to a 10uF Capacitor (Y5V)

VBB

48

Analog

Capacitor for the internal termination Voltage. Connect to a 1uF Capacitor (Y5V)

EXT_LFP

40

Analog

External Loop Filter Input Positive

EXT_LFN

41

Analog

External Loop Filter Input Negative.

PLL_LOCK

37

AI/O

Output that indicates PLL Lock Status. See Figure 37.

U0P:U0N

27, 28

O

The Main outputs of CDCE62005 are user definable and can be any combination of up to 5

LVPECL outputs, 5 LVDS outputs or up to 10 LVCMOS outputs. The outputs are selectable via

U1P:U1N:

19, 20

SPI interface. The power-up setting is EEPROM configurable.

U2P:U2N

16,17

U3P:U3N

9, 10

U4P:U4N

6, 7

4

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