CDCU877RHAT datasheet(3/23 Pages) TI1

No. de pieza	CDCU877RHAT

Descripción Electrónicos	1.8-V PHASE LOCK LOOP CLOCK DRIVER

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Fabricante Electrónico	TI1 [Texas Instruments]

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CDCU877,, CDCU877A

1.8-V PHASE LOCK LOOP CLOCK DRIVER

SCAS688D – JUNE 2005 – REVISED JULY 2007

TERMINAL FUNCTIONS

TERMINAL

I/O

DESCRIPTION

NAME

GQL/ZQL

RHA/RTB

AGND

G1

7

Analog ground

AVDD

H1

8

Analog power

CK

E1

4

I

Clock input with a (10 k

Ω to 100 kΩ) pulldown resistor

Complementary clock input with a (10 k

Ω to 100 kΩ) pulldown

CK

F1

5

I

resistor

FBIN

E6

27

I

Feedback clock input

FBIN

F6

26

I

Complementary feedback clock input

FBOUT

H6

24

O

Feedback clock output

FBOUT

G6

25

O

Complementary feedback clock output

OE

F5

22

I

Output enable (asynchronous)

OS

D5

21

I

Output select (tied to GND or VDD)

B2, B3, B4, B5,

GND

C2, C5, H2, H5,

10

Ground

J2, J3, J4, J5

D2, D3, D4, E2,

1, 6, 9, 15, 20, 23,

VDDQ

E5, F2, G2, G3,

Logic and output power

28, 31, 36

G4, G5

A2, A1, D1, J1, K3,

3, 11, 14, 16, 19,

Y[0:9]

O

Clock outputs

A5, A6, D6, J6, K4

29, 33, 34, 38, 39

A3, B1, C1, K1,

2, 12, 13, 18, 17,

Y[0:9]

K2, A4, B6, C6,

O

Complementary clock outputs

30, 32, 35, 37, 40

K6, K5

FUNCTION TABLE

INPUTS

OUTPUTS

AVDD

OE

OS

CK

Y

FBOUT

PLL

GND

H

X

L

H

L

H

L

H

Bypassed/Off

GND

H

X

H

L

H

L

H

L

Bypassed/Off

GND

L

H

L

H

LZ

L

H

Bypassed/Off

LZ

GND

L

H

L

H

L

Bypassed/Off

Y7 Active

1.8 V Nominal

L

H

L

H

LZ

L

H

On

LZ

1.8 V Nominal

L

H

L

H

L

On

Y7 Active

1.8 V Nominal

H

X

L

H

L

H

L

H

On

1.8 V Nominal

H

X

H

L

H

L

H

L

On

1.8 V Nominal

X

L

LZ

Off

X

H

Reserved

3

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