OCTOBER 28, 2016

3

8-OUTPUT CK420BQ DERIVATIVE

9SQL4958 DATASHEET

Pin Descriptions

PIN #

PIN NAME

TYPE

DESCRIPTION

1

vSS_EN_tri

LATCHED

IN

Latched select input to select spread spectrum amount at initial power up :

1 = -0.5% spread, M = -0.25%, 0 = Spread Off

2

GNDXTAL

GND

GND for XTAL

3

XIN/CLKIN_25

IN

Crystal input or Reference Clock input. Nominally 25MHz.

4

X2

OUT

Crystal output.

5

VDDXTAL3.3

PWR

Power supply for XTAL, nominal 3.3V

6

VDDREF3.3

PWR

VDD for REF output. nominal 3.3V.

7

vSADR/REF3.3

LATCHED

I/O

Latch to select SMBus Address/3.3V LVCMOS copy of X1/REFIN pin

8

GNDREF

GND

Ground pin for the REF outputs.

9

GNDDIG

GND

Ground pin for digital circuitry

10

SCLK_3.3

IN

Clock pin of SMBus circuitry, 3.3V tolerant.

11

SDATA_3.3

I/O

Data pin for SMBus circuitry, 3.3V tolerant.

12

VDDDIG3.3

PWR

3.3V digital power (dirty power)

13

VDDIO

PWR

Power supply for differential outputs

14

vOE0#

IN

Active low input for enabling output 0. This pin has an internal 120kohm pull-

down.

1 =disable outputs, 0 = enable outputs

15

BCLK0

OUT

True output of differential BCLK.

16

BCLK0#

OUT

Complement output of differential BCLK.

17

vOE1#

IN

Active low input for enabling output 1. This pin has an internal 120kohm pull-

down.

1 =disable outputs, 0 = enable outputs

18

BCLK1

OUT

True output of differential BCLK.

19

BCLK1#

OUT

Complement output of differential BCLK.

20

VDD3.3

PWR

Power supply, nominal 3.3V

21

VDDIO

PWR

Power supply for differential outputs

22

GND

GND

Ground pin.

23

BCLK2

OUT

True output of differential BCLK.

24

BCLK2#

OUT

Complement output of differential BCLK.

25

vOE2#

IN

Active low input for enabling output 2. This pin has an internal 120kohm pull-

down.

1 =disable outputs, 0 = enable outputs

26

BCLK3

OUT

True output of differential BCLK.

27

BCLK3#

OUT

Complement output of differential BCLK.

28

vOE3#

IN

Active low input for enabling output 3. This pin has an internal 120kohm pull-

down.

1 =disable outputs, 0 = enable outputs

29

GNDA

GND

Ground pin for the PLL core.

30

VDDA3.3

PWR

3.3V power for the PLL core.

31

VDDIO

PWR

Power supply for differential outputs

32

BCLK4

OUT

True output of differential BCLK.

33

BCLK4#

OUT

Complement output of differential BCLK.

34

vOE4#

IN

Active low input for enabling output 4. This pin has an internal 120kohm pull-

down.

1 =disable outputs, 0 = enable outputs

35

BCLK5

OUT

True output of differential BCLK.

36

BCLK5#

OUT

Complement output of differential BCLK.

37

vOE5#

IN

Active low input for enabling output 5. This pin has an internal 120kohm pull-

down.

1 =disable outputs, 0 = enable outputs

38

VDD3.3

PWR

Power supply, nominal 3.3V

39

VDDIO

PWR

Power supply for differential outputs