XRK4993IR-5 datasheet(2/13 Pages) EXAR

Part #	XRK4993IR-5

Description	3.3V PROGRAMMABLE SKEW CLOCK BUFFER

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Manufacturer	EXAR [Exar Corporation]

Direct Link	http://www.exar.com

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XRK4993

2

3.3V PROGRAMMABLE SKEW CLOCK BUFFER

REV. 1.0.0

PRODUCT ORDERING INFORMATION

PRODUCT NUMBER

ACCURACY

OPERATING TEMPERATURE RANGE

XRK4993IR-2

250 ps

-40°C to +85°C

XRK4993CR-2

250 ps

0°C to +70°C

XRK4993IR-5

500 ps

-40°C to +85°C

XRK4993CR-5

500 ps

0°C to +70°C

XRK4993IR-7

750 ps

-40°C to +85°C

XRK4993CR-7

750 ps

0°C to +70°C

FIGURE 2. PIN OUT OF THE XRK4993

TABLE 1: FREQUENCY RANGE SELECT AND tU CALCULATION

[1]

fNOM (MHZ)

tU = 1 / (fNOM X N)

APPROXIMATE

FREQUENCY (MHZ) AT

WHICH

tU = 1.0ns

FSEL[2,3]

MIN

MAX

WHERE

N =

LOW

15

35

44

22.7

MID

25

60

26

38.5

HIGH

40

85

16

62.5

GND

PLL_BYPASS

SELB1

SELB0

OE

SELA1

SELA0

V

CCN

QA0

QA1

GND

QB0

QB1

CLKIN

VCCQ

FSEL

SELC0

SELC1

PE

V

CCN

QD1

QD0

GND

QC1

QC0

V

CCN

FB_IN

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

QSOP

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