LMX2335UTMX datasheet(5/48 Pages) NSC

tên linh kiện	LMX2335UTMX

Giải thích chi tiết về linh kiện	PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications

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Pin Descriptions (Continued)

Name

Pin No.

LMX2336U

20-Pin

UTCSP

Pin No.

LMX2336U

20-Pin

TSSOP

Pin No.

LMX2336U

24-Pin

CSP

Pin No.

LMX2335U

16-Pin

TSSOP

Pin No.

LMX2335U

16-Pin

CSP

I/O

Description

GND

13

14

16

X

–

LMX2335U: Don’t care.

LMX2336U: Ground for the RF2 PLL analog

circuitry.

f

IN RF2

14

15

17

X

I

LMX2335U: Don’t care.

LMX2336U: RF2 PLL prescaler complementary

input. For single ended operation, this pin should

be AC grounded. The LMX2336U RF2 PLL can

be driven differentially when the bypass

capacitor is omitted.

f

IN RF2

15

16

18

12

11

I

RF2 PLL prescaler input. Small signal input from

the VCO.

GND

16

17

19

13

12

−

LMX2335U: Ground for the RF2 PLL analog and

digital circuits, MICROWIRE, F

oLD and oscillator

circuits. LMX2336U: Ground for the RF2 PLL

digital circuitry, MICROWIRE, F

oLD and

oscillator circuits.

D

o

RF2

17

18

20

14

13

O

RF2 PLL charge pump output. The output is

connected to the external loop filter, which drives

the input of the VCO.

V

P

RF2

18

19

22

15

14

–

RF2 PLL charge pump power supply. Must be

≥

V

CC.

V

CC

19

20

23

16

15

–

Power supply bias for the RF2 PLL analog and

digital circuits, MICROWIRE, F

oLD and oscillator

circuits. V

CC may range from 2.7V to 5.5V.

Bypass capacitors should be placed as close as

possible to this pin and be connected directly to

the ground plane.

NC

X

1, 9, 13,

21

X

–

LMX2335U: Don’t Care.

LMX2336U: No connect.

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