LMX2330UTMX datasheet(3/42 Pages) NSC

tên linh kiện	LMX2330UTMX

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

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Connection Diagrams

Chip Scale Package (SLB)

(Top View)

Thin Shrink Small Outline Package (TM)

(Top View)

10136639

10136602

Pin Descriptions

Name

Pin No.

24-Pin CSP

Pin No.

20-Pin TSSOP

I/O

Description

V

CC

24

1

—

Power supply bias for the RF PLL analog and digital 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.

V

P RF

2

—

RF PLL charge pump power supply. Must be

≥ V

CC.

D

o RF

3

O

RF PLL charge pump output. The output is connected to the external loop

filter, which drives the input of the VCO.

GND

4

—

Ground for the RF PLL digital circuitry.

f

IN RF

5

I

RF PLL prescaler input. Small signal input from the VCO.

f

IN RF

6

I

RF PLL prescaler complementary input. For single ended operation, this

pin should be AC grounded. The LMX233xU RF PLL can be driven

differentially when the bypass capacitor is omitted.

GND

7

—

Ground for the RF PLL analog circuitry.

OSC

in

8

I

Reference oscillator input. The input has an approximate V

CC/2 threshold

and can be driven from an external CMOS or TTL logic gate.

GND

10

9

—

Ground for the IF PLL digital circuits, MICROWIRE™,F

oLD, and oscillator

circuits.

F

oLD

11

10

O

Programmable multiplexed output pin. Functions as a general purpose

CMOS TRI-STATE output, RF/IF PLL push-pull analog lock detect output,

N and R divider output or Fastlock output, which connects a parallel

resistor to the external loop filter.

Clock

12

11

I

MICROWIRE Clock input. High impedance CMOS input. Data is clocked

into the 22-bit shift register on the rising edge of Clock.

Data

14

12

I

MICROWIRE Data input. High impedance CMOS input. Binary serial data.

The MSB of Data is shifted in first. The last two bits are the control bits.

LE

15

13

I

MICROWIRE Latch Enable input. High impedance CMOS input. When LE

transitions HIGH, Data stored in the shift register is loaded into one of 4

internal control registers.

GND

16

14

—

Ground for the IF PLL analog circuitry.

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