Connection Diagrams

Pin Descriptions

Pin No.

LMX233XLSLB

24-pinCSP

Package

Pin No.

LMX233XLTM

20-pin TSSOP

Package

Pin

Name

I/O

Description

24

1

V

—

Power supply voltage input for RF analog and RF digital circuits. Input

may range from 2.7V to 5.5V. V

capacitors should be placed as close as possible to this pin and be

connected directly to the ground plane.

22

V

—

Power Supply for RF charge pump. Must be

≥ V

33

D

O

Internal charge pump output. For connection to a loop filter for driving

the input of an external VCO.

4

4

GND

—

Ground for RF digital circuitry.

55

f

I

RF prescaler input. Small signal input from the VCO.

66

f

I

RF prescaler complementary input. A bypass capacitor should be

placed as close as possible to this pin and be connected directly to the

ground plane. Capacitor is optional with some loss of sensitivity.

7

7

GND

—

Ground for RF analog circuitry.

8

8

OSC

in

I

Oscillator input. The input has a V

driven from an external CMOS or TTL logic gate.

10

9

GND

—

11

10

F

O

Multiplexed output of the RF/IF programmable or reference dividers,

RF/IF lock detect signals and Fastlock mode. CMOS output

(see

Programmable Modes).

12

11

Clock

I

High impedance CMOS Clock input. Data for the various counters is

clocked in on the rising edge, into the 22-bit shift register.

14

12

Data

I

Binary serial data input. Data entered MSB first. The last two bits are

the control bits. High impedance CMOS input.

Chip Scale Package (SLB)

(Top View)

DS012806-39

Order Number LMX2330LSLB, LMX2331LSLB or

LMX2332LSLB

NS Package Number SLB24A

Thin Shrink Small Outline Package (TM)

(Top View)

DS012806-2

Order Number LMX2330LTM, LMX2331LTM or

LMX2332LTM

NS Package Number MTC20

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