Pin No.

for CSP

Package

Pin No.

for

TSSOP

package

Pin Name

I/O

Description

9

10

OSCin

I

Oscillator input which can be configured to drive both the IF and RF R counter inputs

or only the IF R counter depending on the state of the OSC programming bit. (See

functional description 1.1 and programming description 3.1.)

10

11

FoLD

O

Multiplexed output of N or R divider and RF/IF lock detect. Active High/Low CMOS

output except in analog lock detect mode. (See programming description 3.1.5.)

11

12

RF_EN

I

the charge pump output when LOW. Bringing RF_EN high powers up RF PLL

depending on the state of RF_CTL_WORD. (See functional description 1.9.)

12

13

IF_EN

I

IF PLL Enable. Powers down IF N and R counters, prescaler, and will TRI-STATE the

charge pump output when LOW. Bringing IF_EN high powers up IF PLL depending on

the state of IF_CTL_WORD. (See functional description 1.9.)

13

14

CLOCK

I

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

24 - bit shift register on the rising edge.

14

15

DATA

I

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

High impedance CMOS input.

15

16

LE

I

Load enable high impedance CMOS input. Data stored in the shift registers is loaded

into one of the 4 internal latches when LE goes HIGH. (See functional description 1.7.)

16

17

GND

-

Ground for IF analog circuitry.

17

18

fin IF

I

IF prescaler complimentary input. A bypass capacitor should be placed as close as

possible to this pin and be connected directly to the ground plane.

18

19

fin IF

I

IF prescaler input. Small signal input from the VCO.

19

20

GND

-

Ground for IF digital circuitry.

20

21

CPo

IF

O

IF charge pump output. For connection to a loop filter for driving the input of an

external VCO.

21

22

Vp

IF

-

Power supply for IF charge pump. Must be

≥ V

22

23

Vcc

IF

-

IF power supply voltage input. Must be equal to Vcc

5.5 V. Bypass capacitors should be placed as close as possible to this pin and be

connected directly to the ground plane.

23

24

OUT1

O

Programmable CMOS output. Level of the output is controlled by IF_N [18] bit.

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