Connection Diagram

24-Pin 5x4 LLP (LQ) Package

20068902

Note: Analog ground connected through exposed die attached pad.

Pin Descriptions

Pin Number

Name

I/O

Description

1

L1

—

RF2 VCO tank pin. An external inductor is required between pins

L1 and L2 to set the resonant frequency of RF2 VCO (PDC800).

2

L2

—

RF2 VCO tank pin. An external inductor is required between pins

L1 and L2 to set the resonant frequency of RF2 VCO (PDC800).

3

NC

—

Do not connect to any node on the printed circuit board.

4

NC

—

Do not connect to any node on the printed circuit board.

5V

DD

—

Supply voltage for RF analog circuitry

6

RF1out

O

RF output of RF1 VCO for PDC1500

7V

DD

—

Supply voltage for RF analog circuitry

8

RF2out

O

RF output of RF2 VCO for PDC800

9V

DD

—

Supply voltage for analog circuitry

10

V

CC

—

Supply voltage for digital circuitry

11

GND

—

Ground for digital circuitry

12

V

CC

—

Supply voltage for digital circuitry

13

LE

I

MICROWIRE Latch Enable

14

DATA

I

MICROWIRE Data

15

CLK

I

MICROWIRE Clock

16

CE

I

Chip enable control pin

17

BS

I

Band select control pin

18

LD

O

Lock detect pin

19

V

CC

—

Supply voltage for digital circuitry

20

OSCin

I

Reference frequency input

21

GND

—

Ground for digital circuitry

22

V

DD

—

Supply voltage for analog circuitry

23

GND

—

Ground for analog circuitry

24

V

DD

—

Supply voltage for RF analog circuitry

www.national.com

2