CC2550RTK datasheet(9/59 Pages) TI

Part #	CC2550RTK

Description	Low-Cost Low-Power 2.4 GHz RF Transmitter

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Manufacturer	TI [Texas Instruments]

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CC2550

SWRS039B

Page 9 of 58

5

Pin Configuration

GND

Exposed die

attach pad

5

6

7

8

9CSn

10 RF_P

11 RF_N

12 AVDD

13

14

15

16

1

SCLK

2

SO (GDO1)

3

DVDD

4

DCOUPL

Figure 1: Pinout Top View

Note: The exposed die attach pad must be connected to a solid ground plane as this is the main

ground connection for the chip.

Pin #

Pin Name

Pin Type

Description

1

SCLK

Digital Input

Serial configuration interface, clock input

2

SO

(GDO1)

Digital Output

Serial configuration interface, data output.

Optional general output pin when CSn is high

3

DVDD

Power (Digital)

1.8 - 3.6 V digital power supply for digital I/O’s and for the digital core

voltage regulator

4

DCOUPL

Power (Digital)

1.6 - 2.0 V digital power supply output for decoupling.

NOTE: This pin is intended for use with the

CC2550 only. It can not be

used to provide supply voltage to other devices.

5

XOSC_Q1

Analog I/O

Crystal oscillator pin 1, or external clock input

6

AVDD

Power (Analog)

1.8 - 3.6 V analog power supply connection

7

XOSC_Q2

Analog I/O

Crystal oscillator pin 2

8

GDO0

(ATEST)

Digital I/O

Digital output pin for general use:

• Test signals

• FIFO status signals

• Clock output, down-divided from XOSC

• Serial input TX data

Also used as analog test I/O for prototype/production testing

9

CSn

Digital Input

Serial configuration interface, chip select

10

RF_P

RF Output

Positive RF output signal from PA

11

RF_N

RF Output

Negative RF output signal from PA

12

AVDD

Power (Analog)

1.8 - 3.6 V analog power supply connection

13

AVDD

Power (Analog)

1.8 - 3.6 V analog power supply connection

14

RBIAS

Analog I/O

External bias resistor for reference current

15

DGUARD

Power (Digital)

Power supply connection for digital noise isolation

16

SI

Digital Input

Serial configuration interface, data input

Table 11: Pinout Overview

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