CC2550-RTR1 datasheet(8/55 Pages) TI

8 / 55 page

CC2550

PRELIMINARY Data Sheet (Rev.1.2)

SWRS039A

Page 8 of 54

4.6

DC Characteristics

Tc = 25

°C if nothing else stated.

Digital Inputs/Outputs

Min

Max

Unit

Condition

Logic "0" input voltage

0.7

Logic "1" input voltage

VDD-0.7

VDD

Logic "0" output voltage

0.5

For up to 4 mA output current

Logic "1" output voltage

VDD-0.3

VDD

For up to 4 mA output current

Logic "0" input current

-50

Input equals 0 V

Logic "1" input current

Input equals VDD

Table 9: DC characteristics

4.7

Power On Reset

When the power supply complies with the requirements in Table 10 below, proper Power-On-

Reset functionality is guaranteed. Otherwise, the chip should be assumed to have unknown state

until transmitting an SRES strobe over the SPI interface. See Section 16.1 on page 23 for further

details.

Parameter

Min

Typ

Max

Unit

Condition/Note

Power-up ramp-up time.

From 0 V until reaching 1.8 V

Power off time

Minimum time between power off and power-on.

Table 10: Power-on reset requirements

Pin Configuration

GND

Exposed die

attach pad

9CSn

10 RF_P

11 RF_N

12 AVDD

SCLK

SO (GDO1)

DVDD

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.

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