DS601-2

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©2003 Reg. No. 227 4001, ENGLAND

Page 9

Low-Power-Radio Transceiver IC

RF600T

Achieving Optimum Range

Range is dependant on many factors including

1.

RF Power output

2.

Receiver sensitivity

3.

Antenna efficiency

4.

Local environmental conditions and any local Interference

5.

Data Type which is being transmitted.

Whilst items 1-4 are dependant on the system hardware design, item ‘5’ is equally important and often

overlooked. Given that there is a legal maximum power output which can be transmitted, and a limit on the

sensitivity of the receiver (usually constrained by cost), and that the antenna can never achieve 0dB loss

(100% efficiency), then the data structure and coding is an important aspect of the design.

The RF600T uses a fully balanced Manchester encoded data protocol designed for optimum use of the

radio transmission path. Manchester encoding enables the receiver ‘data slicer’ to maintain efficiency for

the duration of the data packet, (unlike many other encoder/decoder systems) which results in reduced bit

errors and therefore ensures maximum range.

Custom Versions

Customisation of the RF600T is available, please contact our sales department for further information.

Technical Specifications: Absolute Maximum Ratings

Item

Rating

Units

Supply voltage

-0.3 to 6.9

V

Input voltage

-0.3 to VDD + 0.3

V

Output voltage

-0.3 to VDD+ 0.3

V

Max output current

25

mA

Storage temperature

-55 to +125

°C (Note)

Lead soldering temp

300

°C (Note)

ESD rating

4000

V

Note: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.

Electrical Characteristics

Min

Typical

Max

Unit

Operating current (average)

Vdd = 2 - 3V

Vdd = 3 - 6.6V

0.3

0.7

1.2

1.6

mA

High level Input voltage

V

Low level input voltage

0.3

V

High level output voltage

V

Low level output voltage

V

Output Pin Current rating

-

25

mA

LED sink current

5.0

25

mA