TDA5255XT Infineon Technologies, TDA5255XT Datasheet - Page 70
TDA5255XT
Manufacturer Part Number
TDA5255XT
Description
Manufacturer
Infineon Technologies
Datasheet
1.TDA5255XT.pdf
(91 pages)
Specifications of TDA5255XT
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Operating Temperature Classification
Industrial
Product Depth (mm)
4.4mm
Product Length (mm)
9.7mm
Operating Supply Voltage (min)
2.1V
Operating Supply Voltage (max)
5.5V
Lead Free Status / Rohs Status
Compliant
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Default values:
ON= 65215 = 1111111011000000
OFF= 62335 = 1111001110000000
t
t
3.9
The settings for Self Polling Mode depend very much on the timing of the transmitted Signal. To
create an example we consider following data structure transmitted in FSK.
Figure 3-34
According to existing synchronization techniques there are some synchronization bursts in front of
the data added (code violation!). A minimum of 4 Frames is transmitted. Data are preferably
Manchester encoded to get fastest respond out of the Data Rate Detection.
Target Application:
One possible Solution:
t
Data Sheet
ON
OFF
- received Signal has code violation as described before
- total mean current consumption below 1mA
- data reception within max. 400ms after first transmitted frame
ON
~10ms @ f
= 15ms, t
~100ms @ f
Example for Self Polling Mode
OFF
RC
Example for transmitted Data-structure
= 135ms
RC
= 32kHz
= 32kHz
4 Frames
Frame-
details
Sync
b
50ms 50ms
b
Data
Preamble
Syncronisation Preamble
Data
70
Data
400ms
Data
Data
t [ms]
t [ms]
t [ms]
TDA5255 E1
Version 1.2
Application
data_timing011.wmf
2007-02-26
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