TDA5250XT Infineon Technologies, TDA5250XT Datasheet - Page 72

• Manufacturer Part Number: TDA5250XT
• Manufacturer: Infineon Technologies

Specifications of TDA5250XT

• 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

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
72
Data
400ms
Data
Data
t [ms]
t [ms]
t [ms]
TDA5250 D2
Version 1.7
Application
data_timing011.wmf
2007-02-26