TDA5255XT Infineon Technologies, TDA5255XT Datasheet - Page 22

• Manufacturer Part Number: TDA5255XT
• Manufacturer: Infineon Technologies

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

2.4.13
A Bandgap Reference Circuit provides a temperature stable 1.2V reference voltage for the device.
A power down mode is available to switch off all subcircuits that are controlled by the bidirectional
Powerdown&DataDetect PwdDD pin (pin 27) as shown in the following table. Power down mode
can either be activated by pin 27 or bit D14 in Register 00h. In power down mode also pin 28 (DATA)
is affected (see Section 2.4.17).
Table 2-5
2.4.14
The timing and data control unit contains a wake-up logic unit, an I
interface, a “data valid” detection unit and a set of configuration registers as shown in the
subsequent figure.
Figure 2-6
Data Sheet
Bandgap Reference Circuitry and Powerdown
Timing and Data Control Unit
PwdDD Pin Operating States
Timing and Data Control Unit
Ground/VSS
PwdDD
VDD
RSSI
BLOCK ENABLE
RX DATA
FSK DATA
ASK DATA
ASK / FSK
RX / TX
ADC
6 Bit
INTERNAL BUS
DATA VALID
INTERFACE
DETECTOR
TH1<T
I
threshold TH3
FREQUENCY
2
AMPLITUDE
C / 3Wire
window
GATE
SEQUENCER
POWER ON
22
CONTROL
<TH2
LOGIC
Powerdown Mode
Operating State
Device On
XTAL-Osz.
WAKEUP
RC-Osz.
18 MHz
LOGIC
32kHz
CLKDiv
PwdDD
Data
AskFsk
RxTx
Reset
Functional Description
2
C/3-wire microcontroller
TDA5255 E1
Version 1.2
2007-02-26
logic.wmf