tda5100a Infineon Technologies Corporation, tda5100a Datasheet - Page 23

• Manufacturer Part Number: tda5100a
• Description: Ask Transmitter 434 Mhz
• Manufacturer: Infineon Technologies Corporation

Wireless Components
2. Design hints on the buffered clock output (CLKOUT)
The CLKOUT pin is an open collector output. An external pull up resistor (RL)
should be connected between this pin and the positive supply voltage. The
value of RL is depending on the clock frequency and the load capacitance CLD
(PCB board plus input capacitance of the microcontroller). RL can be calculated
to:
Remark: To achieve a low current consumption and a low
Table 4-2
spurious radiation, the largest possible RL should be chosen.
CL
10
20
[
5
pF
]
4 - 6
RL
=
fCLKOUT=3.39 MHz
fCLKOUT
1
*
8
*
CLD
RL
Specification, March 2001
[
kOhm
6.8
3.3
1.8
]
TDA 5100 A
Applications
preliminary