mc13109 Freescale Semiconductor, Inc, mc13109 Datasheet - Page 14

• Manufacturer Part Number: mc13109
• Description: Universal Cordless Telephone Subsystem
• Manufacturer: Freescale Semiconductor, Inc

Power Supply Voltage
base unit. The handset is battery powered and can operate
on two ro three NiCad cells or on 5.0 V power.
PLL Frequency Synthesizer General Description
programmable universal dual phase locked loop (PLL). This
dual PLL is fully programmable thorugh the MCU serial
interface and supports most country channel frequencies
including USA (25 ch), France, Spain, Australia, Korea, New
Zealand, U.K., Netherlands and China (see channel
frequency tables in Appendix A).
reference frequency for the R x and T x PLL loops. The
48–TQFP
14
This circuit is used in a cordless telephone handset and
Figure 8 shows a simplified block diagram of the
The 2nd local oscillator and reference divider provide the
N/A
Pin
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
52–QFP
Pin
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
Spl Amp In
Gnd Audio
Mix 2 Out
Mix 1 Out
V cap Ctrl
Amp Out
Mix 1 In 2
Mix 1 In 1
LO 1 Out
Symbol
Gnd RF
Lim Out
Mix 2 In
T x Out
LO 1 In
C Cap
Lim In
T x In
C In
Ref
N/A
V B
PIN FUNCTION DESCRIPTION (continued)
Output
Output
Output
Output
Output
Type
Input
Input
Input
Input
Input
Input
Input
Input
Gnd
Gnd
–
–
–
–
–
Signal input for IF amplifier/limiter.
Ground pin for RF section of the IC.
Second mixer output.
Second mixer input.
Internal half supply analog ground reference.
First mixer output.
Negative polarity first mixer input.
Positive polarity first mixer input.
Tank elements for 1st LO multivibrator oscillator are connected to these pins.
1st LO varactor control pin.
Ground for audio section of the IC.
T x path input to Microphone Amplifier (ac coupled).
Microphone amplifier output.
Compressor input (ac coupled).
Compressor rectifier filter capacitor pin. Connect capacitor to V CC .
T x path limiter output.
Splatter amplifier input (ac coupled).
T x path audio output.
Reference voltage input for low battery detect.
Not used.
MC13109
programmed divider value for the reference divider is
selected based on the crystal frequency and the desired R x
and T x reference frequency values. Additional divide by 25
and divide by 4 blocks are provided to allow for generation of
the 1.0 kHz and 6.25 kHz reference frequencies required for
the U.K. The 14–bit T x counter is programmed for the desired
transmit channel frequency. The 14–bit R x counter is
programmed for the desired first local oscillator frequency. All
counters power up in the proper default state for USA
channel #6 and for a 10.24 MHz reference frequency crystal.
Internal fixed capacitors can be connected to the tank circuit
of the 1st LO through microprocessor control to extend the
sensitivity of the 1st LO for U.S. 25 channel operation.
Description
MOTOROLA ANALOG IC DEVICE DATA